General

  • Target

    a6f1bb8e3f33f74c3c29b8dcb42682e2a55fb538bf4b6ae209cd99a7f4d6f7a9

  • Size

    1.4MB

  • Sample

    230801-rsw1fagc86

  • MD5

    44d1d8e4d730494f8c530cb4a5cf8bf0

  • SHA1

    b89946339beebb22c9e06e253cfccbd0f0a35ed9

  • SHA256

    a6f1bb8e3f33f74c3c29b8dcb42682e2a55fb538bf4b6ae209cd99a7f4d6f7a9

  • SHA512

    b0c156285fbed4d7a92c064d938525662c922f14fdef53137c1df1e6c96770736228fc1cb4f0016b27479e93b04a3ca832b2db918bf58bfc4662162b4729ed11

  • 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

      a6f1bb8e3f33f74c3c29b8dcb42682e2a55fb538bf4b6ae209cd99a7f4d6f7a9

    • Size

      1.4MB

    • MD5

      44d1d8e4d730494f8c530cb4a5cf8bf0

    • SHA1

      b89946339beebb22c9e06e253cfccbd0f0a35ed9

    • SHA256

      a6f1bb8e3f33f74c3c29b8dcb42682e2a55fb538bf4b6ae209cd99a7f4d6f7a9

    • SHA512

      b0c156285fbed4d7a92c064d938525662c922f14fdef53137c1df1e6c96770736228fc1cb4f0016b27479e93b04a3ca832b2db918bf58bfc4662162b4729ed11

    • 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