Analysis
- max time kernel
149s - max time network
128s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
24/09/2026, 06:20
General
- Target SecureCheck.exe
- Size 306KB
- Sample260924-g3rtcsfg86
- SHA256 ca5c9fd429e9ca758b80d8e156be05b53da4436d631b364e7f74e97d3c6bd8bf
Malware Config
Extracted
-
umbral
-
v1.3
-
https://discord.com/api/webhooks/1237029252285861910/k01vX69SAWif6kCqudGYITc6IvCQYHV-McHrHcg3rYSnnITUv5ViyFBuPb_ka1Cf0Ul3
Signatures
- Family: Umbral
Umbral stealer is an open-source modular stealer written in C#.
- Detects Umbral payload 2 IoCs
- 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.
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 43 IoCs
- Suspicious use of WriteProcessMemory 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\SecureCheck.exe"C:\Users\Admin\AppData\Local\Temp\SecureCheck.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
memory/4604-1-0x0000022138760000-0x00000221387B2000-memory.dmp
memory/4604-0-0x00007FF89FD7F000-0x00007FF89FD80000-memory.dmp
memory/4604-2-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4604-3-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4604-4-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4604-5-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4604-6-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4604-7-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp