General

  • Target

    Client-built.exe

  • Size

    502KB

  • Sample

    240727-xnjr7sxakg

  • MD5

    ba584f5d3b9cb7703256f08853a49f3e

  • SHA1

    59623f053627d043b833d66d2b6e858bae0a24ba

  • SHA256

    39845201dd846084359861286b4a612129c05c23f0d2a5bfc0eaf758b2398a72

  • SHA512

    13747f7b53918145beb4587056937f067f1b81a6a3a05508d2d311fd016d9b9fcb3a880073d2cb774609702af0e6f4e4de7ef6a24a06376cc6f55d11726d2664

  • SSDEEP

    6144:ITEgdc0YyXiPUEXaR8AdJ94borFzcDcSLNwcE5tb8FPVTar3Vlz0BgcTR38:ITEgdfYzUEIzlEdqpSk3V50Bgcd8

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

me:4782

Mutex

4e19accb-bc80-45aa-917d-d5dca33ad8f0

Attributes
  • encryption_key

    3B611D04AAFAB02940B8BD5BC8618AF575293F55

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    2996

  • startup_key

    system

  • subdirectory

    SubDir

Targets

    • Target

      Client-built.exe

    • Size

      502KB

    • MD5

      ba584f5d3b9cb7703256f08853a49f3e

    • SHA1

      59623f053627d043b833d66d2b6e858bae0a24ba

    • SHA256

      39845201dd846084359861286b4a612129c05c23f0d2a5bfc0eaf758b2398a72

    • SHA512

      13747f7b53918145beb4587056937f067f1b81a6a3a05508d2d311fd016d9b9fcb3a880073d2cb774609702af0e6f4e4de7ef6a24a06376cc6f55d11726d2664

    • SSDEEP

      6144:ITEgdc0YyXiPUEXaR8AdJ94borFzcDcSLNwcE5tb8FPVTar3Vlz0BgcTR38:ITEgdfYzUEIzlEdqpSk3V50Bgcd8

    • 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

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks