Analysis
- max time kernel
121s - max time network
122s - platform
windows7_x64 - resource
win7-20241023-en - resource tags
- submitted
24/10/2024, 17:28
General
- Target file.exe
- Size 1.8MB
- Sample241024-v1237sygnr
- SHA256 2202c6a6673d6a90682946b94edfc8c6bac495997e064c62b36bc0f046457a51
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/2160-0-0x0000000000830000-0x0000000000ED2000-memory.dmp
memory/2160-1-0x0000000077A30000-0x0000000077A32000-memory.dmp
memory/2160-2-0x0000000000831000-0x0000000000854000-memory.dmp
memory/2160-3-0x0000000000830000-0x0000000000ED2000-memory.dmp
memory/2160-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2160-42-0x0000000000830000-0x0000000000ED2000-memory.dmp
memory/2160-43-0x0000000000830000-0x0000000000ED2000-memory.dmp
memory/2160-50-0x0000000000830000-0x0000000000ED2000-memory.dmp
memory/2160-67-0x0000000000830000-0x0000000000ED2000-memory.dmp