General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • Sample

    240805-vqp1wswfne

  • MD5

    66f3aa9e7180faae997c633fc1e03140

  • SHA1

    90bc7af0951b32880d50dccba3a5cbb2eb97eec0

  • SHA256

    41534fb7a8ececd82806a9f0ececd74695e1f2a0a086a3be0cc79999c30d07b3

  • SHA512

    2c6884ec5e556d66dad7d95922f33a53ce15a01d6e869e8808638f03cde53e0c8ee845544302b88b7e9387b9de069ddbcdf506057dec78e318d0c45c532eda9d

  • SSDEEP

    49152:OvEt62XlaSFNWPjljiFa2RoUYIMbsRJ63bR3LoGdETHHB72eh2NT:OvY62XlaSFNWPjljiFXRoUYIMoRJ6J

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

172.27.16.1:4782

Mutex

a71c5487-2d0f-4941-9dbe-f60cb458c959

Attributes
  • encryption_key

    5D1BA65461E2393B1E9F354F2BA00745F17296D8

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Update

  • subdirectory

    SubDir

Targets

    • Target

      Client-built.exe

    • Size

      3.1MB

    • MD5

      66f3aa9e7180faae997c633fc1e03140

    • SHA1

      90bc7af0951b32880d50dccba3a5cbb2eb97eec0

    • SHA256

      41534fb7a8ececd82806a9f0ececd74695e1f2a0a086a3be0cc79999c30d07b3

    • SHA512

      2c6884ec5e556d66dad7d95922f33a53ce15a01d6e869e8808638f03cde53e0c8ee845544302b88b7e9387b9de069ddbcdf506057dec78e318d0c45c532eda9d

    • SSDEEP

      49152:OvEt62XlaSFNWPjljiFa2RoUYIMbsRJ63bR3LoGdETHHB72eh2NT:OvY62XlaSFNWPjljiFXRoUYIMoRJ6J

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks