Overview

overview

10

Static

static

3cf83d826c...2f.rtf

windows7-x64

10

3cf83d826c...2f.rtf

windows10-2004-x64

1

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General

  • Target

    3cf83d826c47b887733f5f279e16936e9fa36efb6ad6badd5b1fb3aaeeb43a2f.doc

  • Size

    23KB

  • Sample

    221203-bxk6qsga3t

  • MD5

    4c6aaef387645227a1a987043d56d6be

  • SHA1

    feaec8f7f4652115ee34e2eae79987778ca87de9

  • SHA256

    3cf83d826c47b887733f5f279e16936e9fa36efb6ad6badd5b1fb3aaeeb43a2f

  • SHA512

    ef2d4e034f262fbe25a81f9db08b00c7c87881c96c76c7958ca547174f6b9791ea64bc499936af27b140cac2d9161b24f04edab9b13fd3889f916d22da97879c

  • SSDEEP

    384:KQMmdOFNYY0aaaIswqPeOrka1+fHQJ+t3rQkRhZ9GBpwe2ok/+EeIA:GFx0XaIsnPRIa4fwJMi7J2ok/HHA

Score
10/10
remcosdec 1stevasionpersistencerattrojan

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Dec 1st

C2

terzona2022.duckdns.org:3030

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    Windows input text.exe

  • copy_folder

    Microsoft Text

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    true

  • install_path

    %WinDir%

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    Windows Display

  • keylog_path

    %WinDir%

  • mouse_option

    false

  • mutex

    Windows Audio

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    Microsoft Sound Text

  • take_screenshot_option

    true

  • take_screenshot_time

    5

  • take_screenshot_title

    Username;password;proforma;invoice;notepad

Targets

    • Target

      3cf83d826c47b887733f5f279e16936e9fa36efb6ad6badd5b1fb3aaeeb43a2f.doc

    • Size

      23KB

    • MD5

      4c6aaef387645227a1a987043d56d6be

    • SHA1

      feaec8f7f4652115ee34e2eae79987778ca87de9

    • SHA256

      3cf83d826c47b887733f5f279e16936e9fa36efb6ad6badd5b1fb3aaeeb43a2f

    • SHA512

      ef2d4e034f262fbe25a81f9db08b00c7c87881c96c76c7958ca547174f6b9791ea64bc499936af27b140cac2d9161b24f04edab9b13fd3889f916d22da97879c

    • SSDEEP

      384:KQMmdOFNYY0aaaIswqPeOrka1+fHQJ+t3rQkRhZ9GBpwe2ok/+EeIA:GFx0XaIsnPRIa4fwJMi7J2ok/HHA

    Score
    10/10
    remcosdec 1stevasionpersistencerattrojan

    • Remcos

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

      ratremcos

    • UAC bypass

      evasiontrojan

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Exploitation for Client Execution

1
T1203

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Modify Registry

4
T1112

Credential Access

Discovery

System Information Discovery

3
T1082

Query Registry

2
T1012

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks