Analysis
- max time kernel
146s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
27/05/2024, 13:43
General
- Target 5fd6428d23731deee7ae724dbbf43732fc94857dbacb705d177a1d99baab8c46.exe
- Size 1.9MB
- Sample240527-q1krpsfe95
- SHA256 5fd6428d23731deee7ae724dbbf43732fc94857dbacb705d177a1d99baab8c46
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://steamcommunity.com/profiles/76561199689717899
-
https://t.me/copterwin
-
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\5fd6428d23731deee7ae724dbbf43732fc94857dbacb705d177a1d99baab8c46.exe"C:\Users\Admin\AppData\Local\Temp\5fd6428d23731deee7ae724dbbf43732fc94857dbacb705d177a1d99baab8c46.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat5999.tmpC:\Users\Admin\AppData\Local\Temp\kat5999.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat5999.tmp
memory/720-9-0x0000000000400000-0x0000000000646000-memory.dmp
memory/720-8-0x0000000000400000-0x0000000000646000-memory.dmp
memory/720-4-0x0000000000400000-0x0000000000646000-memory.dmp
memory/720-19-0x0000000000400000-0x0000000000646000-memory.dmp
memory/720-20-0x0000000000400000-0x0000000000646000-memory.dmp
memory/720-23-0x0000000028510000-0x000000002876F000-memory.dmp
memory/720-37-0x0000000000400000-0x0000000000646000-memory.dmp
memory/720-38-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3552-0-0x0000000002340000-0x0000000002341000-memory.dmp
memory/3552-1-0x0000000004140000-0x0000000004289000-memory.dmp
memory/3552-10-0x0000000000400000-0x00000000005EC000-memory.dmp