Analysis

  • max time kernel
    191s
  • max time network
    213s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-11-2022 22:07

General

  • Target

    939f5f385c855cb98c481ae373ea9efe7af50f1714adf47fc01a288488abe5c8.exe

  • Size

    997KB

  • MD5

    cc1439d43a95d8834e593a20b082ef24

  • SHA1

    5cd14499b0b902bad969d39ab28b1e9efe0d9354

  • SHA256

    939f5f385c855cb98c481ae373ea9efe7af50f1714adf47fc01a288488abe5c8

  • SHA512

    a7c4a8ef7bf9b52cb8db3b3557a2e72e20b1fedc95d69895a6872979062dd90639771be6da3758f49b0d528a87fc3bddbe8db1940725231926ac8a34edc662d0

  • SSDEEP

    24576:FbcOE7O5ueXGqJghIL2AYS3ymFYe9eQxX4P:hcs5tbL4beLG

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

neo2.ddns.net:1200

Mutex

DC_MUTEX-0WZBGJC

Attributes
  • InstallPath

    SystemC\SystemC.exe

  • gencode

    qMq25piLPy1w

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    SystemC

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 53 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\939f5f385c855cb98c481ae373ea9efe7af50f1714adf47fc01a288488abe5c8.exe
    "C:\Users\Admin\AppData\Local\Temp\939f5f385c855cb98c481ae373ea9efe7af50f1714adf47fc01a288488abe5c8.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4048
    • C:\Users\Admin\AppData\Local\Temp\939f5f385c855cb98c481ae373ea9efe7af50f1714adf47fc01a288488abe5c8.exe
      C:\Users\Admin\AppData\Local\Temp\939f5f385c855cb98c481ae373ea9efe7af50f1714adf47fc01a288488abe5c8.exe
      2⤵
      • Modifies WinLogon for persistence
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4992
      • C:\Users\Admin\AppData\Roaming\SystemC\SystemC.exe
        "C:\Users\Admin\AppData\Roaming\SystemC\SystemC.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2712
        • C:\Users\Admin\AppData\Roaming\SystemC\SystemC.exe
          C:\Users\Admin\AppData\Roaming\SystemC\SystemC.exe
          4⤵
          • Modifies firewall policy service
          • Modifies security service
          • Windows security bypass
          • Executes dropped EXE
          • Windows security modification
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          • System policy modification
          PID:2160
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
              PID:4936

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Modify Existing Service

    2
    T1031

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    7
    T1112

    Disabling Security Tools

    2
    T1089

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    2
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\SystemC\SystemC.exe
      Filesize

      997KB

      MD5

      cc1439d43a95d8834e593a20b082ef24

      SHA1

      5cd14499b0b902bad969d39ab28b1e9efe0d9354

      SHA256

      939f5f385c855cb98c481ae373ea9efe7af50f1714adf47fc01a288488abe5c8

      SHA512

      a7c4a8ef7bf9b52cb8db3b3557a2e72e20b1fedc95d69895a6872979062dd90639771be6da3758f49b0d528a87fc3bddbe8db1940725231926ac8a34edc662d0

    • C:\Users\Admin\AppData\Roaming\SystemC\SystemC.exe
      Filesize

      997KB

      MD5

      cc1439d43a95d8834e593a20b082ef24

      SHA1

      5cd14499b0b902bad969d39ab28b1e9efe0d9354

      SHA256

      939f5f385c855cb98c481ae373ea9efe7af50f1714adf47fc01a288488abe5c8

      SHA512

      a7c4a8ef7bf9b52cb8db3b3557a2e72e20b1fedc95d69895a6872979062dd90639771be6da3758f49b0d528a87fc3bddbe8db1940725231926ac8a34edc662d0

    • C:\Users\Admin\AppData\Roaming\SystemC\SystemC.exe
      Filesize

      997KB

      MD5

      cc1439d43a95d8834e593a20b082ef24

      SHA1

      5cd14499b0b902bad969d39ab28b1e9efe0d9354

      SHA256

      939f5f385c855cb98c481ae373ea9efe7af50f1714adf47fc01a288488abe5c8

      SHA512

      a7c4a8ef7bf9b52cb8db3b3557a2e72e20b1fedc95d69895a6872979062dd90639771be6da3758f49b0d528a87fc3bddbe8db1940725231926ac8a34edc662d0

    • memory/2160-151-0x0000000000400000-0x00000000004BA000-memory.dmp
      Filesize

      744KB

    • memory/2160-149-0x0000000000400000-0x00000000004BA000-memory.dmp
      Filesize

      744KB

    • memory/2160-142-0x0000000000000000-mapping.dmp
    • memory/2712-147-0x0000000071D20000-0x00000000722D1000-memory.dmp
      Filesize

      5.7MB

    • memory/2712-139-0x0000000000000000-mapping.dmp
    • memory/4048-137-0x0000000074CE0000-0x0000000075291000-memory.dmp
      Filesize

      5.7MB

    • memory/4048-132-0x0000000074CE0000-0x0000000075291000-memory.dmp
      Filesize

      5.7MB

    • memory/4936-148-0x0000000000000000-mapping.dmp
    • memory/4992-138-0x0000000000400000-0x00000000004BA000-memory.dmp
      Filesize

      744KB

    • memory/4992-136-0x0000000000400000-0x00000000004BA000-memory.dmp
      Filesize

      744KB

    • memory/4992-135-0x0000000000400000-0x00000000004BA000-memory.dmp
      Filesize

      744KB

    • memory/4992-134-0x0000000000400000-0x00000000004BA000-memory.dmp
      Filesize

      744KB

    • memory/4992-150-0x0000000000400000-0x00000000004BA000-memory.dmp
      Filesize

      744KB

    • memory/4992-133-0x0000000000000000-mapping.dmp