Analysis
- max time kernel
90s - max time network
126s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
31/05/2024, 10:31
General
- Target 4f3eadda06dae3308e632fd4ccdd0778c82bd0cebac2db6374d7240d9f8a7634.exe
- Size 2.4MB
- Sample240531-mkghkafd44
- SHA256 4f3eadda06dae3308e632fd4ccdd0778c82bd0cebac2db6374d7240d9f8a7634
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://t.me/ta904ek
-
https://steamcommunity.com/profiles/76561199695752269
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
- Detect Vidar Stealer 8 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- 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.
- Suspicious use of SetThreadContext 1 IoCs
- Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\4f3eadda06dae3308e632fd4ccdd0778c82bd0cebac2db6374d7240d9f8a7634.exe"C:\Users\Admin\AppData\Local\Temp\4f3eadda06dae3308e632fd4ccdd0778c82bd0cebac2db6374d7240d9f8a7634.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat5592.tmpC:\Users\Admin\AppData\Local\Temp\kat5592.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
kat5592.tmp
memory/3512-0-0x0000000000920000-0x0000000000921000-memory.dmp
memory/3512-1-0x00000000040E0000-0x000000000422C000-memory.dmp
memory/3512-9-0x0000000000400000-0x0000000000663000-memory.dmp
memory/3992-4-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3992-8-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3992-10-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3992-24-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3992-25-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3992-27-0x000000001B860000-0x000000001BABF000-memory.dmp
memory/3992-42-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3992-43-0x0000000000400000-0x0000000000649000-memory.dmp