""ET CURRENT_EVENTS RedKit/Sakura/CritX/SafePack/FlashPack applet + obfuscated URL Apr 10 2013""

SID: 2016751

Revision: 13

Class Type: trojan-activity

Metadata: created_at 2013_04_12, updated_at 2014_03_08, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,from_server

Contents:

• Value: "<applet"

Within:

PCRE: "/^((?!(?i:<\/applet>)).)+?(?i:value)[\r\n\s]=[\r\n\s]\x5c?\x22\x27(?P[^\x22\x27])(?P(?!(?P=h))[^\x22\x27])(?P=t)[^\x22\x27]{2}(?P(?!((?P=h)|(?P=t)))[^\x22\x27])(?P=slash)[^\x22\x27]+(?P=slash)/Rs"

Special Options:

• file_data

• nocase

source