Analysis
- max time kernel
147s - max time network
153s - platform
windows11-21h2_x64 - resource
win11-20240419-en - resource tags
- submitted
03/06/2024, 10:32
General
- Target 4c1595933a4df7b85db1fd6c52d8b526ea1cb1fa9a05d2191881b28ad3853694.exe
- Size 1.8MB
- Sample240603-mk7prabd5z
- SHA256 4c1595933a4df7b85db1fd6c52d8b526ea1cb1fa9a05d2191881b28ad3853694
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\4c1595933a4df7b85db1fd6c52d8b526ea1cb1fa9a05d2191881b28ad3853694.exe"C:\Users\Admin\AppData\Local\Temp\4c1595933a4df7b85db1fd6c52d8b526ea1cb1fa9a05d2191881b28ad3853694.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat6BCA.tmpC:\Users\Admin\AppData\Local\Temp\kat6BCA.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
kat6BCA.tmp
memory/2928-8-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2928-9-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2928-4-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2928-24-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2928-25-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2928-27-0x000000001DC80000-0x000000001DEDF000-memory.dmp
memory/2928-42-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2928-43-0x0000000000400000-0x0000000000649000-memory.dmp
memory/3000-0-0x0000000000890000-0x0000000000891000-memory.dmp
memory/3000-1-0x0000000002B90000-0x0000000002CDC000-memory.dmp
memory/3000-10-0x0000000000400000-0x00000000005CE000-memory.dmp