Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-05-2024 23:16

General

  • Target

    5bfc4a0b0e7484ff63f2eb66b45186b7_JaffaCakes118.exe

  • Size

    624KB

  • MD5

    5bfc4a0b0e7484ff63f2eb66b45186b7

  • SHA1

    804f350c5034fc13fcc3d49e72de98799e301fb2

  • SHA256

    9ab651c11036df65785bcd01fe6ecb68a9b0beb56579b76c350dbd3f6960f0ae

  • SHA512

    084dcda591290c89d1fec84c7868d65522d193524cbbc15d61bec710f617535bf77386ea5a6c3c1b366cce216dd7310d84271847775497533648d04b8ae00620

  • SSDEEP

    6144:Fp7rCb1Ekm7tzWFMLP1Coq4nFNDsFWhMh0Q/AISm9rY1NOC8IBfmbhscwovdC5OB:FJrCZW9WGLP1MWaym3C8qmbyo05OcEl

Malware Config

Extracted

Family

remcos

Version

1.8.1 Pro

Botnet

MicrosoftDll

C2

1.habladourf.top:24043

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    crrcs.exe

  • copy_folder

    Microsoft

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    true

  • install_path

    %WinDir%\System32

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    ERDATYFVUASG_AGSJHDJDJG-GR2269

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    crrcs.exe

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in System32 directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 28 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5bfc4a0b0e7484ff63f2eb66b45186b7_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\5bfc4a0b0e7484ff63f2eb66b45186b7_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in System32 directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5100
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4948
      • C:\Windows\SysWOW64\PING.EXE
        PING 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:2244
      • C:\Windows\SysWOW64\Microsoft\crrcs.exe
        "C:\Windows\SysWOW64\Microsoft\crrcs.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:4164
  • 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 --field-trial-handle=4256,i,13640054265074968359,8146127767143474550,262144 --variations-seed-version --mojo-platform-channel-handle=3924 /prefetch:8
    1⤵
      PID:1596

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\install.bat

      Filesize

      90B

      MD5

      163f2af0d421cff56e30d04e89363fe7

      SHA1

      5116aa1cad828ecd3e0819c15523839901fa6eac

      SHA256

      2f9c8881dd083f02446f616ce3fbbcb008bb92b21cfd5dc85652a38d297eebf5

      SHA512

      303ca46c8319393f7257088328da0bcd4b5a66de64fb15fd0e306dccf4985d8179d73c346d44c574807436aedd7da8cabb0c24494876fb5c151dd62d174bc8fb

    • C:\Windows\SysWOW64\Microsoft\crrcs.exe

      Filesize

      624KB

      MD5

      5bfc4a0b0e7484ff63f2eb66b45186b7

      SHA1

      804f350c5034fc13fcc3d49e72de98799e301fb2

      SHA256

      9ab651c11036df65785bcd01fe6ecb68a9b0beb56579b76c350dbd3f6960f0ae

      SHA512

      084dcda591290c89d1fec84c7868d65522d193524cbbc15d61bec710f617535bf77386ea5a6c3c1b366cce216dd7310d84271847775497533648d04b8ae00620

    • memory/4164-21-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-33-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-22-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-32-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-31-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-30-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-15-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-16-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-17-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-23-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-29-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-28-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-20-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-24-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-25-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-26-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/4164-27-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/5100-8-0x0000000000400000-0x000000000049C000-memory.dmp

      Filesize

      624KB

    • memory/5100-10-0x0000000000401000-0x000000000041A000-memory.dmp

      Filesize

      100KB

    • memory/5100-1-0x0000000076F42000-0x0000000076F43000-memory.dmp

      Filesize

      4KB

    • memory/5100-2-0x0000000000401000-0x000000000041A000-memory.dmp

      Filesize

      100KB

    • memory/5100-9-0x0000000000570000-0x00000000005EB000-memory.dmp

      Filesize

      492KB

    • memory/5100-0-0x0000000000570000-0x00000000005EB000-memory.dmp

      Filesize

      492KB