Resubmissions

26-09-2024 06:42

240926-hgnp9ashkk 10

25-09-2024 16:40

240925-t6kwfayfph 10

Analysis

  • max time kernel
    140s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-09-2024 16:40

General

  • Target

    bazaar.2020.02/Backdoor.Win32.DarkKomet.exe

  • Size

    251KB

  • MD5

    b7b88850bc66c349bc02f81a3b443f39

  • SHA1

    4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0

  • SHA256

    4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5

  • SHA512

    47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282

  • SSDEEP

    6144:QcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37:QcW7KEZlPzCy37

Malware Config

Extracted

Family

darkcomet

Botnet

hacked

C2

sexystar.myq-see.com:5552

Mutex

DC_MUTEX-6BSXQXU

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    1JlJEAuNqqm6

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

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

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • UPX packed file 8 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 2 IoCs

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

  • 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\bazaar.2020.02\Backdoor.Win32.DarkKomet.exe
    "C:\Users\Admin\AppData\Local\Temp\bazaar.2020.02\Backdoor.Win32.DarkKomet.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4876
    • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
      "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2616

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

    Filesize

    251KB

    MD5

    b7b88850bc66c349bc02f81a3b443f39

    SHA1

    4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0

    SHA256

    4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5

    SHA512

    47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282

  • memory/2616-14-0x0000000002700000-0x0000000002701000-memory.dmp

    Filesize

    4KB

  • memory/2616-16-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2616-19-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2616-21-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2616-23-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2616-25-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4876-0-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4876-1-0x0000000002400000-0x0000000002401000-memory.dmp

    Filesize

    4KB

  • memory/4876-15-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB