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Nimbus Manticore Expands Toolset With TWOSTROKE-Like Backdoor and SSH Tunneler

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Nimbus Manticore Expands Toolset With TWOSTROKE-Like Backdoor and SSH Tunneler

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Nimbus Manticore Expands Toolset With TWOSTROKE-Like Backdoor and SSH Tunneler

Researchers identified new infrastructure and previously undocumented malware linked to Nimbus Manticore, an Iranian state-sponsored group affiliated with the Islamic Revolutionary Guard Corps. The group deployed a TWOSTROKE-like backdoor and SSH tunneler as part of its expanding toolset. Group-IB characterizes Nimbus Manticore as one of the most active Iranian advanced persistent threat (APT) groups in 2026.

Why it matters: Organizations in the Middle East, energy, telecommunications, and government sectors face ongoing reconnaissance and compromise risks from this active Iranian state-sponsored group and should monitor for the newly documented backdoor and tunneling indicators of compromise (IOCs).

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