General

  • Target

    d033f99723109ae7a00f9861bfea7e8b.exe

  • Size

    1.4MB

  • Sample

    230801-mz4xeafd23

  • MD5

    d033f99723109ae7a00f9861bfea7e8b

  • SHA1

    b6dbb1d6654ec62fa1925f8ca3ea9b73bfbe5746

  • SHA256

    dcbbadb9460751f4a7684af8b8bb8c78f3327b066445100d277af5c01f184f4e

  • SHA512

    13fd16b656d7dcd2f8027b082084fb4d0bb7f5f924c1db8bd027664a2cce26f20f2b41a6c2b5924a78a2641f1cacfa67e7998797b2b57836d1a1e5cc517eb91e

  • 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

      d033f99723109ae7a00f9861bfea7e8b.exe

    • Size

      1.4MB

    • MD5

      d033f99723109ae7a00f9861bfea7e8b

    • SHA1

      b6dbb1d6654ec62fa1925f8ca3ea9b73bfbe5746

    • SHA256

      dcbbadb9460751f4a7684af8b8bb8c78f3327b066445100d277af5c01f184f4e

    • SHA512

      13fd16b656d7dcd2f8027b082084fb4d0bb7f5f924c1db8bd027664a2cce26f20f2b41a6c2b5924a78a2641f1cacfa67e7998797b2b57836d1a1e5cc517eb91e

    • 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