Perpetrators behind ransomware have moved away from targeting consumers and tailored their attacks to extort small and medium-sized businesses (SMBs).This business segment make potentially good targets for ransomware since small businesses are less likely to have the sophisticated solutions that enterprises have. And at the same time, the owners often have the capacity to pay….Read More
Crypto-ransomware is once again upping the ante with its routines. We came across one crypto-ransomware variant that’s combined with spyware—a first for crypto-ransomware. This development just comes at the heels of the discovery that ransomware has included file infection to its routines. CryptoWall 3.0 We first encountered CryptoWall as the payload of spammed messages last year. We…Read More
Ransomware has been one of the most prevalent, prolific, and pervasive threats in the 2017 threat landscape, with financial losses among enterprises and end users now likely to have reached billions of dollars. Locky ransomware, in particular, has come a long way since first emerging in early 2016. Despite the number of times it apparently spent in hiatus, Locky remains a relevant and credible threat given its impact on end users and especially businesses. Our detections show that it’s making another comeback with new campaigns.
A closer look at the file-encrypting malware’s activities reveals a constant: the use of spam. While they remain a major entry point for ransomware, Locky appears to be concentrating its distribution through large-scale spam campaigns of late, regardless of the variants released by its operators/developers.Read More
A new ransomware is being distributed by the Magnitude exploit kit: Magniber (detected by Trend Micro as RANSOM_MAGNIBER.A), which we found targeting South Korea via malvertisements on attacker-owned domains/sites. The development in Magnitude’s activity is notable not only because it eschewed Cerber—its usual ransomware payload—in favor of Magniber. Magnitude now also appears to have become an exploit kit expressly targeting South Korean end users.
The Magnitude exploit kit, which previously had a global reach, was offered as a service in the cybercriminal underground as early as 2013. It then left the market and became a private exploit kit that mainly distributed ransomware such as CryptoWall. At the start of the second half of 2016, Magnitude shifted focus to Asian countries, delivering various ransomware such as Locky and Cerber. More recently though, we noticed that Magnitude underwent a hiatus that began on September 23, 2017, and it then returned on October 15. With help from Kafeine and malc0de, we were able to uncover Magnitude’s new payload, Magniber.Read More
The latter half of 2016 saw a major shift in the exploit kit landscape, with many established kits suddenly dropping operations or switching business models. As we discussed in our 2016 Security Roundup, Angler, which has dominated the market since 2015, suddenly went silent. We tracked 3.4 million separate Angler attacks on our clients in…Read More