Analysis

  • max time kernel
    150s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-11-2024 05:50

General

  • Target

    af492ad9898a50b7cc80c200f33878c3_JaffaCakes118.exe

  • Size

    758KB

  • MD5

    af492ad9898a50b7cc80c200f33878c3

  • SHA1

    290431a139b869b3645c842b9efe0ee70be724b1

  • SHA256

    ec4d2662a6d0c7bf402622ea0ed0782e0aeadf93cf71738c2b8a3498fe97dd8b

  • SHA512

    94e4cdbc6d1cdd2a69be624e92c09f011a58e61d9076b779eb41a5ce4c5da9209b0b3bc7a9398db7d767d6c2ccb83969da291db085979516daf183257994246a

  • SSDEEP

    12288:LXhpvNWw276S/DuoeFcfbmiJ99VPhYR5MTSHvLenELrWv1lZw4JuMkMh/fy452Uw:TnAw2WWeFcfbP9VPSPMTSPL/rWvzq4Jg

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

erpis.no-ip.org:1605

Mutex

DC_MUTEX-F54S21D

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    3UeH82jUifPd

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • 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
  • Modifies firewall policy service 3 TTPs 3 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • 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.

  • Executes dropped EXE 1 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 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 7 IoCs

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

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\af492ad9898a50b7cc80c200f33878c3_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\af492ad9898a50b7cc80c200f33878c3_JaffaCakes118.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:2552
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\af492ad9898a50b7cc80c200f33878c3_JaffaCakes118.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2028
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\af492ad9898a50b7cc80c200f33878c3_JaffaCakes118.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:4300
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:316
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:2584
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies firewall policy service
      • Modifies security service
      • Windows security bypass
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Windows security modification
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:812
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • System Location Discovery: System Language Discovery
        PID:3644

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    758KB

    MD5

    af492ad9898a50b7cc80c200f33878c3

    SHA1

    290431a139b869b3645c842b9efe0ee70be724b1

    SHA256

    ec4d2662a6d0c7bf402622ea0ed0782e0aeadf93cf71738c2b8a3498fe97dd8b

    SHA512

    94e4cdbc6d1cdd2a69be624e92c09f011a58e61d9076b779eb41a5ce4c5da9209b0b3bc7a9398db7d767d6c2ccb83969da291db085979516daf183257994246a

  • memory/812-23-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-14-0x0000000002040000-0x0000000002041000-memory.dmp

    Filesize

    4KB

  • memory/812-21-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-22-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-16-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-17-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-18-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-19-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-29-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-20-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-28-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-27-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-24-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-25-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/812-26-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/2552-0-0x00000000007E0000-0x00000000007E1000-memory.dmp

    Filesize

    4KB

  • memory/2552-13-0x0000000000400000-0x00000000004CD000-memory.dmp

    Filesize

    820KB

  • memory/3644-15-0x00000000006A0000-0x00000000006A1000-memory.dmp

    Filesize

    4KB