General

  • Target

    30180908_signed·pdf.vbs

  • Size

    33KB

  • Sample

    241129-k5llxaxkev

  • MD5

    33788adfb67a0e0bf5a5fe58cb9c5617

  • SHA1

    a62c45afa541fdcccc5c97c432c78ce55b0a7a5b

  • SHA256

    609aaa35ee7b0582cb3e1e4e9f76d647c98377dac62eca602bf318578b61576f

  • SHA512

    9da759eba3eee9ed6d1b804ed8d26f1f59831d49543e393b6adf462343d98dbefabc0314c673b31a4c52857e0d975edbb8304c0e1ee7a375fd71f446ab655a50

  • SSDEEP

    768:WuEasaYzR+s1z3NkQpyhZ6d4nl3pVVCStrppuAP:zEasd+a3iQpy/V3/UStF3P

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

8766e34g8.duckdns.org:3782

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

    false

  • install_flag

    false

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-93TSMD

  • 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

      30180908_signed·pdf.vbs

    • Size

      33KB

    • MD5

      33788adfb67a0e0bf5a5fe58cb9c5617

    • SHA1

      a62c45afa541fdcccc5c97c432c78ce55b0a7a5b

    • SHA256

      609aaa35ee7b0582cb3e1e4e9f76d647c98377dac62eca602bf318578b61576f

    • SHA512

      9da759eba3eee9ed6d1b804ed8d26f1f59831d49543e393b6adf462343d98dbefabc0314c673b31a4c52857e0d975edbb8304c0e1ee7a375fd71f446ab655a50

    • SSDEEP

      768:WuEasaYzR+s1z3NkQpyhZ6d4nl3pVVCStrppuAP:zEasd+a3iQpy/V3/UStF3P

    • Remcos

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

    • Remcos family

    • UAC bypass

    • 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

    • 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.

    • Accesses Microsoft Outlook accounts

    • Legitimate hosting services abused for malware hosting/C2

    • Network Service Discovery

      Attempt to gather information on host's network.

    • Drops file in System32 directory

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks