Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-01-2025 03:21

General

  • Target

    JaffaCakes118_775098a7a37f647bfd8e1f939d8771df.exe

  • Size

    333KB

  • MD5

    775098a7a37f647bfd8e1f939d8771df

  • SHA1

    4c5147d5d16c3cd1d9b790f07d06084807cb14af

  • SHA256

    c88f8c13f73d0ee32d0b3a83fce6a383e74234d2ae7fa58bae07cacf0946ff4a

  • SHA512

    b34dea42013c8318b64075332d7a2f8b46f9609ffb759aa659ba2b9f1edc473940e973616ea2e406680920d2750718cc47ae8825a600e2b02505ba8932476b3d

  • SSDEEP

    6144:4iEoiNcdTzZrcxrHHTMXcqEjSrKmwToZ5n:LPiKdTtrYDHTaFmBK

Malware Config

Extracted

Family

darkcomet

Botnet

Genesis999

C2

ipkiller.zapto.org:100

Mutex

DC-HUMVLEETPWP94P

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    9JpvAVQtk01b

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables Task Manager via registry modification
  • Checks computer location settings 2 TTPs 3 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
  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 5 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 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 2 IoCs
  • Modifies registry key 1 TTPs 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 26 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_775098a7a37f647bfd8e1f939d8771df.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_775098a7a37f647bfd8e1f939d8771df.exe"
    1⤵
    • Disables RegEdit via registry modification
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1404
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_775098a7a37f647bfd8e1f939d8771df.exe
      C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_775098a7a37f647bfd8e1f939d8771df.exe
      2⤵
      • 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:3764
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        3⤵
        • Disables RegEdit via registry modification
        • Checks computer location settings
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4088
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          4⤵
            PID:2096
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\XoymS.vbs"
            4⤵
            • System Location Discovery: System Language Discovery
            PID:5040
          • C:\Windows\SysWOW64\REG.exe
            REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoControlPanel /t REG_DWORD /d 0 /f
            4⤵
            • System Location Discovery: System Language Discovery
            • Modifies registry key
            PID:2648
          • C:\Windows\SysWOW64\REG.exe
            REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoRun /t REG_DWORD /d 1 /f
            4⤵
            • System Location Discovery: System Language Discovery
            • Modifies registry key
            PID:3228
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\XoymS.vbs"
        2⤵
        • System Location Discovery: System Language Discovery
        PID:2456
      • C:\Windows\SysWOW64\REG.exe
        REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoControlPanel /t REG_DWORD /d 0 /f
        2⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:3736
      • C:\Windows\SysWOW64\REG.exe
        REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoRun /t REG_DWORD /d 1 /f
        2⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:2988

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\XoymS.vbs

      Filesize

      405B

      MD5

      3f15ac4f6dfba7f653788de5b9101ebc

      SHA1

      4ef9e50ba823249e50df563e5fdfaaf4e13ad041

      SHA256

      3bde2f11a96ee13e4b2cf06f1728730d8163b71d011dc9beb1bf0d659220b37b

      SHA512

      6ef0b58f301b76dff08c89c4af2fddc87689c0744ab59f81e0ad7294df1bd331ad400800cfbe21727527b3415f0a6b6be0cf54daa00368fd48e59d59859df8c0

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

      Filesize

      333KB

      MD5

      775098a7a37f647bfd8e1f939d8771df

      SHA1

      4c5147d5d16c3cd1d9b790f07d06084807cb14af

      SHA256

      c88f8c13f73d0ee32d0b3a83fce6a383e74234d2ae7fa58bae07cacf0946ff4a

      SHA512

      b34dea42013c8318b64075332d7a2f8b46f9609ffb759aa659ba2b9f1edc473940e973616ea2e406680920d2750718cc47ae8825a600e2b02505ba8932476b3d

    • memory/1404-1-0x0000000075370000-0x0000000075921000-memory.dmp

      Filesize

      5.7MB

    • memory/1404-2-0x0000000075370000-0x0000000075921000-memory.dmp

      Filesize

      5.7MB

    • memory/1404-3-0x0000000075370000-0x0000000075921000-memory.dmp

      Filesize

      5.7MB

    • memory/1404-5-0x0000000075370000-0x0000000075921000-memory.dmp

      Filesize

      5.7MB

    • memory/1404-4-0x0000000075372000-0x0000000075373000-memory.dmp

      Filesize

      4KB

    • memory/1404-6-0x0000000075370000-0x0000000075921000-memory.dmp

      Filesize

      5.7MB

    • memory/1404-32-0x0000000075370000-0x0000000075921000-memory.dmp

      Filesize

      5.7MB

    • memory/1404-0-0x0000000075372000-0x0000000075373000-memory.dmp

      Filesize

      4KB

    • memory/3764-9-0x0000000000400000-0x00000000004B7000-memory.dmp

      Filesize

      732KB

    • memory/3764-13-0x0000000001560000-0x0000000001561000-memory.dmp

      Filesize

      4KB

    • memory/3764-11-0x0000000000400000-0x00000000004B7000-memory.dmp

      Filesize

      732KB

    • memory/3764-12-0x0000000000400000-0x00000000004B7000-memory.dmp

      Filesize

      732KB

    • memory/3764-10-0x0000000000400000-0x00000000004B7000-memory.dmp

      Filesize

      732KB

    • memory/3764-7-0x0000000000400000-0x00000000004B7000-memory.dmp

      Filesize

      732KB