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The most commonly used distribution techniques include: drive-by (stealthy/deceptive) downloads, malicious attachments/links in spam emails and messages, online scams, dubious download channels (e.g., unofficial and freeware websites, Peer-to-Peer sharing networks, etc.), illegal program activation tools ("cracks"), and fake updates.
#Tenfourfox for mac os x 10.4 software#
Malicious software is usually disguised as or bundled with ordinary content. Generally, malware is spread by employing phishing and social engineering tactics. It is just as likely that other methods are used to spread RShell/ malicious MìMì apps. However, how the webpage (and its potential mirror sites) are promoted can vary. RShell is proliferated via trojanized MìMì messaging applications, which are available on the app's official website. Hence, all threats must be eliminated immediately upon detection.
However, regardless of how malware operates - its presence on a system endangers device/user safety. Since this malware is capable of injecting additional malicious content into systems, the threats posed by the resulting infections are especially broad. We have analyzed countless Mac-specific malicious programs macOS.Macma, OceanLotus, and .20 are just a few examples of backdoor-types targeting macOS. Combo Cleaner is owned and operated by Rcs Lt, the parent company of read more.
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To use full-featured product, you have to purchase a license for Combo Cleaner. Our security researchers recommend using Combo Cleaner. To eliminate possible malware infections, scan your Mac with legitimate antivirus software. Trojanized MìMì messenger apps, infected email attachments, fake Adobe Flash Player installers, malicious online advertisements, social engineering, software 'cracks'.ĭata and financial losses, loss of access to personal accounts, problems with browsing safety, online privacy issues. Trojans-type malware is designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine.
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Mac malware, Mac virus, Trojan, password-stealing virus, spyware.ĪhnLab-V3 (Backdoor/OSX.Agent.253664), ALYac (), Kaspersky (HEUR:), Lionic (!c), Symantec (), Full List ( VirusTotal) If you suspect that your device is infected with RShell (or other malware), we strongly recommend using an anti-virus to remove it without delay. To summarize, RShell may cause multiple system infections, severe privacy issues, financial losses, and even lead to identity theft. However, if APT27 is behind this malware - it would be the first time they have targeted Mac operating systems. Trojanized MìMì versions might be proliferated under the guise of a messenger capable of bypassing China's censorship laws.ĪPT27 being behind RShell is entirely believable since it would not be the first instance of this group using malicious apps like MìMì. Their researchers speculated that due to MìMì's minimal popularity in China - it could be a targeted domestic surveillance tool.
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However, TrendMicro researchers found different versions of MìMì carrying payloads for Linux and Windows OSes.Īs mentioned in the introduction, SEKOIA found evidence linking RShell to the APT27 cyber-espionage group but could not determine the exact purpose of this malicious program. In other words, it is unclear whether the app was intended to be used maliciously from the beginning or whether it was repurposed. While SEKOIA researchers discovered that MìMì 2.3.0 (released on the 26th of May, 2022) was the first trojanized version targeting macOS, they were unable to determine whether the app or its developers (Xiamen Baiquan Information Technology Co. It is a cross-platform messenger available for macOS, Windows, Android, and iOS.
RShell is introduced into Mac operating systems by the MìMì messaging application. Since RShell is linked to a cyber-espionage group, the malicious injections are likely to focus on spying and data stealing. Generally, backdoor malware can infiltrate various trojans, ransomware, cryptocurrency miners, and other malicious programs into systems. It can also execute commands received from the C&C server, including the download/execution of malicious files. RShell collects system information (e.g., device name, IP address/ geolocation, etc.) and sends it to the Command and Control (C&C) server.
Research done by SEKOIA strongly suggests that RShell infections are linked to the APT27 (aka Iron Tiger, Luckymouse, Emissary Panda, Bronze Union, and TG-3390) cyber-espionage group, which primarily focuses its activities in Southeast Asia. RShell is infiltrated into macOS by trojanized the Chinese-language MìMì (MiMi, Mi) Electron messenger app. Malicious software within this classification can execute commands and is typically used to collect data and infect systems with additional malware. RShell refers to a backdoor-type malware targeting Mac Operating Systems (macOS).