Versions (3)
Version DetailsCurrent
Rev: 2 • Aug 11, 2017, 12:00 PMET MALWARE Possible AMSI Powershell Bypass Attempt B642
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible AMSI Powershell Bypass Attempt B642"; flow:established,from_server; file_data; content:"<script"; nocase; content:"powershell"; nocase; distance:0; content:"EAbQBzAGkASQBuAGkAdABGAGEAaQBsAGUAZ"; fast_pattern; classtype:trojan-activity; sid:2024535; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_08_11, deployment Perimeter, confidence Medium, signature_severity Major, updated_at 2019_07_26;)
Aug 11, 2017, 12:00 PM
Jul 26, 2019, 12:00 PM
Sep 21, 2024, 3:00 AM
May 30, 2025, 12:04 AM
rules/emerging-malware.rules