Lock Saver Free, is a tweak that we featured in iDownload Blog new tweaks of the week video last night and was published by a developer known as dmarinov.

It has been confirmed that it embeds a trojan in my /Library/MobileSubstrate/DynamicLibraries/ directory.

this tweak is unfortunately still available for download on ModMyi as of this post, but hopefully it will be removed soon.

The tweak downloaded Service.dylib at runtime it made /Library/MobileSubstrate/DynamicLibraries/ writeable to all users. The /Library/MobileSubstrate/DynamicLibraries/ directory should have the permissions 755, but due to this tweak, the permissions are changed to 777, which means writable for all users and groups.

Please Avoid Lock Saver Free at all costs.

If you installed Lock Saver Free, you should immediately uninstall the tweak and navigate to /Library/MobileSubstrate/DynamicLibraries/ and delete the two offending files: Service.dylib and Service.plist. Even if you uninstall the tweak, it will still leave those two files behind, so you’ll have to manually delete them. 

Alternatively you can install serviceremover from here by Tony Kraft. 

Source: iDownloadBlog