sublimehighRule

PDF attachment with Google (AE) redirecting to a php or zip file

Detects a PDF attachment with a link that contains a Google.ae redirect URL.

MITRE ATT&CK

Detection Query

type.inbound
and any(attachments,
        .file_type == "pdf"
        and any(file.explode(.),
                any(.scan.pdf.urls,
                    // url encoded q=http
                    strings.starts_with(.query_params, "q=%68%74%74%70")
                    // url encoded .php or .zip
                    and (
                      strings.contains(.query_params, ".%70%68%70")
                      or strings.contains(.query_params, "%2e%7a%69%70")
                    )
                    and .domain.root_domain == "google.ae"
                )
        )
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

References

Tags

Malfam: QakBot

Raw Content

name: "PDF attachment with Google (AE) redirecting to a php or zip file"
description: "Detects a PDF attachment with a link that contains a Google.ae redirect URL."
references:
  - "https://twitter.com/Cryptolaemus1/status/1649200761610571776?s=20"
  - "https://analyzer.sublime.security?id=142822c9-8195-47bd-96e3-b8a26267c03c"
type: "rule"
severity: "high"
source: |
  type.inbound
  and any(attachments,
          .file_type == "pdf"
          and any(file.explode(.),
                  any(.scan.pdf.urls,
                      // url encoded q=http
                      strings.starts_with(.query_params, "q=%68%74%74%70")
                      // url encoded .php or .zip
                      and (
                        strings.contains(.query_params, ".%70%68%70")
                        or strings.contains(.query_params, "%2e%7a%69%70")
                      )
                      and .domain.root_domain == "google.ae"
                  )
          )
  )
tags:
  - "Malfam: QakBot"
attack_types:
  - "Malware/Ransomware"
tactics_and_techniques:
  - "Open redirect"
  - "PDF"
detection_methods:
  - "Content analysis"
  - "File analysis"
  - "URL analysis"
id: "57ae513f-54b6-5ddd-9527-449a6d2a23c3"