General

  • Target

    Client.exe

  • Size

    3.1MB

  • Sample

    240414-q5j1zaha32

  • MD5

    1109da1db2b4175b38ae1bc7c881db9a

  • SHA1

    02b92b5e6aa54ae040bc5cd5e845287be01c9562

  • SHA256

    0aadcb147077d657fd68e222689a25d93c40144d54922c83b4171a5e801235c5

  • SHA512

    44cc1ee0e92159f4d41b4b1c9ae52a7b208b7888c5864795f1e815725d26677e2c7f4fce6410a8cfa8e07c8ee19c3f07f4110c64f1eca62d2f6bbf4cdda8f952

  • SSDEEP

    49152:rvbI22SsaNYfdPBldt698dBcjHRTaxzBxL9aGdg6STHHB72eh2NT:rvk22SsaNYfdPBldt6+dBcjHRTaxh

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

140.238.91.110:34309

Mutex

d748a36c-8402-4813-815d-0daea2ec5f51

Attributes
  • encryption_key

    312796590553474EC6AA07D7A09E6A1B8FA1043A

  • install_name

    dllhostx64.exe

  • log_directory

    Error Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Boot Menu

  • subdirectory

    Windows

Targets

    • Target

      Client.exe

    • Size

      3.1MB

    • MD5

      1109da1db2b4175b38ae1bc7c881db9a

    • SHA1

      02b92b5e6aa54ae040bc5cd5e845287be01c9562

    • SHA256

      0aadcb147077d657fd68e222689a25d93c40144d54922c83b4171a5e801235c5

    • SHA512

      44cc1ee0e92159f4d41b4b1c9ae52a7b208b7888c5864795f1e815725d26677e2c7f4fce6410a8cfa8e07c8ee19c3f07f4110c64f1eca62d2f6bbf4cdda8f952

    • SSDEEP

      49152:rvbI22SsaNYfdPBldt698dBcjHRTaxzBxL9aGdg6STHHB72eh2NT:rvk22SsaNYfdPBldt6+dBcjHRTaxh

    • 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