Analysis
- max time kernel
92s - max time network
95s - platform
windows11-21h2_x64 - resource
win11-20240611-en - resource tags
- submitted
12/06/2024, 23:36
General
- Target 4808a13f7c0efc31d80758e3354c421b9221e66b8799ae9ac6d4fb2fb5c04650.exe
- Size 2.1MB
- Sample240612-3lqevsvgla
- SHA256 4808a13f7c0efc31d80758e3354c421b9221e66b8799ae9ac6d4fb2fb5c04650
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 15 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 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\4808a13f7c0efc31d80758e3354c421b9221e66b8799ae9ac6d4fb2fb5c04650.exe"C:\Users\Admin\AppData\Local\Temp\4808a13f7c0efc31d80758e3354c421b9221e66b8799ae9ac6d4fb2fb5c04650.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat47A8.tmpC:\Users\Admin\AppData\Local\Temp\kat47A8.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\kat47A8.tmp" & rd /s /q "C:\ProgramData\DAKFCGIJKJKF" & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 104⤵
- Delays execution with timeout.exe
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat47A8.tmp
memory/3588-10-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3588-2-0x0000000002A30000-0x0000000002B40000-memory.dmp
memory/3588-0-0x00000000023A0000-0x00000000023A1000-memory.dmp
memory/4252-14-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-13-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-16-0x000000001B8B0000-0x000000001BB0F000-memory.dmp
memory/4252-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-33-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-34-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-50-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-51-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-62-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-63-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4252-64-0x0000000000400000-0x0000000000648000-memory.dmp