Analysis
- max time kernel
146s - max time network
154s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
07/06/2024, 19:09
General
- Target add786485fc8675163fb20e77a908a73fb70f80bc1661cf88dcbf0b73c97fda4.exe
- Size 2.5MB
- Sample240607-xt1ynscc6t
- SHA256 add786485fc8675163fb20e77a908a73fb70f80bc1661cf88dcbf0b73c97fda4
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\add786485fc8675163fb20e77a908a73fb70f80bc1661cf88dcbf0b73c97fda4.exe"C:\Users\Admin\AppData\Local\Temp\add786485fc8675163fb20e77a908a73fb70f80bc1661cf88dcbf0b73c97fda4.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat536F.tmpC:\Users\Admin\AppData\Local\Temp\kat536F.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
kat536F.tmp
memory/236-0-0x00000000023E0000-0x00000000023E1000-memory.dmp
memory/236-2-0x00000000040D0000-0x0000000004233000-memory.dmp
memory/236-9-0x0000000000400000-0x000000000067A000-memory.dmp
memory/2464-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2464-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2464-10-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2464-15-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2464-16-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2464-18-0x000000001B870000-0x000000001BACF000-memory.dmp
memory/2464-33-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2464-34-0x0000000000400000-0x0000000000648000-memory.dmp