Analysis
- max time kernel
146s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
28/05/2024, 14:03
General
- Target f430a4eaeefef44a8b099a62f38a25525eed5af65928a720810c16f5cfeae3f5.exe
- Size 2.6MB
- Sample240528-rc4eksgc9s
- SHA256 f430a4eaeefef44a8b099a62f38a25525eed5af65928a720810c16f5cfeae3f5
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\f430a4eaeefef44a8b099a62f38a25525eed5af65928a720810c16f5cfeae3f5.exe"C:\Users\Admin\AppData\Local\Temp\f430a4eaeefef44a8b099a62f38a25525eed5af65928a720810c16f5cfeae3f5.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat4CC8.tmpC:\Users\Admin\AppData\Local\Temp\kat4CC8.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat4CC8.tmp
memory/1180-8-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1180-4-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1180-10-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1180-19-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1180-20-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1180-22-0x0000000026060000-0x00000000262BF000-memory.dmp
memory/1180-37-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1180-38-0x0000000000400000-0x0000000000646000-memory.dmp
memory/1472-0-0x00000000025F0000-0x00000000025F1000-memory.dmp
memory/1472-1-0x00000000040C0000-0x0000000004209000-memory.dmp
memory/1472-9-0x0000000000400000-0x000000000069E000-memory.dmp