Analysis
- max time kernel
91s - max time network
92s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
25/05/2024, 01:01
General
- Target 06c5fda18c11b3bbadb3d3ddb4a71ab73ba22b2e913d1c26a9ae1d91816d2ebf.exe
- Size 2.0MB
- Sample240525-bdbg7agh8z
- SHA256 06c5fda18c11b3bbadb3d3ddb4a71ab73ba22b2e913d1c26a9ae1d91816d2ebf
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 14 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 data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- 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
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\06c5fda18c11b3bbadb3d3ddb4a71ab73ba22b2e913d1c26a9ae1d91816d2ebf.exe"C:\Users\Admin\AppData\Local\Temp\06c5fda18c11b3bbadb3d3ddb4a71ab73ba22b2e913d1c26a9ae1d91816d2ebf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat3B82.tmpC:\Users\Admin\AppData\Local\Temp\kat3B82.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat3B82.tmp" & rd /s /q "C:\ProgramData\AAEGHJKJKKJD" & exit3⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 104⤵
- Delays execution with timeout.exe
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
kat3B82.tmp
memory/3424-51-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-34-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-68-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-65-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-10-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-8-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-16-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-17-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-4-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-35-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-19-0x0000000019360000-0x00000000195BF000-memory.dmp
memory/3424-64-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-52-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3424-63-0x0000000000400000-0x0000000000646000-memory.dmp
memory/4344-0-0x0000000002370000-0x0000000002371000-memory.dmp
memory/4344-9-0x0000000000400000-0x000000000060C000-memory.dmp
memory/4344-2-0x0000000004080000-0x00000000041C9000-memory.dmp