Analysis
- max time kernel
146s - max time network
153s - platform
windows11-21h2_x64 - resource
win11-20240611-en - resource tags
- submitted
22/06/2024, 00:58
General
- Target c4c0310bc779bb4ba051be5fe124c783a101e9d0ba03e530292e69ab00cd9cea.exe
- Size 1.7MB
- Sample240622-bb1djazamf
- SHA256 c4c0310bc779bb4ba051be5fe124c783a101e9d0ba03e530292e69ab00cd9cea
Malware Config
Extracted
-
stealc
-
default
-
http://85.28.47.4
-
url_path
/920475a59bac849d.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
- Downloads MZ/PE file
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- 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 2 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 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.
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\c4c0310bc779bb4ba051be5fe124c783a101e9d0ba03e530292e69ab00cd9cea.exe"C:\Users\Admin\AppData\Local\Temp\c4c0310bc779bb4ba051be5fe124c783a101e9d0ba03e530292e69ab00cd9cea.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
mozglue.dll
nss3.dll
memory/3092-0-0x00000000006E0000-0x0000000000D5D000-memory.dmp
memory/3092-1-0x0000000076F06000-0x0000000076F08000-memory.dmp
memory/3092-2-0x00000000006E1000-0x00000000006F2000-memory.dmp
memory/3092-3-0x00000000006E0000-0x0000000000D5D000-memory.dmp
memory/3092-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/3092-76-0x00000000006E0000-0x0000000000D5D000-memory.dmp