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How the EITest Campaign's Path to Angler EK Evolved Over Time
Unit 42 documents how the EITest campaign's gate URLs and infrastructure evolved since 2014 while still routing victims to Angler EK and diverse malware.
Unit 42 traced network traffic changes in the EITest campaign, which Malwarebytes identified in October 2014 across thousands of compromised websites. The campaign's injected script patterns have remained consistent, but its gate URLs changed repeatedly, and since January 2016 gates used the 85.93.0.0/24 IP block, often with .tk domains. The gate returns a Flash file that redirects victims to Angler EK, which delivered malware including Vawtrak, Tinba, TeslaCrypt, Bedep, Kovter, Ursnif, and Zeus variants from 2014 through 2016.
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Adobe issued Out-of-Band Flash Update for CVE-2014
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EITest Campaign Evolution: From Angler EK to Neutrino and Rig
Unit 42 details the EITest campaign's shift from Angler to Neutrino and Rig exploit kits while distributing ransomware, downloaders, and banking trojans.
Unit 42 updated its tracking of the EITest campaign, first identified in October 2014, which compromises websites with injected scripts that redirect victims through a gate to exploit kits. After Angler EK disappeared in June 2016, EITest switched to Neutrino and then primarily used Rig EK by August 2016. In September 2016 the campaign began using hex-obfuscated JavaScript and simplified gate URLs, while continuing to distribute payloads including Gootkit, Cerber, Bart, CryptFile2, Vawtrak, Ursnif, and Tinba. Gate infrastructure consistently reused IP blocks such as 85.93.0.0/24 even as domain names changed.
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Campaign Evolution: pseudo
Unit 42 traces the pseudo-Darkleech campaign's 2016 shift from Angler to Neutrino to Rig exploit kits and rotating ransomware payloads.
Unit 42 documents how the pseudo-Darkleech exploit kit campaign evolved through 2016, switching from Angler EK to Neutrino EK in June and to Rig EK in September after Neutrino ceased operations. Payloads rotated from TeslaCrypt to CryptXXX, CrypMIC, and finally Cerber ransomware by October 2016. Injected script on compromised websites changed from 12,000-18,000 character obfuscated blocks to short, unobfuscated hidden iframes starting July 1, 2016.
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