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Falcon XG Browser C2 and Antino: Detection & IOCs

Falcon injects scripts and a rogue PDF Viewer extension to steal browser passwords, then drops Antino. 9 detection rules, 27 IOCs and a free Splunk SPL rule.

Read the full threat intel for Falcon XG Browser C2 and Antino: Detection & IOCs →

Chapters

  1. 0:00The hookFalcon hit governments in 5 countries.
  2. 0:04The storyFrom March, Falcon targeted government entities.
  3. 0:12Attack pathFalcon reportedly compromises browsers.
  4. 0:27AttributionNo threat actor is attributed.
  5. 0:31Indicators of compromise24 indicators to hunt: 1 IP, 6 domains and 1 URL, and more.
  6. 0:38MITRE ATT&CK techniques18 ATT&CK techniques, from resource development to command and control.
  7. 0:43Remediation6 steps now: Block Falcon C2 and delivery domains.
  8. 0:50Detection rules9 detection rules, in SPL, KQL and Sigma.
Transcript

0:00Falcon hit governments in 5 countries.

0:05From March, Falcon targeted government entities.

0:08Targets included webmail, police and justice entities.

0:12Falcon reportedly compromises browsers.

0:15A police web app showed a fake Flash prompt.

0:18Victims ran the installer, delivering Antino.

0:21The implant held an encrypted link.

0:23Credentials and mail were stolen.

0:27No threat actor is attributed. Confidence: low.

0:3224 indicators to hunt: 1 IP, 6 domains and 1 URL, and more.

0:3818 ATT&CK techniques, from resource development to command and control.

0:446 steps now: Block Falcon C2 and delivery domains.

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

0:56Threadlinqs. The unified security engineering platform.