Analysis
- max time kernel
117s - max time network
118s - platform
windows7_x64 - resource
win7-20240903-en - resource tags
- submitted
12/10/2024, 01:00
General
- Target file.exe
- Size 1.8MB
- Sample241012-bcnfcstemb
- SHA256 13bc8dcdea6abde202eba28d90aa7dba0ce863356e5cd8b41f2c33d24bcf5d66
Malware Config
Extracted
-
stealc
-
doma
-
http://185.215.113.37
-
url_path
/e2b1563c6670f193.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 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
- 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
- System Location Discovery: System Language Discovery 1 TTPs 1 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.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.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
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Enterprise v15
Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
4Credentials In Files
4Replay Monitor
Loading Replay Monitor...
Downloads
mozglue.dll
nss3.dll
memory/2532-0-0x0000000001000000-0x00000000016A7000-memory.dmp
memory/2532-1-0x0000000077970000-0x0000000077972000-memory.dmp
memory/2532-2-0x0000000001001000-0x0000000001024000-memory.dmp
memory/2532-3-0x0000000001000000-0x00000000016A7000-memory.dmp
memory/2532-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2532-42-0x0000000001000000-0x00000000016A7000-memory.dmp
memory/2532-65-0x0000000001000000-0x00000000016A7000-memory.dmp
memory/2532-66-0x0000000001000000-0x00000000016A7000-memory.dmp
memory/2532-68-0x0000000001000000-0x00000000016A7000-memory.dmp