General

  • Target

    278d30b853f49e6a13cbe9f34f1d41ca

  • Size

    5.6MB

  • Sample

    231231-eqqpesacg3

  • MD5

    278d30b853f49e6a13cbe9f34f1d41ca

  • SHA1

    035df2a06e5d41e3846e80e48f23b8a910c43e69

  • SHA256

    42f38e100ef58aface240a755a20d02d55a574e7c8c78724ec5e062948d07a54

  • SHA512

    3c9106d22fe264643641429b4845f4b157ec1dac42f67c2692156c0649ef32019dcf6c6f11adfc476b91ccac7b8ce41f336b58ff0857cf669967449e30063e6d

  • SSDEEP

    98304:6nzQFlgYbe8fNk7GZHJPGMoSYf/DZegHkPFB/bBqwVUhwNCTqNLdcqEpdnNpBpEd:+z+2We81k7W1PoVZxCFBZCXSLdb2d2

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

mushiyu123123.f3322.org:50050

Mutex

QSR_MUTEX_kU6R4WcEnrRpV1pmT3

Attributes
  • encryption_key

    biuAuxCALf3qLcsJPIYC

  • install_name

    smss.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    c3pool

  • subdirectory

    c3pool

Targets

    • Target

      278d30b853f49e6a13cbe9f34f1d41ca

    • Size

      5.6MB

    • MD5

      278d30b853f49e6a13cbe9f34f1d41ca

    • SHA1

      035df2a06e5d41e3846e80e48f23b8a910c43e69

    • SHA256

      42f38e100ef58aface240a755a20d02d55a574e7c8c78724ec5e062948d07a54

    • SHA512

      3c9106d22fe264643641429b4845f4b157ec1dac42f67c2692156c0649ef32019dcf6c6f11adfc476b91ccac7b8ce41f336b58ff0857cf669967449e30063e6d

    • SSDEEP

      98304:6nzQFlgYbe8fNk7GZHJPGMoSYf/DZegHkPFB/bBqwVUhwNCTqNLdcqEpdnNpBpEd:+z+2We81k7W1PoVZxCFBZCXSLdb2d2

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Executes dropped EXE

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Checks whether UAC is enabled

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks