Salesforce infrastructure abuse

type.inbound

// we look at the return-path because many times in the abuse
// we've seen, the From is a custom domain
and headers.return_path.domain.root_domain == "salesforce.com"
and length(attachments) == 0
// there are external links (not org or SF domains)
and length(filter(body.links,
                  .href_url.domain.domain not in $org_domains
                  and .href_url.domain.root_domain not in (
                    "salesforce.com",
                    "force.com",
                    "site.com", // salesforce CRM
                    "agentforce.com"
                  )
           )
) > 0
and (
  (
    any(ml.nlu_classifier(body.current_thread.text).intents,
        .name == "cred_theft" and .confidence == "high"
    )
    and ml.nlu_classifier(body.current_thread.text).language == "english"
  )
  // subject match when cred_theft doesn't match
  // high confidence observed subject intros in the format of "Urgent Thing: ..."
  or regex.icontains(subject.subject,
                     '^(?:(?:Final|Last)?\s*Warning|(?:Final|Last|Legal|Critical|Content Violation)?\s*(?:Alert|Noti(?:ce|fication))|Appeal Required|Time.Sensitive|Critical.Alert|Important|Copyright Issue)\s*:\s*'
  )
  or any(ml.logo_detect(file.message_screenshot()).brands,
         .name in ("Facebook", "Meta", "Instagram", "Threads")
         and .confidence in ("medium", "high")
  )
  // any of the links are for newly registered domains
  or any(filter(body.links,
                .href_url.domain.domain not in $org_domains
                and .href_url.domain.root_domain not in (
                  "salesforce.com",
                  "force.com",
                  "site.com", // salesforce CRM
                  "agentforce.com"
                )
         ),
         network.whois(.href_url.domain).days_old < 30
  )
  // all links lead to a url shortener domain
  or (
    length(body.links) > 0
    and all(body.links, .href_url.domain.root_domain in $url_shorteners)
  )
)
and 1 of (
  ( // sender domain matches no body domains
    length(body.links) > 0
    and all(body.links,
            (
              .href_url.domain.root_domain != sender.email.domain.root_domain
              and .href_url.domain.root_domain not in (
                "salesforce.com",
                "force.com",
                "site.com",
                "agentforce.com"
              )
            )
            or .href_url.domain.root_domain is null
    )
  ),
  any(recipients.to,
      .email.domain.valid
      and any(body.links,
              strings.icontains(.href_url.url, ..email.email)
              or any(beta.scan_base64(.href_url.url,
                                      format="url",
                                      ignore_padding=true
                     ),
                     strings.icontains(., ...email.email)
              )
              or any(beta.scan_base64(.href_url.fragment, ignore_padding=true),
                     strings.icontains(., ...email.email)
              )
              // cloudflare turnstile or phishing warning page
              or strings.icontains(ml.link_analysis(., mode="aggressive").final_dom.display_text,
                                   "cloudflare"
              )
      )
  ),
  regex.icontains(subject.subject,
                  "termination.*notice",
                  "38417",
                  ":completed",
                  "[il1]{2}mit.*ma[il1]{2} ?bo?x",
                  "[il][il][il]egai[ -]",
                  "[li][li][li]ega[li] attempt",
                  "[ng]-?[io]n .*block",
                  "[ng]-?[io]n .*cancel",
                  "[ng]-?[io]n .*deactiv",
                  "[ng]-?[io]n .*disabl",
                  "action.*required",
                  "abandon.*package",
                  "about.your.account",
                  "acc(ou)?n?t (is )?on ho[li]d",
                  "acc(ou)?n?t.*terminat",
                  "acc(oun)?t.*[il1]{2}mitation",
                  "access.*limitation",
                  "account (will be )?block",
                  "account.*de-?activat",
                  "account.*locked",
                  "account.*restrict",
                  "account.*re-verification",
                  "account.*security",
                  "account.*suspension",
                  "account.has.been",
                  "account.has.expired",
                  "account.will.be.blocked",
                  "account v[il]o[li]at",
                  "activity.*acc(oun)?t",
                  "almost.full",
                  "app[li]e.[il]d",
                  "appeal required",
                  "authenticate.*account",
                  "been.*suspend",
                  "clos.*of.*account.*processed",
                  "confirm.your.account",
                  "copyright (?:restriction|infringment)",
                  "courier.*able",
                  "crediential.*notif",
                  "Critical Alert",
                  "deactivation.*in.*progress",
                  "delivery.*attempt.*failed",
                  "document.received",
                  "documented.*shared.*with.*you",
                  "dropbox.*document",
                  "e-?ma[il1]+ .{010}suspen",
                  "e-?ma[il1]{1} user",
                  "e-?ma[il1]{2} acc",
                  "e-?ma[il1]{2}.*up.?grade",
                  "e.?ma[il1]{2}.*server",
                  "e.?ma[il1]{2}.*suspend",
                  "email.update",
                  "faxed you",
                  "final notice",
                  "fraud(ulent)?.*charge",
                  "from.helpdesk",
                  "fu[il1]{2}.*ma[il1]+[ -]?box",
                  "has.been.*suspended",
                  "has.been.limited",
                  "have.locked",
                  "he[li]p ?desk upgrade",
                  "heipdesk",
                  "i[il]iega[il]",
                  "ii[il]ega[il]",
                  "immediate action",
                  "incoming e?mail",
                  "incoming.*fax",
                  "lock.*security",
                  "ma[il1]{1}[ -]?box.*quo",
                  "ma[il1]{2}[ -]?box.*fu[il1]",
                  "ma[il1]{2}box.*[il1]{2}mit",
                  "ma[il1]{2}box stor",
                  "mail on.?hold",
                  "mail.*box.*migration",
