alert smtp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET SCAN StarDotStar? HELO, suspected AUTH LOGIN botnet"; flow:established,to_server; content:"HELO|20 2a 2e 2a 0d 0a|"; depth:11; metadata: former_category CURRENT_EVENTS; classtype:bad-unknown; sid:2026463; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, deployment Perimeter, signature_severity Major, created_at 2018_10_09, updated_at 2018_10_12;)

Added 2018-10-12 18:07:30 UTC


alert smtp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET CURRENT_EVENTS StarDotStar? HELO, suspected AUTH LOGIN botnet"; flow:established,to_server; content:"HELO|20 2a 2e 2a 0d 0a|"; depth:11; metadata: former_category CURRENT_EVENTS; classtype:bad-unknown; sid:2026463; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, deployment Perimeter, signature_severity Major, created_at 2018_10_09, updated_at 2018_10_09;)

Added 2018-10-09 18:08:44 UTC

LArge number of FPs. If it's possible to inspect the responses, responses of "535 Invalid Username or Password" or "530 A SSL/TLS-connection is required for authentication." can be ignored

-- JakeQuirke - 2018-10-12

In addition, it would be useful to include a reference to the source intel for this IoC?

-- JakeQuirke - 2018-10-12


Topic revision: r2 - 2018-10-12 - JakeQuirke
 
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