""ET TROJAN Observed MSIL/n2019cov (COVID-19) Ransomware CnC Domain in TLS SNI""

SID: 2029735

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_03_25, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2020_03_25, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

• md5

• f02e5ae5b997e447a43ace281bc2bae9

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: established,to_server

Contents:

• Value: "|00 00 1a|n2019cov.000webhostapp.com|00|"

Within:

PCRE:

Special Options:

• fast_pattern

source