Analysis

  • max time kernel
    100s
  • max time network
    167s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-10-2022 09:18

General

  • Target

    4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe

  • Size

    658KB

  • MD5

    5a85fd1683296db08ee44b7753884fe0

  • SHA1

    52507f56324779b590e74aa288181016c1e1c7d0

  • SHA256

    4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88

  • SHA512

    38dce9afca9a4edefcbce8952b65086576933287795c1311c8eda266c4ead34ad3762a4151735630739daab2162021f1664c741c93c8773d35e7b03d7ce0bbab

  • SSDEEP

    12288:y9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hK:eZ1xuVVjfFoynPaVBUR8f+kN10EB4

Malware Config

Extracted

Family

darkcomet

Botnet

loy

C2

2.185.7.134:100

Mutex

DCMIN_MUTEX-W2NJ681

Attributes
  • InstallPath

    DCSCMIN\Realtek Audio Manager.exe

  • gencode

    4kdoGSd38syN

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    Realtek Audio Manager

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe
    "C:\Users\Admin\AppData\Local\Temp\4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4248
    • C:\Users\Admin\AppData\Local\Temp\DCSCMIN\Realtek Audio Manager.exe
      "C:\Users\Admin\AppData\Local\Temp\DCSCMIN\Realtek Audio Manager.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:368

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\DCSCMIN\Realtek Audio Manager.exe

    Filesize

    658KB

    MD5

    5a85fd1683296db08ee44b7753884fe0

    SHA1

    52507f56324779b590e74aa288181016c1e1c7d0

    SHA256

    4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88

    SHA512

    38dce9afca9a4edefcbce8952b65086576933287795c1311c8eda266c4ead34ad3762a4151735630739daab2162021f1664c741c93c8773d35e7b03d7ce0bbab

  • C:\Users\Admin\AppData\Local\Temp\DCSCMIN\Realtek Audio Manager.exe

    Filesize

    658KB

    MD5

    5a85fd1683296db08ee44b7753884fe0

    SHA1

    52507f56324779b590e74aa288181016c1e1c7d0

    SHA256

    4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88

    SHA512

    38dce9afca9a4edefcbce8952b65086576933287795c1311c8eda266c4ead34ad3762a4151735630739daab2162021f1664c741c93c8773d35e7b03d7ce0bbab

  • memory/368-132-0x0000000000000000-mapping.dmp