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Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/10/2022, 19:14

General

  • Target

    bdce122320dd4dcbf31e169609b231cd1cf6de1bd6286cc3b75738bfbd1a6d55.exe

  • Size

    915KB

  • MD5

    81d66a2e08aaf9b51a82b734b86c9e80

  • SHA1

    48e5d46a6c5b95e1be88fa7a175a9d32358ec1dc

  • SHA256

    bdce122320dd4dcbf31e169609b231cd1cf6de1bd6286cc3b75738bfbd1a6d55

  • SHA512

    46c21077a8fe9523038c64e0c5aa85a801299ac809b771237a111becf4acbfaaa7ce6a45668bdeafa9949b34dccbc19424258c739334e3a7418b620ba1eb272d

  • SSDEEP

    24576:5N1fAXro36rn7cdkr+HBYKMUkM0m+UaPtS:HqXrFLgyaqKHkhm+PPt

Malware Config

Extracted

Family

darkcomet

Botnet

WIFE-US

C2

127.0.0.1:1604

linep.no-ip.org:1604

Mutex

DC_MUTEX-AMR7Z0X

Attributes
  • gencode

    WDR3l3d5DWC1

  • install

    false

  • offline_keylogger

    true

  • persistence

    false

Signatures

  • Darkcomet

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

  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 1 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 26 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bdce122320dd4dcbf31e169609b231cd1cf6de1bd6286cc3b75738bfbd1a6d55.exe
    "C:\Users\Admin\AppData\Local\Temp\bdce122320dd4dcbf31e169609b231cd1cf6de1bd6286cc3b75738bfbd1a6d55.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4868
    • C:\ProgramData\UserLayout.exe
      C:\ProgramData\UserLayout.exe
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Drops startup file
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1668
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce" /f /v "UserLayout.exe" /t REG_SZ /d "C:\ProgramData\UserLayout.exe" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4048
        • C:\Windows\SysWOW64\reg.exe
          reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce" /f /v "UserLayout.exe" /t REG_SZ /d "C:\ProgramData\UserLayout.exe"
          4⤵
          • Adds Run key to start application
          PID:2880
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:3492

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\ProgramData\UserLayout.exe

    Filesize

    915KB

    MD5

    81d66a2e08aaf9b51a82b734b86c9e80

    SHA1

    48e5d46a6c5b95e1be88fa7a175a9d32358ec1dc

    SHA256

    bdce122320dd4dcbf31e169609b231cd1cf6de1bd6286cc3b75738bfbd1a6d55

    SHA512

    46c21077a8fe9523038c64e0c5aa85a801299ac809b771237a111becf4acbfaaa7ce6a45668bdeafa9949b34dccbc19424258c739334e3a7418b620ba1eb272d

  • C:\ProgramData\UserLayout.exe

    Filesize

    915KB

    MD5

    81d66a2e08aaf9b51a82b734b86c9e80

    SHA1

    48e5d46a6c5b95e1be88fa7a175a9d32358ec1dc

    SHA256

    bdce122320dd4dcbf31e169609b231cd1cf6de1bd6286cc3b75738bfbd1a6d55

    SHA512

    46c21077a8fe9523038c64e0c5aa85a801299ac809b771237a111becf4acbfaaa7ce6a45668bdeafa9949b34dccbc19424258c739334e3a7418b620ba1eb272d

  • memory/1668-146-0x0000000074890000-0x0000000074E41000-memory.dmp

    Filesize

    5.7MB

  • memory/1668-137-0x0000000074890000-0x0000000074E41000-memory.dmp

    Filesize

    5.7MB

  • memory/3492-141-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/3492-142-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/3492-144-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/3492-145-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/3492-147-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/4868-132-0x0000000074890000-0x0000000074E41000-memory.dmp

    Filesize

    5.7MB

  • memory/4868-138-0x0000000074890000-0x0000000074E41000-memory.dmp

    Filesize

    5.7MB

  • memory/4868-133-0x0000000074890000-0x0000000074E41000-memory.dmp

    Filesize

    5.7MB