Analysis

  • max time kernel
    150s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    08-12-2024 03:41

General

  • Target

    d5120831f470dfc446f0eb7f0828025d_JaffaCakes118.exe

  • Size

    762KB

  • MD5

    d5120831f470dfc446f0eb7f0828025d

  • SHA1

    d5c87a9c79988ca71f1f59ecf8b063a886d36175

  • SHA256

    09bb29e6a47c5eb92ee01c737f34cc2b2092ae6c6ddc1b6455fdf4754526ddcb

  • SHA512

    7f4bd79b075d6cb0ef131dac443d29c93910cc069710628f24be5276f94c8e65a939ade9060d823b1a008cfc02da59afb6e40d120e524d1985b3aa38f1742493

  • SSDEEP

    12288:s/fDmRvzHR/Dg3HycWvhAVfeBD8/D1nmcX6jgf+ESbMjgHSFSktyQe/rhhPl5WLG:YDmdzx/Dg3uZAVfeq/D3XXBSAjgHSnsz

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

178.252.116.91:1604

Mutex

DC_MUTEX-MNKZPGM

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    8zGLDtrYqZZ2

  • 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
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 4 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Executes dropped EXE 7 IoCs
  • Loads dropped DLL 10 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • UPX packed file 7 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 12 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 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d5120831f470dfc446f0eb7f0828025d_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\d5120831f470dfc446f0eb7f0828025d_JaffaCakes118.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2500
    • C:\Users\Admin\AppData\Local\Temp\server.exe
      "C:\Users\Admin\AppData\Local\Temp\server.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2592
      • C:\Users\Admin\AppData\Local\_xx_server.exe
        "C:\Users\Admin\AppData\Local\_xx_server.exe"
        3⤵
        • Boot or Logon Autostart Execution: Active Setup
        • Executes dropped EXE
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2200
        • C:\Users\Admin\AppData\Local\_xx_server.exe
          "C:\Users\Admin\AppData\Local\_xx_server.exe"
          4⤵
          • Boot or Logon Autostart Execution: Active Setup
          • Executes dropped EXE
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          PID:2096
    • C:\Users\Admin\AppData\Local\Temp\stealer.exe
      "C:\Users\Admin\AppData\Local\Temp\stealer.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2400
      • C:\Users\Admin\AppData\Roaming\stealer.exe
        "C:\Users\Admin\AppData\Roaming\stealer.exe"
        3⤵
        • Executes dropped EXE
        PID:2796
    • C:\Users\Admin\AppData\Local\Temp\darkcomettt.exe
      "C:\Users\Admin\AppData\Local\Temp\darkcomettt.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2408
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\darkcomettt.exe" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2552
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\darkcomettt.exe" +s +h
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:1624
      • 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:2720
        • 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:2924
      • C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
        "C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • 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:548
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2916

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\darkcomettt.exe

    Filesize

    252KB

    MD5

    10a32b9c47dab5a25ea12a3beffb17d0

    SHA1

    ab924fd6d76aa5ec325ac8d8ecac42b80d56fb91

    SHA256

    37cee6ae388f4eed1059fa76f43a143f7961be3c60e4cfc62ec737b16144a0c2

    SHA512

    f3565c48bafc041b23ec3e78767eb62a894037534296693be2928e7cc478234a7fe5eb88ec4b59a9d56f9c5f989e616ecf5967e02ffb8ae5a7c288e6836d3f5f

  • C:\Users\Admin\AppData\Local\Temp\stealer.exe

    Filesize

    24KB

    MD5

    700d01c4ae4b6f744aeab06505192eb5

    SHA1

    0fa45619d140b198beb6b3dc7eeaecf86a3e04c9

    SHA256

    dc4ac9c8cbea4f8095d5241f6242dabfe34ce0bab8da880f98d62c3b541b5ff8

    SHA512

    947846d7c64aa6f83bdfc31c9b0ec86f78a42f0d5a263a780438fcf51d533efd83d7c983c3642850f7bb1f0624489e371531f615b9d20a298fa6c353324c7ad2

  • \Users\Admin\AppData\Local\Temp\server.exe

    Filesize

    669KB

    MD5

    a6ca67fa3012333e87e0fbfb4c297f17

    SHA1

    30c7be9d137b2d47a8e1427ac11c3bc0b74dbaf1

    SHA256

    e72764d1ed03901a09d29a17b2ccef09d8084af832b7023afa6caf52db0d9ec7

    SHA512

    3ce127adf4aafde5d8c4ece19cfc49e500ca1a574fdf468d2cb5409a0e2d733e9a73ef02f13dc163c359da6186d5f531e9bb4d021e504a5b7d8b30ec88059ad1

  • memory/548-112-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/548-65-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/548-108-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/548-116-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2200-115-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2200-128-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2200-117-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2200-122-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2200-113-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2200-111-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2200-126-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2200-124-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2200-107-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2200-130-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2200-109-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2400-38-0x0000000000400000-0x000000000045D000-memory.dmp

    Filesize

    372KB

  • memory/2400-26-0x0000000000400000-0x000000000045D000-memory.dmp

    Filesize

    372KB

  • memory/2408-61-0x0000000004070000-0x0000000004127000-memory.dmp

    Filesize

    732KB

  • memory/2408-62-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2408-63-0x0000000004070000-0x0000000004127000-memory.dmp

    Filesize

    732KB

  • memory/2408-28-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/2592-51-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2796-52-0x0000000000400000-0x000000000045D000-memory.dmp

    Filesize

    372KB

  • memory/2796-36-0x0000000000400000-0x000000000045D000-memory.dmp

    Filesize

    372KB

  • memory/2916-67-0x0000000000080000-0x0000000000081000-memory.dmp

    Filesize

    4KB

  • memory/2916-105-0x00000000001E0000-0x00000000001E1000-memory.dmp

    Filesize

    4KB