Analysis
- user interaction
yes - max time kernel
56s - max time network
83s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260911-en - resource tags
- submitted
30/10/2026, 11:32
Errors
General
- Target dwe.exe
- Size 48KB
- Sample261030-nnfacaytbv
- SHA256 38d73d1de4016d76d82ed62ba16ee905b05861c006146f65c1274dc0001f2561
Malware Config
Extracted
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neptunerat
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mskopjyivs.localto.net:2997
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filename
USB.exe
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group
MasonGroup
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key
bVFuVmVjIbtJGGDp
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rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 2 IoCs
- Checks computer location settings 2 TTPs 5 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 9 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
- ConfuserEx .NET packer 2 IoCs
Detects ConfuserEx .NET packer.
- 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.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 2 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- Program crash 1 IoCs
- 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.
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- 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 3 IoCs
- Suspicious use of WriteProcessMemory 9 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
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C:\Users\Admin\AppData\Local\Temp\dwe.exe"C:\Users\Admin\AppData\Local\Temp\dwe.exe"1⤵
- Checks computer location settings
- 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
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "dwe" /tr "C:\Users\Admin\AppData\Roaming\dwe.exe"2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Local\Temp\tmp717D.tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp717D.tmp.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\SC2RS.exe"C:\Users\Admin\AppData\Roaming\SC2RS.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\k.exe"C:\Users\Admin\AppData\Roaming\k.exe"4⤵
- Checks computer location settings
- Executes dropped EXE
- Writes to the Master Boot Record (MBR)
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /k reg delete HKCR /f5⤵
- Executes a command shell one-liner
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C:\Windows\system32\reg.exereg delete HKCR /f6⤵
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C:\Users\Admin\AppData\Local\Temp\nasm.exe"nasm.exe" -f bin mbr_temp.asm -o mbr_temp.bin5⤵
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C:\Users\Admin\AppData\Roaming\Virus NahSmi.exe"C:\Users\Admin\AppData\Roaming\Virus NahSmi.exe"4⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\Naيببشمي.exe"C:\Users\Admin\AppData\Roaming\Naيببشمي.exe"5⤵
- Executes dropped EXE
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /k reg delete HKCR /f6⤵
- Executes a command shell one-liner
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C:\Windows\system32\reg.exereg delete HKCR /f7⤵
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C:\Users\Admin\AppData\Roaming\Viurs ByDRX1 ALHB Group.exe"C:\Users\Admin\AppData\Roaming\Viurs ByDRX1 ALHB Group.exe"5⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\Viurs DRX1.exe"C:\Users\Admin\AppData\Local\Temp\Viurs DRX1.exe"6⤵
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C:\Users\Admin\AppData\Roaming\Virus.exe"C:\Users\Admin\AppData\Roaming\Virus.exe"5⤵
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C:\Users\Admin\AppData\Local\Temp\Virus REvi DRX1.exe"C:\Users\Admin\AppData\Local\Temp\Virus REvi DRX1.exe"6⤵
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C:\Users\Admin\AppData\Local\Temp\Virus REvi DRX1.exe"C:\Users\Admin\AppData\Local\Temp\Virus REvi DRX1.exe"7⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 5744 -s 12968⤵
- Program crash
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C:\Users\Admin\AppData\Roaming\Virus SCARS.exe"C:\Users\Admin\AppData\Roaming\Virus SCARS.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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C:\Users\Admin\AppData\Roaming\dwe.exeC:\Users\Admin\AppData\Roaming\dwe.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Roaming\dwe.exe"C:\Users\Admin\AppData\Roaming\dwe.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x38c 0x3941⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5744 -ip 57441⤵
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
dwe.exe.log
Virus REvi DRX1.exe.log
sByte.dll
Virus REvi DRX1.exe
Viurs DRX1.exe
mbr_temp.asm
mbr_temp.bin
nasm.exe
tmp717D.tmp.exe
Naيببشمي.exe
SC2RS.exe
Virus NahSmi.exe
Virus SCARS.exe
Virus.exe
Viurs ByDRX1 ALHB Group.exe
dwe.exe
k.exe
memory/1488-167-0x0000000000790000-0x000000000079A000-memory.dmp
memory/2004-144-0x0000000000FF0000-0x00000000010DC000-memory.dmp
memory/2004-149-0x000000001BDD0000-0x000000001BE72000-memory.dmp
memory/2004-145-0x0000000001860000-0x000000000186C000-memory.dmp
memory/2256-21-0x00000000003E0000-0x00000000009F4000-memory.dmp
memory/2256-22-0x000000001B6E0000-0x000000001BE9C000-memory.dmp
memory/2940-116-0x00000000002E0000-0x00000000002EA000-memory.dmp
memory/2972-87-0x0000000000E20000-0x0000000000F76000-memory.dmp
memory/3008-187-0x0000000000C80000-0x0000000000D22000-memory.dmp
memory/4320-82-0x00000000003A0000-0x00000000006E2000-memory.dmp
memory/4388-4-0x000000001B6E0000-0x000000001B6F0000-memory.dmp
memory/4388-0-0x00000000009D0000-0x00000000009E2000-memory.dmp
memory/4388-1-0x000000001B6E0000-0x000000001B6F0000-memory.dmp
memory/5136-164-0x0000000000400000-0x0000000000539000-memory.dmp
memory/5508-131-0x0000000000410000-0x0000000000456000-memory.dmp
memory/5548-56-0x0000000005110000-0x00000000051A2000-memory.dmp
memory/5548-54-0x0000000000360000-0x000000000066E000-memory.dmp
memory/5548-55-0x00000000056C0000-0x0000000005C66000-memory.dmp
memory/5548-57-0x00000000050C0000-0x00000000050CA000-memory.dmp
memory/5620-48-0x0000000000B40000-0x0000000000FF6000-memory.dmp
memory/5744-196-0x0000000000400000-0x0000000000430000-memory.dmp