Analysis

  • max time kernel
    175s
  • max time network
    187s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 04:32

General

  • Target

    NativeDecompress.dll

  • Size

    1.2MB

  • MD5

    84b679ddb4975de2d2fc0e1a37042ac5

  • SHA1

    5e80e5df5514ce5603578c738a63210ef4c2f55e

  • SHA256

    64284f7cddd51086946191dbaaf1d23869b99ef47892f250682c2d568aa874f5

  • SHA512

    3c574ed06b7d798c1f92dad6019ee510b660fcb2267f91528cfcc94c96a003f55504d534aaea694baa87a21665c8c180e4e1ad5735041a779336f2996062ec2a

Score
9/10

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\NativeDecompress.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2744
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\NativeDecompress.dll,#1
      2⤵
      • Checks BIOS information in registry
      • Identifies Wine through registry keys
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      PID:4824
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4824 -s 708
        3⤵
        • Program crash
        PID:2696
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 196 -p 4824 -ip 4824
    1⤵
      PID:5080

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Virtualization/Sandbox Evasion

    2
    T1497

    Discovery

    Query Registry

    3
    T1012

    Virtualization/Sandbox Evasion

    2
    T1497

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/4824-130-0x0000000000000000-mapping.dmp
    • memory/4824-131-0x0000000077550000-0x00000000776F3000-memory.dmp
      Filesize

      1.6MB