Analysis
- max time kernel
90s - max time network
129s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
04/06/2024, 02:43
General
- Target c765d999b18acb3aded03d2f77cdb32ac4d435640167b31ba5f7b10aed4b59f3.exe
- Size 1.8MB
- Sample240604-c7nv2sbc24
- SHA256 c765d999b18acb3aded03d2f77cdb32ac4d435640167b31ba5f7b10aed4b59f3
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\c765d999b18acb3aded03d2f77cdb32ac4d435640167b31ba5f7b10aed4b59f3.exe"C:\Users\Admin\AppData\Local\Temp\c765d999b18acb3aded03d2f77cdb32ac4d435640167b31ba5f7b10aed4b59f3.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat5C97.tmpC:\Users\Admin\AppData\Local\Temp\kat5C97.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
kat5C97.tmp
memory/2112-8-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2112-10-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2112-4-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2112-24-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2112-25-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2112-28-0x000000001B8E0000-0x000000001BB3F000-memory.dmp
memory/2112-42-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2112-43-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4372-0-0x0000000002460000-0x0000000002461000-memory.dmp
memory/4372-1-0x00000000041F0000-0x000000000433C000-memory.dmp
memory/4372-9-0x0000000000400000-0x00000000005CE000-memory.dmp