Surge in ZLoader Attacks Observed

Surge in ZLoader Attacks Observed
PhishLabs has observed a spike in malicious emails distributing ZLoader malware. The spike is notably one of the greatest upticks for a single payload observed in a 24-hour period over the past year, and is the first significant sign that another botnet may be stepping up in the aftermath of the
Emotet takedown
 
ZLoaderbydate
May 2020 – February 2021 ZLoader Activity
 
Z
Loader is one of the most frequently reported malware strains since June 2020. This particular
campaign uses three legitimate file sharing platforms to distribute attacks: WeTransfer, Google Docs, and box.com. Emails are delivered through a variety of compromised accounts. The payload is delivered via malicious files and download links. 
 
>> Learn More About Ransomware Threats <<
 

WeTransfer Example

WeTransfer Sender Address: noreply@wetransfer.com
 
WeTransfer Subject Line: <compromised_email_address@compromisedDomain.com> sent you files via WeTransfer
 
WeTransfer URL:
hxxps://wetransfer[.]com/downloads/52d55eeb42591d9ebbffe5326326858320210218183005/8b80cbbd9c1b8f7695b8de69e995ebee20210218183005/8c0cd5?utm_campaign=WT_email_tracking&utm_content=general&utm_medium=download_button&utm_source=notify_recipient_email
 
WeTransfer Phishing Lure
 

Additional Lures

boxlure copyBox.com Phishing Lure
 
googledoclure copy-3
Google Docs Phishing Lure
 
ZLoader is a popular banking trojan often purchased for distribution by threat actors through Malware-as-a-Service (MaaS). It commonly acts as a dropper to deliver Zeus-based malware in multistage ransomware attacks. 
 
ZLoader is delivered through email phishing and most often linked with Ryuk and Egregor ransomware strains. Recently, multiple individuals
tied to Egregor
have been arrested and it remains to be seen whether or not this will have an effect on ZLoader volume.  

Learn about how PhishLabs helps organizations defend against ransomware risks with
Ransomware Protection.
 
Additional Resources:

*** This is a Security Bloggers Network syndicated blog from The PhishLabs Blog authored by Jessica Ellis. Read the original post at: https://info.phishlabs.com/blog/surge-in-zloader-attacks-observed