Analysis
- user interaction
yes - max time kernel
50s - max time network
51s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
06/05/2026, 03:58
General
- Target pengu-loader-v1.1.6-setup.exe
- Size 2.5MB
- Sample260506-ejkvlaes8r
- SHA256 dfc9a2b78ad5ad356c82693bc0c53eb9279d171ab8239a089831d1d95bd80e82
Malware Config
Signatures
- Event Triggered Execution: Image File Execution Options Injection 1 TTPs 2 IoCs
- Executes dropped EXE 2 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 19 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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
- Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Modifies Control Panel 1 IoCs
- Modifies registry class 1 IoCs
- Suspicious behavior: EnumeratesProcesses 13 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of FindShellTrayWindow 36 IoCs
- Suspicious use of SendNotifyMessage 35 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\pengu-loader-v1.1.6-setup.exe"C:\Users\Admin\AppData\Local\Temp\pengu-loader-v1.1.6-setup.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-BAS9G.tmp\pengu-loader-v1.1.6-setup.tmp"C:\Users\Admin\AppData\Local\Temp\is-BAS9G.tmp\pengu-loader-v1.1.6-setup.tmp" /SL5="$7023E,1543456,869888,C:\Users\Admin\AppData\Local\Temp\pengu-loader-v1.1.6-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
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C:\Program Files\Pengu Loader\Pengu Loader.exe"C:\Program Files\Pengu Loader\Pengu Loader.exe"3⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Modifies Control Panel
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\cmd.exe"cmd.exe" /C reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\LeagueClientUx.exe" /v "Debugger" /t REG_SZ /d "rundll32 \"C:\Program Files\Pengu Loader\core.dll\", #6000 " /f4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\reg.exereg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\LeagueClientUx.exe" /v "Debugger" /t REG_SZ /d "rundll32 \"C:\Program Files\Pengu Loader\core.dll\", #6000 " /f5⤵
- Event Triggered Execution: Image File Execution Options Injection
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc1⤵
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /01⤵
- Checks SCSI registry key(s)
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
ModernWpf.Controls.dll
ModernWpf.dll
Ookii.Dialogs.Wpf.dll
Pengu Loader.exe
core.dll
pengu-loader-v1.1.6-setup.tmp
memory/3368-65-0x000001539B380000-0x000001539B381000-memory.dmp
memory/3368-64-0x000001539B380000-0x000001539B381000-memory.dmp
memory/3368-73-0x000001539B380000-0x000001539B381000-memory.dmp
memory/3368-70-0x000001539B380000-0x000001539B381000-memory.dmp
memory/3368-66-0x000001539B380000-0x000001539B381000-memory.dmp
memory/3368-74-0x000001539B380000-0x000001539B381000-memory.dmp
memory/3368-72-0x000001539B380000-0x000001539B381000-memory.dmp
memory/3368-71-0x000001539B380000-0x000001539B381000-memory.dmp
memory/3368-75-0x000001539B380000-0x000001539B381000-memory.dmp
memory/3368-76-0x000001539B380000-0x000001539B381000-memory.dmp
memory/3468-39-0x0000000001830000-0x0000000001942000-memory.dmp
memory/3468-38-0x0000000000D40000-0x0000000000E22000-memory.dmp
memory/3468-0-0x0000000000D40000-0x0000000000E22000-memory.dmp
memory/3468-55-0x0000000000D40000-0x0000000000E22000-memory.dmp
memory/3468-56-0x0000000001830000-0x0000000001942000-memory.dmp
memory/4340-40-0x0000000000410000-0x0000000000752000-memory.dmp
memory/4340-41-0x0000000002BB0000-0x0000000002BB1000-memory.dmp
memory/4340-5-0x0000000002BB0000-0x0000000002BB1000-memory.dmp
memory/4340-54-0x0000000000410000-0x0000000000752000-memory.dmp
memory/5568-53-0x000001F661B40000-0x000001F661BF4000-memory.dmp
memory/5568-59-0x000001F664740000-0x000001F66474A000-memory.dmp
memory/5568-58-0x000001F664750000-0x000001F664770000-memory.dmp
memory/5568-60-0x000001F6612D0000-0x000001F6612E0000-memory.dmp
memory/5568-62-0x000001F647200000-0x000001F64720C000-memory.dmp
memory/5568-63-0x000001F664B00000-0x000001F664B12000-memory.dmp
memory/5568-51-0x000001F661410000-0x000001F66141E000-memory.dmp
memory/5568-50-0x000001F661800000-0x000001F661838000-memory.dmp
memory/5568-49-0x000001F661400000-0x000001F661408000-memory.dmp
memory/5568-48-0x000001F6618C0000-0x000001F66197A000-memory.dmp
memory/5568-45-0x000001F6472B0000-0x000001F6472D6000-memory.dmp
memory/5568-46-0x000001F647260000-0x000001F647268000-memory.dmp
memory/5568-47-0x000001F647270000-0x000001F64727A000-memory.dmp
memory/5568-44-0x000001F661520000-0x000001F661608000-memory.dmp
memory/5568-42-0x000001F6612D0000-0x000001F6612E0000-memory.dmp
memory/5568-37-0x000001F646BA0000-0x000001F646DF6000-memory.dmp