""ET ATTACK_RESPONSE Possible WebShell Upload Attempt via Directory Traversal M1""

SID: 2038637

Revision: 1

Class Type: attempted-admin

Metadata: attack_target Server, created_at 2022_08_29, deployment Perimeter, deployment Internal, signature_severity Major, tag Exploit, updated_at 2022_08_29, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application

Reference:

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: [$HOME_NET,$HTTP_SERVERS]

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

• Value: "POST"

• Value: "./"

• Value: "filename=|22|"

Within:

PCRE: "/filename=\x22[^\x22]+(.{1,2}\/)+(\w+\/?)+.(jsp|aspx?|php)\x22/P"

Special Options:

• http_method

• http_client_body

• http_client_body

• fast_pattern

source