General

  • Target

    11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2

  • Size

    4.6MB

  • Sample

    250419-mv1zystvgv

  • MD5

    3ed992586de3ed67aad864fe62734937

  • SHA1

    bcf4c8a3cbc671ba7fc6ac38b1581806913883dd

  • SHA256

    11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2

  • SHA512

    42668112eacf827325c88af0c6ec59c16b918f6f9772ef84e15a5ad8f0b5b6dd9643fe6d2467216c1374725b9c6cb742017ec7cebb6fb2763189d1d697f6ac37

  • SSDEEP

    98304:/gYSDiz3Clzp6QcwQhgBe8MFLgg5A4gmRGo1q0ZT:oHDcSNcwQhgBimwtH

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office05

C2

192.168.0.101:2025

Mutex

3f648fc9-2a82-4ca1-8687-e39e14478579

Attributes
  • encryption_key

    F3E6B52CEF8F81BA550B56134E7C52D02C97B9AA

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2

    • Size

      4.6MB

    • MD5

      3ed992586de3ed67aad864fe62734937

    • SHA1

      bcf4c8a3cbc671ba7fc6ac38b1581806913883dd

    • SHA256

      11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2

    • SHA512

      42668112eacf827325c88af0c6ec59c16b918f6f9772ef84e15a5ad8f0b5b6dd9643fe6d2467216c1374725b9c6cb742017ec7cebb6fb2763189d1d697f6ac37

    • SSDEEP

      98304:/gYSDiz3Clzp6QcwQhgBe8MFLgg5A4gmRGo1q0ZT:oHDcSNcwQhgBimwtH

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • 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.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v16

Tasks