Analysis
- max time kernel
140s - max time network
124s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
17/05/2024, 01:28
General
- Target 5913b56762d3253e0d9cefdd62f311f2a1a902f643b4c4cdb0220d1a38a3dbf9.exe
- Size 228KB
- Sample240517-bvrkqsbb95
- SHA256 5913b56762d3253e0d9cefdd62f311f2a1a902f643b4c4cdb0220d1a38a3dbf9
Malware Config
Extracted
-
stealc
-
default11
-
http://185.172.128.170
-
url_path
/7043a0c6a68d9c65.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Detect binaries embedding considerable number of MFA browser extension IDs. 1 IoCs
- Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 1 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs
- Downloads MZ/PE file
- 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.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 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 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\5913b56762d3253e0d9cefdd62f311f2a1a902f643b4c4cdb0220d1a38a3dbf9.exe"C:\Users\Admin\AppData\Local\Temp\5913b56762d3253e0d9cefdd62f311f2a1a902f643b4c4cdb0220d1a38a3dbf9.exe"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1376 -s 23522⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1376 -ip 13761⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Are.docx
mozglue.dll
nss3.dll
memory/1376-2-0x00000000006F0000-0x0000000000717000-memory.dmp
memory/1376-3-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1376-1-0x0000000000750000-0x0000000000850000-memory.dmp
memory/1376-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/1376-88-0x0000000000400000-0x000000000063B000-memory.dmp