General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • Sample

    240408-j1snzscf22

  • MD5

    43d43e073f37fcbce4db2a8efea58450

  • SHA1

    24014a045dfda1401b81e63435fdf46963967fd4

  • SHA256

    e4c6e99ac6e6ddb98b3f0fea20d97c067b593ffdce6d2909ff693d03868e605b

  • SHA512

    9c8ca9dee9c24431ea98ce9743cf826b5ba844c339b0cc94ef4261af68f2bf89b7251e1884011e8ff58be5afbebe98b699a243d1cacf83272018baac439ca9bf

  • SSDEEP

    49152:3v1t62XlaSFNWPjljiFa2RoUYI4xDEDwNk/JxSoGdk+THHB72eh2NT:3vH62XlaSFNWPjljiFXRoUYI4xWQU

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

IPv4:4782

Mutex

865ecc2b-abfd-4e2c-92cb-d87fb0c27dfe

Attributes
  • encryption_key

    4EC818ABEB58692E09D25328E09F987FEC20E0DF

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      Client-built.exe

    • Size

      3.1MB

    • MD5

      43d43e073f37fcbce4db2a8efea58450

    • SHA1

      24014a045dfda1401b81e63435fdf46963967fd4

    • SHA256

      e4c6e99ac6e6ddb98b3f0fea20d97c067b593ffdce6d2909ff693d03868e605b

    • SHA512

      9c8ca9dee9c24431ea98ce9743cf826b5ba844c339b0cc94ef4261af68f2bf89b7251e1884011e8ff58be5afbebe98b699a243d1cacf83272018baac439ca9bf

    • SSDEEP

      49152:3v1t62XlaSFNWPjljiFa2RoUYI4xDEDwNk/JxSoGdk+THHB72eh2NT:3vH62XlaSFNWPjljiFXRoUYI4xWQU

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

MITRE ATT&CK Enterprise v15

Tasks