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Analysis

  • max time kernel
    140s
  • max time network
    97s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    07/09/2024, 03:48

General

  • Target

    weave.exe

  • Size

    3.1MB

  • MD5

    a1b6a96519aaa206ac30aad7088e3242

  • SHA1

    04bf79e8c40f4cda2a4b345ef1467e159bdb0fae

  • SHA256

    7dd55d5932f394089ef875e89fb0c92edfa507ce096715e4928e08a0001079cd

  • SHA512

    430fa2394e0a338f0fdb9efd6ce14ccab6ed4d0367e2ac58becef37a0f78b9d0675a33f6e7234fe76df29b39e7a16cfc097c89b3c78d5224ae669d928b11e086

  • SSDEEP

    98304:dV5Cx40FHvu+ST0sI0aT7qrloC3Y2dSB6rWo4Bud5:FM40FGtAjrT7kloC3Y24ri

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Themida packer 4 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\weave.exe
    "C:\Users\Admin\AppData\Local\Temp\weave.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of WriteProcessMemory
    PID:4920
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c powershell -Command "Add-MpPreference -ExclusionPath 'C:\windows\system32'" > NUL 2>&1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3320
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -Command "Add-MpPreference -ExclusionPath 'C:\windows\system32'"
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4368
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c cls
      2⤵
        PID:3352

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xfd0lrzs.dkx.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • memory/4368-13-0x0000020BCAD10000-0x0000020BCAD32000-memory.dmp

      Filesize

      136KB

    • memory/4368-2-0x00007FFA03520000-0x00007FFA03729000-memory.dmp

      Filesize

      2.0MB

    • memory/4368-3-0x00007FFA03520000-0x00007FFA03729000-memory.dmp

      Filesize

      2.0MB

    • memory/4368-4-0x00007FFA03520000-0x00007FFA03729000-memory.dmp

      Filesize

      2.0MB

    • memory/4368-14-0x00007FFA03520000-0x00007FFA03729000-memory.dmp

      Filesize

      2.0MB

    • memory/4368-15-0x00007FFA03520000-0x00007FFA03729000-memory.dmp

      Filesize

      2.0MB

    • memory/4368-18-0x00007FFA03520000-0x00007FFA03729000-memory.dmp

      Filesize

      2.0MB

    • memory/4920-1-0x00007FFA035C7000-0x00007FFA035C9000-memory.dmp

      Filesize

      8KB

    • memory/4920-0-0x00007FF7D4D70000-0x00007FF7D5612000-memory.dmp

      Filesize

      8.6MB

    • memory/4920-19-0x00007FF7D4D70000-0x00007FF7D5612000-memory.dmp

      Filesize

      8.6MB

    • memory/4920-20-0x00007FF7D4D70000-0x00007FF7D5612000-memory.dmp

      Filesize

      8.6MB

    • memory/4920-25-0x00007FF7D4D70000-0x00007FF7D5612000-memory.dmp

      Filesize

      8.6MB