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SkyW4lker Adobe PDF Device-Code Phishing: Detection & IOCs

An Adobe-hosted PDF lure leads to a device-code OAuth token theft on Microsoft 365. 9 detection rules, 27 IOCs and a free Splunk SPL rule cover it.

Read the full threat intel for SkyW4lker Adobe PDF Device-Code Phishing: Detection & IOCs →

Chapters

  1. 0:00The hookAbout 618 sandbox analyses.
  2. 0:04The storyKit abuses device codes.
  3. 0:11Attack pathLures impersonate invoices and contracts.
  4. 0:24AttributionNo threat actor is attributed.
  5. 0:29Indicators of compromise21 indicators to hunt: 3 IPs, 13 domains and 3 URLs, and more.
  6. 0:37MITRE ATT&CK techniques13 ATT&CK techniques, from reconnaissance to collection.
  7. 0:42Remediation3 steps now: Block or sinkhole the SkyW4lker domains, hostnames and IPs listed.
  8. 0:50Detection rules9 detection rules, in SPL, KQL and Sigma.
Transcript

0:00About 618 sandbox analyses.

0:05Kit abuses device codes.

0:07Victims type it on Microsoft's page.

0:11Lures impersonate invoices and contracts.

0:14A trusted-platform PDF link leads through a bot-check gate.

0:18Then a device code appears.

0:20Attackers then get a token.

0:25No threat actor is attributed. Confidence: low.

0:3021 indicators to hunt: 3 IPs, 13 domains and 3 URLs, and more.

0:3713 ATT&CK techniques, from reconnaissance to collection.

0:423 steps now: Block or sinkhole the SkyW4lker domains, hostnames and IPs listed.

0:519 detection rules, in SPL, KQL and Sigma.

0:56Threadlinqs. The unified security engineering platform.