Compressed File Handling

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Compressed files provide a number of special security concerns. Compressed files can be password-protected or encrypted, can harbor so-called zip-of-death security risks, and can contain numerous layers of compression.

Keywords: compressed file handling,compressed files

Table of Contents

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Expressions","url":"im-security-165-administrators-help-predefined-expressio"},{"title":"Customized Expressions","url":"im-security-165-administrators-help-imsec-imsec-dlp-exp-","children":[{"title":"Criteria for Customized Expressions","url":"im-security-165-administrators-help-criteria-for-customi"}]},{"title":"Adding and Editing Expressions","url":"im-security-165-administrators-help-smex-adding-and-edit"},{"title":"Importing Expressions","url":"im-security-165-administrators-help-imsec-dlp-imsec-expr"}]},{"title":"Keywords","url":"im-security-165-administrators-help-keywords","children":[{"title":"Predefined Keyword Lists","url":"im-security-165-administrators-help-predefined-keyword-l"},{"title":"Customized Keyword Lists","url":"im-security-165-administrators-help-customized-keyword-l","children":[{"title":"Customized Keyword List Criteria","url":"im-security-165-administrators-help-customized-keyword-l_001"}]},{"title":"Adding and Editing Keyword 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Reports","url":"im-security-165-administrators-help-smex-scheduled-repor","children":[{"title":"Generating Scheduled Reports","url":"im-security-165-administrators-help-imsec-imsec-rpts-sch"}]},{"title":"Report Maintenance","url":"im-security-165-administrators-help-smex-report-maintena"}]},{"title":"About Logs","url":"im-security-165-administrators-help-imsec-about-logs","children":[{"title":"Querying Logs","url":"im-security-165-administrators-help-imsec-imsec-logs-que"},{"title":"Performing Manual Log Maintenance","url":"im-security-165-administrators-help-imsec-imsec-logs-mai_001"},{"title":"Performing Scheduled Log Maintenance","url":"im-security-165-administrators-help-imsec-imsec-logs-mai"}]}]},{"title":"Performing Administrative Tasks","url":"im-security-165-administrators-help-imsec-performing-adm","children":[{"title":"Configuring Proxy Settings","url":"im-security-165-administrators-help-imsec-imsec-adm-prox"},{"title":"IM Security Directories","url":"im-security-165-administrators-help-imsec-product-short-_003","children":[{"title":"Configuring Directories","url":"im-security-165-administrators-help-imsec-configuring-di"}]},{"title":"Disclaimer Statements","url":"im-security-165-administrators-help-imsec-disclaimer-sta","children":[{"title":"Configuring Disclaimers for Internal and External Chat Sessions","url":"im-security-165-administrators-help-imsec-configuring-di_001"}]},{"title":"Notification Settings","url":"im-security-165-administrators-help-imsec-notification-s","children":[{"title":"Configuring Administrator Notification Settings","url":"im-security-165-administrators-help-imsec-configuring-ad"}]},{"title":"About Access Control","url":"im-security-165-administrators-help-imsec-about-access-c","children":[{"title":"Access Control Permissions","url":"im-security-165-administrators-help-imsec-imsec-adm-acs-_001"},{"title":"Enabling Access Control","url":"im-security-165-administrators-help-imsec-enabling-acces"},{"title":"Configuring Access Control","url":"im-security-165-administrators-help-imsec-imsec-adm-acs-"}]},{"title":"Product License","url":"im-security-165-administrators-help-imsec-product-licens","children":[{"title":"Standard Maintenance Agreement","url":"im-security-165-administrators-help-imsec-standard-maint"},{"title":"Renewing the Product License","url":"im-security-165-administrators-help-imsec-renewing-the-p"}]},{"title":"About Trend Micro Control Manager","url":"im-security-165-administrators-help-about-company-name-c","children":[{"title":"About Trend Micro Management Communication Protocol","url":"im-security-165-administrators-help-about-company-name-m"},{"title":"Using IM Security with Control Manager","url":"im-security-165-administrators-help-imsec-imsec-tmcm-int"},{"title":"Registering