Analysis
- max time kernel
17s - max time network
18s - platform
windows7_x64 - resource
win7-20240705-en - resource tags
- submitted
23/08/2024, 10:18
General
- Target file.exe
- Size 1.7MB
- Sample240823-mbyeqa1bpm
- SHA256 2141d9159c4fca891bba493acba71c5973b9d554e4b0552f4a87be7f3bcd112e
Malware Config
Extracted
-
stealc
-
nord
-
http://185.215.113.100
-
url_path
/e2b1563c6670f193.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
- 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.
- 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/828-0-0x00000000003E0000-0x0000000000A5C000-memory.dmp
memory/828-1-0x0000000077B40000-0x0000000077B42000-memory.dmp
memory/828-2-0x00000000003E1000-0x00000000003F5000-memory.dmp
memory/828-3-0x00000000003E0000-0x0000000000A5C000-memory.dmp
memory/828-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/828-42-0x00000000003E0000-0x0000000000A5C000-memory.dmp
memory/828-65-0x00000000003E0000-0x0000000000A5C000-memory.dmp
memory/828-66-0x00000000003E0000-0x0000000000A5C000-memory.dmp
memory/828-67-0x00000000003E0000-0x0000000000A5C000-memory.dmp