Analysis
- max time kernel
93s - max time network
136s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
14/11/2024, 06:35
General
- Target d33bf5ccd141c26d9e218fb573b078cdcd54eb890d2a32306a0eea649750aad8.exe
- Size 2.1MB
- Sample241114-hchy7svlay
- SHA256 d33bf5ccd141c26d9e218fb573b078cdcd54eb890d2a32306a0eea649750aad8
Malware Config
Extracted
-
stealc
-
tale
-
http://185.215.113.206
-
url_path
/6c4adf523b719729.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Stealc family
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Identifies Wine through registry keys 2 TTPs 1 IoCs
Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.
- Loads dropped DLL 1 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- 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.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\d33bf5ccd141c26d9e218fb573b078cdcd54eb890d2a32306a0eea649750aad8.exe"C:\Users\Admin\AppData\Local\Temp\d33bf5ccd141c26d9e218fb573b078cdcd54eb890d2a32306a0eea649750aad8.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Identifies Wine through registry keys
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\d33bf5ccd141c26d9e218fb573b078cdcd54eb890d2a32306a0eea649750aad8.exe" & del "C:\ProgramData\*.dll"" & exit2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
chrome.dll
memory/3640-0-0x0000000000D20000-0x000000000145D000-memory.dmp
memory/3640-1-0x0000000077194000-0x0000000077196000-memory.dmp
memory/3640-2-0x0000000000D21000-0x0000000000D89000-memory.dmp
memory/3640-3-0x0000000000D20000-0x000000000145D000-memory.dmp
memory/3640-9-0x0000000000D20000-0x000000000145D000-memory.dmp
memory/3640-11-0x0000000000D20000-0x000000000145D000-memory.dmp