Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/06/2024, 00:19

General

  • Target
    1816dd0f974fecd01a3aee390593de19_JaffaCakes118.exe
  • Size 1.3MB
  • Sample240628-al6gvsshqp
  • SHA256 4b259a4d6a566836a4e511b7ca5d0bd5775360fd52eaf89b03035d4e602431c5
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • darkcomet

Botnet
  • metin2-gio

C2
  • 127.0.0.1:1604

  • hepter.dyndns.biz:8211

  • hepter.no-ip.org:8211

  • 127.0.0.1:8211

Mutex
  • DC_MUTEX-C50UDX6

Attributes
  • InstallPath

    Resimlerim\Profiles\chrome.exe

  • gencode

    ja8PAQUAvm4V

  • install

    true

  • offline_keylogger

    true

  • password

    hepter

  • persistence

    true

  • reg_key

    GoogleUpdate

Signatures

  • Darkcomet

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

  • 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 1 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • 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.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 2 IoCs
  • Windows security modification 2 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1816dd0f974fecd01a3aee390593de19_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\1816dd0f974fecd01a3aee390593de19_JaffaCakes118.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in System32 directory
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1600
    • C:\Users\Admin\AppData\Local\Temp\1816dd0f974fecd01a3aee390593de19_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\1816dd0f974fecd01a3aee390593de19_JaffaCakes118.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1568
      • C:\Users\Admin\AppData\Local\Temp\1816dd0f974fecd01a3aee390593de19_JaffaCakes118.exe
        "C:\Users\Admin\AppData\Local\Temp\1816dd0f974fecd01a3aee390593de19_JaffaCakes118.exe"
        3⤵
        • Modifies WinLogon for persistence
        • Checks computer location settings
        • Adds Run key to start application
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:684
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\1816dd0f974fecd01a3aee390593de19_JaffaCakes118.exe" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4088
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp\1816dd0f974fecd01a3aee390593de19_JaffaCakes118.exe" +s +h
            5⤵
            • Sets file to hidden
            • Views/modifies file attributes
            PID:884
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4084
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
            5⤵
            • Sets file to hidden
            • Views/modifies file attributes
            PID:756
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
          • Deletes itself
          PID:5100
        • C:\Users\Admin\Documents\Resimlerim\Profiles\chrome.exe
          "C:\Users\Admin\Documents\Resimlerim\Profiles\chrome.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2576
          • C:\Users\Admin\Documents\Resimlerim\Profiles\chrome.exe
            "C:\Users\Admin\Documents\Resimlerim\Profiles\chrome.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:4228
            • C:\Users\Admin\Documents\Resimlerim\Profiles\chrome.exe
              "C:\Users\Admin\Documents\Resimlerim\Profiles\chrome.exe"
              6⤵
              • Modifies firewall policy service
              • Modifies security service
              • Windows security bypass
              • Disables RegEdit via registry modification
              • Executes dropped EXE
              • Windows security modification
              • Adds Run key to start application
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              PID:2796
              • C:\Windows\SysWOW64\notepad.exe
                notepad
                7⤵
                  PID:5044
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1344 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:8
      1⤵
        PID:872

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            88603cb2913a7df3fbd16b5f958e6447_2397ee06-28fe-4eaa-8777-f7014368c353

            • Path C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-3808065738-1666277613-1125846146-1000\88603cb2913a7df3fbd16b5f958e6447_2397ee06-28fe-4eaa-8777-f7014368c353
            • Size 51B
            • SHA256 374e0e2897a7a82e0e44794cad89df0f3cdd7703886239c1fe06d625efd48092
            • MD5 SHA1 SHA512

            chrome.exe

            • Path C:\Users\Admin\Documents\Resimlerim\Profiles\chrome.exe
            • Size 1.3MB
            • SHA256 4b259a4d6a566836a4e511b7ca5d0bd5775360fd52eaf89b03035d4e602431c5
            • MD5 SHA1 SHA512 SSDEEP

            0c0c0c0c.dll

            • Path C:\Windows\SysWOW64\0c0c0c0c.dll
            • Size 1.3MB
            • SHA256 0ca52bc5cf854e274e15ba07df97b2e75ec4e1fc2d90f23676da7fa3c95da089
            • MD5 SHA1 SHA512 SSDEEP

            memory/684-91-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/684-16-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/684-17-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/684-20-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/684-21-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/684-22-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/1568-8-0x0000000000400000-0x0000000000406000-memory.dmp

            memory/1568-11-0x0000000000400000-0x0000000000406000-memory.dmp

            memory/1568-18-0x0000000000400000-0x0000000000406000-memory.dmp

            memory/1600-10-0x0000000000400000-0x00000000005D4000-memory.dmp

            memory/1600-0-0x0000000000400000-0x00000000005D4000-memory.dmp

            memory/1600-1-0x00000000001C0000-0x00000000001C3000-memory.dmp

            memory/2576-99-0x0000000000400000-0x00000000005D4000-memory.dmp

            memory/2796-103-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-113-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-123-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-107-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-106-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-109-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-110-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-122-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-121-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-111-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-112-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-120-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-114-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-115-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-116-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-117-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-118-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/2796-119-0x0000000000400000-0x00000000004BC000-memory.dmp

            memory/4228-95-0x0000000000400000-0x0000000000406000-memory.dmp

            memory/4228-104-0x0000000000400000-0x0000000000406000-memory.dmp

            memory/5044-108-0x0000000001330000-0x0000000001331000-memory.dmp

            memory/5100-26-0x0000000001360000-0x0000000001361000-memory.dmp