View difference between Paste ID: qKyLQqGY and FKgEjYHu

 /*
 Four YARA rules to check for payloads on systems. Thanks to sinkholing, encyrption may not occur, BUT you may still have binaries lying around.
 If you get a match for "WannaDecryptor" and not for Wanna_Sample, then you may have a variant!
 
 Check out http://yara.readthedocs.io on how to write and add a rule as below and index your
 rule by the sample hashes.  Add, share, rinse and repeat!
 */
 
 rule WannaDecryptor: WannaDecryptor
 {
         meta:
                 description = "Detection for common strings of WannaDecryptor"
 
         strings:
                 $id1 = "taskdl.exe"
                 $id2 = "taskse.exe"
                 $id3 = "r.wnry"
                 $id4 = "s.wnry"
                 $id5 = "t.wnry"
                 $id6 = "u.wnry"
                 $id7 = "msg/m_"
 
         condition:
                 3 of them
 }
 rule Wanna_Sample_84c82835a5d21bbcf75a61706d8ab549: Wanna_Sample_84c82835a5d21bbcf75a61706d8ab549
 {
         meta:
                 description = "Specific sample match for WannaCryptor"
                 MD5 = "84c82835a5d21bbcf75a61706d8ab549"
                 SHA1 = "5ff465afaabcbf0150d1a3ab2c2e74f3a4426467"
                 SHA256 = "ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa"
                 INFO = "Looks for 'taskdl' and 'taskse' at known offsets"
 
         strings:
                 $taskdl = { 00 74 61 73 6b 64 6c }
                 $taskse = { 00 74 61 73 6b 73 65 }
 
         condition:
                 $taskdl at 3419456 and $taskse at 3422953
 }
 rule Wanna_Sample_4da1f312a214c07143abeeafb695d904: Wanna_Sample_4da1f312a214c07143abeeafb695d904
 {
         meta:
                 description = "Specific sample match for WannaCryptor"
                 MD5 = "4da1f312a214c07143abeeafb695d904"
                 SHA1 = "b629f072c9241fd2451f1cbca2290197e72a8f5e"
                 SHA256 = "aee20f9188a5c3954623583c6b0e6623ec90d5cd3fdec4e1001646e27664002c"
                 INFO = "Looks for offsets of r.wry and s.wry instances"
 
         strings:
                 $rwnry = { 72 2e 77 72 79 }
                 $swnry = { 73 2e 77 72 79 }
 
         condition:
                 $rwnry at 88195 and $swnry at 88656 and $rwnry at 4495639
 }
 rule NHS_Strain_Wanna: NHS_Strain_Wanna
 {
         meta:
                 description = "Detection for worm-strain bundle of Wcry, DOublePulsar"
                 MD5 = "db349b97c37d22f5ea1d1841e3c89eb4"
                 SHA1 = "e889544aff85ffaf8b0d0da705105dee7c97fe26"
                 SHA256 = "24d004a104d4d54034dbcffc2a4b19a11f39008a575aa614ea04703480b1022c"
                 INFO = "Looks for specific offsets of c.wnry and t.wnry strings"
 
         strings:
                 $cwnry = { 63 2e 77 6e 72 79 }
                 $twnry = { 74 2e 77 6e 72 79 }
 
         condition:
                 $cwnry at 262324 and $twnry at 267672 and $cwnry at 284970
 }