To start, the legitimate Little Snitch installer is attractively and professionally packaged, with a well-made custom installer that is properly code signed. RUTracker post showing magnet link to malicious installer InstallationĪnalysis of this installer showed that there was definitely something strange going on. In fact, we discovered that not only was it malware, but a new Mac ransomware variant spreading via piracy. A post offered a torrent download for Little Snitch, and was soon followed by a number of comments that the download included malware.

The new name, ThiefQuest, is also more fitting for our updated understanding of the malware.Ī Twitter user going by the handle messaged me yesterday after learning of an apparently malicious Little Snitch installer available for download on a Russian forum dedicated to sharing torrent links.

The application (version 4) received a positive 4.5/5 review from Macworld.Editor’s note: The original name for the malware, EvilQuest, has been changed due to a legitimate game of the same name from 2012. Little Snitch's integral network monitor shows ongoing traffic in real time with domain names and traffic direction displayed. The dialog also allows the user to restrict the parameters of the connection, restricting it to a specific port, protocol, or domain. For that, a dialog is presented to the user, which allows one to deny or permit the connection on a one-time, time limited, or permanent basis. If an application or process attempts to establish a network connection, Little Snitch prevents the connection, if a rule for that connection has been set by the user. Until Little Snitch 4, it controlled network traffic by registering kernel extensions through the standard application programming interface (API) provided by Apple, but for its 5th release it switched to using Apple's Network Extensions due to the deprecation of Kernel Extensions on macOS Catalina. Unlike a stateful firewall, which is designed primarily to protect a system from external attacks by restricting inbound traffic, Little Snitch is designed to protect privacy by limiting outbound traffic. It is produced and maintained by the Austrian firm Objective Development Software GmbH. It can be used to monitor applications, preventing or permitting them to connect to attached networks through advanced rules. Little Snitch is a host-based application firewall for macOS.

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