Analysis
- max time kernel
143s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
04/08/2023, 04:47
General
- Target Solicitud de Cotización (Universidad Autónoma de Centroamérica costa Rica)·pdf.exe
- Size 1.5MB
- Sample230804-fej8yahe99
- SHA256 f8de8a1c7444291f99f4ee2f1e2fe81ca27d2b1b195705a7dba0219b66961db6
Score
10/10
Malware Config
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Checks QEMU agent file 2 TTPs 1 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
- Loads dropped DLL 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Solicitud de Cotización (Universidad Autónoma de Centroamérica costa Rica)·pdf.exe"C:\Users\Admin\AppData\Local\Temp\Solicitud de Cotización (Universidad Autónoma de Centroamérica costa Rica)·pdf.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2996 -s 11082⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2996 -ip 29961⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
System.dll
memory/2996-143-0x0000000004DD0000-0x0000000006793000-memory.dmp
memory/2996-144-0x0000000004DD0000-0x0000000006793000-memory.dmp
memory/2996-145-0x0000000077011000-0x0000000077131000-memory.dmp
memory/2996-146-0x0000000004DD0000-0x0000000006793000-memory.dmp