ET MALWARE Possible Locky Ransomware Writing Encrypted File over - SMB and SMB-DS v1 ASCII - Suricata Rule 2022638 (et/open)

ET MALWARE Possible Locky Ransomware Writing Encrypted File over - SMB and SMB-DS v1 ASCII

7.0.3 5.0SID: 2022638Rev: 2Enabled2 views

Fileemerging-malware.rules

CreatedMarch 23, 2016

UpdatedMarch 7, 2024

Classificationtrojan-activity

alert tcp $HOME_NET any -> $EXTERNAL_NET [445,139] (msg:"ET MALWARE Possible Locky Ransomware Writing Encrypted File over - SMB and SMB-DS v1 ASCII"; flow:established,to_server; content:"|ff|SMB|a2|"; offset:4; depth:5; byte_test:1,!&,0x80,6,relative; content:".locky|00|"; nocase; distance:0; fast_pattern; classtype:trojan-activity; sid:2022638; rev:2; metadata:attack_target Client_Endpoint, created_at 2016_03_23, deployment Perimeter, confidence Medium, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_07, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)

Metadata

attack targetClient_Endpoint

created at2016_03_23

deploymentPerimeter

confidenceMedium

signature severityMajor

tagDescription_Generated_By_Proofpoint_Nexus

updated at2024_03_07

mitre tactic idTA0040

mitre tactic nameImpact

mitre technique idT1486

mitre technique nameData_Encrypted_for_Impact

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