Analysis
- max time kernel
143s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
10/07/2023, 13:45
General
- Target Factura 0104109174pdf.exe
- Size 365KB
- Sample230710-q2dpsabg9y
- SHA256 38b1fa09afda5be40267c84dc88ed1291301a6f031b2de0185d40dd9372b2c45
Malware Config
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Drops file in System32 directory 2 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Windows directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 2 IoCs
- Suspicious behavior: EnumeratesProcesses 22 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\Factura 0104109174pdf.exe"C:\Users\Admin\AppData\Local\Temp\Factura 0104109174pdf.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Factura 0104109174pdf.exe"C:\Users\Admin\AppData\Local\Temp\Factura 0104109174pdf.exe"2⤵
- Checks QEMU agent file
- Checks computer location settings
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
System.dll
memory/4456-142-0x0000000003220000-0x0000000006432000-memory.dmp
memory/4456-143-0x0000000003220000-0x0000000006432000-memory.dmp
memory/4608-144-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4608-145-0x0000000001660000-0x0000000004872000-memory.dmp
memory/4608-146-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4608-158-0x0000000001660000-0x0000000004872000-memory.dmp
memory/4608-162-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4608-163-0x0000000001660000-0x0000000004872000-memory.dmp
memory/4608-164-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4608-166-0x0000000034E90000-0x00000000351DA000-memory.dmp