Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
03/06/2024, 14:00
General
- Target 49f60ef0fd9ee94e5272d49bdfb95c56d0292b481818c020d12fc5a9e5c155a8.exe
- Size 1.8MB
- Sample240603-rbc61aab72
- SHA256 49f60ef0fd9ee94e5272d49bdfb95c56d0292b481818c020d12fc5a9e5c155a8
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\49f60ef0fd9ee94e5272d49bdfb95c56d0292b481818c020d12fc5a9e5c155a8.exe"C:\Users\Admin\AppData\Local\Temp\49f60ef0fd9ee94e5272d49bdfb95c56d0292b481818c020d12fc5a9e5c155a8.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat5999.tmpC:\Users\Admin\AppData\Local\Temp\kat5999.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat5999.tmp
memory/3060-0-0x00000000008A0000-0x00000000008A1000-memory.dmp
memory/3060-2-0x0000000002B60000-0x0000000002CAC000-memory.dmp
memory/3060-9-0x0000000000400000-0x00000000005CE000-memory.dmp
memory/4668-8-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4668-4-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4668-10-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4668-13-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4668-14-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4668-16-0x000000001B7B0000-0x000000001BA0F000-memory.dmp
memory/4668-31-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4668-32-0x0000000000400000-0x0000000000649000-memory.dmp