Analysis
- max time kernel
149s - max time network
145s - platform
windows11-21h2_x64 - resource
win11-20251015-en - resource tags
- submitted
09/12/2025, 04:30
General
- Target StySwift003-D4900-D03PP-W20000P-K84902-E38992.exe
- Size 606KB
- Sample251209-e43adatndx
- SHA256 bfae3fe9b5fa79f729d2eeeaf21bb0d8d5b1080c3cc08c8d36a4d90f27a26064
Score
10/10
Malware Config
Signatures
- Guloader family
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Loads dropped DLL 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Drops file in System32 directory 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Drops file in Windows directory 3 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 behavior: MapViewOfSection 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\StySwift003-D4900-D03PP-W20000P-K84902-E38992.exe"C:\Users\Admin\AppData\Local\Temp\StySwift003-D4900-D03PP-W20000P-K84902-E38992.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\StySwift003-D4900-D03PP-W20000P-K84902-E38992.exe"C:\Users\Admin\AppData\Local\Temp\StySwift003-D4900-D03PP-W20000P-K84902-E38992.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\StySwift003-D4900-D03PP-W20000P-K84902-E38992.exe"C:\Users\Admin\AppData\Local\Temp\StySwift003-D4900-D03PP-W20000P-K84902-E38992.exe"2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\StySwift003-D4900-D03PP-W20000P-K84902-E38992.exe"C:\Users\Admin\AppData\Local\Temp\StySwift003-D4900-D03PP-W20000P-K84902-E38992.exe"3⤵
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
System.dll
memory/2892-23-0x0000000004510000-0x0000000006A4D000-memory.dmp
memory/2892-24-0x00000000747F5000-0x00000000747F6000-memory.dmp
memory/2892-25-0x0000000004510000-0x0000000006A4D000-memory.dmp
memory/3488-26-0x0000000000820000-0x0000000001B37000-memory.dmp
memory/3488-27-0x0000000001B40000-0x000000000407D000-memory.dmp