Analysis
- max time kernel
149s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
09/08/2026, 18:14
General
- Target Serv-U FTPServer_v6.3.0.1.exe
- Size 2.4MB
- Sample260809-wvrkystbmf
- SHA256 c52fc1b11915c55deeb733db5324b7bfde83eb8fa00af592043b12ac67ea965b
Malware Config
Signatures
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 8 IoCs
- Loads dropped DLL 14 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 9 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious use of SetWindowsHookEx 6 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Serv-U FTPServer_v6.3.0.1.exe"C:\Users\Admin\AppData\Local\Temp\Serv-U FTPServer_v6.3.0.1.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-JF4M5.tmp\is-NLUL1.tmp"C:\Users\Admin\AppData\Local\Temp\is-JF4M5.tmp\is-NLUL1.tmp" /SL4 $590230 "C:\Users\Admin\AppData\Local\Temp\Serv-U FTPServer_v6.3.0.1.exe" 2282436 711682⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\SetupUtil.exe"C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\SetupUtil.exe" -checkfirewall -ini:"C:\Program Files (x86)\RhinoSoft.com\Serv-U"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
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C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\SetupUtil.exe"C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\SetupUtil.exe" -checkreggie -ini:"C:\Program Files (x86)\RhinoSoft.com\Serv-U"3⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\ServUDaemon.exe"C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\ServUDaemon.exe" /k "c:\program files (x86)\rhinosoft.com\serv-u\ServUDaemon.ini"4⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
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C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\SetupUtil.exe"C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\SetupUtil.exe" -shutdown3⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\ServUAdmin.exe"C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\ServUAdmin.exe" /s4⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\ServUDaemon.exe"C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\ServUDaemon.exe" /s4⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
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C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\ServUTray.exe"C:\Users\Admin\AppData\Local\Temp\is-7PTJB.tmp\ServUTray.exe" /s4⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
RhinoNET.dll
ServUAdmin.exe
ServUDaemon.exe
ServUTray.exe
SetupUtil.exe
msvcp71.dll
msvcr71.dll
zlib1.dll
is-NLUL1.tmp
memory/1112-1-0x0000000000400000-0x0000000000418000-memory.dmp
memory/1112-64-0x0000000000400000-0x0000000000418000-memory.dmp
memory/1112-0-0x000000000040C000-0x000000000040D000-memory.dmp
memory/2980-63-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-71-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-91-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-89-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-11-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-7-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-65-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-67-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-69-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-87-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-73-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-75-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-77-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-79-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-81-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-83-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2980-85-0x0000000000400000-0x00000000004B5000-memory.dmp
memory/2988-59-0x0000000000500000-0x0000000000519000-memory.dmp
memory/3708-48-0x0000000000A80000-0x0000000000A93000-memory.dmp
memory/4536-52-0x0000000000400000-0x000000000068B000-memory.dmp