Analysis
- max time kernel
148s - max time network
125s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
02/11/2026, 16:51
General
- Target PromptOS-Setup.exe
- Size 10.1MB
- Sample261102-vct3pavxex
- SHA256 08fa634e8dcd170314aacaebdeb80544ebb72a4ab8aea0209e8b381ba43ae88e
Malware Config
Signatures
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 7 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 24 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 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. 3 IoCs
Inno Setup installer
- Modifies registry class 7 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\PromptOS-Setup.exe"C:\Users\Admin\AppData\Local\Temp\PromptOS-Setup.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-94ANV.tmp\PromptOS-Setup.tmp"C:\Users\Admin\AppData\Local\Temp\is-94ANV.tmp\PromptOS-Setup.tmp" /SL5="$40110,9583471,867840,C:\Users\Admin\AppData\Local\Temp\PromptOS-Setup.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
-
C:\Program Files (x86)\PromptOS\prompt_manager.exe"C:\Program Files (x86)\PromptOS\prompt_manager.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Reads the TCP/IP host and domain name from the registry
- Modifies registry class
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
app_links_plugin.dll
app.so
AssetManifest.bin
FontManifest.json
NativeAssetsManifest.json
MaterialIcons-Regular.otf
icudtl.dat
flutter_windows.dll
prompt_manager.exe
share_plus_plugin.dll
url_launcher_windows_plugin.dll
PromptOS-Setup.tmp
memory/1172-91-0x0000022DB0CE0000-0x0000022DB134D000-memory.dmp
memory/1172-89-0x0000022DB05E0000-0x0000022DB05E1000-memory.dmp
memory/1172-93-0x0000022DB05F0000-0x0000022DB05F1000-memory.dmp
memory/1172-92-0x0000022DB0CE0000-0x0000022DB134D000-memory.dmp
memory/1172-90-0x0000022DB0CE0000-0x0000022DB134D000-memory.dmp
memory/2180-12-0x00000000008C0000-0x0000000000C37000-memory.dmp
memory/2180-87-0x00000000008C0000-0x0000000000C37000-memory.dmp
memory/2180-85-0x00000000008C0000-0x0000000000C37000-memory.dmp
memory/2180-10-0x0000000003120000-0x0000000003121000-memory.dmp
memory/2180-9-0x00000000008C0000-0x0000000000C37000-memory.dmp
memory/2180-6-0x0000000003120000-0x0000000003121000-memory.dmp
memory/4680-95-0x0000000000E80000-0x0000000000F64000-memory.dmp
memory/4680-0-0x0000000000E80000-0x0000000000F64000-memory.dmp
memory/4680-8-0x0000000000E80000-0x0000000000F64000-memory.dmp