Analysis
- max time kernel
148s - max time network
161s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
25/08/2026, 00:08
General
- Target _Silent Install.cmd
- Size 1KB
- Sample260825-ae7rcavfld
- SHA256 247c212eaf760f94582ff1c0454c20ba5ac3f9eb624300e45c1b3ab2a892914f
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 4 IoCs
- 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 6 IoCs
- 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.
- System Location Discovery: System Language Discovery 1 TTPs 2 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. 2 IoCs
Inno Setup installer
- Runs .reg file with regedit 1 IoCs
- Suspicious behavior: EnumeratesProcesses 62 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SetWindowsHookEx 3 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\_Silent Install.cmd"1⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\OCCT 17.0.17.exe"OCCT 17.0.17.exe" /SILENT2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-PNL4H.tmp\OCCT 17.0.17.tmp"C:\Users\Admin\AppData\Local\Temp\is-PNL4H.tmp\OCCT 17.0.17.tmp" /SL5="$602C8,211687484,64512,C:\Users\Admin\AppData\Local\Temp\OCCT 17.0.17.exe" /SILENT3⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\regedit.exe"C:\Windows\regedit.exe" /S "C:\Users\Admin\AppData\Local\Temp\settings.reg"4⤵
- Runs .reg file with regedit
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
ISTask.dll
VclStylesInno.dll
OCCT 17.0.17.tmp
memory/3688-0-0x0000000000400000-0x0000000000417000-memory.dmp
memory/3688-105-0x0000000000400000-0x0000000000417000-memory.dmp
memory/5084-5-0x00000000006F0000-0x00000000006F1000-memory.dmp
memory/5084-16-0x00000000072A0000-0x00000000072B6000-memory.dmp
memory/5084-22-0x00000000074D0000-0x00000000077EA000-memory.dmp
memory/5084-26-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-25-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-24-0x0000000007940000-0x0000000007941000-memory.dmp
memory/5084-29-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-28-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-35-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-38-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-45-0x00000000079B0000-0x00000000079B1000-memory.dmp
memory/5084-53-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-52-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-51-0x00000000079D0000-0x00000000079D1000-memory.dmp
memory/5084-50-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-49-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-48-0x00000000079C0000-0x00000000079C1000-memory.dmp
memory/5084-47-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-46-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-44-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-43-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-42-0x00000000079A0000-0x00000000079A1000-memory.dmp
memory/5084-41-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-40-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-39-0x0000000007990000-0x0000000007991000-memory.dmp
memory/5084-37-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-36-0x0000000007980000-0x0000000007981000-memory.dmp
memory/5084-34-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-33-0x0000000007970000-0x0000000007971000-memory.dmp
memory/5084-31-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-30-0x0000000007960000-0x0000000007961000-memory.dmp
memory/5084-32-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-27-0x0000000007950000-0x0000000007951000-memory.dmp
memory/5084-60-0x0000000007A00000-0x0000000007A01000-memory.dmp
memory/5084-76-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-86-0x000000000766E000-0x000000000766F000-memory.dmp
memory/5084-83-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-82-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-81-0x0000000007A70000-0x0000000007A71000-memory.dmp
memory/5084-80-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-79-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-78-0x0000000007A60000-0x0000000007A61000-memory.dmp
memory/5084-77-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-75-0x0000000007A50000-0x0000000007A51000-memory.dmp
memory/5084-74-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-73-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-72-0x0000000007A40000-0x0000000007A41000-memory.dmp
memory/5084-71-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-70-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-69-0x0000000007A30000-0x0000000007A31000-memory.dmp
memory/5084-68-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-67-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-66-0x0000000007A20000-0x0000000007A21000-memory.dmp
memory/5084-65-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-64-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-63-0x0000000007A10000-0x0000000007A11000-memory.dmp
memory/5084-62-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-61-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-59-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-58-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-57-0x00000000079F0000-0x00000000079F1000-memory.dmp
memory/5084-56-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-55-0x00000000077F0000-0x0000000007930000-memory.dmp
memory/5084-54-0x00000000079E0000-0x00000000079E1000-memory.dmp
memory/5084-87-0x00000000074D0000-0x00000000077EA000-memory.dmp
memory/5084-88-0x00000000074D0000-0x00000000077EA000-memory.dmp
memory/5084-89-0x00000000074D0000-0x00000000077EA000-memory.dmp
memory/5084-90-0x00000000074D0000-0x00000000077EA000-memory.dmp
memory/5084-91-0x00000000074D0000-0x00000000077EA000-memory.dmp
memory/5084-92-0x00000000074D0000-0x00000000077EA000-memory.dmp
memory/5084-93-0x00000000074D0000-0x00000000077EA000-memory.dmp
memory/5084-103-0x00000000006F0000-0x00000000006F1000-memory.dmp
memory/5084-104-0x00000000074D0000-0x00000000077EA000-memory.dmp