Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250217-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/02/2025, 03:08

General

  • Target

    JaffaCakes118_0fda07a5e12bc40737255ba3f4379cdd.exe

  • Size

    693KB

  • MD5

    0fda07a5e12bc40737255ba3f4379cdd

  • SHA1

    177c003d406218129dd9e6c93286e1b5db31dad1

  • SHA256

    9218a75e1f0d8780c12a2c5061068aa8f2c0a865d62ea7da21bb91518d2cce39

  • SHA512

    aff66eb37ca1f36b93136fb59c517410c7d23addae86d2c2d09be3bf1e6856d3a153854c7a757fef879be023ac63b669abf4156ef3bce65fc3ebb8c871e8b307

  • SSDEEP

    12288:aZeEFQ4KHeyDuP+xQV1K0eNnG+8tAVAO2BQgeMCDvRdPQGUDBo/:aXzKLF01teNIAZeQgeM4FQGgy

Malware Config

Extracted

Family

darkcomet

Botnet

Rs

C2

leetrsps.zapto.org:82

Mutex

DC_MUTEX-CCF7AKB

Attributes
  • InstallPath

    Windows Update\winupdate.exe

  • gencode

    h%c=94/%UYNd

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

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
  • Modifies firewall policy service 3 TTPs 3 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Checks processor information in registry 2 TTPs 8 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 59 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0fda07a5e12bc40737255ba3f4379cdd.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0fda07a5e12bc40737255ba3f4379cdd.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1020
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0fda07a5e12bc40737255ba3f4379cdd.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0fda07a5e12bc40737255ba3f4379cdd.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Checks BIOS information in registry
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Checks processor information in registry
      • Enumerates system info in registry
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3668
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
          PID:728
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 728 -s 76
            4⤵
            • Program crash
            PID:1152
        • C:\Windows\SysWOW64\explorer.exe
          "C:\Windows\SysWOW64\explorer.exe"
          3⤵
            PID:2860
          • C:\Users\Admin\AppData\Roaming\Windows Update\winupdate.exe
            "C:\Users\Admin\AppData\Roaming\Windows Update\winupdate.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:3656
            • C:\Users\Admin\AppData\Roaming\Windows Update\winupdate.exe
              "C:\Users\Admin\AppData\Roaming\Windows Update\winupdate.exe"
              4⤵
              • Modifies firewall policy service
              • Modifies security service
              • Windows security bypass
              • Checks BIOS information in registry
              • Executes dropped EXE
              • Windows security modification
              • System Location Discovery: System Language Discovery
              • Checks processor information in registry
              • Enumerates system info in registry
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              • System policy modification
              PID:3032
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 728 -ip 728
        1⤵
          PID:2380

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Roaming\Windows Update\winupdate.exe

          Filesize

          693KB

          MD5

          0fda07a5e12bc40737255ba3f4379cdd

          SHA1

          177c003d406218129dd9e6c93286e1b5db31dad1

          SHA256

          9218a75e1f0d8780c12a2c5061068aa8f2c0a865d62ea7da21bb91518d2cce39

          SHA512

          aff66eb37ca1f36b93136fb59c517410c7d23addae86d2c2d09be3bf1e6856d3a153854c7a757fef879be023ac63b669abf4156ef3bce65fc3ebb8c871e8b307

        • memory/728-6-0x0000000000A20000-0x0000000000A21000-memory.dmp

          Filesize

          4KB

        • memory/2860-9-0x0000000000400000-0x000000000040C000-memory.dmp

          Filesize

          48KB

        • memory/2860-79-0x0000000000400000-0x000000000040C000-memory.dmp

          Filesize

          48KB

        • memory/2860-11-0x0000000000400000-0x000000000040C000-memory.dmp

          Filesize

          48KB

        • memory/2860-10-0x0000000000400000-0x000000000040C000-memory.dmp

          Filesize

          48KB

        • memory/2860-8-0x0000000000400000-0x000000000040C000-memory.dmp

          Filesize

          48KB

        • memory/3032-75-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB

        • memory/3032-74-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB

        • memory/3032-78-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB

        • memory/3032-77-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB

        • memory/3032-76-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB

        • memory/3032-81-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB

        • memory/3668-4-0x0000000000DA0000-0x0000000000DA1000-memory.dmp

          Filesize

          4KB

        • memory/3668-3-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB

        • memory/3668-2-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB

        • memory/3668-70-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB

        • memory/3668-0-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB

        • memory/3668-1-0x0000000013140000-0x00000000131F6000-memory.dmp

          Filesize

          728KB