Analysis
- max time kernel
193s - max time network
255s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
06/06/2024, 22:38
General
- Target 04372ab66212b646a8a8623235d5dafc9f138a42dbeb28c22d9cf4edb944019c.exe
- Size 2.4MB
- Sample240606-2kc8gaeb29
- SHA256 04372ab66212b646a8a8623235d5dafc9f138a42dbeb28c22d9cf4edb944019c
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://t.me/ta904ek
-
https://steamcommunity.com/profiles/76561199695752269
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
- Detect Vidar Stealer 11 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 8 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\04372ab66212b646a8a8623235d5dafc9f138a42dbeb28c22d9cf4edb944019c.exe"C:\Users\Admin\AppData\Local\Temp\04372ab66212b646a8a8623235d5dafc9f138a42dbeb28c22d9cf4edb944019c.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat5A36.tmpC:\Users\Admin\AppData\Local\Temp\kat5A36.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\kat5A36.tmp" & rd /s /q "C:\ProgramData\AKJDGIEHCAEH" & 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
kat5A36.tmp
memory/2464-19-0x000000001B6E0000-0x000000001B93F000-memory.dmp
memory/2464-17-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2464-51-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2464-9-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2464-10-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2464-48-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2464-16-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2464-4-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2464-47-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2464-34-0x0000000000400000-0x0000000000649000-memory.dmp
memory/2464-35-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4896-0-0x00000000007F0000-0x00000000007F1000-memory.dmp
memory/4896-8-0x0000000000400000-0x0000000000663000-memory.dmp
memory/4896-2-0x0000000003F20000-0x000000000406C000-memory.dmp