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Bitdefender
Bitdefender - BDTS updates
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<blockquote data-quote="SeriousHoax" data-source="post: 1095477" data-attributes="member: 78686"><p>For example, this is the sha256 hash of a notepad file that I just created on my desktop and wrote random letters in it:</p><p>58DD157109F5A119C9C71BF2D2921E052D4A94A401FC8061E603933CFFCED4FF</p><p>When I slightly changed the file by typing one more letter, the hash changed to:</p><p>698D34FB74F3EEED09BFB12B031548EE74177D90FD77536A5B123F67BB92CE91</p><p>If an AV vendor create a signature that looks for one particular hash only then even a tiny change in the file will make it not detect anymore.</p><p>There is also fuzzy hash which is different. Slight modification doesn't change fuzzy hash. SSDEEP, TLSH are two such examples.</p></blockquote><p></p>
[QUOTE="SeriousHoax, post: 1095477, member: 78686"] For example, this is the sha256 hash of a notepad file that I just created on my desktop and wrote random letters in it: 58DD157109F5A119C9C71BF2D2921E052D4A94A401FC8061E603933CFFCED4FF When I slightly changed the file by typing one more letter, the hash changed to: 698D34FB74F3EEED09BFB12B031548EE74177D90FD77536A5B123F67BB92CE91 If an AV vendor create a signature that looks for one particular hash only then even a tiny change in the file will make it not detect anymore. There is also fuzzy hash which is different. Slight modification doesn't change fuzzy hash. SSDEEP, TLSH are two such examples. [/QUOTE]
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