Analysis
- max time kernel
146s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
08/06/2024, 16:40
General
- Target aa36c426b0035a11cc4789b169e9744897667786cf23538b5ec01a3652f75667.exe
- Size 1.9MB
- Sample240608-t6hfbaec47
- SHA256 aa36c426b0035a11cc4789b169e9744897667786cf23538b5ec01a3652f75667
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 8 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 user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- 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
- Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\aa36c426b0035a11cc4789b169e9744897667786cf23538b5ec01a3652f75667.exe"C:\Users\Admin\AppData\Local\Temp\aa36c426b0035a11cc4789b169e9744897667786cf23538b5ec01a3652f75667.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat598A.tmpC:\Users\Admin\AppData\Local\Temp\kat598A.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat598A.tmp
memory/2804-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2804-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2804-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2804-15-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2804-16-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2804-18-0x0000000019400000-0x000000001965F000-memory.dmp
memory/2804-33-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2804-34-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3660-0-0x0000000002490000-0x0000000002491000-memory.dmp
memory/3660-2-0x00000000041F0000-0x0000000004353000-memory.dmp
memory/3660-10-0x0000000000400000-0x00000000005EE000-memory.dmp