Analysis
- max time kernel
134s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
24/08/2026, 17:32
General
- Target YoudaoDict_fanyiweb_navigation.exe
- Size 4.8MB
- Sample260824-v4benaec94
- SHA256 2f8a4b9af79025520d2b7b498748222b2cf9f5f04a3564a7892c57fa4dd9c358
Malware Config
Signatures
- Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
- Detects DonutLoader 1 IoCs
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 3 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).
- Inno Setup is an open-source installation builder for Windows applications. 2 IoCs
Inno Setup installer
- Suspicious behavior: EnumeratesProcesses 26 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
- Uses Volume Shadow Copy WMI provider
The Volume Shadow Copy service is used to manage backups/snapshots.
- Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
-
C:\Users\Admin\AppData\Local\Temp\YoudaoDict_fanyiweb_navigation.exe"C:\Users\Admin\AppData\Local\Temp\YoudaoDict_fanyiweb_navigation.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-VB1LT981I2.tmp\YoudaoDict_fanyiweb_navigation.tmp"C:\Users\Admin\AppData\Local\Temp\is-VB1LT981I2.tmp\YoudaoDict_fanyiweb_navigation.tmp" /SL5="$401C8,3496914,1359360,C:\Users\Admin\AppData\Local\Temp\YoudaoDict_fanyiweb_navigation.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Programs\DeepLSetup\YiRenZhiXia.exe"C:\Users\Admin\AppData\Local\Programs\DeepLSetup\YiRenZhiXia.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
YiRenZhiXia.exe
emjio.tmp
Bird.dll
_isdecmp.dll
YoudaoDict_fanyiweb_navigation.tmp
fiddledeedee.exe
memory/5084-5-0x0000016131950000-0x0000016131951000-memory.dmp
memory/5084-40-0x00000000002F0000-0x0000000000995000-memory.dmp
memory/6052-1-0x00000000004F0000-0x0000000000652000-memory.dmp
memory/6052-41-0x00000000004F0000-0x0000000000652000-memory.dmp
memory/6112-46-0x0000000002910000-0x00000000029F4000-memory.dmp