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Threat Group Cards: A Threat Actor Encyclopedia

Permanent link Tool: TriFive

NamesTriFive
CategoryMalware
TypeBackdoor
Description(Palo Alto) TriFive is a previously unseen PowerShell-based backdoor that the xHunt actors installed on the compromised Exchange server, executing every five minutes via a scheduled task. TriFive provided backdoor access to the Exchange server by logging into a legitimate user’s inbox and obtaining a PowerShell script from an email draft within the deleted emails folder. The TriFive sample used a legitimate account name and credentials from the targeted organization. This suggests that the threat actor had stolen the account’s credentials prior to the installation of the TriFive backdoor.
Information<https://unit42.paloaltonetworks.com/xhunt-campaign-backdoors/>

Last change to this tool card: 20 January 2021

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All groups using tool TriFive

ChangedNameCountryObserved

APT groups

 xHuntIran2018-Aug 2019 

1 group listed (1 APT, 0 other, 0 unknown)

Digital Service Security Center
Electronic Transactions Development Agency

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