We recently discovered a new campaign that we dubbed “Operation Overtrap” for the numerous ways it can infect or trap victims with its payload. The campaign mainly targets online users of various Japanese banks by stealing their banking credentials using a three-pronged attack. Based on our telemetry, Operation Overtrap has been active since April 2019 and has been solely targeting online banking users located in Japan.Read More
We discovered a new exploit kit named Capesand in October 2019. Capesand attempts to exploit recent vulnerabilities in Adobe Flash and Microsoft Internet Explorer (IE). Based on our investigation, it also exploits a 2015 vulnerability for IE. It seems the cybercriminals behind the exploit kit are continuously developing it and are reusing source code from a publicly shared exploit kit code.Read More
After almost two years of sporadic restricted activity, the ShadowGate campaign has started delivering cryptocurrency miners with a newly upgraded version of the Greenflash Sundown exploit kit. The campaign has been spotted targeting global victims, after operating mainly in Asia. Background of the Greenflash Sundown exploit kit The ShadowGate (also called WordsJS) campaign was identified…Read More
We discovered a new exploit kit we named Underminer that employs capabilities used by other exploit kits to deter researchers from tracking its activity or reverse engineering the payloads. Underminer delivers a bootkit that infects the system’s boot sectors as well as a cryptocurrency-mining malware named Hidden Mellifera. Underminer transfers malware via an encrypted transmission control protocol (TCP) tunnel and packages malicious files with a customized format similar to ROM file system format (romfs). These make the exploit kits and its payload challenging to analyze.Read More
The exploit kit landscape has been rocky since 2016, and we’ve observed several of the major players—Angler, Nuclear, Neutrino, Sundown—take a dip in operations or go private. New kits have popped up sporadically since then, sometimes revamped from old sources, but none have really gained traction. Despite that fact, cybercriminals continue to develop more of them.