Analysis
- max time kernel
898s - max time network
903s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260513-en - resource tags
- submitted
31/07/2026, 04:09
General
- Target kiz on top.exe
- Size 84KB
- Sample260731-eq4laateke
- SHA256 013e3322004efcef969ef02f74b9cb6a36feef10b441dc01c4218010d42f2927
Malware Config
Extracted
-
neptunerat
-
12.tcp.vip.cpolar.cn:10341
-
filename
MasonUSB.exe
-
group
MasonGroup
-
key
4lYGRx5jA2ybZWwr
-
rat_name
MasonRAT
Signatures
- Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects DonutLoader 2 IoCs
- Detects NeptuneRAT stealer 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 1 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\kiz on top.exe"C:\Users\Admin\AppData\Local\Temp\kiz on top.exe"1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "kiz on top" /tr "C:\Users\Admin\AppData\Roaming\kiz on top.exe"2⤵
- Scheduled Task/Job: Scheduled Task
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
memory/4808-1-0x0000000000BC0000-0x0000000000BD4000-memory.dmp
memory/4808-0-0x0000000000410000-0x000000000042C000-memory.dmp
memory/4808-3-0x000000001B2A0000-0x000000001B2B0000-memory.dmp
memory/4808-4-0x0000000000C10000-0x0000000000C22000-memory.dmp
memory/4808-5-0x000000001B2A0000-0x000000001B2B0000-memory.dmp
memory/4808-6-0x000000001B2A0000-0x000000001B2B0000-memory.dmp
memory/4808-8-0x000000001B2A0000-0x000000001B2B0000-memory.dmp
memory/4808-7-0x000000001B2A0000-0x000000001B2B0000-memory.dmp