sublimelowRule

Attachment: Any .sap file (unsolicited)

SAP shortcut files can be abused to run unsanctioned code on endpoints. Use if receiving .sap files is not normal behavior in your environment.

MITRE ATT&CK

T1566.001 T1204.002 T1486 T1036 T1027 T1059

defense-evasionexecution

Detection Query

type.inbound
and any(attachments, .file_extension == "sap")
and (
  not profile.by_sender().solicited
  or profile.by_sender().any_messages_malicious_or_spam
)
and not profile.by_sender().any_messages_benign

// negate highly trusted sender domains unless they fail DMARC authentication
and (
  (
    sender.email.domain.root_domain in $high_trust_sender_root_domains
    and not headers.auth_summary.dmarc.pass
  )
  or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

References

https://onapsis.com/blog/sap-shortcut-phishing-threat/

Tags

Attack surface reduction

Raw Content

name: "Attachment: Any .sap file (unsolicited)"
description: "SAP shortcut files can be abused to run unsanctioned code on endpoints. Use if receiving .sap files is not normal behavior in your environment."
references:
  - "https://onapsis.com/blog/sap-shortcut-phishing-threat/"
type: "rule"
severity: "low"
source: |
  type.inbound
  and any(attachments, .file_extension == "sap")
  and (
    not profile.by_sender().solicited
    or profile.by_sender().any_messages_malicious_or_spam
  )
  and not profile.by_sender().any_messages_benign
  
  // negate highly trusted sender domains unless they fail DMARC authentication
  and (
    (
      sender.email.domain.root_domain in $high_trust_sender_root_domains
      and not headers.auth_summary.dmarc.pass
    )
    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
  )
tags:
 - "Attack surface reduction"
attack_types:
  - "Malware/Ransomware"
tactics_and_techniques:
  - "Evasion"
  - "Scripting"
detection_methods:
  - "File analysis"
  - "Header analysis"
  - "Sender analysis"
id: "220ed3de-1b01-54a4-898d-6081785e2870"