Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-01-2025 22:53

General

  • Target

    JaffaCakes118_68b51f46404ef40e243df9bc6f97fbb5.exe

  • Size

    747KB

  • MD5

    68b51f46404ef40e243df9bc6f97fbb5

  • SHA1

    a0b1253f2f72ca6cfbbd45892d7a6ec708874d2b

  • SHA256

    fb4385a75b5c49473057991eda06012c9774fac6578a861558139718cb5b7108

  • SHA512

    6b1d72fa2302638b910906d1211f5042a908813779aa6bd7aa9d8d8046c61f7318b9b8646a80fc234dc2c5a584f95bb3ea1f527bb7ce0918cd5948383a58ef57

  • SSDEEP

    12288:1ZQt4Q2+rqkgeCW47dwfzOJSiElgR5eSJcf6colYQY/MvnB7yubadHQZzaFWwV:rwK8Xge7smbO915eSJ9c/2ssz

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

bojan9090.no-ip.biz:90

Mutex

DC_MUTEX-1LECKLA

Attributes
  • InstallPath

    system32\winupdate.exe

  • gencode

    DjaJfA5nYcpv

  • 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
  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modiloader family
  • Windows security bypass 2 TTPs 1 IoCs
  • ModiLoader Second Stage 4 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • ASPack v2.12-2.42 1 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Windows security modification 2 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 3 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 10 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
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 50 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_68b51f46404ef40e243df9bc6f97fbb5.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_68b51f46404ef40e243df9bc6f97fbb5.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:5072
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\N4YqUG.vbs"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4984
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_68b51f46404ef40e243df9bc6f97fbb5.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_68b51f46404ef40e243df9bc6f97fbb5.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Checks computer location settings
      • Adds Run key to start application
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3572
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_68b51f46404ef40e243df9bc6f97fbb5.exe" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1100
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_68b51f46404ef40e243df9bc6f97fbb5.exe" +s +h
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:1060
      • 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:3616
        • 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:316
      • C:\Windows\SysWOW64\system32\winupdate.exe
        "C:\Windows\system32\system32\winupdate.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4580
        • C:\Windows\SysWOW64\system32\winupdate.exe
          "C:\Windows\SysWOW64\system32\winupdate.exe"
          4⤵
          • Windows security bypass
          • Executes dropped EXE
          • Windows security modification
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1892
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
            • System Location Discovery: System Language Discovery
            PID:3432

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\N4YqUG.vbs

    Filesize

    357B

    MD5

    da4866994089f28da3fb9536c45d6570

    SHA1

    c476d4eba7c8b74f314dd80dfc881c48664ad86c

    SHA256

    2d79479423c303f2c6a0735113c0c359df8749ef1c32a695701c2a5a0f081b8d

    SHA512

    e0faefdb3540b43b4e68a9b60ad5247601db27389bbe2e81fe88ecd546eee3ad7fc93624423e147cf517c48642af2133381f54db7200cfffcba497dd53aa7748

  • C:\Windows\SysWOW64\system32\winupdate.exe

    Filesize

    747KB

    MD5

    68b51f46404ef40e243df9bc6f97fbb5

    SHA1

    a0b1253f2f72ca6cfbbd45892d7a6ec708874d2b

    SHA256

    fb4385a75b5c49473057991eda06012c9774fac6578a861558139718cb5b7108

    SHA512

    6b1d72fa2302638b910906d1211f5042a908813779aa6bd7aa9d8d8046c61f7318b9b8646a80fc234dc2c5a584f95bb3ea1f527bb7ce0918cd5948383a58ef57

  • memory/1892-95-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-86-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-87-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-97-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-96-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-99-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-94-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-102-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-93-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-101-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-100-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-84-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-83-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-98-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-92-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-103-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-91-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1892-90-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/3432-85-0x0000000000C90000-0x0000000000C91000-memory.dmp

    Filesize

    4KB

  • memory/3572-8-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/3572-9-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/3572-89-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/3572-14-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/3572-13-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/3572-12-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/4580-76-0x0000000000400000-0x0000000000589000-memory.dmp

    Filesize

    1.5MB

  • memory/4580-81-0x0000000000400000-0x0000000000589000-memory.dmp

    Filesize

    1.5MB

  • memory/4580-77-0x0000000000400000-0x0000000000589000-memory.dmp

    Filesize

    1.5MB

  • memory/5072-0-0x0000000000400000-0x0000000000589000-memory.dmp

    Filesize

    1.5MB

  • memory/5072-1-0x0000000000400000-0x0000000000589000-memory.dmp

    Filesize

    1.5MB

  • memory/5072-11-0x0000000000400000-0x0000000000589000-memory.dmp

    Filesize

    1.5MB