Analysis
- max time kernel
134s - max time network
299s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
13/06/2024, 23:16
General
- Target 6b65cba2774d3a4de74304dfbeec59bde59a706fbceca719d4c1c0c9c5f1c1c7.exe
- Size 1.6MB
- Sample240613-285ydsvcrd
- SHA256 6b65cba2774d3a4de74304dfbeec59bde59a706fbceca719d4c1c0c9c5f1c1c7
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 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 4 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\6b65cba2774d3a4de74304dfbeec59bde59a706fbceca719d4c1c0c9c5f1c1c7.exe"C:\Users\Admin\AppData\Local\Temp\6b65cba2774d3a4de74304dfbeec59bde59a706fbceca719d4c1c0c9c5f1c1c7.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat6467.tmpC:\Users\Admin\AppData\Local\Temp\kat6467.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\kat6467.tmp" & rd /s /q "C:\ProgramData\AKJDGIEHCAEH" & 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
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Downloads
kat6467.tmp
memory/436-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/436-26-0x0000000000400000-0x0000000000648000-memory.dmp
memory/436-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/436-60-0x0000000000400000-0x0000000000648000-memory.dmp
memory/436-10-0x0000000000400000-0x0000000000648000-memory.dmp
memory/436-57-0x0000000000400000-0x0000000000648000-memory.dmp
memory/436-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/436-56-0x0000000000400000-0x0000000000648000-memory.dmp
memory/436-29-0x0000000028340000-0x000000002859F000-memory.dmp
memory/436-43-0x0000000000400000-0x0000000000648000-memory.dmp
memory/436-44-0x0000000000400000-0x0000000000648000-memory.dmp
memory/512-1-0x0000000003E00000-0x0000000003F10000-memory.dmp
memory/512-0-0x00000000021B0000-0x00000000021B1000-memory.dmp
memory/512-9-0x0000000000400000-0x0000000000594000-memory.dmp