Signature Base unknown stable yara

APT_MAL_REvil_Kaseya_Jul21_2 [yara]

Detects malware used in the Kaseya supply chain attack

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Detection Logic

uint16(0) == 0x5a4d and
      filesize < 3000KB and ( 2 of ($opa*) or 3 of them )

Field Validations

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