""ET INFO Upload to Links-Server File Sharing Server""

SID: 2046809

Revision: 1

Class Type: misc-activity

Metadata: attack_target Client_Endpoint, created_at 2023_07_12, deployment Perimeter, deployment SSLDecrypt, performance_impact Moderate, confidence Low, signature_severity Informational, updated_at 2023_07_12

Reference:

• Link

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "POST"

• Value: "/upload"

• Value: "|0d 0a|Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|expires|22 0d 0a 0d 0a|"

• Value: "|0d 0a 2d 2d 2d 2d 2d 2d 2d 2d|"

• Value: "|0d 0a|Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|access_key|22 0d 0a 0d 0a 0d 0a 2d 2d 2d 2d 2d|"

• Value: "|0d 0a|Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|expires|22 0d 0a 0d 0a|"

Within: 10

PCRE: "/^(?:[0-9]{7})/R"

Special Options:

• http_method

• http_uri

• http_client_body

• http_client_body

• http_client_body

• http_client_body

source