Analysis
- max time kernel
149s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20250129-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 local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 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.
- 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: EnumeratesProcesses 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 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⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
System.dll
memory/1336-19-0x000000007304E000-0x000000007304F000-memory.dmp
memory/1336-23-0x0000000073040000-0x00000000737F0000-memory.dmp
memory/1336-12-0x00000000016E0000-0x0000000005019000-memory.dmp
memory/1336-13-0x0000000077E31000-0x0000000077F51000-memory.dmp
memory/1336-14-0x0000000077EB8000-0x0000000077EB9000-memory.dmp
memory/1336-15-0x0000000077ED5000-0x0000000077ED6000-memory.dmp
memory/1336-16-0x0000000000480000-0x00000000016D4000-memory.dmp
memory/1336-17-0x0000000077E31000-0x0000000077F51000-memory.dmp
memory/1336-30-0x0000000073040000-0x00000000737F0000-memory.dmp
memory/1336-29-0x000000007304E000-0x000000007304F000-memory.dmp
memory/1336-22-0x0000000037910000-0x00000000379AC000-memory.dmp
memory/1336-21-0x0000000037A10000-0x0000000037FB4000-memory.dmp
memory/1336-20-0x0000000000480000-0x000000000049E000-memory.dmp
memory/1336-18-0x00000000016E0000-0x0000000005019000-memory.dmp
memory/1336-24-0x0000000038080000-0x00000000380D0000-memory.dmp
memory/1336-26-0x0000000038760000-0x0000000038922000-memory.dmp
memory/1336-27-0x0000000038930000-0x00000000389C2000-memory.dmp
memory/1336-28-0x0000000038A30000-0x0000000038A3A000-memory.dmp
memory/5104-11-0x0000000074C95000-0x0000000074C96000-memory.dmp
memory/5104-10-0x0000000077E31000-0x0000000077F51000-memory.dmp