General

  • Target

    Recibo de transferencia·pdf.vbs

  • Size

    80KB

  • Sample

    241001-f8a75ashlp

  • MD5

    a510a741cf02891a5ae7268b7b92b9b8

  • SHA1

    2740b1d3da34dab2396388ebb2c97763a3164ce5

  • SHA256

    b1475086f2f81e2aca88d89cb0620f04e8d0b0a20b956821a0d2efe1b65ce060

  • SHA512

    f8b09143c1fde918ef01c508c781af213c934d332956c43acbaba6116cd3d3874db8315d1e15eeb8da33e52fc0898569b8c95a5540051be3de48731cf89fb091

  • SSDEEP

    1536:sjYl/iQZBql+3LAtEhHt1TtcjQ+yztqwT7C25jmiS8ybyf:sjYB7ZAoHCyzMy75y2f

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

a458386d9.duckdns.org:3256

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • delete_file

    false

  • hide_file

    true

  • 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-WDQFG0

  • 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

      Recibo de transferencia·pdf.vbs

    • Size

      80KB

    • MD5

      a510a741cf02891a5ae7268b7b92b9b8

    • SHA1

      2740b1d3da34dab2396388ebb2c97763a3164ce5

    • SHA256

      b1475086f2f81e2aca88d89cb0620f04e8d0b0a20b956821a0d2efe1b65ce060

    • SHA512

      f8b09143c1fde918ef01c508c781af213c934d332956c43acbaba6116cd3d3874db8315d1e15eeb8da33e52fc0898569b8c95a5540051be3de48731cf89fb091

    • SSDEEP

      1536:sjYl/iQZBql+3LAtEhHt1TtcjQ+yztqwT7C25jmiS8ybyf:sjYB7ZAoHCyzMy75y2f

    • Remcos

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

    • Blocklisted process makes network request

    • Checks computer location settings

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

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Legitimate hosting services abused for malware hosting/C2

    • Network Service Discovery

      Attempt to gather information on host's network.

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks