Overview

overview

10

Static

static

10

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

Sharing

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General

  • Target
    file.exe
  • Size 470KB
  • Sample221107-3v5k5sfda2
  • SHA256 5324e064b98586e1f727eac2ab089af2c466e9b702af73d7fff281e17f725ee8
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
remcosv381_bpersistencerat

Malware Config

Extracted

Family

  • remcos

Botnet

  • v381_B

C2

  • srv01.airdns.org:32841

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    winupd381.exe

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    true

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • mouse_option

    false

  • mutex

    winupd_v381-XLOJM7

  • screenshot_crypt

    true

  • screenshot_flag

    false

  • screenshot_folder

    winupdc_sc

  • screenshot_time

    1

  • startup_value

    winupd381

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    notepad;solitaire;

Targets

    • Target
      file.exe
    • Size 470KB
    • SHA256 5324e064b98586e1f727eac2ab089af2c466e9b702af73d7fff281e17f725ee8
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    remcosv381_bpersistencerat

    • Remcos

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

      ratremcos

    • Executes dropped EXE

    • Deletes itself

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v6

Tasks