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Cofense Phishing Prevention & Email Security Blog

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Remote Access Trojan Uses Sendgrid to Slip through Proofpoint

August 14, 2019 by Marcel Feller in Phishing Defense CenterProofpointSEG Misses

The CofenseTM Phishing Defense CenterTM observed a malware campaign masquerading as an email complaint from the Better Business Bureau to deliver the notorious Orcus RAT, part of the free DNS domain ChickenKiller which we blogged about in 2015. Here’s how it works:

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This Phishing Attacker Takes American Express—and Victims’ Credentials

July 16, 2019 by Milo Salvia in Phishing Defense CenterInternet Security AwarenessMicrosoft 365 ATP

Recently, the CofenseTM Phishing Defense CenterTM observed a phishing attack against American Express customers, both merchant and corporate card holders. Seeking to harvest account credentials, the phishing emails use a relatively new exploit to bypass conventional email gateway URL filtering services.

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Houdini Worm Transformed in New Phishing Attack

June 14, 2019 by Cofense in Threat IntelligencePhishing Defense CenterSEG MissesSymantec

By Nick Guarino and Aaron Riley The Cofense Phishing Defense Center™ (PDC)  and Cofense Intelligence™ have identified a new variant of Houdini Worm targeting commercial banking customers with campaigns containing either URLs, .zip, or .mht files. This new variant is named WSH Remote Access Tool (RAT) by the malware’s author and was released on June 2, 2019. Within five days, WSH RAT was observed being actively distributed via phishing. Figure 1 shows an example message from this campaign.

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The Zombie Phish Is Back with a Vengeance

June 4, 2019 by Milo Salvia in Phishing Defense CenterSEG MissesSymantec

Keep a close on your inboxes—the Zombie Phish is back and it’s hitting hard. Last October, on the eve of Halloween, the CofenseTM Phishing Defense CenterTM reported on a new phishing threat dubbed the Zombie Phish. This phish spreads much like a traditional worm. Once a mailbox’s credentials have been compromised, the bot will reply to long-dead emails (hence, Zombie) in the inbox of the infected account, sending a generic phishing email intended to harvest more victims for the Zombie hoard.

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