General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • Sample

    250103-bl13tatkb1

  • MD5

    7678d644944930e21d507388397b58e9

  • SHA1

    d4e6ccc7799dcddcca125f693332fa0d2eaec633

  • SHA256

    8ddc45e76a22fea557868cc10562e4b63bc7c824dad9fcccdbaa5a813b679acc

  • SHA512

    2767f9a907d2936d17e5e91ef8d86728e1b9a5fc26eb94206958bf3820ec5cf2704e6c2f05bfbc5717afb382dd908ba6cbd8b0a7fb3720770e57e57b41664871

  • SSDEEP

    49152:ev9t62XlaSFNWPjljiFa2RoUYIaxmriMfbLoGd6THHB72eh2NT:ev/62XlaSFNWPjljiFXRoUYIaxmrV

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.19:4782

Mutex

661876a4-75f0-45b4-b622-5207e929a109

Attributes
  • encryption_key

    CA0623419E058E855A1DFBA27E90975947AE225F

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    50

  • startup_key

    SubDir

  • subdirectory

    SubDir

Targets

    • Target

      Client-built.exe

    • Size

      3.1MB

    • MD5

      7678d644944930e21d507388397b58e9

    • SHA1

      d4e6ccc7799dcddcca125f693332fa0d2eaec633

    • SHA256

      8ddc45e76a22fea557868cc10562e4b63bc7c824dad9fcccdbaa5a813b679acc

    • SHA512

      2767f9a907d2936d17e5e91ef8d86728e1b9a5fc26eb94206958bf3820ec5cf2704e6c2f05bfbc5717afb382dd908ba6cbd8b0a7fb3720770e57e57b41664871

    • SSDEEP

      49152:ev9t62XlaSFNWPjljiFa2RoUYIaxmriMfbLoGd6THHB72eh2NT:ev/62XlaSFNWPjljiFXRoUYIaxmrV

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks