/*

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.

*/

rule Exploit_MS15_077_078: Exploit {

meta:

description = "MS15-078 / MS15-077 exploit - generic signature"

author = "Florian Roth"

reference = "https://code.google.com/p/google-security-research/issues/detail?id=473&can=1&start=200"

date = "2015-07-21"

hash1 = "18e3e840a5e5b75747d6b961fca66a670e3faef252aaa416a88488967b47ac1c"

hash2 = "0b5dc030e73074b18b1959d1cf7177ff510dbc2a0ec2b8bb927936f59eb3d14d"

hash3 = "fc609adef44b5c64de029b2b2cff22a6f36b6bdf9463c1bd320a522ed39de5d9"

hash4 = "ad6bb982a1ecfe080baf0a2b27950f989c107949b1cf02b6e0907f1a568ece15"

strings:

$s1 = "GDI32.DLL" fullword ascii

$s2 = "atmfd.dll" fullword wide

$s3 = "AddFontMemResourceEx" fullword ascii

$s4 = "NamedEscape" fullword ascii

$s5 = "CreateBitmap" fullword ascii

$s6 = "DeleteObject" fullword ascii

$op0 = { 83 45 e8 01 eb 07 c7 45 e8 } /* Opcode */

$op1 = { 8d 85 24 42 fb ff 89 04 24 e8 80 22 00 00 c7 45 } /* Opcode */

$op2 = { eb 54 8b 15 6c 00 4c 00 8d 85 24 42 fb ff 89 44 } /* Opcode */

$op3 = { 64 00 88 ff 84 03 70 03 }

condition:

uint16(0) == 0x5a4d and filesize < 2000KB and all of ($s*) or all of ($op*)

}

rule Exploit_MS15_077_078_HackingTeam: Exploit {

meta:

description = "MS15-078 / MS15-077 exploit - Hacking Team code"

author = "Florian Roth"

date = "2015-07-21"

super_rule = 1

hash1 = "ad6bb982a1ecfe080baf0a2b27950f989c107949b1cf02b6e0907f1a568ece15"

hash2 = "fc609adef44b5c64de029b2b2cff22a6f36b6bdf9463c1bd320a522ed39de5d9"

strings:

$s1 = "\\SystemRoot\\system32\\CI.dll" fullword ascii /* PEStudio Blacklist: strings */

$s2 = "\\sysnative\\CI.dll" fullword ascii /* PEStudio Blacklist: strings */

$s3 = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36" fullword ascii /* PEStudio Blacklist: strings */

$s4 = "CRTDLL.DLL" fullword ascii

$s5 = "\\sysnative" fullword ascii /* PEStudio Blacklist: strings */

$s6 = "InternetOpenA coolio, trying open %s" fullword ascii

condition:

uint16(0) == 0x5a4d and filesize < 2500KB and all of them

}