General

  • Target

    a1a334aa5fd2ba1b468b2fac316ffd7ffbf5708dfa85f966689fe43bc18602e3

  • Size

    948KB

  • Sample

    241202-lj59vsvpem

  • MD5

    b31e94b9aa3fc572228587333b83ebfe

  • SHA1

    59996644977220b310542daa6163115505aa8c59

  • SHA256

    a1a334aa5fd2ba1b468b2fac316ffd7ffbf5708dfa85f966689fe43bc18602e3

  • SHA512

    7d5a8f844d0e048af811c26d3e13ecaa674206da041378181d482e6e673da739f7facd98eba545a0ddf73953d57010e678515010e5a96adc00c5858d80c1b6bb

  • SSDEEP

    24576:eYE1uJu2UOgZNYZmFhCzc3a2YZY6YixjoJx:tXDUI8mqa2YZjxMJx

Malware Config

Extracted

Family

remcos

Botnet

Document

C2

45.138.48.25:3333

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    WinUpdate.exe

  • copy_folder

    WinUpdate

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %Temp%

  • keylog_crypt

    false

  • keylog_file

    WinUpdat.dat

  • keylog_flag

    false

  • keylog_folder

    WinUpdat

  • mouse_option

    false

  • mutex

    Rmc-E10MWO

  • 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

      a1a334aa5fd2ba1b468b2fac316ffd7ffbf5708dfa85f966689fe43bc18602e3

    • Size

      948KB

    • MD5

      b31e94b9aa3fc572228587333b83ebfe

    • SHA1

      59996644977220b310542daa6163115505aa8c59

    • SHA256

      a1a334aa5fd2ba1b468b2fac316ffd7ffbf5708dfa85f966689fe43bc18602e3

    • SHA512

      7d5a8f844d0e048af811c26d3e13ecaa674206da041378181d482e6e673da739f7facd98eba545a0ddf73953d57010e678515010e5a96adc00c5858d80c1b6bb

    • SSDEEP

      24576:eYE1uJu2UOgZNYZmFhCzc3a2YZY6YixjoJx:tXDUI8mqa2YZjxMJx

    • HawkEye

      HawkEye is a malware kit that has seen continuous development since at least 2013.

    • Hawkeye family

    • Remcos

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

    • Remcos family

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Command and Scripting Interpreter: PowerShell

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

    • Uses browser remote debugging

      Can be used control the browser and steal sensitive information such as credentials and session cookies.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks