Threat actors have been distributing the Mars Stealer info-stealing malware through a phony website spoofing the widely-used decentralized wallet and cryptocurrency exchange portal Atomic Wallet, reports BleepingComputer.
Detection evasion measures have been implemented in the ongoing Mars Stealer campaign, which involves a ZIP file with the AtomicWallet-Setup.bat batch file prompting privilege escalation through a PowerShell command, a report from Cyble showed. The PowerShell executable is then copied, renamed, and hidden in the directory prior to the execution of a base64-encoded PowerShell content.
Researchers also found that the final PowerShell code serving as the malware loader facilitates the download of a Mars Stealer copy from a Discord server before deployment on targeted machines.
While the fake website was not an accurate replication of the legitimate Atomic Wallet site, its usage of official logos, marketing images, themes, and structure, as well as a contact form, FAQ section, and email address may deceive individuals who are unaware of the real site, according to the report.
Threat actors behind the campaign, which has a robust command-and-control infrastructure and extensively obfuscated PowerShell stagers, commence the attack with phishing emails sent to their targets' employees, with the messages including a ZIP attachment with a shortcut file that facilitates PowerShell script execution for malware deployment, according to a report from Securonix.