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Rev: 4 • Jan 3, 2025, 2:34 PM🐾 - 🚨 Suspicious TCP Keep-Alive ACK from external server - 🥷 Possible QuasarRAT 🪟 C2 activity - TA0011
alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"🐾 - 🚨 Suspicious TCP Keep-Alive ACK from external server - 🥷 Possible QuasarRAT 🪟 C2 activity - TA0011"; flow:to_client, stateless; tcp.flags:A,FSRPUCE; window:8192; reference:url,https://attack.mitre.org/tactics/TA0011/; reference:url,https://malpedia.caad.fkie.fraunhofer.de/details/win.quasar_rat; metadata:attack_target Client_and_Server, signature_severity Major, affected_product Windows_XP_Vista_7_8_10_11_Server_32_64_Bit, mitre_tactic_id TA0011, mitre_tactic_name Command_and_Control, former_category MALWARE, malware_family QuasarRAT, created_at 2025_01_04, updated_at 2025_01_04; sid:3321407; rev:4; classtype:command-and-control; noalert;)
Jan 3, 2025, 2:34 PM
Jan 4, 2025, 12:00 PM
Jan 3, 2025, 2:34 PM
May 29, 2025, 11:12 PM
rules/PAW-PATRULES_MALWARES.rules