Analysis
- max time kernel
133s - max time network
298s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
07/06/2024, 01:14
General
- Target befbd7795cd8f3202ecf6aaab76d176a708da6b9a08c9026f33ec3c35ea5985f.exe
- Size 2.4MB
- Sample240607-bl5e8sgb32
- SHA256 befbd7795cd8f3202ecf6aaab76d176a708da6b9a08c9026f33ec3c35ea5985f
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 6 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 10 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\befbd7795cd8f3202ecf6aaab76d176a708da6b9a08c9026f33ec3c35ea5985f.exe"C:\Users\Admin\AppData\Local\Temp\befbd7795cd8f3202ecf6aaab76d176a708da6b9a08c9026f33ec3c35ea5985f.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat6AA1.tmpC:\Users\Admin\AppData\Local\Temp\kat6AA1.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
kat6AA1.tmp
memory/1292-0-0x00007FFB0BA10000-0x00007FFB0BBEB000-memory.dmp
memory/1292-8-0x0000000000400000-0x0000000000663000-memory.dmp
memory/2716-3-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2716-9-0x00007FFB0BA10000-0x00007FFB0BBEB000-memory.dmp
memory/2716-7-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2716-24-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2716-25-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2716-27-0x0000000025F30000-0x000000002618F000-memory.dmp
memory/2716-42-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2716-43-0x0000000000400000-0x0000000000649000-memory.dmp