General

  • Target

    4f6212f670b6bc2372a97d6ecb2bfbeb.exe

  • Size

    1.4MB

  • Sample

    230801-mzj71afc99

  • MD5

    4f6212f670b6bc2372a97d6ecb2bfbeb

  • SHA1

    789b0d58500c5ca8d53df74edfadcf42f2e0c814

  • SHA256

    beeb985707b6f8539ad51664530bfb507ca9f65d9c1e6e716ca95f5d7e13291b

  • SHA512

    943e92afe2b3aab6929ad8c2b9334155cfca6d0fe954d13e183b975a5598fc6373f4690843ab6cece9a0c1cf42e0157b3c153c8a9297661d9fd7aa6b10a6b699

  • SSDEEP

    24576:U2G/nvxW3Ww0tRp8GiXTBhq7yRDvHcUcjUvy0lr3Tl6icOB/UWoT:UbA30H4zF0UMSAicOB/UWk

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

-

C2

94.131.105.161:12344

Mutex

QSR_MUTEX_UEgITWnMKnRP3EZFzK

Attributes
  • encryption_key

    5Q0JQBQQfAUHRJTcAIOF

  • install_name

    lient.exe

  • log_directory

    Lugs

  • reconnect_delay

    3000

  • startup_key

    itartup

  • subdirectory

    SubDir

Targets

    • Target

      4f6212f670b6bc2372a97d6ecb2bfbeb.exe

    • Size

      1.4MB

    • MD5

      4f6212f670b6bc2372a97d6ecb2bfbeb

    • SHA1

      789b0d58500c5ca8d53df74edfadcf42f2e0c814

    • SHA256

      beeb985707b6f8539ad51664530bfb507ca9f65d9c1e6e716ca95f5d7e13291b

    • SHA512

      943e92afe2b3aab6929ad8c2b9334155cfca6d0fe954d13e183b975a5598fc6373f4690843ab6cece9a0c1cf42e0157b3c153c8a9297661d9fd7aa6b10a6b699

    • SSDEEP

      24576:U2G/nvxW3Ww0tRp8GiXTBhq7yRDvHcUcjUvy0lr3Tl6icOB/UWoT:UbA30H4zF0UMSAicOB/UWk

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Modifies Windows Firewall

    • ACProtect 1.3x - 1.4x DLL software

      Detects file using ACProtect software.

    • Executes dropped EXE

    • Loads dropped DLL

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Looks up external IP address via web service

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

MITRE ATT&CK Enterprise v15

Tasks