After the analysis incidents of more than 6000 companies, Security Analytics firm BitSight has suggested that organisations showing evidence of botnets inside their networks are not only more likely to suffer a data breach, the level of botnet activity correlates directly to increased risks. The firm spent the year up to March 2015 looking at the security ratings it had handed out to 6,273 mostly US-based firms of 1,000 employees and larger using a range of worrying security symptoms to calculate grades from A (best) to F (worst). In total, 199 (3.3 percent) had suffered a disclosed data breach. The 1,536 organisations with the lowest grade of botnet activity (grade A) turned out to have suffered breaches on 26 occasions (1.7 percent of the total) while the 4,536 organisations showing higher levels of botnets (grade B) had suffered breaches on 172 occasions. Although not a massive difference in absolute terms, the figures suggest that firms with higher botnet activity were on the basis of this sample 2.2 times more likely to have suffered a data breach, a statistically significant contrast.
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