Analysis
- max time kernel
145s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
20/12/2024, 04:32
General
- Target 8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe
- Size 466KB
- Sample241220-e5383a1jak
- SHA256 8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969
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 1 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\8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe"C:\Users\Admin\AppData\Local\Temp\8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.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\8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe"C:\Users\Admin\AppData\Local\Temp\8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.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/644-37-0x00000000351A0000-0x0000000035744000-memory.dmp
memory/644-34-0x0000000000460000-0x00000000016B4000-memory.dmp
memory/644-43-0x0000000035F60000-0x0000000035F6A000-memory.dmp
memory/644-42-0x0000000035CE0000-0x0000000035EA2000-memory.dmp
memory/644-18-0x00000000016C0000-0x00000000023FF000-memory.dmp
memory/644-19-0x00000000775C8000-0x00000000775C9000-memory.dmp
memory/644-20-0x00000000775E5000-0x00000000775E6000-memory.dmp
memory/644-33-0x00000000016C0000-0x00000000023FF000-memory.dmp
memory/644-41-0x0000000035B40000-0x0000000035B90000-memory.dmp
memory/644-36-0x0000000000460000-0x000000000047E000-memory.dmp
memory/644-35-0x0000000077541000-0x0000000077661000-memory.dmp
memory/644-40-0x0000000035A90000-0x0000000035B22000-memory.dmp
memory/644-38-0x0000000035040000-0x00000000350DC000-memory.dmp
memory/3016-14-0x0000000002B10000-0x000000000384F000-memory.dmp
memory/3016-15-0x0000000077541000-0x0000000077661000-memory.dmp
memory/3016-17-0x0000000002B10000-0x000000000384F000-memory.dmp
memory/3016-16-0x0000000010004000-0x0000000010005000-memory.dmp