... with the exception of DDoS attacks, do not consume significant computing and communication capacity, much of spam is still based on the economics of large numbers and generates non-negligible ... presentation of material, including maps, do not imply the expression of any opinion whatsoever on the part of ITU concerning the legal status of any country, territory, city or area, or concerning ... however, the degrees of specialization, and the differentiation of roles are in continuous flux. Figure 2. Division of labor in the malware underground economy Visibility of malware vs. malicious...