Earlier this year, Action Fraud, the UK’s fraud and cybercrime reporting center, issued a warning that cyber criminals were taking advantage of generous individuals by sending phishing emails purportedly from Migrant Helpline, a charity organization dedicated to assisting migrants across the country. These emails contain a link that is supposed to lead to a donations page. However, instead of landing on a legitimate website, the user instead unwittingly downloads one of the most tenacious malwares in the wild: the veteran Trojan known as RAMNIT, which staged a comeback in 2016.Read More
Thanks to the Internet of Things (IoT), the world is now much more connected. While IoT brings about many benefits and has made life easier for us, there are some important questions we still have to ask: is IoT also making the world a little less secure? More importantly, is IoT making us vulnerable to attackers?Read More
CERBER is a ransomware family that has seen its share of unusual features since its appearance early last year. From its use of audio warnings, to the targeting of cloud platforms and databases, to distribution via malvertising, emailed scripting files, and exploit kits, CERBER has always been willing to keep up with the times, as it was. One reason for its apparent popularity may be the fact that it is sold in the Russian underground, giving a wide variety of cybercriminals access to it.
However, we’ve started seeing CERBER variants (which we detect as RANSOM_CERBER.F117AK) add a new wrinkle to their behavior: they have gone out of their way to avoid encrypting security software. How did they do this?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
Fileless infections are exactly what their namesake says: they’re infections that don’t involve malicious files being downloaded or written to the system’s disk. While fileless infections are not necessarily new or rare, it presents a serious threat to enterprises and end users given its capability to gain privileges and persist in the system of interest to an attacker—all while staying under the radar. For instance, fileless infections have been incorporated in a targeted bot delivery, leveraged to deliver ransomware, infect point-of-sale (PoS) systems, and perpetrate click fraud. The key point of the fileless infection for the attacker is to be able to evaluate each compromised system and make a decision whether the infection process should continue or vanish without a trace.
The cybercriminal group Lurk was one of the first to effectively employ fileless infection techniques in large-scale attacks—techniques that arguably became staples for other malefactors.Read More