ET DELETED Suspicious Zipped Filename in Outbound POST Request (Steam_htmlcache.txt) M2
Sourceet/open
CreatedJune 22, 2022
UpdatedJune 23, 2022
Classificationtrojan-activity
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Suspicious Zipped Filename in Outbound POST Request (Steam_htmlcache.txt) M2"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name="; content:".zip|22 0d 0a|"; within:150; content:"|0d 0a|PK|03 04|"; distance:0; byte_test:1,<=,20,0,relative; content:"Steam_htmlcache.txt"; distance:0; nocase; fast_pattern; classtype:trojan-activity; sid:2037092; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_06_22, deployment Perimeter, deprecation_reason Duplicate, performance_impact Low, signature_severity Major, tag Stealer, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_23;)
Metadata
attack targetClient_Endpoint
created at2022_06_22
deploymentPerimeter
deprecation reasonDuplicate
performance impactLow
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2022_06_23
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