General

  • Target

    https://limewire.com/d/d4acc0b4-17df-461a-b845-48cad3aa7045#LrIoqXw5-cU1Bw6CR_Vd-ZaoxajsMbOC2L_t3JdXjxs

  • Sample

    250201-nlal3szmcx

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

rigoc45241-20031.portmap.host:20031

Mutex

66aea322-08fe-4429-9c5c-740819da4e74

Attributes
  • encryption_key

    E8DDFB291DB9CFAB280EB23651991DF513559FA4

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      https://limewire.com/d/d4acc0b4-17df-461a-b845-48cad3aa7045#LrIoqXw5-cU1Bw6CR_Vd-ZaoxajsMbOC2L_t3JdXjxs

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Downloads MZ/PE file

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Adds Run key to start application

    • Checks installed software on the system

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

    • Drops desktop.ini file(s)

    • Enumerates connected drives

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

    • Hide Artifacts: Hidden Window

      Windows that would typically be displayed when an application carries out an operation can be hidden.

    • Looks up external IP address via web service

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

    • Checks system information in the registry

      System information is often read in order to detect sandboxing environments.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks