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QBot Trojan delivered via malspam campaign exploiting US election uncertainties

This blog post was authored by Jérôme Segura and Hossein Jazi. The 2020 US elections have been the subject of intense scrutiny and emotions, while happening in the middle of a global pandemic. As election night ended and uncertainty regarding the results began to creep in, threat actors decided to jump in on it too. Those tracking the threat landscape know very well that major world events … [Read more...]

Malspam campaign caught using GuLoader after service relaunch

They say any publicity is good publicity. But perhaps this isn’t true for CloudEye, an Italian firm that claims to provide “the next generation of Windows executables’ protection”. First described by Proofpoint security researchers in March 2020, GuLoader is a downloader used by threat actors to distribute malware on a large scale. In June, CloudEye was exposed by … [Read more...]

Cybercriminals impersonate World Health Organization to distribute fake coronavirus e-book

The number of scams, threats, and malware campaigns taking advantage of public concern over the coronavirus is increasing each day. As a result, we’ve been actively monitoring emails within our spam honeypot to flag such threats and make sure our users are protected. Yesterday, we observed a phishing campaign similar to malspam previously discovered by MalwareHunterTeam, which … [Read more...]

Spear phishing 101: what you need to know

Phishing, a cyberattack method as old as viruses and Nigerian Princes, continues to be one of the most popular means of initiating a breach against individuals and organizations, even in 2020. The tactic is so effective, it has spawned a multitude of sub-methods, including smishing (phishing via SMS), pharming, and the technique du jour for this blog: spear phishing. But first, a quick parable. A … [Read more...]

Instagram clamps down on fake messages with anti-phishing tool

Instagram accounts will always be a popular target for scammers. You might not think it’s a big deal if someone has their account swiped, but it’s often the vanguard of many online businesses. A takeover, or a deletion, can be absolutely devastating. Smart hacking crews are always in the background, waiting to see what they can get away with—and it’s not just the public-facing account at risk, but … [Read more...]

Emotet malspam campaign uses Snowden’s new book as lure

Exactly one week ago, Emotet, one of the most dangerous threats to organizations in the last year, resumed its malicious spam campaigns after several months of inactivity. Based on our telemetry, we can see that the botnet started becoming chatty with its command and control servers (C2), about a week or so before the spam came through. Figure 1: Communications with Emotet C2s over 90 … [Read more...]

Emotet is back: botnet springs back to life with new spam campaign

After a fairly long hiatus that lasted nearly four months, Emotet is back with an active spam distribution campaign. For a few weeks, there were signs that the botnet was setting its gears in motion again, as we observed command and control (C2) server activity. But this morning, the Trojan started pumping out spam, a clear indication it’s ready to jump back into action. The malicious … [Read more...]

Ryuk ransomware attacks businesses over the holidays

While families gathered for food and merriment on Christmas Eve, most businesses slumbered. Nothing was stirring, not even a mouse—or so they thought. For those at Tribune Publishing and Data Resolution, however, a silent attack was slowly spreading through their networks, encrypting data and halting operations. And this attack was from a fairly new ransomware family called Ryuk. Ryuk, which made … [Read more...]

What’s in the spam mailbox this week?

We’ve seen a fair few spam emails in circulation this week, ranging from phishing to money muling to sexploitation. Shall we take a look? The FBI wants to give you back your money First out of the gate, we have a missive claiming to be from the FBI. Turns out you lost a huge sum of money that you somehow don’t have any recollection of, and now the FBI wants to give it back to you via … [Read more...]

Five easy ways to recognize and dispose of malicious emails

I suppose we all get our share of spam. Some more than others. But how do we differentiate between simple commercial spam and the types of emails that want to get us in trouble? The unsolicited commercial spam email is generally easy to recognize, report, and discard, but what about more dangerous types of spam? How can you determine if an email contains a malicious link or attachment, or is … [Read more...]