General

  • Target

    391d5b55a86f7b184573a7080cd0bc77c0aa7bcc282a54b33eeedec3271bcab7

  • Size

    1.4MB

  • Sample

    230801-dg573sch23

  • MD5

    db53f74b7b41bc839532e5ffcde78289

  • SHA1

    f401779d9496ff3e930f3dd677681857f8bf3d10

  • SHA256

    391d5b55a86f7b184573a7080cd0bc77c0aa7bcc282a54b33eeedec3271bcab7

  • SHA512

    0d545afeaefefb54b987e687654c6f76f3eaa75c47df5cfb61f2a7e095507e73373bb65196aa0d2f4f391979e80a579d62b51e15dc578706a8218929184cd35f

  • 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

      391d5b55a86f7b184573a7080cd0bc77c0aa7bcc282a54b33eeedec3271bcab7

    • Size

      1.4MB

    • MD5

      db53f74b7b41bc839532e5ffcde78289

    • SHA1

      f401779d9496ff3e930f3dd677681857f8bf3d10

    • SHA256

      391d5b55a86f7b184573a7080cd0bc77c0aa7bcc282a54b33eeedec3271bcab7

    • SHA512

      0d545afeaefefb54b987e687654c6f76f3eaa75c47df5cfb61f2a7e095507e73373bb65196aa0d2f4f391979e80a579d62b51e15dc578706a8218929184cd35f

    • SSDEEP

      24576:U2G/nvxW3Ww0tRp8GiXTBhq7yRDvHcUcjUvy0lr3Tl6icOB/UWoT:UbA30H4zF0UMSAicOB/UWk

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Blocklisted process makes network request

    • Modifies Windows Firewall

    • ACProtect 1.3x - 1.4x DLL software

      Detects file using ACProtect software.

    • 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