""ET TROJAN MSIL/JobCrypter Ransomware Checkin via SMTP""

SID: 2030672

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_08_11, deployment Perimeter, former_category MALWARE, malware_family JobCrypter, signature_severity Major, tag Ransomware, updated_at 2020_08_11, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

• md5

• 3bb560cb690a91134508910178928973

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: [25,2525,587]

Flow: to_server,established

Contents:

• Value: "|0d 0a 0d 0a|jui=0D=0A=0D=0Atre|3a 20|"

• Value: "|0d 0a 0d 0a 2e 0d 0a|"

Within:

PCRE:

Special Options:

• fast_pattern

source