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Analysis

  • max time kernel
    78s
  • max time network
    81s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250314-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/03/2025, 07:36

General

  • Target

    0624a3641140b1e609f181854519fa328dd04132f29d30da4eccca73e777f867.exe

  • Size

    683KB

  • MD5

    9dd53b03345030bc7decf3adbe608ce7

  • SHA1

    5999c980dfb72ed83cb4196a310cf2896650f997

  • SHA256

    0624a3641140b1e609f181854519fa328dd04132f29d30da4eccca73e777f867

  • SHA512

    a904e90ed7c076de06a2deaf929cbd0f63844c6a09664f068d1b2c41e34ab3cad365339de3e6868cc43de38d5246ac6749ee596883e9a720573043e4f7a36f5a

  • SSDEEP

    12288:cQ2T1tTzrnmsm81wCfvXsKbDTo7E3TlQCGVUPShkQ2lE1ToXi7SnATyQYzTa3mY:crT1t3dd8KvTo7E3TPOUPSaA1Tt7hTyC

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

startpc.localto.net:5139

Mutex

DC_MUTEX-YNHY3V1

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    bbBGhWmhMoJH

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

rc4.plain

Signatures

  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 1 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 4 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Unsecured Credentials: Credentials In Files 1 TTPs

    Steal credentials from unsecured files.

  • Windows security modification 2 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Obfuscated Files or Information: Command Obfuscation 1 TTPs

    Adversaries may obfuscate content during command execution to impede detection.

  • UPX packed file 11 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 53 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0624a3641140b1e609f181854519fa328dd04132f29d30da4eccca73e777f867.exe
    "C:\Users\Admin\AppData\Local\Temp\0624a3641140b1e609f181854519fa328dd04132f29d30da4eccca73e777f867.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2428
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGQAYQBjACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAHkAdgBkACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAGoAaQBrACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAG0AdQBmACMAPgA="
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2300
    • C:\Users\Admin\AppData\Local\Temp\server.exe
      "C:\Users\Admin\AppData\Local\Temp\server.exe"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious use of FindShellTrayWindow
      PID:2176
    • C:\Users\Admin\AppData\Local\Temp\test3.exe
      "C:\Users\Admin\AppData\Local\Temp\test3.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:4416
    • C:\Users\Admin\AppData\Local\Temp\test.exe
      "C:\Users\Admin\AppData\Local\Temp\test.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Checks computer location settings
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3092
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\test.exe" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1812
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\test.exe" +s +h
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:380
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3464
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:4540
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        3⤵
        • Windows security bypass
        • Executes dropped EXE
        • Windows security modification
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1056
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3440

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_alo4jg2l.t00.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\server.exe

    Filesize

    159KB

    MD5

    0e660b30cdd6af759d3f9bf8e570a125

    SHA1

    f23d8f22ebaeee3b11983d7fd2803cc2c3955fd2

    SHA256

    300a6ae4e7f47e9045949851a959c0f6033d06a407a710c769ef4f0361b3a1d2

    SHA512

    f88977adb9f8315690902504b1f80528294bad7dbc5362900b4771db76602325b4888df599d652608b2dbfc540a7c8d3d1fc868b86542aa6f39b6f3c53bf1c68

  • C:\Users\Admin\AppData\Local\Temp\test.exe

    Filesize

    349KB

    MD5

    1fe0b8aa29f9146f20034ea25a9de0f7

    SHA1

    e39dfaf4ebfcb2d9f3304288915cc3b0cb04cbb8

    SHA256

    450d5092c67ae98f01cc40c5ebadb16b7740c7459eba002bcdf9d3e56ccab337

    SHA512

    b69066a1bac7ddf91719503e41f2bd823d617646c140c52ea930d61a6990ee99fb02de5802b2797cb88c984a235422f5bdf2922db548c37f9e146c75997c154b

  • C:\Users\Admin\AppData\Local\Temp\test3.exe

    Filesize

    168KB

    MD5

    3ddeaa6023c5b94e2273e53b65919c24

    SHA1

    0f2fe2f4c678ce8c461e9638607ffc2b2c65ce8b

    SHA256

    4f64157060de47971225f0762f1ebf16d6e70bbd5bf98fa7d14c6d3167e00728

    SHA512

    91ea7f7f55e9e616946e079e98501b1bec07e52ae0be41fd3d59b41a35cc573949205c9bb5cd35915d7b2abf5f15e50b9d2f5ee8c94c73fbf024d02c4c6b0de8

