General

  • Target

    747031500_D747031500_A.js

  • Size

    1003KB

  • Sample

    250214-klgtlszkgz

  • MD5

    e3765da77fefd90e2a7e1fe50029a1d8

  • SHA1

    b0aec621810789c80ddeb96d746cc88ee6b0db50

  • SHA256

    8a95a509c657f55f3037336ba69c03f687b6818fdff078aaaba41ee359154eac

  • SHA512

    47c7a5f988e5051aca274b2dfa585348f814fd4105d93b6b6e81dc54044eaab767319ca0e1f62cf160aa1571850e089cb90c94120889cda2b3d47cf7c7d7ef0a

  • SSDEEP

    24576:kYnZJg8/S5NnzlKWrhjxQfB/nQ0xc/qqXsE8zl:dg8/S5NnzlKWrhjxQfB/nQ0xc/PO

Malware Config

Extracted

Family

remcos

Botnet

Host 2025

C2

favor-grace-fax.home-webserver.de:5930

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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

    true

  • install_flag

    false

  • keylog_crypt

    true

  • keylog_file

    iuioh.dat

  • keylog_flag

    false

  • keylog_folder

    iuyt6yu

  • mouse_option

    false

  • mutex

    iuytroiuy77im-KQ32FT

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      747031500_D747031500_A.js

    • Size

      1003KB

    • MD5

      e3765da77fefd90e2a7e1fe50029a1d8

    • SHA1

      b0aec621810789c80ddeb96d746cc88ee6b0db50

    • SHA256

      8a95a509c657f55f3037336ba69c03f687b6818fdff078aaaba41ee359154eac

    • SHA512

      47c7a5f988e5051aca274b2dfa585348f814fd4105d93b6b6e81dc54044eaab767319ca0e1f62cf160aa1571850e089cb90c94120889cda2b3d47cf7c7d7ef0a

    • SSDEEP

      24576:kYnZJg8/S5NnzlKWrhjxQfB/nQ0xc/qqXsE8zl:dg8/S5NnzlKWrhjxQfB/nQ0xc/PO

    • 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

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • 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

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks