Analysis
- max time kernel
149s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
02/06/2024, 11:15
General
- Target 737a1b8b6179dca7bba24196b8f6cb43e9da7e191be966d7105aacdc4f58b382.exe
- Size 2.4MB
- Sample240602-ncy83scb63
- SHA256 737a1b8b6179dca7bba24196b8f6cb43e9da7e191be966d7105aacdc4f58b382
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\737a1b8b6179dca7bba24196b8f6cb43e9da7e191be966d7105aacdc4f58b382.exe"C:\Users\Admin\AppData\Local\Temp\737a1b8b6179dca7bba24196b8f6cb43e9da7e191be966d7105aacdc4f58b382.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat48F0.tmpC:\Users\Admin\AppData\Local\Temp\kat48F0.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat48F0.tmp
memory/1276-0-0x00000000025D0000-0x00000000025D1000-memory.dmp
memory/1276-2-0x00000000040E0000-0x000000000422C000-memory.dmp
memory/1276-10-0x0000000000400000-0x0000000000663000-memory.dmp
memory/2844-7-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2844-8-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2844-9-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2844-15-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2844-16-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2844-19-0x0000000019420000-0x000000001967F000-memory.dmp
memory/2844-33-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2844-34-0x0000000000400000-0x0000000000649000-memory.dmp