alert dns any any -> $HOME_NET any (msg:"ET MALWARE MalDoc Retrieving msiexec Commands via DNS TXT"; content:"|00 01 00 01 00 00 00 00|"; offset:4; depth:8; content:"|00 10|"; distance:0; content:"msiexec|20 2f|"; within:40; fast_pattern; nocase; reference:md5,029e926243feed488754cd21a69b5528; classtype:trojan-activity; sid:2029607; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_03_11, deployment Perimeter, confidence High, signature_severity Major, updated_at 2020_08_19;)