Analysis
- max time kernel
150s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
09/06/2024, 06:45
General
- Target ca3be91ce6fe8567e35132093f60a5a139714fcc2b155da7e54ae7fde4f17cc1.exe
- Size 1.9MB
- Sample240609-hjekcsfa8t
- SHA256 ca3be91ce6fe8567e35132093f60a5a139714fcc2b155da7e54ae7fde4f17cc1
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\ca3be91ce6fe8567e35132093f60a5a139714fcc2b155da7e54ae7fde4f17cc1.exe"C:\Users\Admin\AppData\Local\Temp\ca3be91ce6fe8567e35132093f60a5a139714fcc2b155da7e54ae7fde4f17cc1.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat3E8F.tmpC:\Users\Admin\AppData\Local\Temp\kat3E8F.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
kat3E8F.tmp
memory/1532-0-0x0000000002340000-0x0000000002341000-memory.dmp
memory/1532-2-0x00000000040A0000-0x0000000004203000-memory.dmp
memory/1532-10-0x0000000000400000-0x00000000005EE000-memory.dmp
memory/4628-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4628-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4628-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4628-15-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4628-16-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4628-18-0x00000000193C0000-0x000000001961F000-memory.dmp
memory/4628-33-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4628-34-0x0000000000400000-0x0000000000648000-memory.dmp