Analysis
- max time kernel
147s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
11/01/2025, 04:49
General
- Target ad084a1c285369520a48712abaef5ebb566572f32e345d7e2356ada3fea0473f.exe
- Size 455KB
- Sample250111-ffrdmsvlay
- SHA256 ad084a1c285369520a48712abaef5ebb566572f32e345d7e2356ada3fea0473f
Malware Config
Signatures
- Guloader family
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Disables Task Manager via registry modification
- Loads dropped DLL 2 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
- Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 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.
- Drops file in System32 directory 1 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 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 5 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\ad084a1c285369520a48712abaef5ebb566572f32e345d7e2356ada3fea0473f.exe"C:\Users\Admin\AppData\Local\Temp\ad084a1c285369520a48712abaef5ebb566572f32e345d7e2356ada3fea0473f.exe"1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\ad084a1c285369520a48712abaef5ebb566572f32e345d7e2356ada3fea0473f.exe"C:\Users\Admin\AppData\Local\Temp\ad084a1c285369520a48712abaef5ebb566572f32e345d7e2356ada3fea0473f.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/1380-37-0x0000000037440000-0x00000000374D2000-memory.dmp
memory/1380-36-0x0000000036FB0000-0x000000003704C000-memory.dmp
memory/1380-40-0x00000000378D0000-0x00000000378DA000-memory.dmp
memory/1380-39-0x0000000037650000-0x0000000037812000-memory.dmp
memory/1380-18-0x00000000016C0000-0x0000000003D6A000-memory.dmp
memory/1380-31-0x0000000000460000-0x00000000016B4000-memory.dmp
memory/1380-38-0x00000000374E0000-0x0000000037530000-memory.dmp
memory/1380-34-0x0000000000460000-0x000000000047E000-memory.dmp
memory/1380-32-0x0000000000460000-0x00000000016B4000-memory.dmp
memory/1380-35-0x0000000036A00000-0x0000000036FA4000-memory.dmp
memory/1380-33-0x00000000016C0000-0x0000000003D6A000-memory.dmp
memory/2376-14-0x0000000002A60000-0x000000000510A000-memory.dmp
memory/2376-15-0x0000000077751000-0x0000000077871000-memory.dmp
memory/2376-17-0x0000000002A60000-0x000000000510A000-memory.dmp
memory/2376-16-0x0000000010004000-0x0000000010005000-memory.dmp