/* 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 Furtim_nativeDLL { meta: description = "Detects Furtim malware - file native.dll" author = "Florian Roth" reference = "MISP 3971" date = "2016-06-13" hash1 = "4f39d3e70ed1278d5fa83ed9f148ca92383ec662ac34635f7e56cc42eeaee948" strings: $s1 = "FqkVpTvBwTrhPFjfFF6ZQRK44hHl26" fullword ascii $op0 = { e0 b3 42 00 c7 84 24 ac } /* Opcode */ $op1 = { a1 e0 79 44 00 56 ff 90 10 01 00 00 a1 e0 79 44 } /* Opcode */ $op2 = { bf d0 25 44 00 57 89 4d f0 ff 90 d4 02 00 00 59 } /* Opcode */ condition: uint16(0) == 0x5a4d and filesize < 900KB and $s1 or all of ($op*) } rule Furtim_Parent_1 { meta: description = "Detects Furtim Parent Malware" author = "Florian Roth" reference = "https://sentinelone.com/blogs/sfg-furtims-parent/" date = "2016-07-16" hash1 = "766e49811c0bb7cce217e72e73a6aa866c15de0ba11d7dda3bd7e9ec33ed6963" strings: /* RC4 encryption password */ $x1 = "dqrChZonUF" fullword ascii /* Other strings */ $s1 = "Egistec" fullword wide $s2 = "Copyright (C) 2016" fullword wide /* Op Code */ $op1 = { c0 ea 02 88 55 f8 8a d1 80 e2 03 } $op2 = { 5d fe 88 55 f9 8a d0 80 e2 0f c0 } $op3 = { c4 0c 8a d9 c0 eb 02 80 e1 03 88 5d f8 8a d8 c0 } condition: ( uint16(0) == 0x5a4d and filesize < 900KB and ( $x1 or ( all of ($s*) and all of ($op*) ) ) ) or all of them }