Analysis
- max time kernel
146s - max time network
153s - platform
windows11-21h2_x64 - resource
win11-20240611-en - resource tags
- submitted
14/06/2024, 03:28
General
- Target 86e04aa7c1b0e77e6c1d8da16384b762e594b13e3394d534e57c2d5427a69416.exe
- Size 2.1MB
- Sample240614-d1d8psxdpn
- SHA256 86e04aa7c1b0e77e6c1d8da16384b762e594b13e3394d534e57c2d5427a69416
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 15 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\86e04aa7c1b0e77e6c1d8da16384b762e594b13e3394d534e57c2d5427a69416.exe"C:\Users\Admin\AppData\Local\Temp\86e04aa7c1b0e77e6c1d8da16384b762e594b13e3394d534e57c2d5427a69416.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat4D26.tmpC:\Users\Admin\AppData\Local\Temp\kat4D26.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\kat4D26.tmp" & rd /s /q "C:\ProgramData\FIDHCFBAKFBG" & exit3⤵
- Suspicious use of WriteProcessMemory
-
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
kat4D26.tmp
memory/4364-23-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-59-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-73-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-72-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-22-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-71-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-34-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-33-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-42-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-43-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4364-25-0x0000000026050000-0x00000000262AF000-memory.dmp
memory/4364-60-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4736-0-0x00000000026D0000-0x00000000026D1000-memory.dmp
memory/4736-1-0x0000000004190000-0x00000000042A0000-memory.dmp
memory/4736-10-0x0000000000400000-0x0000000000629000-memory.dmp