Analysis
- max time kernel
148s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
19/12/2024, 04:33
General
- Target fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
- Size 434KB
- Sample241219-e6pr3azjbp
- SHA256 fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963
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\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe"C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.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\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe"C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.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/4440-14-0x0000000002A60000-0x0000000003C58000-memory.dmp
memory/4440-15-0x0000000077B01000-0x0000000077C21000-memory.dmp
memory/4440-16-0x0000000010004000-0x0000000010005000-memory.dmp
memory/4440-17-0x0000000002A60000-0x0000000003C58000-memory.dmp
memory/4888-18-0x00000000016C0000-0x00000000028B8000-memory.dmp
memory/4888-19-0x0000000077B88000-0x0000000077B89000-memory.dmp
memory/4888-20-0x0000000077BA5000-0x0000000077BA6000-memory.dmp
memory/4888-30-0x00000000016C0000-0x00000000028B8000-memory.dmp
memory/4888-34-0x0000000000460000-0x00000000016B4000-memory.dmp
memory/4888-35-0x0000000000460000-0x000000000047E000-memory.dmp
memory/4888-36-0x0000000035580000-0x0000000035B24000-memory.dmp
memory/4888-37-0x0000000035B30000-0x0000000035BCC000-memory.dmp
memory/4888-39-0x0000000035FD0000-0x0000000036062000-memory.dmp
memory/4888-40-0x0000000035D50000-0x0000000035DA0000-memory.dmp
memory/4888-41-0x0000000077B01000-0x0000000077C21000-memory.dmp
memory/4888-42-0x00000000361A0000-0x0000000036362000-memory.dmp
memory/4888-43-0x0000000036420000-0x000000003642A000-memory.dmp