General

  • Target

    3522d8fe0b3cb7126fcf9ab74405cd6bc29a93001bc23854941d90fc7fcf3390

  • Size

    938KB

  • Sample

    250218-1rvknazner

  • MD5

    f8363b39122ec442ddf9d5064da011dd

  • SHA1

    edc3a725b2e83e15d7f002b8fd249348e7725737

  • SHA256

    3522d8fe0b3cb7126fcf9ab74405cd6bc29a93001bc23854941d90fc7fcf3390

  • SHA512

    e9e4eb4675ab3f5ec8653f5b131b3d2f4c74b4bf2208fceecf87b707e54adbb8107b5ce4f3339297e88f58aaf1bce46ed1631ae03e99f8143672e1c264392a3c

  • SSDEEP

    24576:6qDEvCTbMWu7rQYlBQcBiT6rprG8aeKl:6TvC/MTQYxsWR7aeK

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

http://185.215.113.16/defend/random.exe

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

http://185.215.113.16/defend/random.exe

Targets

    • Target

      3522d8fe0b3cb7126fcf9ab74405cd6bc29a93001bc23854941d90fc7fcf3390

    • Size

      938KB

    • MD5

      f8363b39122ec442ddf9d5064da011dd

    • SHA1

      edc3a725b2e83e15d7f002b8fd249348e7725737

    • SHA256

      3522d8fe0b3cb7126fcf9ab74405cd6bc29a93001bc23854941d90fc7fcf3390

    • SHA512

      e9e4eb4675ab3f5ec8653f5b131b3d2f4c74b4bf2208fceecf87b707e54adbb8107b5ce4f3339297e88f58aaf1bce46ed1631ae03e99f8143672e1c264392a3c

    • SSDEEP

      24576:6qDEvCTbMWu7rQYlBQcBiT6rprG8aeKl:6TvC/MTQYxsWR7aeK

    • Detects Healer an antivirus disabler dropper

    • Healer

      Healer an antivirus disabler dropper.

    • Healer family

    • Modifies Windows Defender DisableAntiSpyware settings

    • Modifies Windows Defender Real-time Protection settings

    • Modifies Windows Defender TamperProtection settings

    • Modifies Windows Defender notification settings

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

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • 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

    • Identifies Wine through registry keys

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

    • Loads dropped DLL

    • Windows security modification

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks