General

  • Target

    c5771e769360e622765173e2845bae54b79092ad52c0cbf4c52b668b4e740272

  • Size

    1.4MB

  • Sample

    241101-v3zqvs1qdz

  • MD5

    f26ef938c2c4235c5e4cdb4ebb801fca

  • SHA1

    7c3413c638ea0c93cf2951cf05249df89bd98ff8

  • SHA256

    c5771e769360e622765173e2845bae54b79092ad52c0cbf4c52b668b4e740272

  • SHA512

    84d9d421b6794d412f55d8db296d55b46d25c0980da4a75eacf39d9ad912403bfd0a09142c907328df47b0a676826bd8a0ac422d6e89541da5ca49c13f073096

  • 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

      c5771e769360e622765173e2845bae54b79092ad52c0cbf4c52b668b4e740272

    • Size

      1.4MB

    • MD5

      f26ef938c2c4235c5e4cdb4ebb801fca

    • SHA1

      7c3413c638ea0c93cf2951cf05249df89bd98ff8

    • SHA256

      c5771e769360e622765173e2845bae54b79092ad52c0cbf4c52b668b4e740272

    • SHA512

      84d9d421b6794d412f55d8db296d55b46d25c0980da4a75eacf39d9ad912403bfd0a09142c907328df47b0a676826bd8a0ac422d6e89541da5ca49c13f073096

    • SSDEEP

      24576:U2G/nvxW3Ww0tRp8GiXTBhq7yRDvHcUcjUvy0lr3Tl6icOB/UWoT:UbA30H4zF0UMSAicOB/UWk

    • Modifies WinLogon for persistence

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • 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

    • Unexpected DNS network traffic destination

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

    • Adds Run key to start application

    • Looks up external IP address via web service

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

    • Suspicious use of SetThreadContext

    • UPX packed file

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

MITRE ATT&CK Enterprise v15

Tasks