General

  • Target

    9740b8125ee7514574c5abf44f81b0093fb835c96be4ee008664ffda7ac4c0d2

  • Size

    1.4MB

  • Sample

    231012-jbqs4agb68

  • MD5

    2ca1d8c2ed7a7a6f8580a6f9797c473e

  • SHA1

    02d8f11b4b3076ce6fff19a75a9f6e565135b490

  • SHA256

    9740b8125ee7514574c5abf44f81b0093fb835c96be4ee008664ffda7ac4c0d2

  • SHA512

    d43df5e64108c77f947884615d5fefedf9b6a4a8cd66acc0449a1f24d7e3eefe3c67afcbc1e25969e5e37ff079d9b8272bfc3bddc2a9b3ca3ae64055991c3f99

  • 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

      9740b8125ee7514574c5abf44f81b0093fb835c96be4ee008664ffda7ac4c0d2

    • Size

      1.4MB

    • MD5

      2ca1d8c2ed7a7a6f8580a6f9797c473e

    • SHA1

      02d8f11b4b3076ce6fff19a75a9f6e565135b490

    • SHA256

      9740b8125ee7514574c5abf44f81b0093fb835c96be4ee008664ffda7ac4c0d2

    • SHA512

      d43df5e64108c77f947884615d5fefedf9b6a4a8cd66acc0449a1f24d7e3eefe3c67afcbc1e25969e5e37ff079d9b8272bfc3bddc2a9b3ca3ae64055991c3f99

    • 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