Overview

overview

10

Static

static

10

BRUH_QUASAR.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    BRUH_QUASAR.exe
  • Size 3.1MB
  • Sample240601-we3naaah32
  • SHA256 57e13460fbe54a3cc57d9abfaf6ef9a9c3c2d804230e4df7d8f97408501e7dfa
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasarremcos$oxycollectionpersistenceratspywarestealertrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • $OXY

C2

  • 193.34.77.154:4782

Mutex

  • fc050dca-72e2-474b-873c-c6835aec5c39

Attributes
  • encryption_key

    7F75A06DDBDADB13C7843DF2026145379D75E4DA

  • install_name

    $OXY_EXE.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    $OXY_START

  • subdirectory

    $OXY_SUB

Extracted

Family

  • remcos

Botnet

  • $OXY

C2

  • 193.34.77.154:9872

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    2

  • copy_file

    $OXY.exe

  • copy_folder

    $OXY

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    true

  • install_path

    %WinDir%\System32

  • keylog_crypt

    true

  • keylog_file

    $OXYlogs.dat

  • keylog_flag

    false

  • keylog_folder

    $OXY

  • keylog_path

    %WinDir%\System32

  • mouse_option

    false

  • mutex

    $OXY-6JA1WZ

  • screenshot_crypt

    true

  • screenshot_flag

    true

  • screenshot_folder

    $OXY_Screenshots

  • screenshot_path

    %WinDir%\System32

  • screenshot_time

    120

  • startup_value

    $OXY

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target
      BRUH_QUASAR.exe
    • Size 3.1MB
    • SHA256 57e13460fbe54a3cc57d9abfaf6ef9a9c3c2d804230e4df7d8f97408501e7dfa
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasarremcos$oxycollectionpersistenceratspywarestealertrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Remcos

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

      ratremcos

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Accesses Microsoft Outlook profiles

      collection

    • Adds Run key to start application

      persistence

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1

MITRE ATT&CK Enterprise v15

Tasks