Analysis
- max time kernel
121s - max time network
121s - platform
windows7_x64 - resource
win7-20240903-en - resource tags
- submitted
06/02/2025, 06:52
General
- Target 858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe
- Size 542KB
- Sample250206-hnd5dsynbm
- SHA256 858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c
Malware Config
Signatures
- Guloader family
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Loads dropped DLL 1 IoCs
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Drops file in Program Files directory 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 behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe"C:\Users\Admin\AppData\Local\Temp\858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe"C:\Users\Admin\AppData\Local\Temp\858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe"2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
System.dll
memory/2228-13-0x00000000014F0000-0x0000000004E29000-memory.dmp
memory/2228-14-0x00000000774C0000-0x0000000077669000-memory.dmp
memory/2228-16-0x00000000774C0000-0x0000000077669000-memory.dmp
memory/2228-15-0x0000000000480000-0x00000000014E2000-memory.dmp
memory/2228-18-0x0000000000480000-0x000000000049E000-memory.dmp
memory/2228-17-0x00000000014F0000-0x0000000004E29000-memory.dmp
memory/2380-12-0x00000000774C0000-0x0000000077669000-memory.dmp
memory/2380-11-0x00000000774C1000-0x00000000775C2000-memory.dmp