Analysis
- max time kernel
148s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20231222-en - resource tags
- submitted
07/01/2024, 19:34
General
- Target 493610666610bb568fb1fb2a29dfc86a.exe
- Size 531KB
- Sample240107-yahhnacfel
- SHA256 98c830e1f593c1eae961b44822ac2990df90e214aad17cc9c3caf19b09005f7e
Score
10/10
Malware Config
Signatures
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- UPX packed file 7 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Drops file in System32 directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\493610666610bb568fb1fb2a29dfc86a.exe"C:\Users\Admin\AppData\Local\Temp\493610666610bb568fb1fb2a29dfc86a.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\riodrv.exe"C:\Windows\system32\riodrv.exe"2⤵
- Executes dropped EXE
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
riodrv.exe
riodrv.exe
riodrv.exe
memory/3916-12-0x0000000000400000-0x0000000000486000-memory.dmp
memory/3916-13-0x0000000000740000-0x0000000000741000-memory.dmp
memory/3916-14-0x0000000000400000-0x0000000000486000-memory.dmp
memory/4064-0-0x0000000000400000-0x0000000000486000-memory.dmp
memory/4064-1-0x0000000000A80000-0x0000000000A81000-memory.dmp
memory/4064-11-0x0000000000400000-0x0000000000486000-memory.dmp