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/*
This Yara ruleset is under the GNU-GPLv2 license (http://www.gnu.org/licenses/gpl-2.0.html) and open to any user or organization, as long as you use it under this license.
*/
/*
Yara Rule Set
Author: Florian Roth
Date: 2016-02-09
Identifier: Poseidon Group APT
*/
rule PoseidonGroup_Malware
{
meta:
description = "Detects Poseidon Group Malware"
author = "Florian Roth"
reference = "https://securelist.com/blog/research/73673/poseidon-group-a-targeted-attack-boutique-specializing-in-global-cyber-espionage/"
date = "2016-02-09"
score = 85
hash1 = "337e94119cfad0b3144af81b72ac3b2688a219ffa0bdf23ca56c7a68fbe0aea4"
hash2 = "344034c0bf9fcd52883dbc158abf6db687150d40a118d9cd6ebd843e186128d3"
hash3 = "432b7f7f7bf94260a58ad720f61d91ba3289bf0a9789fc0c2b7ca900788dae61"
hash4 = "8955df76182005a69f19f5421c355f1868efe65d6b9e0145625dceda94b84a47"
hash5 = "d090b1d77e91848b1e2f5690b54360bbbd7ef808d017304389b90a0f8423367f"
hash6 = "d7c8b47a0d0a9181fb993f17e165d75a6be8cf11812d3baf7cf11d085e21d4fb"
hash7 = "ded0ee29af97496f27d810f6c16d78a3031d8c2193d5d2a87355f3e3ca58f9b3"
strings:
$s1 = "c:\\winnt\\system32\\cmd.exe" fullword ascii
$s2 = "c:\\windows\\system32\\cmd.exe" fullword ascii
$s3 = "c:\\windows\\command.com" fullword ascii
$s4 = "copy \"%s\" \"%s\" /Y" fullword ascii
$s5 = "http://%s/files/" fullword ascii
$s6 = "\"%s\". %s: \"%s\"." fullword ascii
$s7 = "0x0666" fullword ascii
$s8 = "----------------This_is_a_boundary$" fullword ascii
$s9 = "Server 2012" fullword ascii /* Goodware String - occured 1 times */
$s10 = "Server 2008" fullword ascii /* Goodware String - occured 1 times */
$s11 = "Server 2003" fullword ascii /* Goodware String - occured 1 times */
$a1 = "net.exe group \"Domain Admins\" /domain" fullword ascii
$a2 = "net.exe group \"Admins. do Dom" fullword ascii
$a3 = "(SVRID=%d)" fullword ascii
$a4 = "(TG=%d)" fullword ascii
$a5 = "(SVR=%s)" fullword ascii
$a6 = "Set-Cookie:\\b*{.+?}\\n" fullword wide
$a7 = "net.exe localgroup Administradores" fullword ascii
condition:
( uint16(0) == 0x5a4d and filesize < 650KB and 6 of ($s*) ) or ( 4 of ($s*) and 1 of ($a*) )
}
rule PoseidonGroup_MalDoc_1
{
meta:
description = "Detects Poseidon Group - Malicious Word Document"
author = "Florian Roth"
reference = "https://securelist.com/blog/research/73673/poseidon-group-a-targeted-attack-boutique-specializing-in-global-cyber-espionage/"
date = "2016-02-09"
score = 80
hash = "0983526d7f0640e5765ded6be6c9e64869172a02c20023f8a006396ff358999b"
strings:
$s1 = "c:\\cmd32dll.exe" fullword ascii
condition:
uint16(0) == 0xcfd0 and filesize < 500KB and all of them
}
rule PoseidonGroup_MalDoc_2
{
meta:
description = "Detects Poseidon Group - Malicious Word Document"
author = "Florian Roth"
reference = "https://securelist.com/blog/research/73673/poseidon-group-a-targeted-attack-boutique-specializing-in-global-cyber-espionage/"
date = "2016-02-09"
score = 70
hash1 = "3e4cacab0ff950da1c6a1c640fe6cf5555b99e36d4e1cf5c45f04a2048f7620c"
hash2 = "1f77475d7740eb0c5802746d63e93218f16a7a19f616e8fddcbff07983b851af"
hash3 = "f028ee20363d3a17d30175508bbc4738dd8e245a94bfb200219a40464dd09b3a"
hash4 = "ec309300c950936a1b9f900aa30630b33723c42240ca4db978f2ca5e0f97afed"
hash5 = "27449198542fed64c23f583617908c8648fa4b4633bacd224f97e7f5d8b18778"
hash6 = "1e62629dae05bf7ee3fe1346faa60e6791c61f92dd921daa5ce2bdce2e9d4216"
strings:
$s0 = "{\\*\\generator Msftedit 5.41." ascii
$s1 = "Attachment 1: Complete Professional Background" ascii
$s2 = "E-mail: \\cf1\\ul\\f1"
$s3 = "Education:\\par" ascii
$s5 = "@gmail.com" ascii
condition:
uint32(0) == 0x74725c7b and filesize < 500KB and 3 of them
}