DCN June 2016 - Page 35

automation tools to resolve an attack after it has been discovered? Ponemon Institute’s 2015 Cost of Cyber Crime Study: Global reported a median resolution time of an additional 46 days! So while it’s a good idea to store all of your network’s traffic for that time when you need to conduct an investigation, the sheer volume of the storage required makes it impractical and prohibitive for all by the biggest of companies. Needle in a haystack But let’s assume for argument’s sake that you are able to store all of your network data. Even then, a post-breach forensics investigation can be challenging because it is still like looking for a needle in a huge haystack; blindly searching through petabytes of stored information is unlikely to be successful in itself. So the best alternative lies somewhere in the middle. Finding ways to reduce the size of that haystack to a more manageable scale by collecting as many clues as possible to narrow down the investigation. One important source of clues is derived from the alerts generated by your network’s monitoring tools, such as intrusion detection (IDS) systems, authentication failures or unauthorised server acces ̸́]ݕ)Ʌ́ɕٕЁԁɽ)хٕѥѥѡ͔)́ɕѥͥѡ)݅Ѽ͕Ёݽɬ(Фф́ԁɽ)ݸѡ͕ɍٕեݡ)х͍ٕ́ɕMՑ)ٔ͡ݸѡЁЁх́<)ɥȁЁЁͽ́ɽѡ)ѕɥ͗éѽɥѕ̰)ѡ՝ѡ䁵䁡ٔѥ)ٕɱ!ݕٕȰݡɕ)́ɵɕᅵѥ̃L)ѡͽѕٕ̃ͅL)ɅЁݡ)Յ䁡)]ЁԁЁɽ)ݽɬɕͥ́ͽѥɽ)ɕ͕ɥѥٔ$ѡ)ѡɔɔݼ䁉(QɅͅѥ̸ͥ9ݽɬ)ɕͥ́ͽѥ́ɽ٥)ѡaձѥєՑЁɅdȁ)́Ʌͅѥ̰Ց)ɍ])͕ٕȁ́ѡȁ͕ٕ)͕٥́Ёɽ٥)ՙЁфȁɅѕɥͥ)Ʌͅѥݽɬɕͥ)́%Pѕ́Ѽє)ᅵѡᅍЁѕЁ)ᕍѥɅͅѥ((ɥ䁅х̸ͥQɔ)L)ɔѡȁѽ́ѡЁəɴ)ɭɽՉ͡ѥ)Ё䁄Քɕͥ́ͽѥ)͕́ɥ䁽́%Pх)ѼɅѕɥ͔ѥє)хѡЁͱЁݽɬ)̸͕9ݽɬɕͥ)ٕ́ѥѽ́Ѽɽ)хѼɅ́)%Pɕͽɍ̸+ )ɕͽ٥ɕ)́х䁄չѥɽЁ)ѕɥ͔ͥ锰Ёѡ)х݅䁙ɽѡ͍́ͥ͡ձ)ѡЁѥݽɭ܁)Ѽѕѱѽɔ䁡ѽɥ)ɵѥĹͽѕ)́aϊd̃Lѡ)ѕɥ͔ݥɕɕѼɅ)ɕєѡх()5䁑фٕ͕հѡх)́ѥɕ͕Ёȁѕ̰Ёѡ䁅ɔ)ѕѡ䁕Ʌ͕((((