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Re:Understanding REvil: The Ransomware Gang Behind the Kasey... by mc32 on Thursday July 08, 2021 @10:59AM (#27772801)
This attack apparently departed from previous tactics:

They deployed the payload via a trusted channel (Kaseya) which allowed deployment of any executable via system privs.

They looked for certain AV products and only executed if it was on their list.

They didn't delete shadow copies. (to avoid behavioral detection)

They didn't try to exfiltrate data. (to avoid behavioral detection)

They did a combo of automation and typical hollywood hacker on keyboard command and control.

No dwell time.

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