General

  • Target

    BruteL4-DDOS.exe

  • Size

    11.5MB

  • Sample

    240629-rk974ayhje

  • MD5

    cb885b1cae29af6524d341c65e486828

  • SHA1

    ef35f45fd7378e8fd31cd60f72bde21e75d61ada

  • SHA256

    bd95ec107878109859ff396ef71c76eb801ed4b25a167b49c8f0b8e112fbe361

  • SHA512

    9086e5a01178134876311086b14798e17d57f960c280b019e8f7e33fb68cdc494eb9be32918ec10314d8b8dfe289281567c82d132f1a5cf98288b8f133df2cde

  • SSDEEP

    196608:it1/NlcaCs41CIpX5kuyN7PaxTCv3Dl6TzMjqWEocUlMh7G0B43aK8Uut3kWXWK9:C/YDj1CCh2zax+vz0mazUWG0q3pZU0vq

Malware Config

Targets

    • Target

      BruteL4-DDOS.exe

    • Size

      11.5MB

    • MD5

      cb885b1cae29af6524d341c65e486828

    • SHA1

      ef35f45fd7378e8fd31cd60f72bde21e75d61ada

    • SHA256

      bd95ec107878109859ff396ef71c76eb801ed4b25a167b49c8f0b8e112fbe361

    • SHA512

      9086e5a01178134876311086b14798e17d57f960c280b019e8f7e33fb68cdc494eb9be32918ec10314d8b8dfe289281567c82d132f1a5cf98288b8f133df2cde

    • SSDEEP

      196608:it1/NlcaCs41CIpX5kuyN7PaxTCv3Dl6TzMjqWEocUlMh7G0B43aK8Uut3kWXWK9:C/YDj1CCh2zax+vz0mazUWG0q3pZU0vq

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Creates a large amount of network flows

      This may indicate a network scan to discover remotely running services.

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

    • Downloads MZ/PE file

    • Checks BIOS information in registry

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

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Discovery

Network Service Discovery

1
T1046

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Tasks