Overview

overview

10

Static

static

10

BRUH_QUASAR.exe

windows11-21h2-x64

10

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General

  • Target

    BRUH_QUASAR.exe

  • Size

    3.1MB

  • Sample

    240601-we3naaah32

  • MD5

    24a82c21233460c9796a86c7857a2adf

  • SHA1

    88017202e84f8d0174caa451bbebd64401ae8032

  • SHA256

    57e13460fbe54a3cc57d9abfaf6ef9a9c3c2d804230e4df7d8f97408501e7dfa

  • SHA512

    32aa12d6dfe90c7dbe2c8f82d60d92e649d381b365c7cc7493526693257d5f859ea8ae5b8b6424193f5465aac76bf210415949ea7b18965644b01f27f38f47a1

  • SSDEEP

    98304:ifNEOWyKYuMQ+xuMiTMBzOKYLSmPX1qadpu4IdXeYbsjeveyYHHY8evKe5Xfc9Oe:AfNuMiTNKYmmPX1qadpu4IdXeYbsjevK

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

    • MD5

      24a82c21233460c9796a86c7857a2adf

    • SHA1

      88017202e84f8d0174caa451bbebd64401ae8032

    • SHA256

      57e13460fbe54a3cc57d9abfaf6ef9a9c3c2d804230e4df7d8f97408501e7dfa

    • SHA512

      32aa12d6dfe90c7dbe2c8f82d60d92e649d381b365c7cc7493526693257d5f859ea8ae5b8b6424193f5465aac76bf210415949ea7b18965644b01f27f38f47a1

    • SSDEEP

      98304:ifNEOWyKYuMQ+xuMiTMBzOKYLSmPX1qadpu4IdXeYbsjeveyYHHY8evKe5Xfc9Oe:AfNuMiTNKYmmPX1qadpu4IdXeYbsjevK

    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 Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

2
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

System Information Discovery

3
T1082

Query Registry

3
T1012

Lateral Movement

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks