General

  • Target

    https://github.com/quasar/Quasar

  • Sample

    241127-b3fs7swrdj

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

test

C2

10.127.1.151:4782

Mutex

6ad6d219-14d0-45fc-bc95-cf3c78799528

Attributes
  • encryption_key

    0FA38A3015CB7FF12D0B18A28ADA4A3D2F290B41

  • install_name

    Windows Updater.exe

  • log_directory

    Logs

  • reconnect_delay

    1

  • startup_key

    Windows Updater

  • subdirectory

    SubDir

Targets

    • Target

      https://github.com/quasar/Quasar

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • 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)

    • Legitimate hosting services abused for malware hosting/C2

MITRE ATT&CK Enterprise v15

Tasks