signature-base/yara/crime_hermes_ransom.yar

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rule Hermes2_1 {
meta:
description = "Detects Hermes Ransomware as used in BAE report on FEIB"
date = "2017/10/11"
author = "BAE"
reference = "https://baesystemsai.blogspot.de/2017/10/taiwan-heist-lazarus-tools.html"
hash = "b27881f59c8d8cc529fa80a58709db36"
strings:
$magic = { 4D 5A }
//in both version 2.1 and sample in Feb
$s1 = "SYSTEM\\CurrentControlSet\\Control\\Nls\\Language\\"
$s2 = "0419"
$s3 = "0422"
$s4 = "0423"
//in version 2.1 only
$S1 = "HERMES"
$S2 = "vssadminn"
$S3 = "finish work"
$S4 = "testlib.dll"
$S5 = "shadowstorageiet"
//maybe unique in the file
$u1 = "ALKnvfoi4tbmiom3t40iomfr0i3t4jmvri3tb4mvi3btv3rgt4t777"
$u2 = "HERMES 2.1 TEST BUILD, press ok"
$u3 = "hnKwtMcOadHwnXutKHqPvpgfysFXfAFTcaDHNdCnktA" //RSA Key part
condition:
$magic at 0 and all of ($s*) and 3 of ($S*) and 1 of ($u*)
}