alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET TROJAN Possible Covenant Framework Grunt PowerShell? Stager HTTP Download"; flow:established,to_client; file_data; content:"IO.Compression.CompressionMode]|3a 3a|Decompress"; content:".Value.Write("; distance:0; content:"Reflection.Assembly]|3a 3a|Load("; fast_pattern; distance:0; content:".EntryPoint.Invoke("; distance:0; content:"Out-Null"; distance:0; reference:url,github.com/cobbr/Covenant; reference:url,posts.specterops.io/entering-a-covenant-net-command-and-control-e11038bcf462; classtype:trojan-activity; sid:2027797; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, deployment Perimeter, signature_severity Major, created_at 2019_08_04, updated_at 2019_08_04;)

Added 2019-08-05 18:56:08 UTC


Topic revision: r1 - 2019-08-05 - TWikiGuest
 
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