General

  • Target

    qqsarbuilder.exe

  • Size

    3.1MB

  • Sample

    240804-n6rfbsyfng

  • MD5

    ea1ab6ce5932a3718821475f19feefea

  • SHA1

    5ab97ce62532976abd93ed2cf56662b8ec15606c

  • SHA256

    27f1a7bab299f2c36793116723e05be58c6edff36c07ba24a2703903cbdd6048

  • SHA512

    e66fa91097b2f725503206bd7e92da486ffd17a9c8fab221387c1d3795e59afedae4fb791b9c530e2e25272a642964e63dc15fe081faed29289c332db8523838

  • SSDEEP

    49152:fvSI22SsaNYfdPBldt698dBcjHvSZxNESEJk/ijLoGdLqiTHHB72eh2NT:fv/22SsaNYfdPBldt6+dBcjHvUxAv7

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.174.129:4782

Mutex

4642d254-5910-430f-8e8f-b944ab72b6fd

Attributes
  • encryption_key

    F0F78B2B4A3D25098C1C1557DC99FDA4D204F27D

  • install_name

    windwsupdater.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    windwsupdater

  • subdirectory

    SubDir

Targets

    • Target

      qqsarbuilder.exe

    • Size

      3.1MB

    • MD5

      ea1ab6ce5932a3718821475f19feefea

    • SHA1

      5ab97ce62532976abd93ed2cf56662b8ec15606c

    • SHA256

      27f1a7bab299f2c36793116723e05be58c6edff36c07ba24a2703903cbdd6048

    • SHA512

      e66fa91097b2f725503206bd7e92da486ffd17a9c8fab221387c1d3795e59afedae4fb791b9c530e2e25272a642964e63dc15fe081faed29289c332db8523838

    • SSDEEP

      49152:fvSI22SsaNYfdPBldt698dBcjHvSZxNESEJk/ijLoGdLqiTHHB72eh2NT:fv/22SsaNYfdPBldt6+dBcjHvUxAv7

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Executes dropped EXE

MITRE ATT&CK Enterprise v15

Tasks