Overview

overview

10

Static

static

1

12f5b4bda4...88.vbs

windows7-x64

10

12f5b4bda4...88.vbs

windows10-2004-x64

8

Sharing

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General

  • Target
    12f5b4bda44c7e6efdaa1c0d03e9b17e2779d55ced523a2d36054b68ad4d7d88.zip
  • Size 72KB
  • Sample240402-mll5fafa7x
  • SHA256 ee511bd7f93bedcef2c18179b04b312ed417c9674a19154ea6463b705706d157
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
guloaderremcosremotehostdownloaderpersistencerat

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

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-KQ00DZ

  • 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
      12f5b4bda44c7e6efdaa1c0d03e9b17e2779d55ced523a2d36054b68ad4d7d88.vbs
    • Size 178KB
    • SHA256 12f5b4bda44c7e6efdaa1c0d03e9b17e2779d55ced523a2d36054b68ad4d7d88
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    guloaderremcosremotehostdownloaderpersistencerat

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • Remcos

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

      ratremcos

    • Blocklisted process makes network request

    • Checks computer location settings

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

    • Adds Run key to start application

      persistence

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks