sublimemediumRule

Service abuse: Behance document sharing with suspicious language

Detects messages containing document sharing language with a single Behance gallery link, potentially indicating abuse of the legitimate Adobe Behance platform for malicious purposes.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598

initial-access

Detection Query

type.inbound
and length(body.current_thread.text) < 10000
and strings.ilike(body.current_thread.text,
                  "*proposal*",
                  "*specified link*",
                  "*secure*"
)
and length(filter(body.current_thread.links,
                  .href_url.domain.root_domain == 'behance.net'
                  and strings.icontains(.href_url.path, '/gallery/')
                  and .display_url.domain.root_domain == 'behance.net'
                  and strings.icontains(.display_url.path, '/gallery/')
           )
) == 1
and not (
  sender.email.domain.root_domain in $high_trust_sender_root_domains
  and coalesce(headers.auth_summary.dmarc.pass, false)
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Service abuse: Behance document sharing with suspicious language"
description: "Detects messages containing document sharing language with a single Behance gallery link, potentially indicating abuse of the legitimate Adobe Behance platform for malicious purposes."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and length(body.current_thread.text) < 10000
  and strings.ilike(body.current_thread.text,
                    "*proposal*",
                    "*specified link*",
                    "*secure*"
  )
  and length(filter(body.current_thread.links,
                    .href_url.domain.root_domain == 'behance.net'
                    and strings.icontains(.href_url.path, '/gallery/')
                    and .display_url.domain.root_domain == 'behance.net'
                    and strings.icontains(.display_url.path, '/gallery/')
             )
  ) == 1
  and not (
    sender.email.domain.root_domain in $high_trust_sender_root_domains
    and coalesce(headers.auth_summary.dmarc.pass, false)
  )
attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "Free file host"
  - "Social engineering"
detection_methods:
  - "Content analysis"
  - "URL analysis"
id: "7cd9666f-29fc-5390-9053-08537ef83051"