Analysis
- max time kernel
148s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240508-en - resource tags
- submitted
07/06/2024, 21:43
General
- Target 91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe
- Size 2.5MB
- Sample240607-1lebgseb68
- SHA256 91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b
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
-
C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe"C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat7290.tmpC:\Users\Admin\AppData\Local\Temp\kat7290.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\kat7290.tmp" & rd /s /q "C:\ProgramData\CBKJEGCBKKJE" & 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
kat7290.tmp
memory/4196-16-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-34-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-66-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-63-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-33-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-18-0x000000001B7F0000-0x000000001BA4F000-memory.dmp
memory/4196-62-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-15-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-50-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4196-51-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4980-0-0x00000000023D0000-0x00000000023D1000-memory.dmp
memory/4980-1-0x0000000002BB0000-0x0000000002D13000-memory.dmp
memory/4980-10-0x0000000000400000-0x000000000067A000-memory.dmp