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General

  • Target

    863853779cb75e604f7f561e9d6aaeb2b6dab6209b1b45a4224baf6487a19d5e

  • Size

    1.4MB

  • Sample

    231014-amrebsfe4y

  • MD5

    0dad74135677936499c2ff723c0a9712

  • SHA1

    37897e154481cd6634527afd05731f6eccc9dd64

  • SHA256

    863853779cb75e604f7f561e9d6aaeb2b6dab6209b1b45a4224baf6487a19d5e

  • SHA512

    3a01cf85838f62ce1a73642079f747be292507d395cbf786e912da47986024a447479c2ebc9dc5d05884741f159b0582bf79d1e2eb16a6e9e51d54590b6b7c07

  • 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

      863853779cb75e604f7f561e9d6aaeb2b6dab6209b1b45a4224baf6487a19d5e

    • Size

      1.4MB

    • MD5

      0dad74135677936499c2ff723c0a9712

    • SHA1

      37897e154481cd6634527afd05731f6eccc9dd64

    • SHA256

      863853779cb75e604f7f561e9d6aaeb2b6dab6209b1b45a4224baf6487a19d5e

    • SHA512

      3a01cf85838f62ce1a73642079f747be292507d395cbf786e912da47986024a447479c2ebc9dc5d05884741f159b0582bf79d1e2eb16a6e9e51d54590b6b7c07

    • 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.

    • Checks computer location settings

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

    • 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