The provided information describes a malspam campaign identified on September 1, 2017, titled 'New voice message.' Malspam campaigns typically involve the distribution of malicious emails designed to trick recipients into opening attachments or clicking links that lead to malware infection. In this case, the campaign likely used a social engineering lure referencing a new voice message to entice users to engage with the email content. However, the details are minimal, with no specific malware family, infection vector, or payload described. The threat level is noted as 3 (on an unspecified scale), and the severity is classified as low. There are no known exploits in the wild linked to this campaign, no affected software versions, and no patch information. The lack of technical indicators or detailed analysis limits the ability to fully characterize the malware or its capabilities. Given the nature of malspam, the primary risk is the potential for initial compromise through user interaction, which could lead to malware installation, data theft, or further network infiltration if successful.

For European organizations, the impact of this malspam campaign is likely limited due to its low severity and absence of known exploits. However, malspam remains a common initial attack vector that can lead to more severe consequences if users are deceived. Potential impacts include the compromise of individual endpoints, unauthorized access to sensitive information, and the establishment of footholds for further attacks. Organizations with less mature email filtering and user awareness programs may be more vulnerable. Additionally, sectors with high volumes of voice communications or those that rely heavily on email for operational messages might see a slightly increased risk of users engaging with such lures. Overall, the impact is expected to be localized and manageable with standard security controls.

To mitigate threats from malspam campaigns like 'New voice message,' European organizations should implement layered defenses beyond generic advice: 1) Deploy advanced email filtering solutions that use machine learning and heuristic analysis to detect and quarantine suspicious emails referencing voice messages or similar social engineering themes. 2) Conduct targeted user awareness training focused on recognizing malspam lures related to voice communications and the risks of opening unexpected attachments or links. 3) Implement strict attachment handling policies, including sandboxing and detonation of attachments in isolated environments before delivery. 4) Monitor email gateway logs for patterns consistent with malspam campaigns and establish rapid incident response procedures to isolate affected endpoints. 5) Employ endpoint detection and response (EDR) tools capable of identifying early signs of malware execution stemming from email vectors. 6) Regularly update and patch email clients and associated software to reduce exploitation opportunities, even though no specific patches are noted here.