We recently found and analyzed a malicious malware variant that disguised itself as a legitimate Mac-based trading app called Stockfolio. We found two variants of the malware family. The first one contains a pair of shell scripts and connects to a remote site to decrypt its encrypted codes while the second sample, despite using a simpler routine involving a single shell script, is actually incorporates a persistence mechanism.Read More
2016 was the year when ransomware reigned. Bad guys further weaponized extortion into malware, turning enterprises and end users into their cash cows by taking their crown jewels hostage. With 146 families discovered last year compared to 29 in 2015, ransomware’s rapid expansion and development are projected to spur cybercriminals into diversifying and expanding their platforms, capabilities, and techniques in order to accrue more targets.
Indeed, we’ve already seen them testing new waters by tapping the mobile user base, and more recently developing ransomware for other operating systems (OS) then peddling it underground to affiliates and budding cybercriminals. Linux.Encoder (detected by Trend Micro as ELF_CRYPTOR family) was reportedly the first for Linux systems; it targeted Linux web hosting systems through vulnerabilities in web-based plug-ins or software such as Magento’s. In Mac OS X systems, it was KeRanger (OSX_KERANGER)—found in tampered file-sharing applications and malicious Mach-O files disguised as a Rich Text Format (RTF) documents. Their common denominator? Unix.Read More
A critical Mac vulnerability was discovered by OS X security researcher Pedro Vilaca last week. According to his research, any attacker can disable the BIOS lock just by taking advantage of a flaw in Apple’s S3 sleep state (more known as ‘standby mode’) suspend-resume implementation. Once an attacker does this, he can install bootkit malware onto a Mac BIOS without…Read More
In an earlier blog post, we tackled what Wirelurker malware is and its security implications and risks for iOS and OSX devices. Within hours of the discovery of this malware, a Windows-based malware (detected as TROJ_WIRELURK.A) that performs the same attack was also seen in the wild. In this blog post, we’d like to share practices…Read More
The newly discovered Wirelurker malware affecting both OS X and iOS devices has been covered extensively in the media. While this is a significant incident, some of the coverage appears to have been exaggerated, and might lead users to unnecessary panic. Several points would be useful in helping calm down the worst fears of users and distilling…Read More