Analysis

  • max time kernel
    150s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240704-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-07-2024 05:24

General

  • Target

    f1d61cbcda0b9784bb33b45d96f98b3e027a6b5cfe89552e47d15038dedff23d.exe

  • Size

    1.0MB

  • MD5

    766a48198b5f332debc69cf1e0e87bbf

  • SHA1

    d805b0ee573788f94375d87b2d8af5a3f56e6ef4

  • SHA256

    f1d61cbcda0b9784bb33b45d96f98b3e027a6b5cfe89552e47d15038dedff23d

  • SHA512

    5ae3a2e7af67b20b16a9f4f077449074b3d63ae24108027bc2bded3eecc4cebb1f225ef0c96dca24f736c51867f96878bb18c8f08d4bb6b0729b75724102c749

  • SSDEEP

    24576:MKiRzC0UAaNSl3Jx5/16qCTF6RQHDO1AZ8S:NiRnMSp5N6PTfi1AZ8S

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

127.0.0.1:555

Mutex

DC_MUTEX-13GPHC5

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    ACocCp43TdEV

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • 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
  • Modifies firewall policy service 3 TTPs 3 IoCs
  • r77

    r77 is an open-source, userland rootkit.

  • r77 rootkit payload 1 IoCs

    Detects the payload of the r77 rootkit.

  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • UPX packed file 18 IoCs

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

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

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f1d61cbcda0b9784bb33b45d96f98b3e027a6b5cfe89552e47d15038dedff23d.exe
    "C:\Users\Admin\AppData\Local\Temp\f1d61cbcda0b9784bb33b45d96f98b3e027a6b5cfe89552e47d15038dedff23d.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:1708
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\f1d61cbcda0b9784bb33b45d96f98b3e027a6b5cfe89552e47d15038dedff23d.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3688
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\f1d61cbcda0b9784bb33b45d96f98b3e027a6b5cfe89552e47d15038dedff23d.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1132
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4064
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:4644
    • C:\Users\Admin\AppData\Local\Temp\CYBERPUNK 2077 V1.03-V1.5 PLUS 32 TRAINER.EXE
      "C:\Users\Admin\AppData\Local\Temp\CYBERPUNK 2077 V1.03-V1.5 PLUS 32 TRAINER.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3804
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
      • Deletes itself
      PID:1156
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies firewall policy service
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:216
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
          PID:4220

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\FLiNGTrainer\TrainerSettings.ini

      Filesize

      29B

      MD5

      100ad43a6e39d44013fad7f3aa343e3b

      SHA1

      dc8050bdee8a74354cb4a2057e4e703e7a460943

      SHA256

      a7b15ee77dd0db946e7fdbf574889bd30c23fa3d7bff6d509df118595ee14ec5

      SHA512

      20f9b26416804f917d0642d35de32ccae0849c34bff4eb75c6450b1ee83756f3275850101d7482eb59c78356b1489c2d4db6cd95ae9b72b64d5eeab700d36ba8

    • C:\Users\Admin\AppData\Local\Temp\CYBERPUNK 2077 V1.03-V1.5 PLUS 32 TRAINER.EXE

      Filesize

      1.4MB

      MD5

      fe94c9259ac762233bf198684cf322b6

      SHA1

      a07a7d3a357fa600454dec4f666a556f61fdfb31

      SHA256

      e783e443dea1898fb87cbf0fedf713afdf38947b9677c2a428fd8e02e725f297

      SHA512

      037e6e7a3954a97068749a1570daf7f3b1e43cabd02b867a2261976e07b44228e3ba52de39a42985d12f672523bae0aef92b92be8a440c8ddaef94f9bf833eb3

    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

      Filesize

      1.0MB

      MD5

      766a48198b5f332debc69cf1e0e87bbf

      SHA1

      d805b0ee573788f94375d87b2d8af5a3f56e6ef4

      SHA256

      f1d61cbcda0b9784bb33b45d96f98b3e027a6b5cfe89552e47d15038dedff23d

      SHA512

      5ae3a2e7af67b20b16a9f4f077449074b3d63ae24108027bc2bded3eecc4cebb1f225ef0c96dca24f736c51867f96878bb18c8f08d4bb6b0729b75724102c749

    • memory/216-58-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-62-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-57-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-67-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-66-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-65-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-31-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-64-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-56-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-60-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-50-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-51-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-63-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-59-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/216-61-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/1156-18-0x0000000000230000-0x0000000000231000-memory.dmp

      Filesize

      4KB

    • memory/1708-1-0x0000000000C60000-0x0000000000C61000-memory.dmp

      Filesize

      4KB

    • memory/1708-33-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/1708-0-0x0000000000400000-0x0000000000621000-memory.dmp

      Filesize

      2.1MB

    • memory/3804-32-0x000002A34E6A0000-0x000002A34E6B0000-memory.dmp

      Filesize

      64KB

    • memory/3804-55-0x000002A34E6A0000-0x000002A34E6B0000-memory.dmp

      Filesize

      64KB

    • memory/3804-54-0x00007FFB01BA0000-0x00007FFB02661000-memory.dmp

      Filesize

      10.8MB

    • memory/3804-53-0x00007FFB01BA0000-0x00007FFB02661000-memory.dmp

      Filesize

      10.8MB

    • memory/3804-52-0x00007FFB01BA3000-0x00007FFB01BA5000-memory.dmp

      Filesize

      8KB

    • memory/3804-16-0x00007FFB01BA3000-0x00007FFB01BA5000-memory.dmp

      Filesize

      8KB

    • memory/3804-30-0x00007FFB01BA0000-0x00007FFB02661000-memory.dmp

      Filesize

      10.8MB

    • memory/3804-17-0x000002A34E630000-0x000002A34E66E000-memory.dmp

      Filesize

      248KB

    • memory/4220-29-0x0000000000C30000-0x0000000000C31000-memory.dmp

      Filesize

      4KB