APT_Carbanak.yar

/*
    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: 2015-09-03
	Identifier: Carbanak Rules
*/

/* Rule Set ----------------------------------------------------------------- */

rule Carbanak_0915_1
{

    meta:
        description = "Carbanak Malware"
        author = "Florian Roth"
        reference = "https://www.csis.dk/en/csis/blog/4710/"
        date = "2015-09-03"
        score = 70

    strings:
        $s1 = "evict1.pdb" fullword ascii
        $s2 = "http://testing.corp 0" fullword ascii

    condition:
        uint16(0) == 0x5a4d and filesize < 100KB and 1 of them
}

rule Carbanak_0915_2
{

    meta:
        description = "Carbanak Malware"
        author = "Florian Roth"
        reference = "https://www.csis.dk/en/csis/blog/4710/"
        date = "2015-09-03"
        score = 70

    strings:
        $x1 = "8Rkzy.exe" fullword wide
        $s1 = "Export Template" fullword wide
        $s2 = "Session folder with name '%s' already exists." fullword ascii
        $s3 = "Show Unconnected Endpoints (Ctrl+U)" fullword ascii
        $s4 = "Close All Documents" fullword wide
        $s5 = "Add &Resource" fullword ascii
        $s6 = "PROCEXPLORER" fullword wide /* Goodware String - occured 1 times */
        $s7 = "AssocQueryKeyA" fullword ascii /* Goodware String - occured 4 times */
    condition:
        uint16(0) == 0x5a4d and filesize < 500KB and ( $x1 or all of ($s*) )
}

rule Carbanak_0915_3
{

    meta:
        description = "Carbanak Malware"
        author = "Florian Roth"
        reference = "https://www.csis.dk/en/csis/blog/4710/"
        date = "2015-09-03"
        score = 70

    strings:
        $s1 = "wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww" fullword ascii
        $s2 = "SHInvokePrinterCommandA" fullword ascii
        $s3 = "Ycwxnkaj" fullword ascii

    condition:
        uint16(0) == 0x5a4d and filesize < 700KB and all of them
}