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tRat is a new modular RAT used by the threat actor TA505

The threat actor TA505 behind manyDridexand Locky campaigns have been using a new Remote Access Trojan (RAT)dubbed tRat.

Researchers at Proofpoint warns that the threat actor TA505 have been using a new Remote Access Trojan (RAT) dubbed tRatthat implements a modular structure that was written in Delphi.

The TA505operates on a large scale, it was behind other major campaigns leveraging theNecurs botnetto deliver other malware, including theLocky ransomware, theJaff ransomware,andtheDridex banking Trojan.

The new strain of malware was first discovered at the end of September when it was distributed through weaponized Word documents that download the RAT.

Attackers used documents that abused the Norton brand, subject lines on the messages reinforced the social engineering, stating “I have securely shared file(s) with you.”

At the time of the discovery, the experts did not attribute it to a specific threat actor, but in October researchers found evidence of use made byTA505.


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