Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
30/10/2024, 00:07
General
- Target rTransferenciarealizada451236.exe
- Size 893KB
- Sample241030-aeqststner
- SHA256 8085c17ea9441ff19ee1d021408ce2b159bdf4d53704a9afd180e76033c74415
Malware Config
Signatures
- Guloader family
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Loads dropped DLL 2 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Program Files directory 1 IoCs
- Drops file in Windows directory 6 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- 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 2 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe"C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe"C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe"2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3984 -s 10483⤵
- Program crash
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3984 -ip 39841⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
System.dll
memory/1580-18-0x00000000031C0000-0x00000000052C3000-memory.dmp
memory/1580-19-0x00000000031C0000-0x00000000052C3000-memory.dmp
memory/1580-20-0x0000000076E61000-0x0000000076F81000-memory.dmp
memory/1580-21-0x0000000010004000-0x0000000010005000-memory.dmp
memory/1580-22-0x00000000031C0000-0x00000000052C3000-memory.dmp
memory/3984-23-0x0000000000400000-0x0000000001654000-memory.dmp
memory/3984-24-0x0000000001660000-0x0000000003763000-memory.dmp
memory/3984-37-0x0000000000400000-0x0000000001654000-memory.dmp
memory/3984-38-0x0000000000400000-0x0000000001654000-memory.dmp
memory/3984-39-0x0000000001660000-0x0000000003763000-memory.dmp
memory/3984-40-0x0000000076E61000-0x0000000076F81000-memory.dmp
memory/3984-41-0x0000000000400000-0x0000000001654000-memory.dmp