Conficker

Conficker, also known as Kido, Downadup, and Downup, is a malicious software (malware) that emerged in November 2008. This worm rapidly spread across computer networks, exfiltrating sensitive information such as login credentials and personal data. It exploited the MS08-067 vulnerability to initially infect hosts, affecting human machine interfaces (HMIs), which transmitted network traffic and alerted security staff of the infection. Notable instances of its deployment, like the ILOVEYOU virus and Conficker worm, demonstrated the devastating consequences of online criminal activities. One of the most infamous cases occurred when Conficker infected millions of computers worldwide in 2008. Despite being an older malware strain, documented cases of Conficker infecting Operational Technology (OT) networks exist, causing costly destruction and potential safety issues. For instance, JBS saw a massive number of malware infections, including Conficker, over a year, with slow remediation efforts. Both WannaCry and Conficker are known to exploit Server Message Block (SMB), highlighting the importance of reducing SMB attack surfaces. While many OT environments run obsolete software and network topographies, providing an ideal environment for even simple malware like Conficker, measures can be taken to defend against these threats. However, the effectiveness of these measures may vary depending on the specific network architecture. Interestingly, in some cases, Conficker's presence in OT environments has not led to operational damage or product quality degradation. Still, given its potential for harm, ongoing vigilance and proactive defense measures remain essential.