Overview

overview

10

Static

static

3

AWB No_9G8...59.exe

windows10-2004-x64

10

AWB No_9G8...59.exe

windows11-21h2-x64

10

$PLUGINSDI...em.dll

windows10-2004-x64

3

$PLUGINSDI...em.dll

windows11-21h2-x64

3

Sharing

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General

  • Target
    AWB No_9G8858, AWB No_9B009177, HAWB No_ 9G88559.exe
  • Size 256KB
  • Sample260216-ms5kcsbz2b
  • SHA256 b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
guloaderremcosremotehostcollectiondiscoverydownloaderrat

Malware Config

Extracted

Family

  • remcos

Version

  • 7.1.0 Pro

Botnet

  • RemoteHost

C2

  • 198.46.173.31:2404

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

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-CBY33Z

  • 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
      AWB No_9G8858, AWB No_9B009177, HAWB No_ 9G88559.exe
    • Size 256KB
    • SHA256 b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    discoverydownloaderguloaderremotehostcollectionremcosrat

    • Guloader family

      guloader

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • Remcos

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

      ratremcos

    • Remcos family

      remcos

    • 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

    • Loads dropped DLL

    • Accesses Microsoft Outlook accounts

      collection

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

    behavioral1behavioral2
    • Target
      $PLUGINSDIR/System.dll
    • Size 11KB
    • SHA256 c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    3/10
    discovery
    behavioral3behavioral4

MITRE ATT&CK Enterprise v16

Tasks