Analysis
- max time kernel
148s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
15/10/2026, 16:10
General
- Target DeadClient.exe
- Size 48KB
- Sample261015-tml96as17q
- SHA256 694c077530a1f9eac322b0243827f310021ae55157e7a9347d6481423fb59f16
Malware Config
Extracted
-
neptunerat
-
vrmmy-40798.portmap.host:40798
-
filename
USB.exe
-
group
MasonGroup
-
key
tAMrcwgtkQFPEpld
-
rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 2 IoCs
- Executes dropped EXE 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Enumerates video capture drivers 2 TTPs 1 IoCs
Queries the legacy Video for Windows capture drivers. This is commonly abused by RATs to check for available webcams on the system before reporting to their C2.
- Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\DeadClient.exe"C:\Users\Admin\AppData\Local\Temp\DeadClient.exe"1⤵
- Adds Run key to start application
- Enumerates video capture drivers
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\DeadClient.exeC:\Users\Admin\AppData\Roaming\DeadClient.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
DeadClient.exe
memory/3328-0-0x00007FFDAB46F000-0x00007FFDAB470000-memory.dmp
memory/3328-1-0x0000000000AB0000-0x0000000000AC2000-memory.dmp
memory/3328-2-0x00007FFDAB2E0000-0x00007FFDABC84000-memory.dmp
memory/3328-3-0x00007FFDAB2E0000-0x00007FFDABC84000-memory.dmp
memory/3328-4-0x00007FFDAB2E0000-0x00007FFDABC84000-memory.dmp
memory/3328-6-0x00007FFDAB2E0000-0x00007FFDABC84000-memory.dmp
memory/3328-7-0x00007FFDAB2E0000-0x00007FFDABC84000-memory.dmp