Analysis
- max time kernel
190s - max time network
297s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
06/06/2024, 23:02
General
- Target 2325e1c14527187f7fe5e1aee8cacfc1f5a6a21dbc4dcc75f10fc5c00a90592b.exe
- Size 2.4MB
- Sample240606-21mf3sec94
- SHA256 2325e1c14527187f7fe5e1aee8cacfc1f5a6a21dbc4dcc75f10fc5c00a90592b
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://t.me/ta904ek
-
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 12 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\2325e1c14527187f7fe5e1aee8cacfc1f5a6a21dbc4dcc75f10fc5c00a90592b.exe"C:\Users\Admin\AppData\Local\Temp\2325e1c14527187f7fe5e1aee8cacfc1f5a6a21dbc4dcc75f10fc5c00a90592b.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\katD68A.tmpC:\Users\Admin\AppData\Local\Temp\katD68A.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\katD68A.tmp" & rd /s /q "C:\ProgramData\EBKEHJJDAAAA" & 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
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Downloads
katD68A.tmp
memory/2040-9-0x0000000000400000-0x0000000000663000-memory.dmp
memory/2040-2-0x0000000003ED0000-0x000000000401C000-memory.dmp
memory/2040-0-0x00000000007F0000-0x00000000007F1000-memory.dmp
memory/4324-17-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4324-8-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4324-10-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4324-16-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4324-4-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4324-20-0x000000001B6F0000-0x000000001B94F000-memory.dmp
memory/4324-30-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4324-31-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4324-43-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4324-44-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4324-45-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4324-46-0x0000000000400000-0x0000000000649000-memory.dmp