Analysis
- max time kernel
139s - max time network
123s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
17/05/2024, 02:01
General
- Target def454f0d1da69d6c01caed4c7c1894441ba72e8153a9b4058f4407007aaf578.exe
- Size 829KB
- Sample240517-cflllsce92
- SHA256 def454f0d1da69d6c01caed4c7c1894441ba72e8153a9b4058f4407007aaf578
Malware Config
Extracted
-
stealc
Signatures
- Detect Vidar Stealer 11 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Detect binaries embedding considerable number of MFA browser extension IDs. 8 IoCs
- Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 8 IoCs
- Detects Windows executables referencing non-Windows User-Agents 11 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 8 IoCs
- Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 11 IoCs
- Detects executables containing potential Windows Defender anti-emulation checks 11 IoCs
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- 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 15 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\def454f0d1da69d6c01caed4c7c1894441ba72e8153a9b4058f4407007aaf578.exe"C:\Users\Admin\AppData\Local\Temp\def454f0d1da69d6c01caed4c7c1894441ba72e8153a9b4058f4407007aaf578.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
- Checks computer location settings
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\IIJDBGDGCGDA" & exit3⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 104⤵
- Delays execution with timeout.exe
-
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
memory/1352-3-0x00000000011D0000-0x00000000011D1000-memory.dmp
memory/1352-0-0x00000000011D0000-0x00000000011D1000-memory.dmp
memory/3776-17-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3776-6-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3776-7-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3776-16-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3776-1-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3776-19-0x000000001B7E0000-0x000000001BA3F000-memory.dmp
memory/3776-34-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3776-35-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3776-51-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3776-52-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3776-63-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3776-64-0x0000000000400000-0x0000000000646000-memory.dmp