Overview

overview

10

Static

static

3

docs917221433.bat.exe

windows10-2004-x64

10

docs917221433.bat.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
    docs917221433.bat.exe
  • Size 1.0MB
  • Sample250423-ejk6cswwbv
  • SHA256 1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
guloaderremcosbn@remydiscoverydownloaderrat

Malware Config

Extracted

Family

  • remcos

Botnet

  • BN@REMY

C2

  • 196.251.116.190:2404

  • 196.251.116.190:2004

  • 196.251.116.190:4507

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-CUJ14B

  • 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
      docs917221433.bat.exe
    • Size 1.0MB
    • SHA256 1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    guloaderremcosbn@remydiscoverydownloaderrat

    • 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

    • Loads dropped DLL

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1behavioral2
    • Target
      $PLUGINSDIR/System.dll
    • Size 11KB
    • SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
    • MD5 SHA1 SHA512 SSDEEP
    Score
    3/10
    discovery
    behavioral3behavioral4

MITRE ATT&CK Enterprise v16

Tasks