Analysis
- max time kernel
149s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
12/03/2024, 19:10
General
- Target $TEMP/syncUpd.exe
- Size 200KB
- Sample240312-xvcbpsbb37
- SHA256 2b26a0dac779643189180d9e50ace8e299c5487a9a8cdaf4300cc64a9d674b33
Malware Config
Extracted
-
stealc
-
http://185.172.128.145
-
url_path
/3cd2b41cbde8fc9c.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- 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.
- 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).
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\$TEMP\syncUpd.exe"C:\Users\Admin\AppData\Local\Temp\$TEMP\syncUpd.exe"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
nss3.dll
memory/2868-51-0x0000000000680000-0x00000000006A7000-memory.dmp
memory/2868-43-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2868-50-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2868-1-0x00000000006C0000-0x00000000007C0000-memory.dmp
memory/2868-55-0x00000000006C0000-0x00000000007C0000-memory.dmp
memory/2868-56-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2868-69-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2868-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2868-3-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2868-83-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2868-85-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2868-2-0x0000000000680000-0x00000000006A7000-memory.dmp