Analysis
- max time kernel
148s - max time network
157s - platform
windows11-21h2_x64 - resource
win11-20260126-en - resource tags
- submitted
29/01/2026, 17:10
General
- Target 4e36d68bad9b0d15464ef5447ad6989ea3a173de265118d045444b0082a4dad8.exe
- Size 10.2MB
- Sample260129-vps16aaw3f
- SHA256 4e36d68bad9b0d15464ef5447ad6989ea3a173de265118d045444b0082a4dad8
Malware Config
Signatures
- Detects FSBStealer payload 1 IoCs
- FSBStealer
FSBStealer is a stealer written in C#.
- Fsb_stealer family
- Executes dropped EXE 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\4e36d68bad9b0d15464ef5447ad6989ea3a173de265118d045444b0082a4dad8.exe"C:\Users\Admin\AppData\Local\Temp\4e36d68bad9b0d15464ef5447ad6989ea3a173de265118d045444b0082a4dad8.exe"1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
-
C:\Users\Admin\AppData\Local\CyberShield\4e36d68bad9b0d15464ef5447ad6989ea3a173de265118d045444b0082a4dad8.exeC:\Users\Admin\AppData\Local\CyberShield\4e36d68bad9b0d15464ef5447ad6989ea3a173de265118d045444b0082a4dad8.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
4e36d68bad9b0d15464ef5447ad6989ea3a173de265118d045444b0082a4dad8.exe
memory/3396-14-0x00000000055F0000-0x0000000005600000-memory.dmp
memory/4616-3-0x0000000006C00000-0x00000000071A6000-memory.dmp
memory/4616-0-0x0000000000570000-0x0000000000FAE000-memory.dmp
memory/4616-4-0x0000000006750000-0x00000000067E2000-memory.dmp
memory/4616-5-0x000000000B2C0000-0x000000000B2C8000-memory.dmp
memory/4616-9-0x000000000B550000-0x000000000B588000-memory.dmp
memory/4616-10-0x000000000B530000-0x000000000B53E000-memory.dmp
memory/4616-11-0x0000000001AA0000-0x0000000001AB0000-memory.dmp
memory/4616-2-0x0000000001AA0000-0x0000000001AB0000-memory.dmp
memory/4616-1-0x0000000001AA0000-0x0000000001AB0000-memory.dmp
memory/4616-16-0x0000000007810000-0x0000000007876000-memory.dmp
memory/4616-17-0x0000000001AA0000-0x0000000001AB0000-memory.dmp
memory/4616-18-0x0000000001AA0000-0x0000000001AB0000-memory.dmp
memory/4616-19-0x0000000001AA0000-0x0000000001AB0000-memory.dmp