Analysis
- max time kernel
146s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240508-en - resource tags
- submitted
30/06/2024, 00:44
General
- Target 69c8cca4b1cd3dbae8f45b32fcd93a58c816d31834545456859a3f9fb1bb4ed3.exe
- Size 2.2MB
- Sample240630-a3t56a1arc
- SHA256 69c8cca4b1cd3dbae8f45b32fcd93a58c816d31834545456859a3f9fb1bb4ed3
Malware Config
Extracted
-
vidar
-
https://t.me/g067n
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https://steamcommunity.com/profiles/76561199707802586
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user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0
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 2 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\69c8cca4b1cd3dbae8f45b32fcd93a58c816d31834545456859a3f9fb1bb4ed3.exe"C:\Users\Admin\AppData\Local\Temp\69c8cca4b1cd3dbae8f45b32fcd93a58c816d31834545456859a3f9fb1bb4ed3.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat7C73.tmpC:\Users\Admin\AppData\Local\Temp\kat7C73.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\kat7C73.tmp" & rd /s /q "C:\ProgramData\FCFBAKJDBKJJ" & 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
kat7C73.tmp
memory/476-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-43-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-76-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-75-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-42-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-27-0x000000002D1A0000-0x000000002D3FF000-memory.dmp
memory/476-74-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-59-0x0000000000400000-0x0000000000648000-memory.dmp
memory/476-60-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2012-0-0x00000000023A0000-0x00000000023A1000-memory.dmp
memory/2012-1-0x0000000004070000-0x0000000004180000-memory.dmp
memory/2012-10-0x0000000000400000-0x0000000000635000-memory.dmp