Analysis
- max time kernel
150s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260710-en - resource tags
- submitted
05/08/2026, 12:29
General
- Target btweb_installer.exe
- Size 2.1MB
- Sample260805-ppdctafq8v
- SHA256 f4a3f031d38ed26161abab40b902215ae2cb7f6bd9ef9df5b7f2fbfbaea3dac8
Malware Config
Signatures
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 10 IoCs
- Checks for any installed AV software in registry 1 TTPs 9 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 3 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
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies registry class 39 IoCs
- Script User-Agent 3 IoCs
Uses user-agent string associated with script host/environment.
- Suspicious behavior: EnumeratesProcesses 14 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\btweb_installer.exe"C:\Users\Admin\AppData\Local\Temp\btweb_installer.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-7SHAS5HK25.tmp\btweb_installer.tmp"C:\Users\Admin\AppData\Local\Temp\is-7SHAS5HK25.tmp\btweb_installer.tmp" /SL5="$A0078,930956,905728,C:\Users\Admin\AppData\Local\Temp\btweb_installer.exe"2⤵
- Executes dropped EXE
- Checks for any installed AV software in registry
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-5RLUSI1UGX.tmp\btweb_install_rr.exe"C:\Users\Admin\AppData\Local\Temp\is-5RLUSI1UGX.tmp\btweb_install_rr.exe" /S3⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
-
-
-
C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k GPSvcGroup1⤵
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
106.png
107.png
108.png
btweb_install_rr.exe
btweb_installer.tmp
FindProcDLL.dll
INetC.dll
System.dll
UAC.dll
nsisFirewall.dll
btweb.exe
memory/4544-8-0x0000000000160000-0x000000000024C000-memory.dmp
memory/4544-1-0x0000000000160000-0x000000000024C000-memory.dmp
memory/4820-28-0x0000000007D30000-0x0000000007E70000-memory.dmp
memory/4820-27-0x0000000007D30000-0x0000000007E70000-memory.dmp
memory/4820-35-0x0000000007D30000-0x0000000007E70000-memory.dmp
memory/4820-40-0x0000000007D30000-0x0000000007E70000-memory.dmp
memory/4820-41-0x0000000007D30000-0x0000000007E70000-memory.dmp
memory/4820-44-0x0000000007D30000-0x0000000007E70000-memory.dmp
memory/4820-43-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-55-0x0000000007D30000-0x0000000007E70000-memory.dmp
memory/4820-34-0x0000000007D30000-0x0000000007E70000-memory.dmp
memory/4820-61-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-30-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-36-0x0000000007D30000-0x0000000007E70000-memory.dmp
memory/4820-21-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-9-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-10-0x0000000001520000-0x0000000001521000-memory.dmp
memory/4820-6-0x0000000001520000-0x0000000001521000-memory.dmp
memory/4820-128-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-130-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-132-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-134-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-136-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-138-0x00000000006A0000-0x0000000000AE6000-memory.dmp
memory/4820-153-0x00000000006A0000-0x0000000000AE6000-memory.dmp