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Resubmissions

08/09/2024, 20:04

240908-ytdntawame 10

08/09/2024, 19:15

240908-xx8gxstgkh 9

General

  • Target

    Bootstrapper.exe

  • Size

    796KB

  • Sample

    240908-xx8gxstgkh

  • MD5

    5f16b82a8b62d4cc9d6ce02f44e34109

  • SHA1

    be96254773cba2c6f0b88e51319802b1c6394beb

  • SHA256

    1621a516abb8ecf9459c9dec83f7fb9beb07af1f79511dfe0b3c622297ffa940

  • SHA512

    956d983c7f076b176bfd1952e691e2d363c332dba317645ce991c9bb2f4ddd89771f0d035cbb70ab420b9dd906b3a6d0aecc6c8243ba6a4ac70979cebb00986b

  • SSDEEP

    3072:nTaFZMwaCyYwC+M2FEv80IZOA/CyYwC+M2FEv80IZOAu80IZOA4:lhY7X2Kvh4hY7X2Kvhlh

Malware Config

Targets

    • Target

      Bootstrapper.exe

    • Size

      796KB

    • MD5

      5f16b82a8b62d4cc9d6ce02f44e34109

    • SHA1

      be96254773cba2c6f0b88e51319802b1c6394beb

    • SHA256

      1621a516abb8ecf9459c9dec83f7fb9beb07af1f79511dfe0b3c622297ffa940

    • SHA512

      956d983c7f076b176bfd1952e691e2d363c332dba317645ce991c9bb2f4ddd89771f0d035cbb70ab420b9dd906b3a6d0aecc6c8243ba6a4ac70979cebb00986b

    • SSDEEP

      3072:nTaFZMwaCyYwC+M2FEv80IZOA/CyYwC+M2FEv80IZOAu80IZOA4:lhY7X2Kvh4hY7X2Kvhlh

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

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Downloads MZ/PE file

    • Event Triggered Execution: Image File Execution Options Injection

    • Checks BIOS information in registry

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

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Executes dropped EXE

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Blocklisted process makes network request

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Legitimate hosting services abused for malware hosting/C2

    • Network Share Discovery

      Attempt to gather information on host network.

    • Checks system information in the registry

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

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks