Analysis
- max time kernel
91s - max time network
99s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
07/06/2024, 21:52
General
- Target 0594d4ba4bfaef1ef5f5322dcb51ac0b4de3bb1798d821a1b49ce3e4937c68e6.exe
- Size 2.5MB
- Sample240607-1rejfaec32
- SHA256 0594d4ba4bfaef1ef5f5322dcb51ac0b4de3bb1798d821a1b49ce3e4937c68e6
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 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\0594d4ba4bfaef1ef5f5322dcb51ac0b4de3bb1798d821a1b49ce3e4937c68e6.exe"C:\Users\Admin\AppData\Local\Temp\0594d4ba4bfaef1ef5f5322dcb51ac0b4de3bb1798d821a1b49ce3e4937c68e6.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat43CF.tmpC:\Users\Admin\AppData\Local\Temp\kat43CF.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\kat43CF.tmp" & rd /s /q "C:\ProgramData\FIDGHIIECGHD" & 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
kat43CF.tmp
memory/1432-50-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-33-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-64-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-63-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-15-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-18-0x000000001B800000-0x000000001BA5F000-memory.dmp
memory/1432-16-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-34-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-62-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1432-51-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3812-0-0x0000000002620000-0x0000000002621000-memory.dmp
memory/3812-1-0x0000000004250000-0x00000000043B3000-memory.dmp
memory/3812-10-0x0000000000400000-0x000000000067A000-memory.dmp