108. IronHusky Abuses Piping Server for C&C

Hello everyone! Today we'll talk about another interesting service abused by the threat actors for C&C communications.

According to this report by Kaspersky team, IronHusky used the legitimate https://ppng[.]io server powered by the piping-server project to request commands and send back their execution results.

What does it mean? We can hunt for communications with this domain:

event_type: "dnsreq"

AND

dns_rname: "ppng.io"

The adversary leveraged aforementioned backdoor to download MysterySnail RAT.

See you tomorrow!

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