Overview

overview

10

Static

static

3

Update.exe

windows7-x64

10

Update.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    Update.exe
  • Size 20.4MB
  • Sample240601-b2cedsdc2z
  • SHA256 4a424271b9a191afc76110e2bccd45f23cc281853f223d3e27756e16c14b5019
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasaremmassubdiscoveryexecutionspywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • EmmasSub

C2

  • 85.23.24.170:4782

  • 85.23.109.34:4782

  • 82.128.254.93:4782

Mutex

  • f82c7021-f558-4f6f-bbb3-fbe420c708e5

Attributes
  • encryption_key

    4DC093FC202D016F95DCEE92AAF2874F56ACC3F2

  • install_name

    RuntimeBroker.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Update

  • subdirectory

    WindowsSecureManager

Targets

    • Target
      Update.exe
    • Size 20.4MB
    • SHA256 4a424271b9a191afc76110e2bccd45f23cc281853f223d3e27756e16c14b5019
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaremmassubdiscoveryexecutionspywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Executes dropped EXE

    • Loads dropped DLL

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks