Analysis
- max time kernel
148s - max time network
143s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
25/09/2026, 16:11
General
- Target VARQOO-RDP-Guard-Setup-1.1.1.exe
- Size 2.2MB
- Sample260925-tmw5csvye1
- SHA256 0b749e8cecc2af7322eac65aaf6aa76b0731f6e845e8a04af5585b90341481cf
Malware Config
Signatures
- Creates new service(s) 2 TTPs
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 4 IoCs
- Stops running service(s) 4 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Drops file in Program Files directory 13 IoCs
- Launches sc.exe 7 IoCs
Sc.exe is a Windows utlilty to control services on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 1 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- Reads the TCP/IP host and domain name from the registry 1 TTPs 4 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 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Inno Setup is an open-source installation builder for Windows applications. 3 IoCs
Inno Setup installer
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\VARQOO-RDP-Guard-Setup-1.1.1.exe"C:\Users\Admin\AppData\Local\Temp\VARQOO-RDP-Guard-Setup-1.1.1.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-S7JJ2TJO9C.tmp\VARQOO-RDP-Guard-Setup-1.1.1.tmp"C:\Users\Admin\AppData\Local\Temp\is-S7JJ2TJO9C.tmp\VARQOO-RDP-Guard-Setup-1.1.1.tmp" /SL5="$60246,1076672,960512,C:\Users\Admin\AppData\Local\Temp\VARQOO-RDP-Guard-Setup-1.1.1.exe"2⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\sc.exe"C:\Windows\system32\sc.exe" stop VARQOORdpGuard3⤵
- Launches sc.exe
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /C ""C:\Program Files\VARQOO\RDP Guard\install_service.bat" /silent"3⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\fltMC.exefltmc4⤵
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C:\Windows\System32\sc.exesc.exe query "VARQOORdpGuard"4⤵
- Launches sc.exe
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C:\Windows\System32\sc.exesc.exe create "VARQOORdpGuard" binPath= "\"C:\Program Files\VARQOO\RDP Guard\VARQOO.RdpGuard.Service.exe\"" start= auto DisplayName= "VARQOO RDP Guard"4⤵
- Launches sc.exe
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C:\Windows\System32\sc.exesc.exe description "VARQOORdpGuard" "RDP brute-force and country access protection by VARQOO"4⤵
- Launches sc.exe
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C:\Windows\System32\sc.exesc.exe failure "VARQOORdpGuard" reset= 86400 actions= restart/5000/restart/15000/restart/300004⤵
- Launches sc.exe
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C:\Windows\System32\sc.exesc.exe failureflag "VARQOORdpGuard" 14⤵
- Launches sc.exe
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C:\Windows\System32\sc.exesc.exe start "VARQOORdpGuard"4⤵
- Launches sc.exe
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C:\Program Files\VARQOO\RDP Guard\VARQOO.RdpGuard.Manager.exe"C:\Program Files\VARQOO\RDP Guard\VARQOO.RdpGuard.Manager.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
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C:\Program Files\VARQOO\RDP Guard\VARQOO.RdpGuard.Service.exe"C:\Program Files\VARQOO\RDP Guard\VARQOO.RdpGuard.Service.exe"1⤵
- Executes dropped EXE
- Loads dropped DLL
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1System Services
2Service Execution
2Replay Monitor
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Downloads
VARQOO.RdpGuard.Core.dll
VARQOO.RdpGuard.Manager.exe
VARQOO.RdpGuard.Service.exe
install_service.bat
config.json
VARQOO-RDP-Guard-Setup-1.1.1.tmp
memory/2104-8-0x0000000000150000-0x0000000000249000-memory.dmp
memory/2104-73-0x0000000000150000-0x0000000000249000-memory.dmp
memory/2104-0-0x0000000000150000-0x0000000000249000-memory.dmp
memory/4468-69-0x00000000067C0000-0x00000000067C8000-memory.dmp
memory/4468-72-0x00000000067E0000-0x00000000067EE000-memory.dmp
memory/4468-71-0x0000000006810000-0x000000000684E000-memory.dmp
memory/4468-65-0x0000000000B10000-0x0000000000B66000-memory.dmp
memory/4596-57-0x0000000004B70000-0x0000000004B89000-memory.dmp
memory/4596-56-0x0000000004B40000-0x0000000004B5E000-memory.dmp
memory/4596-48-0x0000000004060000-0x0000000004222000-memory.dmp
memory/4596-50-0x0000000004BE0000-0x000000000510C000-memory.dmp
memory/4596-53-0x0000000004700000-0x0000000004750000-memory.dmp
memory/4596-54-0x00000000047C0000-0x0000000004826000-memory.dmp
memory/4596-55-0x0000000004AC0000-0x0000000004B36000-memory.dmp
memory/4596-47-0x0000000003E70000-0x0000000003E8C000-memory.dmp
memory/4596-43-0x0000000003E40000-0x0000000003E62000-memory.dmp
memory/4596-42-0x0000000000700000-0x0000000000728000-memory.dmp
memory/4952-14-0x0000000000B10000-0x0000000000F64000-memory.dmp
memory/4952-12-0x0000000000B10000-0x0000000000F64000-memory.dmp
memory/4952-70-0x0000000000B10000-0x0000000000F64000-memory.dmp
memory/4952-9-0x0000000000B10000-0x0000000000F64000-memory.dmp
memory/4952-10-0x0000000000FE0000-0x0000000000FE1000-memory.dmp
memory/4952-6-0x0000000000FE0000-0x0000000000FE1000-memory.dmp