A new version of the Python-based NodeStealer malware is actively targeting Facebook Ads Manager accounts, expanding its scope to steal valuable credit card data stored in web browsers. Initially identified as JavaScript malware, NodeStealer has undergone significant evolution, now utilizing Python to gather sensitive information from Facebook accounts and facilitating their takeover. According to Netskope Threat Labs, the malware exploits stolen cookies from the victim’s machine to generate access tokens via the Facebook Graph API. This access allows attackers to not only steal business-related data but also target credit card details for further exploitation. The malware’s focus on Facebook business accounts highlights its potential for both financial fraud and broader cybercriminal operations.
One of the key features of the updated NodeStealer is its ability to unlock and access browser databases using a legitimate Windows tool, the Restart Manager. This technique enables the malware to extract credit card data stored in the victim’s browser, a method that increases its ability to steal sensitive financial information. The malware also includes an additional safeguard—avoiding infection on machines located in Vietnam, likely to evade law enforcement. This tactic points to the malware’s origins in Vietnam and the sophisticated strategies employed to minimize detection and increase its success rate.
Once the malware has infiltrated the victim’s system, it is able to use the compromised Facebook Ads Manager accounts for malvertising campaigns. This is an especially lucrative attack vector, as cybercriminals can utilize hijacked accounts to promote malicious software under the guise of legitimate ads, further spreading the malware. These malicious ads are commonly used to distribute more harmful infections, leveraging Facebook’s trust to dupe users into downloading unwanted applications. Researchers have also found that NodeStealer samples exfiltrate data using Telegram, which continues to be a popular tool among cybercriminals due to its encrypted messaging capabilities.
The growing capabilities of NodeStealer underscore the evolving nature of cyber threats targeting social media platforms like Facebook. As businesses and individuals rely more on platforms for advertising, the risks posed by these types of malware attacks are becoming more severe. Malvertising campaigns that originate from compromised accounts can lead to substantial financial losses and long-term reputational damage for victims. The malware’s use of Telegram for data exfiltration and its ability to bypass traditional security measures make it a particularly challenging threat for both individuals and organizations to mitigate.
