Analysis

  • max time kernel
    94s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250217-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/02/2025, 21:30

General

  • Target

    JaffaCakes118_2fa2de66b1ca550b11513f0cb325e8e0.exe

  • Size

    780KB

  • MD5

    2fa2de66b1ca550b11513f0cb325e8e0

  • SHA1

    8ecbfa853696eb382744d311cd353a6bf2d2f483

  • SHA256

    9f80f443cc464de6d17678e94e25cede1218568b75a2e89a0278b766fb07f37a

  • SHA512

    86391843d66dd56d35b2eee5e43e02bdc0162d23c61e79b344888cfa41c1ffb8a62f00ff04ec7e59a3eb4c380c1b3d8cda1838b12dda9abe955558bb658bbaa7

  • SSDEEP

    12288:rxa6q6jnieErDHrlWUQ6AkGtTRj9SIu78iBoE7UYVlda:rxrxie67BWeAkqyn83LYVlda

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

192.168.1.2:1604

Mutex

DC_MUTEX-8F7010S

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    a5S5MyDcHw4d

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    System32dll

rc4.plain

Signatures

  • Darkcomet

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

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • 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
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Program crash 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2fa2de66b1ca550b11513f0cb325e8e0.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2fa2de66b1ca550b11513f0cb325e8e0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1084
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2fa2de66b1ca550b11513f0cb325e8e0.exe
      C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2fa2de66b1ca550b11513f0cb325e8e0.exe
      2⤵
      • Modifies WinLogon for persistence
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2052
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2fa2de66b1ca550b11513f0cb325e8e0.exe" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1312
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2fa2de66b1ca550b11513f0cb325e8e0.exe" +s +h
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:5016
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3708
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:4520
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • Deletes itself
        • System Location Discovery: System Language Discovery
        PID:4348
      • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
        "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4780
        • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
          C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1968
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
            5⤵
            • Drops file in Program Files directory
            PID:2324
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 224
              6⤵
              • Program crash
              PID:3308
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2324 -ip 2324
    1⤵
      PID:2072

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      780KB

      MD5

      2fa2de66b1ca550b11513f0cb325e8e0

      SHA1

      8ecbfa853696eb382744d311cd353a6bf2d2f483

      SHA256

      9f80f443cc464de6d17678e94e25cede1218568b75a2e89a0278b766fb07f37a

      SHA512

      86391843d66dd56d35b2eee5e43e02bdc0162d23c61e79b344888cfa41c1ffb8a62f00ff04ec7e59a3eb4c380c1b3d8cda1838b12dda9abe955558bb658bbaa7

    • memory/1084-0-0x00000000001D0000-0x00000000001D4000-memory.dmp

      Filesize

      16KB

    • memory/1968-76-0x0000000000400000-0x00000000004BD000-memory.dmp

      Filesize

      756KB

    • memory/1968-74-0x0000000000400000-0x00000000004BD000-memory.dmp

      Filesize

      756KB

    • memory/1968-73-0x0000000000400000-0x00000000004BD000-memory.dmp

      Filesize

      756KB

    • memory/2052-3-0x0000000000400000-0x00000000004BD000-memory.dmp

      Filesize

      756KB

    • memory/2052-5-0x0000000000400000-0x00000000004BD000-memory.dmp

      Filesize

      756KB

    • memory/2052-69-0x0000000000400000-0x00000000004BD000-memory.dmp

      Filesize

      756KB

    • memory/2052-4-0x0000000000400000-0x00000000004BD000-memory.dmp

      Filesize

      756KB

    • memory/2052-2-0x0000000000400000-0x00000000004BD000-memory.dmp

      Filesize

      756KB

    • memory/2052-1-0x0000000000400000-0x00000000004BD000-memory.dmp

      Filesize

      756KB

    • memory/2324-75-0x0000000000400000-0x00000000004C4000-memory.dmp

      Filesize

      784KB

    • memory/4348-8-0x0000000000720000-0x0000000000721000-memory.dmp

      Filesize

      4KB