sublimemediumRule

Attachment: MS Office or RTF file with Shell.Explorer.1 com object with embedded LNK

Detects embedded Shell.Explorer.1 COM objects containing LNK files within various file types.

MITRE ATT&CK

defense-evasion

Detection Query

type.inbound
and any(attachments,
        (.file_type == "rtf" or .file_extension in $file_extensions_macros)
        and any(file.explode(.),
                any(.scan.yara.matches,
                    strings.starts_with(.name, "ShellExplorer1_LNK_")
                )
        )
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Tags

Attack surface reduction

Raw Content

name: "Attachment: MS Office or RTF file with Shell.Explorer.1 com object with embedded LNK"
description: |
    Detects embedded Shell.Explorer.1 COM objects containing LNK files within various file types.
type: "rule"
severity: "medium"
source: |
  type.inbound
  and any(attachments,
          (.file_type == "rtf" or .file_extension in $file_extensions_macros)
          and any(file.explode(.),
                  any(.scan.yara.matches,
                      strings.starts_with(.name, "ShellExplorer1_LNK_")
                  )
          )
  )
tags:
  - "Attack surface reduction"
attack_types:
  - "Malware/Ransomware"
tactics_and_techniques:
  - "Evasion"
detection_methods:
  - "File analysis"
  - "YARA"
id: "53a29f61-3841-575d-baee-80900a92c679"