ET MALWARE TA399/Sidewinder Activity Payload Request M1, Microsoft Outlook UA Request for .rtf
Sourceet/open
CreatedAugust 8, 2024
UpdatedSeptember 26, 2024
Classificationcommand-and-control
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA399/Sidewinder Activity Payload Request M1, Microsoft Outlook UA Request for .rtf"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"|2e|rtf"; endswith; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; nocase; http.user_agent; content:"Mozilla|2f|4|2e|0|20 28|compatible|3b 20|MSIE|20|7|2e|0|3b 20|Windows|20|NT"; startswith; content:"ms|2d|office|3b 20|MSOffice"; distance:0; fast_pattern; classtype:command-and-control; sid:2055081; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_08_08, deployment Perimeter, deployment SSLDecrypt, former_category INFO, confidence Medium, signature_severity Major, tag TA399, updated_at 2024_09_26;)
Metadata
affected productWindows_XP_Vista_7_8_10_Server_32_64_Bit
attack targetClient_Endpoint
tls stateTLSDecrypt
created at2024_08_08
deploymentSSLDecrypt
former categoryINFO
confidenceMedium
signature severityMajor
tagTA399
updated at2024_09_26
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