alert tcp $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET MALWARE TA457 Backdoor CnC Activity"; flow:established,to_server; content:"|23|2"; startswith; content:"0000|7c|auto|7c|1|23|"; distance:1; within:13; fast_pattern; content:"|23|"; endswith; reference:url,twitter.com/RedDrip7/status/1537389704374431744; reference:md5,29b6b195cf0671901b75b7d2ac6814f6; classtype:command-and-control; sid:2037019; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_16, deployment Perimeter, malware_family TA457, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_29;)