The provided information describes a malspam campaign identified on August 25, 2017, titled 'New voice message.' Malspam, or malicious spam, typically involves sending unsolicited emails containing malicious attachments or links designed to deliver malware onto the victim's system. In this case, the campaign likely used social engineering tactics by referencing a 'new voice message' to entice recipients to open the email or attachment, exploiting curiosity or urgency. However, the details are minimal, with no specific malware family, infection vector, or payload described. The campaign is classified as malware-related but with a low severity rating and no known exploits in the wild. The absence of affected versions or patch links suggests this is not tied to a specific software vulnerability but rather a generic malware distribution via email. The threat level is marked as 3 (on an unspecified scale), and there is no detailed technical analysis or indicators of compromise provided. Overall, this appears to be a low-severity, opportunistic malspam campaign leveraging social engineering to distribute malware, typical of many email-based threats prevalent in 2017.

For European organizations, the impact of this malspam campaign would primarily depend on the success of the social engineering attempt and the nature of the malware payload, which is unspecified. If successful, it could lead to malware infection resulting in data compromise, system disruption, or unauthorized access. However, given the low severity rating and lack of known exploits, the campaign likely posed a limited threat. European organizations with robust email filtering, user awareness training, and endpoint protection would be less affected. Nonetheless, any malware infection can lead to operational disruption, potential data breaches, and financial loss. The campaign's generic nature means it could target any sector, but organizations with high email volumes or less mature security postures might be more vulnerable.

To mitigate threats from malspam campaigns like 'New voice message,' European organizations should implement advanced email filtering solutions that detect and quarantine suspicious emails based on content and attachment analysis. User awareness training is critical to educate employees about phishing and social engineering tactics, emphasizing caution with unexpected voice message notifications or attachments. Endpoint protection platforms should be kept up to date with the latest malware signatures and behavioral detection capabilities. Network segmentation can limit malware spread if an infection occurs. Additionally, organizations should enforce strict attachment handling policies, such as blocking executable files or sandboxing attachments before delivery. Regular backups and incident response plans will help minimize impact if malware infection occurs. Since no specific malware details are provided, these general best practices are essential to reduce risk from similar malspam campaigns.