Serpent Cloud Spreads Malware via Phishing
Serpent Cloud, a new campaign, delivers malware using Cloudflare Tunnels. It targets users with phishing emails since recent months. For example, it infects systems in the U.S., U.K., and Europe. This stealthy attack poses a growing threat to online security.
How the Attack Starts
Phishing emails send zipped documents with disguised LNK files. Users open these, thinking they’re safe PDFs. Additionally, the files trigger a multi-step infection process. Consequently, attackers gain access to victim systems.
Malware Delivery Tactics
The chain uses Python loaders and Donut-packed payloads. It executes malware like AsyncRAT in memory. For instance, Cloudflare subdomains host malicious WSF and batch files. As a result, it evades traditional detection methods.
Evolution of the Threat
Serpent Cloud shifts from URL to LNK files for access. It adds obfuscation and extra stages for stealth. A report suggests it may link to past campaigns with modern tweaks. Therefore, its tactics adapt over time.
Global Reach and Impact
The campaign hits regions across Europe and Asia. It targets businesses with English-fluent attackers. Moreover, it uses TryCloudflare for encrypted C2 communication. This complicates efforts to block malicious activity.
Advantages of Cloudflare Abuse
Attackers hide behind legitimate cloud services. They avoid domain registration and VPS costs. For example, temporary subdomains mask their intent. As a result, defenders struggle to spot harmful traffic.
Broader Malware Trends
Similar campaigns like Shadow Vector use SVG files in phishing. They deliver AsyncRAT and Katz Stealer via public platforms. Additionally, memory-resident loaders leave minimal traces. This shows a rise in sophisticated attacks.
Preventing Serpent Cloud Attacks
To stop Serpent Cloud, avoid opening unknown email attachments. For example, verify sender details before clicking. Use updated antivirus software to detect malware and block Cloudflare Tunnel traffic. Additionally, train staff on phishing signs. These steps help protect against malware infections.
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