Analysis
- max time kernel
90s - max time network
124s - platform
windows11-21h2_x64 - resource
win11-20240508-en - resource tags
- submitted
07/06/2024, 17:15
General
- Target c47920432d763bb2a5d8cdca03dd01509e326c7ab9a1cc0eb2fd2cd2c344c536.exe
- Size 2.5MB
- Sample240607-vsqefacd93
- SHA256 c47920432d763bb2a5d8cdca03dd01509e326c7ab9a1cc0eb2fd2cd2c344c536
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://t.me/r8z0l
-
https://steamcommunity.com/profiles/76561199698764354
-
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\c47920432d763bb2a5d8cdca03dd01509e326c7ab9a1cc0eb2fd2cd2c344c536.exe"C:\Users\Admin\AppData\Local\Temp\c47920432d763bb2a5d8cdca03dd01509e326c7ab9a1cc0eb2fd2cd2c344c536.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat8889.tmpC:\Users\Admin\AppData\Local\Temp\kat8889.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat8889.tmp
memory/4276-0-0x00000000025E0000-0x00000000025E1000-memory.dmp
memory/4276-2-0x0000000004110000-0x0000000004273000-memory.dmp
memory/4276-10-0x0000000000400000-0x000000000067A000-memory.dmp
memory/5052-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/5052-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/5052-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/5052-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/5052-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/5052-27-0x000000001B850000-0x000000001BAAF000-memory.dmp
memory/5052-42-0x0000000000400000-0x0000000000648000-memory.dmp
memory/5052-43-0x0000000000400000-0x0000000000648000-memory.dmp