  • memory/1056-166-0x0000000000400000-0x00000000004E8000-memory.dmp

    Filesize

    928KB

  • memory/1056-186-0x0000000000400000-0x00000000004E8000-memory.dmp

    Filesize

    928KB

  • memory/1056-122-0x0000000000400000-0x00000000004E8000-memory.dmp

    Filesize

    928KB

  • memory/1056-191-0x0000000000400000-0x00000000004E8000-memory.dmp

    Filesize

    928KB

  • memory/1056-181-0x0000000000400000-0x00000000004E8000-memory.dmp

    Filesize

    928KB

  • memory/1056-161-0x0000000000400000-0x00000000004E8000-memory.dmp

    Filesize

    928KB

  • memory/1056-171-0x0000000000400000-0x00000000004E8000-memory.dmp

    Filesize

    928KB

  • memory/1056-176-0x0000000000400000-0x00000000004E8000-memory.dmp

    Filesize

    928KB

  • memory/2176-45-0x000000001C890000-0x000000001C8DC000-memory.dmp

    Filesize

    304KB

  • memory/2176-41-0x00000000015D0000-0x00000000015D8000-memory.dmp

    Filesize

    32KB

  • memory/2176-44-0x00007FFE5C0B0000-0x00007FFE5CA51000-memory.dmp

    Filesize

    9.6MB

  • memory/2176-31-0x000000001BBD0000-0x000000001BC76000-memory.dmp

    Filesize

    664KB

  • memory/2176-40-0x00007FFE5C0B0000-0x00007FFE5CA51000-memory.dmp

    Filesize

    9.6MB

  • memory/2176-46-0x00007FFE5C0B0000-0x00007FFE5CA51000-memory.dmp

    Filesize

    9.6MB

  • memory/2176-157-0x00007FFE5C0B0000-0x00007FFE5CA51000-memory.dmp

    Filesize

    9.6MB

  • memory/2176-126-0x000000001F3D0000-0x000000001F6DE000-memory.dmp

    Filesize

    3.1MB

  • memory/2176-34-0x000000001C730000-0x000000001C7CC000-memory.dmp

    Filesize

    624KB

  • memory/2176-33-0x000000001C150000-0x000000001C61E000-memory.dmp

    Filesize

    4.8MB

  • memory/2300-124-0x0000000006450000-0x000000000646E000-memory.dmp

    Filesize

    120KB

  • memory/2300-146-0x0000000007970000-0x0000000007981000-memory.dmp

    Filesize

    68KB

  • memory/2300-38-0x0000000004ED0000-0x0000000004F06000-memory.dmp

    Filesize

    216KB

  • memory/2300-104-0x0000000005CB0000-0x0000000005CD2000-memory.dmp

    Filesize

    136KB

  • memory/2300-125-0x0000000006480000-0x00000000064CC000-memory.dmp

    Filesize

    304KB

  • memory/2300-105-0x0000000005D50000-0x0000000005DB6000-memory.dmp

    Filesize

    408KB

  • memory/2300-43-0x0000000005540000-0x0000000005B68000-memory.dmp

    Filesize

    6.2MB

  • memory/2300-129-0x0000000006A10000-0x0000000006A42000-memory.dmp

    Filesize

    200KB

  • memory/2300-140-0x0000000006A70000-0x0000000006A8E000-memory.dmp

    Filesize

    120KB

  • memory/2300-130-0x000000006EF10000-0x000000006EF5C000-memory.dmp

    Filesize

    304KB

  • memory/2300-141-0x0000000007440000-0x00000000074E3000-memory.dmp

    Filesize

    652KB

  • memory/2300-142-0x0000000007DC0000-0x000000000843A000-memory.dmp

    Filesize

    6.5MB

  • memory/2300-143-0x0000000007770000-0x000000000778A000-memory.dmp

    Filesize

    104KB

  • memory/2300-144-0x0000000007800000-0x000000000780A000-memory.dmp

    Filesize

    40KB

  • memory/2300-145-0x00000000079F0000-0x0000000007A86000-memory.dmp

    Filesize

    600KB

  • memory/2300-108-0x0000000005EA0000-0x00000000061F4000-memory.dmp

    Filesize

    3.3MB

  • memory/2300-147-0x00000000079B0000-0x00000000079BE000-memory.dmp

    Filesize

    56KB

  • memory/2300-148-0x00000000079C0000-0x00000000079D4000-memory.dmp

    Filesize

    80KB

  • memory/2300-149-0x0000000007AB0000-0x0000000007ACA000-memory.dmp

    Filesize

    104KB

  • memory/2300-150-0x0000000007A90000-0x0000000007A98000-memory.dmp

    Filesize

    32KB

  • memory/2300-106-0x0000000005E30000-0x0000000005E96000-memory.dmp

    Filesize

    408KB

  • memory/3092-47-0x0000000000400000-0x00000000004E8000-memory.dmp

    Filesize

    928KB

  • memory/3092-128-0x0000000000400000-0x00000000004E8000-memory.dmp

    Filesize

    928KB

  • memory/3440-123-0x0000000000B50000-0x0000000000B51000-memory.dmp

    Filesize

    4KB

  • memory/4416-156-0x00007FFE5C0B0000-0x00007FFE5CA51000-memory.dmp

    Filesize

    9.6MB

  • memory/4416-155-0x00007FFE5C365000-0x00007FFE5C366000-memory.dmp

    Filesize

    4KB

  • memory/4416-160-0x00007FFE5C0B0000-0x00007FFE5CA51000-memory.dmp

    Filesize

    9.6MB

  • memory/4416-96-0x000000001CDE0000-0x000000001CE42000-memory.dmp

    Filesize

    392KB

  • memory/4416-97-0x00007FFE5C0B0000-0x00007FFE5CA51000-memory.dmp

    Filesize

    9.6MB

  • memory/4416-32-0x00007FFE5C0B0000-0x00007FFE5CA51000-memory.dmp

    Filesize

    9.6MB

  • memory/4416-22-0x00007FFE5C365000-0x00007FFE5C366000-memory.dmp

    Filesize

    4KB