Analysis
- max time kernel
146s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240611-en - resource tags
- submitted
28/06/2024, 09:40
General
- Target a97a6c75928c3d615ec0a47dd89453e58ca43c2a4a7ed3fbe4776ad62cb93151.exe
- Size 1.5MB
- Sample240628-lnhpcsvhmn
- SHA256 a97a6c75928c3d615ec0a47dd89453e58ca43c2a4a7ed3fbe4776ad62cb93151
Malware Config
Extracted
-
vidar
-
https://t.me/g067n
-
https://steamcommunity.com/profiles/76561199707802586
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0
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 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\a97a6c75928c3d615ec0a47dd89453e58ca43c2a4a7ed3fbe4776ad62cb93151.exe"C:\Users\Admin\AppData\Local\Temp\a97a6c75928c3d615ec0a47dd89453e58ca43c2a4a7ed3fbe4776ad62cb93151.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat39AD.tmpC:\Users\Admin\AppData\Local\Temp\kat39AD.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat39AD.tmp
memory/4092-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4092-10-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4092-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4092-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4092-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4092-27-0x0000000022780000-0x00000000229DF000-memory.dmp
memory/4092-35-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4092-36-0x0000000000400000-0x0000000000648000-memory.dmp
memory/5056-0-0x00000000022C0000-0x00000000022C1000-memory.dmp
memory/5056-2-0x0000000003FB0000-0x00000000040C0000-memory.dmp
memory/5056-9-0x0000000000400000-0x000000000058E000-memory.dmp