World's Third Largest Spam Botnet Shut Down: Security-research group FireEye and spam-tracking service SpamHaus worked with ISPs to shut down the Grum spam botnet. The Grum botnet was reportedly responsible for as much as 18 percent of the world's spam, and it was\u00a0thought to be the third-largest spam botnet in operation. The takedown effort began with the removal of two command-and-control servers in the Netherlands by local\u00a0police, who were\u00a0contacted by FireEye researchers.\u00a0 Two\u00a0additional C&C\u00a0servers were also in operation, one in Panama and one in Russia. After the servers in the Netherlands were taken down, the ISP in Panama that owned\u00a0the suspect server responded to pressure from researchers and removed it. The two Dutch servers were replaced with six new servers located in the Ukraine. When the researchers at FireEye learned of this development, they\u00a0passed the information along to others in the security\u00a0community, including Spamhaus and CERT-GIB, the Russian computer emergency response team. Carel Van Straten and Thomas Morrison from Spamhaus and Alex Kuzmin from CERT-GIB reached out to contacts in Russia and the Ukraine, and within a few hours the servers\u00a0were taken\u00a0offline as well. As a result, the number of Grum-infected IP addresses sending spam dropped from roughly 120,000 to 21,000.\n\tDropbox Probes Possible Hack: Dropbox\u00a0hired investigators to find out why some of its European users are receiving spam sent to email addresses associated with their accounts. A note on the cloud-storage service\u2019s user forum says the\u00a0investigators have not\u00a0yet been able to confirm any\u00a0unauthorized activity. Many users\u00a0reported receiving the spam\u00a0via email addresses used only for Dropbox. The spam, written in German, English and Dutch, advertises gambling websites.\n\tWall Street IT Recruiting Service Attacked: Hackers published files containing data on tens of thousands of IT professionals taken from ITWallStreet.com, a\u00a0site that\u00a0focuses on IT professionals who are seeking Wall Street jobs or who work with Wall Street firms. The data was apparently stolen by a hacker who is a member of a group called TeamGhostShell. An inspection of the published data\u00a0by Computerworld\u00a0showed first and last names, mailing addresses, email addresses, usernames, hashed passwords and phone numbers of thousands of people. Many of the thousands of hashed passwords seem to have already been decrypted into their clear text form.\n\tMother Hacks School System 110 Times to Change Kids' Grades: Catherine Venusto, a former secretary at Pennsylvania\u2019s Northwestern Lehigh School District, hacked into the school system's computers and changed her daughter's grade from an F to an M and her son's grade from a 98 to a 99. \u00a0She was charged with three counts each of unlawful use of a computer and computer trespass and released on $30,000 unsecured bail. State police say she admitted changing the grades, and while she agrees her actions were unethical,\u00a0they apparently aren't\u00a0illegal.