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A threat activity group has been detected aiming at fully-updated, end-of-life SonicWall Secure Mobile Access (SMA) 100 series devices as part of a campaign intended to deploy a backdoor known as OVERSTEP.

The harmful actions, traced back to at least October 2024, have been linked by the Google Threat Intelligence Group (GTIG) to a collective it monitors as UNC6148.

The technology giant evaluated with

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