Analysis
- max time kernel
898s - max time network
489s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
27/10/2026, 12:38
General
- Target steamapps/common/Osta/Osta.exe
- Size 392KB
- Sample261027-pvccpstyaw
- SHA256 77c6862ac81399f3acc4d15388c3ccf760631d074815fabce5728a17baf00085
Score
7/10
Malware Config
Signatures
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\steamapps\common\Osta\Osta.exe"C:\Users\Admin\AppData\Local\Temp\steamapps\common\Osta\Osta.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\steamapps\common\Osta\Engine\Extras\Redist\en-us\UEPrereqSetup_x64.exe"C:\Users\Admin\AppData\Local\Temp\steamapps\common\Osta\Engine\Extras\Redist\en-us\UEPrereqSetup_x64.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\steamapps\common\Osta\Engine\Extras\Redist\en-us\UEPrereqSetup_x64.exe"C:\Users\Admin\AppData\Local\Temp\steamapps\common\Osta\Engine\Extras\Redist\en-us\UEPrereqSetup_x64.exe" -burn.unelevated BurnPipe.{04A9107B-C971-46C5-825D-B7686939423F} {035E2AD7-6D9B-427E-B92A-1E1EEC57FDE3} 8723⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
-
-
Network
MITRE ATT&CK Enterprise v16
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Downloads
Banner.bmp
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wixstdba.dll