Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
18/05/2024, 02:42
General
- Target WinNc.exe
- Size 21.3MB
- Sample240518-c7b69age69
- SHA256 34a31ce56c97fdc7a5db20c1dec741830c75d97b87c11c1658754419213ff6d7
Malware Config
Extracted
-
stealc
Signatures
- Detect Vidar Stealer 4 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 3 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates connected drives 3 TTPs 46 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 9 IoCs
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of FindShellTrayWindow 2 IoCs
- Suspicious use of SetWindowsHookEx 6 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\WinNc.exe"C:\Users\Admin\AppData\Local\Temp\WinNc.exe"1⤵
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\Plugin\WinNc.exeC:\Users\Admin\AppData\Roaming\Plugin\WinNc.exe2⤵
- Executes dropped EXE
- Loads dropped DLL
- Enumerates connected drives
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\netsh.exeC:\Windows\SysWOW64\netsh.exe3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\updater.exeC:\Users\Admin\AppData\Local\Temp\updater.exe4⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\HDBKFHIJKJKE" & exit5⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 106⤵
- Delays execution with timeout.exe
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
d4d99d46
updater.exe
7z.dll
Drive_.ico
Lang_de.ini
Lang_es.ini
Lang_fa.ini
Lang_fr.ini
Lang_it.ini
Lang_ko.ini
Lang_nl.ini
Lang_ru.ini
Lang_sv.ini
Lang_tr.ini
Lang_uk.ini
Lang_zh.ini
State_.ico
UNRAR64.DLL
WinNc.exe
WinNcIconsFlat.icl
lang_cz.ini
lang_en.ini
lang_hu.ini
lang_pl.ini
rhinestone.m4a
rotor.dat
memory/2916-0-0x0000000003C70000-0x0000000003C71000-memory.dmp
memory/2916-44-0x0000000000400000-0x0000000001BD3000-memory.dmp
memory/2916-1-0x00007FF933480000-0x00007FF9335F2000-memory.dmp
memory/3460-71-0x0000000000400000-0x0000000001BD3000-memory.dmp
memory/3956-79-0x00007FF951770000-0x00007FF951965000-memory.dmp
memory/3956-95-0x0000000000B10000-0x0000000000D57000-memory.dmp
memory/3956-97-0x0000000019990000-0x0000000019BEF000-memory.dmp
memory/3956-135-0x0000000000B10000-0x0000000000D57000-memory.dmp
memory/3956-136-0x0000000000B10000-0x0000000000D57000-memory.dmp
memory/3956-138-0x0000000000B10000-0x0000000000D57000-memory.dmp
memory/4412-73-0x00007FF951770000-0x00007FF951965000-memory.dmp