General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • Sample

    250111-2e9dqavmfk

  • MD5

    2ec8bb66e6d31a3eed3ab81af9c86633

  • SHA1

    51775afa0bda90e7fb956897a0649302a6e3e862

  • SHA256

    8c693ee26028976b6f9377f1a95e27cb821120e2ab6b5ffb885782f66eb59699

  • SHA512

    a9b2fab76f360e7cdde888b205d823c062e9d883dfe97a066590a00e43ab2d6e8853223ff44e572bc221da03bd8f9bf2c419851783322172618f56a6e52c6d0a

  • SSDEEP

    49152:rvTlL26AaNeWgPhlmVqvMQ7XSKsZxNESEZk/i6LoGdwETHHB72eh2NT:rvJL26AaNeWgPhlmVqkQ7XSK+xMkg

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

aurelosking-49560.portmap.host:49560

Mutex

9064a2b3-19b5-40a3-82ef-c2a129c8a662

Attributes
  • encryption_key

    151D6A9E126EFB6E3B926F9127D87D6BF4A4C605

  • install_name

    fontdrvhost.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    SecurityHealthSystray.exe

  • subdirectory

    NVlDlA

Targets

    • Target

      Client-built.exe

    • Size

      3.1MB

    • MD5

      2ec8bb66e6d31a3eed3ab81af9c86633

    • SHA1

      51775afa0bda90e7fb956897a0649302a6e3e862

    • SHA256

      8c693ee26028976b6f9377f1a95e27cb821120e2ab6b5ffb885782f66eb59699

    • SHA512

      a9b2fab76f360e7cdde888b205d823c062e9d883dfe97a066590a00e43ab2d6e8853223ff44e572bc221da03bd8f9bf2c419851783322172618f56a6e52c6d0a

    • SSDEEP

      49152:rvTlL26AaNeWgPhlmVqvMQ7XSKsZxNESEZk/i6LoGdwETHHB72eh2NT:rvJL26AaNeWgPhlmVqkQ7XSK+xMkg

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Executes dropped EXE

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads user/profile data of web browsers

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

MITRE ATT&CK Enterprise v15

Tasks