Cybersecurity researchers have discovered an intricate multi-stage attack that leverages invoice-themed phishing decoys to deliver a wide range of malware such as Venom RAT, Remcos RAT, XWorm, NanoCore RAT, and a stealer that targets crypto wallets.

The email messages come with Scalable Vector Graphics (SVG) file attachments that, when clicked, activate the infection sequence, Fortinet FortiGuard Labs said in a technical report.

The modus operandi is notable for the use of the BatCloak malware obfuscation engine and ScrubCrypt to deliver the malware in the form of obfuscated batch scripts.