By Dancho Danchev
Cybercriminals are currently mass mailing millions of emails impersonating The United States Postal Service (USPS), in an attempt to trick its customers into downloading and executing the malicious .zip archive linked in the bogus emails.
Upon execution, the malware opens a backdoor on the affected host, allowing the cybercriminals behind the campaign to gain complete control over the host.
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By Dancho Danchev
Cybercriminals are currently spamvertising millions of emails impersonating the United States Postal Service (USPS), in an attempt to trick end and corporate users into downloading and unpacking the malicious .zip attachment distributed by them.
What’s so special about this campaign? Where is the malicious sample phoning back to? Are there more malware samples that also phoned back to the same command control servers in the past? Let’s find out.
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By Dancho Danchev
Cybercriminals are currently spamvertising malicious USPS-themed emails, that entice end and corporate users into clicking on malicious links found in the emails.
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By Andrew Brandt
After a prolonged absence, waves of Trojans distributed as Zipped email attachments have been showing up in our spam traps for a few weeks. The spam messages employ the same hackneyed shipping confirmation pretext as many previous iterations of this scam. This technique’s emergence as a common malware distribution method correlates with the emergence of Trojan-Downloader-Tacticlol.
The messages claim to come from various express shippers, including DHL, UPS, and FedEx, as well as one that may have originated in a malware guy’s imagination: Post Express. And even though the distribution method mimics those used by Tacticlol, the payloads haven’t been limited to that Trojan. This time around, the files belong to a wider variety of malware, including not only several new variants of Tacticlol but also Trojan-Downloader-Karagany, Trojan-Relayer-Highport, and SpyEye.
The Trojans’ icons look like Office documents or Acrobat PDFs, which serve to further convince victims that the file isn’t dangerous. The email attachments — Zip files with names such as tracking.zip, Post_Express_Label.zip or DHL_tracking.zip — aren’t dangerous unless you open the attachment, extract the Trojan, and execute it. But once you do, you’re in for a world of trouble.
