Wanna_Cry_Ransomware_Generic

YARA detection rule by US-CERT Code Analysis Team · GPL-2.0

Detects WannaCry Ransomware on Disk and in Virtual Page

rule Wanna_Cry_Ransomware_Generic {
       meta:
              description = "Detects WannaCry Ransomware on Disk and in Virtual Page"
              author = "US-CERT Code Analysis Team"
              reference = "not set"                                        
              date = "2017/05/12"
       hash0 = "4DA1F312A214C07143ABEEAFB695D904"
       strings:
              $s0 = {410044004D0049004E0024}
              $s1 = "WannaDecryptor"
              $s2 = "WANNACRY"
              $s3 = "Microsoft Enhanced RSA and AES Cryptographic"
              $s4 = "PKS"
              $s5 = "StartTask"
              $s6 = "wcry@123"
              $s7 = {2F6600002F72}
              $s8 = "unzip 0.15 Copyrigh"
              $s9 = "Global\\WINDOWS_TASKOSHT_MUTEX"        
              $s10 = "Global\\WINDOWS_TASKCST_MUTEX"   
             $s11 = {7461736B736368652E657865000000005461736B5374617274000000742E776E7279000069636163}
             $s12 = {6C73202E202F6772616E742045766572796F6E653A46202F54202F43202F5100617474726962202B68}
             $s13 = "WNcry@2ol7"
             $s14 = "wcry@123"
             $s15 = "Global\\MsWinZonesCacheCounterMutexA"
       condition:
              $s0 and $s1 and $s2 and $s3 or $s4 and $s5 and $s6 and $s7 or $s8 and $s9 and $s10 or $s11 and $s12 or $s13 or $s14 or $s15
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

7c3597b5-9220-4850-8ba6-aa09fc6fbf07

Propose edits, view related rules, and engage with the community through comments.

Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

Community Discussion