Analysis
- max time kernel
148s - max time network
156s - platform
windows11-21h2_x64 - resource
win11-20240508-en - resource tags
- submitted
02/06/2024, 21:58
General
- Target 6599c0ad0bd43aaab42f1eccceabe783189134b3db65d45cbe52aad5658a516e.exe
- Size 2.4MB
- Sample240602-1vp5cahe62
- SHA256 6599c0ad0bd43aaab42f1eccceabe783189134b3db65d45cbe52aad5658a516e
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://t.me/ta904ek
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https://steamcommunity.com/profiles/76561199695752269
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user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
- Detect Vidar Stealer 13 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
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C:\Users\Admin\AppData\Local\Temp\6599c0ad0bd43aaab42f1eccceabe783189134b3db65d45cbe52aad5658a516e.exe"C:\Users\Admin\AppData\Local\Temp\6599c0ad0bd43aaab42f1eccceabe783189134b3db65d45cbe52aad5658a516e.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat668A.tmpC:\Users\Admin\AppData\Local\Temp\kat668A.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\kat668A.tmp" & rd /s /q "C:\ProgramData\JEBGIIDBKEBF" & 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
kat668A.tmp
memory/1820-50-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-33-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-4-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-66-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-8-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-10-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-63-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-15-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-19-0x000000001B860000-0x000000001BABF000-memory.dmp
memory/1820-16-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-34-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-62-0x0000000000400000-0x0000000000649000-memory.dmp
memory/1820-51-0x0000000000400000-0x0000000000649000-memory.dmp
memory/5104-0-0x0000000002500000-0x0000000002501000-memory.dmp
memory/5104-2-0x0000000002CB0000-0x0000000002DFC000-memory.dmp
memory/5104-9-0x0000000000400000-0x0000000000663000-memory.dmp