""ET TROJAN Possible CryptXXX Ransomware Renaming Encrypted File SMB v1 Unicode""
SID: 2022838
Revision: 1
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2016_05_25, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2016_05_25, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: [445,139]
Flow: to_server,established
Contents:
-
Value: "|ff|SMB|07|" Depth: 5 Offset: 4
-
Value: "|00|.|00|c|00|r|00|y|00|p|00|t|00 00|"
Within:
PCRE:
Special Options:
-
nocase
-
fast_pattern