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General

  • Target

    https://learn.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes

  • Sample

    250323-kk5t2svwat

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

dsadasdsw-35353.portmap.host:35353

dsadasdsw-35353.portmap.host:443

127.0.0.1:443

127.0.0.1:2404

Mutex

e7fb99cd-b448-4cac-bc42-c50ea869c90e

Attributes
  • encryption_key

    78A943F2F87098354F095739399EB26C9F01D1F3

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      https://learn.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Drops file in Drivers directory

    • A potential corporate email address has been identified in the URL: [email protected]

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Legitimate hosting services abused for malware hosting/C2

    • Mark of the Web detected: This indicates that the page was originally saved or cloned.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks