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CVE-2025-30033 Siemens SIWA DLL Hijack: Detection & IOCs

Siemens first disclosed this in 2025. Planted DLLs run code in SIWA installers; the free Splunk SPL rule leads 9 detection rules and 17 IOCs.

Read the full threat intel for CVE-2025-30033 Siemens SIWA DLL Hijack: Detection & IOCs →

Chapters

  1. 0:00The hookOver one hundred Siemens products vulnerable.
  2. 0:04The storyA malicious DLL hijacks the Siemens installer.
  3. 0:12Attack pathA victim downloads the installer.
  4. 0:27AttributionNo threat actor is attributed.
  5. 0:31Indicators of compromise2 indicators to hunt: 1 path and 1 package name.
  6. 0:37MITRE ATT&CK techniques3 ATT&CK techniques, from execution to stealth.
  7. 0:42Remediation3 steps now: Install Siemens applications only from an empty directory so no.
  8. 0:50Detection rules9 detection rules, in SPL, KQL and Sigma.
Transcript

0:00Over one hundred Siemens products vulnerable.

0:05A malicious DLL hijacks the Siemens installer.

0:08Affects over one hundred industrial products.

0:13A victim downloads the installer. The user launches setup.

0:16Then the installer loads a hidden malicious DLL.

0:20Attacker code executes with the user's privileges.

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

0:322 indicators to hunt: 1 path and 1 package name.

0:383 ATT&CK techniques, from execution to stealth.

0:433 steps now: Install Siemens applications only from an empty directory so no.

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

0:56Threadlinqs. The unified security engineering platform.