Analysis
- max time kernel
150s - max time network
150s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
07/11/2026, 14:16
General
- Target cc.exe
- Size 176KB
- Sample261107-rlccfsdw9k
- SHA256 bee5547c83f7b5a7d23d5b867bff996197ff151b6319093de8248162fb0f00a1
Malware Config
Extracted
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neptunerat
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filename
USB.exe
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group
<Neptune>
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key
DcSyJiFlD5Fs5L5D
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localhost
127.0.0.1:1417
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rat_name
<123456789>
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Family: Xworm
Xworm is a remote access trojan written in C#.
- Detect Xworm Payload 2 IoCs
- Detects NeptuneRAT stealer 2 IoCs
- Modifies visibility of hidden/system files in Explorer 2 TTPs 2 IoCs
- Executes dropped EXE 6 IoCs
- Adds Run key to start application 2 TTPs 4 IoCs
- Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Drops file in System32 directory 2 IoCs
- Drops file in Windows directory 5 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 6 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 12 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\cc.exe"C:\Users\Admin\AppData\Local\Temp\cc.exe"1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\users\admin\appdata\local\temp\cc.exec:\users\admin\appdata\local\temp\cc.exe2⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\Resources\Themes\icsys.icn.exeC:\Windows\Resources\Themes\icsys.icn.exe2⤵
- Executes dropped EXE
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\resources\themes\explorer.exec:\windows\resources\themes\explorer.exe3⤵
- Modifies visibility of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\resources\spoolsv.exec:\windows\resources\spoolsv.exe SE4⤵
- Executes dropped EXE
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\resources\svchost.exec:\windows\resources\svchost.exe5⤵
- Modifies visibility of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
\??\c:\windows\resources\spoolsv.exec:\windows\resources\spoolsv.exe PR6⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v16
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Hide Artifacts
1Hidden Files and Directories
1Modify Registry
2Replay Monitor
Loading Replay Monitor...
Downloads
cc.exe
explorer.exe
icsys.icn.exe
spoolsv.exe
svchost.exe
memory/820-22-0x0000000000400000-0x000000000041F000-memory.dmp
memory/820-58-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1716-64-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1716-47-0x0000000000400000-0x000000000041F000-memory.dmp
memory/2320-57-0x0000000000400000-0x000000000041F000-memory.dmp
memory/4368-63-0x0000000000400000-0x000000000041F000-memory.dmp
memory/4944-56-0x0000000000400000-0x000000000041F000-memory.dmp
memory/4944-54-0x0000000000400000-0x000000000041F000-memory.dmp
memory/5000-11-0x00007FFD660AF000-0x00007FFD660B0000-memory.dmp
memory/5000-13-0x00007FFD65F20000-0x00007FFD668C4000-memory.dmp
memory/5000-60-0x00007FFD65F20000-0x00007FFD668C4000-memory.dmp
memory/5000-61-0x00007FFD65F20000-0x00007FFD668C4000-memory.dmp
memory/5000-62-0x00007FFD65F20000-0x00007FFD668C4000-memory.dmp
memory/5000-12-0x0000000000F40000-0x0000000000F50000-memory.dmp
memory/5000-21-0x00007FFD65F20000-0x00007FFD668C4000-memory.dmp
memory/5580-0-0x0000000000400000-0x000000000041F000-memory.dmp
memory/5580-59-0x0000000000400000-0x000000000041F000-memory.dmp