Sigma rule: Old TLS1.0/TLS1.1 Protocol Version Enabled

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-c1ead4aa0369, updated 2023-09-05T00:00:00.000Z.

Rule

Title
Old TLS1.0/TLS1.1 Protocol Version Enabled
Status
test
Level
medium
Author
Nasreddine Bencherchali (Nextron Systems)
Date
2023-09-05
File
rules/windows/registry/registry_set/registry_set_tls_protocol_old_version_enabled.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects applications or users re-enabling old TLS versions by setting the "Enabled" value to "1" for the "Protocols" registry key.

Log source

product
windows
category
registry_set

Detection

selection:
    TargetObject|contains:
        - '\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\'
        - '\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\'
    TargetObject|endswith: '\Enabled'
    Details: 'DWORD (0x00000001)'
condition: selection

False positives (as the rule lists them)

  • Legitimate enabling of the old tls versions due to incompatibility

Tags

  • attack.stealth

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_set/registry_set_tls_protocol_old_version_enabled.yml

Sources and licences

  • SigmaHQ

    "Old TLS1.0/TLS1.1 Protocol Version Enabled" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_set/registry_set_tls_protocol_old_version_enabled.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Old TLS1.0/TLS1.1 Protocol Version Enabled",
entity page, dataset version ref-c1ead4aa0369, updated 2023-09-05T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/439957a7-ad86-4a8f-9705-a28131c6821b (accessed 2026-11-03).
Underlying source: SigmaHQ rule 439957a7-ad86-4a8f-9705-a28131c6821b, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.