Analysis
- max time kernel
93s - max time network
95s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
08/06/2024, 00:20
General
- Target 50f36d956ea61818302de3f94c06e817.exe
- Size 2.5MB
- Sample240608-amrebsfd44
- SHA256 51be56a8c497af205e47e6159654ea4b6e577491bec049974a1124c9c1f7c3c2
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 13 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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\50f36d956ea61818302de3f94c06e817.exe"C:\Users\Admin\AppData\Local\Temp\50f36d956ea61818302de3f94c06e817.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat5072.tmpC:\Users\Admin\AppData\Local\Temp\kat5072.tmp2⤵
- Checks computer location settings
- Executes dropped EXE
- 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 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat5072.tmp" & rd /s /q "C:\ProgramData\ECGDHIDAAFHI" & 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
kat5072.tmp
memory/1168-14-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-32-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-64-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-61-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-31-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-16-0x000000001B7B0000-0x000000001BA0F000-memory.dmp
memory/1168-60-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-13-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-48-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1168-49-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2648-0-0x00000000022D0000-0x00000000022D1000-memory.dmp
memory/2648-10-0x0000000000400000-0x000000000067A000-memory.dmp
memory/2648-1-0x0000000002B40000-0x0000000002CA3000-memory.dmp