Overview

overview

10

Static

static

3

d546ccfe65...4b.exe

windows10-2004-x64

10

d546ccfe65...4b.exe

windows11-ltsc_2024-x64

6

Brasswork/striber.ps1

windows10-2004-x64

8

Brasswork/striber.ps1

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    10/08/2026, 17:17

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General

  • Target
    Brasswork/striber.ps1
  • Size 52KB
  • Sample260810-vtzphahe29
  • SHA256 93daa99dcce7c5d16d6cc5fd5dc089bb3514c31d91360b9420ea8f2a6b064de3
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
executionpersistenceransomware

Malware Config

Signatures

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

    execution
  • Checks SCSI registry key(s) 3 TTPs 58 IoCs

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

  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 44 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\Brasswork\striber.ps1
    1⤵
    • Command and Scripting Interpreter: PowerShell
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4224
  • C:\Windows\explorer.exe
    explorer.exe
    1⤵
    • Boot or Logon Autostart Execution: Active Setup
    • Enumerates connected drives
    • Checks SCSI registry key(s)
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of SetWindowsHookEx
    PID:2712
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Suspicious use of SetWindowsHookEx
    PID:2692
  • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
    "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2108

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        AppCache134308558770394431.txt
        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache134308558770394431.txt
        • Size 88KB
        • SHA256 a60eb30c0580bd7bd1b2e53fd3ad33e5decb33d0ab252fb81d2f4239481ad70e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        __PSScriptPolicyTest_jz3jdvqf.qzu.ps1
        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jz3jdvqf.qzu.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/2108-41-0x000001C848220000-0x000001C848240000-memory.dmp
        Download

        memory/2108-56-0x000001C848620000-0x000001C848640000-memory.dmp
        Download

        memory/2108-31-0x000001C848260000-0x000001C848280000-memory.dmp
        Download

        memory/2712-25-0x0000000004C10000-0x0000000004C11000-memory.dmp
        Download

        memory/4224-13-0x000001DE79AC0000-0x000001DE79AE4000-memory.dmp
        Download

        memory/4224-12-0x000001DE799B0000-0x000001DE799DA000-memory.dmp
        Download

        memory/4224-15-0x000001DE772D0000-0x000001DE772E0000-memory.dmp
        Download

        memory/4224-16-0x000001DE79570000-0x000001DE79574000-memory.dmp
        Download

        memory/4224-1-0x000001DE772D0000-0x000001DE772E0000-memory.dmp
        Download

        memory/4224-11-0x000001DE772D0000-0x000001DE772E0000-memory.dmp
        Download

        memory/4224-10-0x000001DE772D0000-0x000001DE772E0000-memory.dmp
        Download

        memory/4224-9-0x000001DE77260000-0x000001DE77282000-memory.dmp
        Download

        memory/4224-0-0x000001DE772D0000-0x000001DE772E0000-memory.dmp
        Download