signature-base/yara/apt_lotusblossom_elise.yar

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/*
Yara Rule Set
Author: Florian Roth
Date: 2018-01-24
Identifier: Lotus Blossom Elise Malware
Reference: https://community.rsa.com/community/products/netwitness/blog/2018/01/30/apt32-continues-asean-targeting
*/
import "pe"
/* Rule Set ----------------------------------------------------------------- */
rule Elise_Jan18_1 {
meta:
description = "Detects Elise malware samples - fake Norton Security NavShExt.dll"
license = "https://creativecommons.org/licenses/by-nc/4.0/"
author = "Florian Roth"
reference = "https://twitter.com/blu3_team/status/955971742329135105"
date = "2018-01-24"
hash1 = "6dc2a49d58dc568944fef8285ad7a03b772b9bdf1fe4bddff3f1ade3862eae79"
strings:
$s1 = "NavShExt.dll" fullword wide
$s2 = "Norton Security" fullword wide
$a1 = "donotbotherme" fullword ascii
condition:
uint16(0) == 0x5a4d and filesize < 250KB and (
pe.imphash() == "e9478ee4ebf085d1f14f64ba96ef082f" or
( 1 of ($s*) and $a1 )
)
}