General

  • Target

    4e3983725a2a9d13964daab871bb80dd53cf622720d3ee2fb238e828f838c315

  • Size

    6.1MB

  • Sample

    240526-rtf1lsac79

  • MD5

    9e7fb76f5fd5ead7c3245a874abd6a3e

  • SHA1

    fb2d2fb7b08ee61187ccf9188b7c5905006a0a6d

  • SHA256

    4e3983725a2a9d13964daab871bb80dd53cf622720d3ee2fb238e828f838c315

  • SHA512

    75b30932d2884f209f54f3cc72755cf1a4256be376d6b168f61f3cb0dd098c7e3c1ab8c640a3a9e5985cbc1203d74867b0a28c17e84720433f8e6270792a55c1

  • SSDEEP

    98304:u6vzOve+1npo85PKknn/G8ccoODEp4qpznJcHIwSD9HrNTTaGNqbbc4mty:uT2+1uoPvn+RcoP3pqH1kNijbzz

Malware Config

Targets

    • Target

      4e3983725a2a9d13964daab871bb80dd53cf622720d3ee2fb238e828f838c315

    • Size

      6.1MB

    • MD5

      9e7fb76f5fd5ead7c3245a874abd6a3e

    • SHA1

      fb2d2fb7b08ee61187ccf9188b7c5905006a0a6d

    • SHA256

      4e3983725a2a9d13964daab871bb80dd53cf622720d3ee2fb238e828f838c315

    • SHA512

      75b30932d2884f209f54f3cc72755cf1a4256be376d6b168f61f3cb0dd098c7e3c1ab8c640a3a9e5985cbc1203d74867b0a28c17e84720433f8e6270792a55c1

    • SSDEEP

      98304:u6vzOve+1npo85PKknn/G8ccoODEp4qpznJcHIwSD9HrNTTaGNqbbc4mty:uT2+1uoPvn+RcoP3pqH1kNijbzz

    • 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.

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    • Checks whether UAC is enabled

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

2
T1082

Tasks