""ET TROJAN ASPXSPY Webshell Login Attempt""

SID: 2046744

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Microsoft_IIS, attack_target Web_Server, created_at 2023_07_06, deployment Perimeter, deployment Internal, deployment SSLDecrypt, malware_family ASPXSPY, performance_impact Low, confidence High, signature_severity Major, tag WebShell, updated_at 2023_07_06

Reference:

  • md5

  • 2ef7bb0d9763cf38977182d65173d1b0

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: ".aspx"

  • Value: "|5f 5f|EVENTTARGET|3d 26 5f 5f|FILE|3d|" Depth: 22

  • Value: "HRJ|3d|"

  • Value: "|26|ZSnXu=Login"

Within:

PCRE: "/.aspx$/U"

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • http_client_body

  • http_client_body

  • fast_pattern

source