Analysis
- max time kernel
90s - max time network
125s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
11/06/2024, 09:27
General
- Target 4d4bcdd6162a9e479c9b800c33eaca03b4de536ccaf86bd6299d048ffef345c8.exe
- Size 1.6MB
- Sample240611-lesszasepl
- SHA256 4d4bcdd6162a9e479c9b800c33eaca03b4de536ccaf86bd6299d048ffef345c8
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\4d4bcdd6162a9e479c9b800c33eaca03b4de536ccaf86bd6299d048ffef345c8.exe"C:\Users\Admin\AppData\Local\Temp\4d4bcdd6162a9e479c9b800c33eaca03b4de536ccaf86bd6299d048ffef345c8.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat4769.tmpC:\Users\Admin\AppData\Local\Temp\kat4769.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
kat4769.tmp
memory/2288-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2288-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2288-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2288-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2288-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2288-27-0x000000001DCB0000-0x000000001DF0F000-memory.dmp
memory/2288-35-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2288-36-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3356-0-0x0000000000830000-0x0000000000831000-memory.dmp
memory/3356-1-0x0000000004120000-0x0000000004230000-memory.dmp
memory/3356-10-0x0000000000400000-0x0000000000594000-memory.dmp