Sneed-Reactivity/yara-Neo23x0/gen_rar_exfil.yar

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rule SUSP_RAR_NtdsDIT {
meta:
description = "Detects suspicious RAR file that contains ntds.dit or SAM export"
author = "Florian Roth (Nextron Systems)"
reference = "https://www.cybereason.com/blog/operation-soft-cell-a-worldwide-campaign-against-telecommunications-providers"
date = "2019-12-16"
modified = "2022-11-15" // only synced the name with our internal rule
score = 70
id = "da9e160f-3213-5027-bb0f-bf80ab3d5318"
strings:
$x1 = "ntds.dit0" ascii fullword
$x2 = { 0? 53 41 4D 30 01 00 03 } // SAM0
$x3 = { 0? 73 61 6D 30 01 00 03 } // sam0
condition:
uint32(0) == 0x21726152 // Rar!
and 1 of them
}