Analysis
- max time kernel
149s - max time network
127s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
22/10/2026, 19:09
General
- Target Grabber.exe
- Size 233KB
- Sample261022-xtt55aez2z
- SHA256 af336e16592ba5e5f9f1c9010a8e9d3d95aba4612a2cb4f70e45fa932194a18a
Malware Config
Signatures
- Family: Umbral
Umbral stealer is an open-source modular stealer written in C#.
- Detects Umbral payload 1 IoCs
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
- Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Looks up external IP address via web service 1 TTPs 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Queries system WMI classes for hardware identifiers 2 TTPs 1 IoCs
Uses WMI to read hardware serial numbers or the system UUID, commonly used to fingerprint the victim machine.
- Reads the TCP/IP host and domain name from the registry 1 TTPs 10 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.
- Suspicious behavior: EnumeratesProcesses 20 IoCs
- Suspicious use of AdjustPrivilegeToken 64 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Grabber.exe"C:\Users\Admin\AppData\Local\Temp\Grabber.exe"1⤵
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" os get Caption2⤵
- Reads the TCP/IP host and domain name from the registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" computersystem get totalphysicalmemory2⤵
- Reads the TCP/IP host and domain name from the registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Queries system WMI classes for hardware identifiers
- Reads the TCP/IP host and domain name from the registry
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\System32\Wbem\wmic.exe"wmic" path win32_VideoController get name2⤵
- Reads the TCP/IP host and domain name from the registry
- Detects videocard installed
- Suspicious behavior: EnumeratesProcesses
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Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1PowerShell
1Windows Management Instrumentation
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
StartupProfileData-NonInteractive
__PSScriptPolicyTest_uamtbl5n.3cu.psm1
memory/2376-17-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/2376-35-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/2376-24-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/2376-21-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/2376-16-0x00000236EBA00000-0x00000236EBA22000-memory.dmp
memory/2376-19-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/2376-18-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-5-0x000001E6678D0000-0x000001E667946000-memory.dmp
memory/3500-6-0x000001E64EEE0000-0x000001E64EF30000-memory.dmp
memory/3500-11-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-12-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-13-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-8-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-9-0x000001E64EE70000-0x000001E64EE8E000-memory.dmp
memory/3500-7-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-0-0x000001E64D020000-0x000001E64D060000-memory.dmp
memory/3500-10-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-4-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-3-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-2-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-27-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-30-0x000001E64EF30000-0x000001E64EF42000-memory.dmp
memory/3500-29-0x000001E64EEA0000-0x000001E64EEAA000-memory.dmp
memory/3500-34-0x00007FFCF2D40000-0x00007FFCF36E4000-memory.dmp
memory/3500-1-0x00007FFCF2ECF000-0x00007FFCF2ED0000-memory.dmp