""ET TROJAN Possible UPSTYLE Command Attempt""
SID: 2052026
Revision: 1
Class Type: trojan-activity
Metadata: affected_product Palo_Alto_Networks, attack_target Networking_Equipment, tls_state TLSDecrypt, created_at 2024_04_12, deployment Perimeter, deployment SSLDecrypt, malware_family UPSTYLE, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2024_04_12
Reference:
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: $HTTP_PORTS
Destination Network: $HOME_NET
Destination Port: any
Flow: established,to_server
Contents:
-
Value: "GET"
-
Value: "img|5b|"
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Value: !"|0d 0a|Referer|0d 0a|"
Within:
PCRE: "/img\x5b[a-zA-Z0-9+/=]{10,}\x5d/U"
Special Options:
-
http_method
-
http_uri
-
fast_pattern
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http_uri