After several months in decline, Exploit kit infections show sharp uplift and deliver a variety of threats, says Check Point. The Rig EK was the second most-used malware worldwide throughout the period. Both Rig and Terror have been witnessed delivering a wide variety of. threats, from. ransomware and banking Trojans to spambots and BitCoin miners. The most common malware in March were HackerDefender and Rig in first and second place, followed by Conficker and Cryptowall.”]