Malware User Agent Detection
Detects suspicious user agent strings commonly used by various malware families and Remote Access Trojans (RATs) in proxy logs. This rule identifies specific user-agent patterns associated with known threats like DragonOK, PlugX, HTTPBrowser RAT, njRAT, ZeroAccess, Dyre, Upatre, Ghost419, W32/Renos.Downloader, Kazy, Sality, Fareit, Toby web shell, Loki Bot, Pony, MacControl malware, Zebrocy, Ursnif, Emotet, Lockbit, Quasar RAT, Havana, AntSword, Racoon Stealer, AresLoader, Lilith Stealer, SVC Loader, WSHRAT, Zerobot, Nymaim, DarkCloud, BunnyStealer, SparkRAT, B4B3RAT, and Latrodectus loader.
Sigma
