Analysis
- max time kernel
90s - max time network
124s - platform
windows11-21h2_x64 - resource
win11-20240611-en - resource tags
- submitted
14/06/2024, 09:08
General
- Target aa427a0438a566605f1bcdd9ad8fe73a1b07902b295fdf2698d795439871cb5a.exe
- Size 2.0MB
- Sample240614-k4bejsxflq
- SHA256 aa427a0438a566605f1bcdd9ad8fe73a1b07902b295fdf2698d795439871cb5a
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\aa427a0438a566605f1bcdd9ad8fe73a1b07902b295fdf2698d795439871cb5a.exe"C:\Users\Admin\AppData\Local\Temp\aa427a0438a566605f1bcdd9ad8fe73a1b07902b295fdf2698d795439871cb5a.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat518B.tmpC:\Users\Admin\AppData\Local\Temp\kat518B.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat518B.tmp
memory/3904-0-0x0000000002490000-0x0000000002491000-memory.dmp
memory/3904-1-0x0000000002CE0000-0x0000000002DF0000-memory.dmp
memory/3904-9-0x0000000000400000-0x00000000005FD000-memory.dmp
memory/3960-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3960-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3960-10-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3960-22-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3960-23-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3960-25-0x0000000026030000-0x000000002628F000-memory.dmp
memory/3960-33-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3960-34-0x0000000000400000-0x0000000000648000-memory.dmp