General

  • Target

    5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070.exe

  • Size

    908KB

  • Sample

    240509-bw866sde22

  • MD5

    1b8e229e83f21a946115606f54fe6b8d

  • SHA1

    cf230bc4206a1789858160a0f2d3a87ed14c36a9

  • SHA256

    5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070

  • SHA512

    1f9911b01d8e3e177badb698819c06c490e3e376e23f40f99b995633e8b033427f2d5120c88d4f373a6fc3bb6e3ba5bbf526d6fa81097a188bf6f963e40bb0d1

  • SSDEEP

    24576:dzobfftwFNnnpXNihW/lZpM8fsp/vY6Jvui7Uxmt9H16OE:dcbXtANn1EhWxMW2+eUxmtV1XE

Malware Config

Extracted

Family

remcos

Botnet

PAPI

C2

64.188.26.202:1604

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-YMJ2R9

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070.exe

    • Size

      908KB

    • MD5

      1b8e229e83f21a946115606f54fe6b8d

    • SHA1

      cf230bc4206a1789858160a0f2d3a87ed14c36a9

    • SHA256

      5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070

    • SHA512

      1f9911b01d8e3e177badb698819c06c490e3e376e23f40f99b995633e8b033427f2d5120c88d4f373a6fc3bb6e3ba5bbf526d6fa81097a188bf6f963e40bb0d1

    • SSDEEP

      24576:dzobfftwFNnnpXNihW/lZpM8fsp/vY6Jvui7Uxmt9H16OE:dcbXtANn1EhWxMW2+eUxmtV1XE

    • Remcos

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

    • UAC bypass

    • Windows security bypass

    • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

    • Detects executables built or packed with MPress PE compressor

    • Detects executables packed with or use KoiVM

    • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

    • Detects executables referencing many email and collaboration clients. Observed in information stealers

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Nirsoft

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Windows security modification

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks