Overview

overview

8

Static

static

3

0ec8881736...27.exe

windows10-2004-x64

8

0ec8881736...27.exe

windows11-ltsc_2024-x64

8

Caoutchouc.ps1

windows10-2004-x64

8

Caoutchouc.ps1

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    27/07/2026, 00:50

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General

  • Target
    Caoutchouc.ps1
  • Size 56KB
  • Sample260727-a69p1stdre
  • SHA256 144ca70bdfab8abe347591eb3e32f2c13e23eaf87a0a668f89c82c782a558609
  • 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 54 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 45 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\Caoutchouc.ps1
    1⤵
    • Command and Scripting Interpreter: PowerShell
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:5816
  • 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:6092
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:5972
  • 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:3896

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        AppCache134295870611451206.txt
        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache134295870611451206.txt
        • Size 84KB
        • SHA256 3fd48833d5bdb8378bcc3f8c1a98b8430878af9cadfa590ec87b6ca1a7f830e7
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        __PSScriptPolicyTest_ipbhinsv.1na.ps1
        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ipbhinsv.1na.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/3896-23-0x000002D801600000-0x000002D801700000-memory.dmp
        Download

        memory/3896-59-0x000002D8028A0000-0x000002D8028C0000-memory.dmp
        Download

        memory/3896-40-0x000002D802280000-0x000002D8022A0000-memory.dmp
        Download

        memory/3896-28-0x000002D8022C0000-0x000002D8022E0000-memory.dmp
        Download

        memory/5816-10-0x0000019A99BE0000-0x0000019A99BF0000-memory.dmp
        Download

        memory/5816-13-0x0000019AFFA50000-0x0000019AFFA74000-memory.dmp
        Download

        memory/5816-15-0x0000019A99BE0000-0x0000019A99BF0000-memory.dmp
        Download

        memory/5816-16-0x0000019A9C380000-0x0000019A9C382000-memory.dmp
        Download

        memory/5816-12-0x0000019AFFA50000-0x0000019AFFA7A000-memory.dmp
        Download

        memory/5816-11-0x0000019A99BE0000-0x0000019A99BF0000-memory.dmp
        Download

        memory/5816-0-0x0000019A99BE0000-0x0000019A99BF0000-memory.dmp
        Download

        memory/5816-2-0x0000019AFFA20000-0x0000019AFFA42000-memory.dmp
        Download

        memory/5816-1-0x0000019A99BE0000-0x0000019A99BF0000-memory.dmp
        Download

        memory/6092-22-0x00000000036E0000-0x00000000036E1000-memory.dmp
        Download