Sneed-Reactivity/yara-mikesxrs/Mandiant/UNC3524_sha1.yar

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rule UNC3524_sha1
{
meta:
author = "Mandiant"
reference = "https://www.mandiant.com/resources/unc3524-eye-spy-email"
date_created = "2022-01-19"
date_modified = "2022-01-19"
strings:
$h1 = { DD E5 D5 97 20 53 27 BF F0 A2 BA CD 96 35 9A AD 1C 75 EB 47 }
condition:
uint32be(0) == 0x7F454C46 and filesize < 10MB and all of them
}