                  "mail.*de-?activat",
                  "mail.update.required",
                  "mails.*pending",
                  "messages.*pending",
                  "missed.*shipping.*notification",
                  "missed.shipment.notification",
                  "must.update.your.account",
                  "new [sl][io]g?[nig][ -]?in from",
                  "new voice ?-?mail",
                  "notifications.*pending",
                  "office.*3.*6.*5.*suspend",
                  "office365",
                  "on google docs with you",
                  "online doc",
                  "password.*compromised",
                  "periodic maintenance",
                  "potential(ly)? unauthorized",
                  "refund not approved",
                  "restrictions applied",
                  "report",
                  "revised.*policy",
                  "scam",
                  "scanned.?invoice",
                  "secured?.update",
                  "security breach",
                  "securlty",
                  "signed.*delivery",
                  "social media",
                  "status of your .{314}? ?delivery",
                  "susp[il1]+c[il1]+ous.*act[il1]+v[il1]+ty",
                  "suspicious.*sign.*[io]n",
                  "suspicious.activit",
                  "temporar(il)?y deactivate",
                  "temporar[il1]{2}y disab[li]ed",
                  "temporarily.*lock",
                  "time.sensitive",
                  "un-?usua[li].activity",
                  "unable.*deliver",
                  "unauthorized.*activit",
                  "unauthorized.device",
                  "unauthorized.use",
                  "undelivered message",
                  "unread.*doc",
                  "unusual.activity",
                  "upgrade.*account",
                  "upgrade.notice",
                  "urgent message",
                  "urgent.verification",
                  "v[il1]o[li1]at[il1]on security",
                  "va[il1]{1}date.*ma[il1]{2}[ -]?box",
                  "verification ?-?require",
                  "verification( )?-?need",
                  "verify.your?.account",
                  "web ?-?ma[il1]{2}",
                  "web[ -]?ma[il1]{2}",
                  "will.be.suspended",
                  "your (customer )?account .as",
                  "your.office.365",
                  "your.online.access",
                  "Critical.Notice",
                  "Restore.Access",
                  // https://github.com/sublime-security/static-files/blob/main/suspicious_subjects.txt
                  "account has been limited",
                  "action required",
                  "almost full",
                  "apd notifi cation",
                  "are you at your desk",
                  "are you available",
                  "attached file to docusign",
                  "banking is temporarily unavailable",
                  "bankofamerica",
                  "closing statement invoice",
                  "completed: docusign",
                  "de-activation of",
                  "delivery attempt",
                  "delivery stopped for shipment",
                  "detected suspicious",
                  "detected suspicious actvity",
                  "docu sign",
                  "document for you",
                  "document has been sent to you via docusign",
                  "document is ready for signature",
                  "docusign",
                  "encrypted message",
                  "failed delivery",
                  "fedex tracking",
                  "file was shared",
                  "freefax",
                  "fwd: due invoice paid",
                  "has shared",
                  "inbox is full",
                  "invitation to comment",
                  "invitation to edit",
                  "invoice due",
                  "left you a message",
                  "message from",
                  "new message",
                  "new voicemail",
                  "on desk",
                  "out of space",
                  "password reset",
                  "payment status",
                  "quick reply",
                  "re: w-2",
                  "required",
                  "required: completed docusign",
                  "remittance",
                  "ringcentral",
                  "scanned image",
                  "secured files",
                  "secured pdf",
                  "security alert",
                  "new sign-in",
                  "new sign in",
                  "sign-in attempt",
                  "sign in attempt",
                  "staff review",
                  "suspicious activity",
                  "unrecognized login attempt",
                  "upgrade immediately",
                  "urgent",
                  "wants to share",
                  "w2",
                  "you have notifications pending",
                  "your account",
                  'your (?:\w+\s+){0,1}\s*account',
                  "your amazon order",
                  "your document settlement",
                  "your order with amazon",
                  "your password has been compromised",
  ),
  any($suspicious_subjects, strings.icontains(subject.subject, .))
)
and (
  // if the From is a custom domain, check that it's an unknown sender
  // otherwise, it should be from salesforce
  (
    sender.email.domain.domain == "salesforce.com"
    and any(headers.hops,
            any(.fields,
                .name == "X-SFDC-EmailCategory"
                and .value in (
                  "apiMassMail",
                  "networksNewUser",
                  "Not Specified"
                )
            )
    )
    // negate "meta" emails from the mentioned org itself
    // for example, subject: "a sandbox has been deleted for org ID, a1b2c3"
    // the org ID will appear in the X-SFDC-LK header
    and not any(headers.hops,
                any(.fields,
                    .name == "X-SFDC-LK"
                    and strings.ends_with(subject.subject, .value)
                )
    )
  )
  or (
    (
      (
        profile.by_sender().prevalence in ("new", "outlier")
        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
    )
  )
)