Overview

overview

10

Static

static

3

da61841e7d...fd.exe

windows10-2004-x64

10

da61841e7d...fd.exe

windows11-21h2-x64

10

$PLUGINSDI...em.dll

windows10-2004-x64

3

$PLUGINSDI...em.dll

windows11-21h2-x64

3

Sharing

Copy URL Twitter E-mail

General

  • Target
    da61841e7d57845bdbe2c29820b26e7ecefb0895e4aabfb08d97533d1c0d80fd.exe
  • Size 507KB
  • Sample251208-tap6aazlal
  • SHA256 da61841e7d57845bdbe2c29820b26e7ecefb0895e4aabfb08d97533d1c0d80fd
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
remcosremotehostdiscoveryinstallerpersistencerat

Malware Config

Extracted

Family

  • remcos

Version

  • 7.1.0 Pro

Botnet

  • RemoteHost

C2

  • 107.173.227.99:2404

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

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-WVGX9S

  • 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
      da61841e7d57845bdbe2c29820b26e7ecefb0895e4aabfb08d97533d1c0d80fd.exe
    • Size 507KB
    • SHA256 da61841e7d57845bdbe2c29820b26e7ecefb0895e4aabfb08d97533d1c0d80fd
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    remotehostdiscoveryremcosinstallerpersistencerat

    • Remcos

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

      ratremcos

    • Remcos family

      remcos

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1behavioral2
    • Target
      $PLUGINSDIR/System.dll
    • Size 12KB
    • SHA256 014f1dfeb842cf7265a3644bc6903c592abe9049bfc7396829172d3d72c4d042
    • MD5 SHA1 SHA512 SSDEEP
    Score
    3/10
    discovery
    behavioral3behavioral4

MITRE ATT&CK Enterprise v16

Tasks