to Control Manager","url":"im-security-165-administrators-help-imsec-tmcm-imsec-reg"},{"title":"Unregistering IM Security from Control Manager","url":"im-security-165-administrators-help-smex-unregistering-p"}]},{"title":"Using the Debug Logs","url":"im-security-165-administrators-help-imsec-imsec-debug-us"}]}]},{"title":"Getting Help","url":"im-security-165-administrators-help-imsec-getting-help","children":[{"title":"Understanding Security Risks","url":"im-security-165-administrators-help-understanding-securi","children":[{"title":"Understanding the Terms","url":"im-security-165-administrators-help-understanding-the-te"},{"title":"About Internet Security Risks","url":"im-security-165-administrators-help-about-internet-secur","children":[{"title":"Viruses/Malware","url":"im-security-165-administrators-help-virusesmalware","children":[{"title":"Virus/Malware Writers","url":"im-security-165-administrators-help-virusmalware-writers"},{"title":"Malware Naming","url":"im-security-165-administrators-help-malware-naming"}]},{"title":"Compressed Files","url":"im-security-165-administrators-help-secrisk-cmprssd-file"},{"title":"Joke Programs","url":"im-security-165-administrators-help-joke-programs"},{"title":"Macro Viruses/Malware","url":"im-security-165-administrators-help-macro-virusesmalware"},{"title":"Mass-Mailing Attacks","url":"im-security-165-administrators-help-mass-mailing-attacks"},{"title":"Trojan Horse Programs","url":"im-security-165-administrators-help-trojan-horse-program"},{"title":"Worms","url":"im-security-165-administrators-help-worms"},{"title":"Zip of Death","url":"im-security-165-administrators-help-zip-of-death"}]},{"title":"About Spyware/Grayware","url":"im-security-165-administrators-help-about-spywaregraywar","children":[{"title":"Potential Risks and Threats","url":"im-security-165-administrators-help-potential-risks-and-","children":[{"title":"How Spyware/Grayware Gets into your Network","url":"im-security-165-administrators-help-how-spywaregrayware-"}]},{"title":"Encoding 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FAQs","url":"im-security-165-administrators-help-imsec-troubleshootin","children":[{"title":"Determining the Product Version","url":"im-security-165-administrators-help-determining-the-prod"},{"title":"Product Activation Issues","url":"im-security-165-administrators-help-product-activation-i"},{"title":"Product Console Access Issues","url":"im-security-165-administrators-help-product-console-acce","children":[{"title":"Adding the IM Security Website from SharePoint's Exclusion List","url":"im-security-165-administrators-help-adding-the-product-s"}]},{"title":"Component Update Issues","url":"im-security-165-administrators-help-component-update-iss"},{"title":"Using the Debug Logs","url":"im-security-165-administrators-help-imsec-imsec-debug-us_001"},{"title":"Alert Issues","url":"im-security-165-administrators-help-alert-issues"},{"title":"Report Issues","url":"im-security-165-administrators-help-report-issues","children":[{"title":"Report Generation Issues","url":"im-security-165-administrators-help-report-generation-is"},{"title":"PDF or HTML Report Display Issues","url":"im-security-165-administrators-help-pdf-or-html-report-d"}]},{"title":"Log Issues","url":"im-security-165-administrators-help-log-issues"},{"title":"Notification Issues","url":"im-security-165-administrators-help-notification-issues","children":[{"title":"Email Notifications","url":"im-security-165-administrators-help-email-notifications"},{"title":"SNMP Trap Notification","url":"im-security-165-administrators-help-snmp-trap-notificati"}]},{"title":"Frequently Asked Questions (FAQ)","url":"im-security-165-administrators-help-frequently-asked-que","children":[{"title":"General Product Knowledge","url":"im-security-165-administrators-help-general-product-know","children":[{"title":"What is IM Security?","url":"im-security-165-administrators-help-imsec-what-is-produc"},{"title":"How does IM Security protect my Lync/Skype for Business 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services?","url":"im-security-165-administrators-help-which-account-is-use"},{"title":"What do I do if the “Trend Micro IM Security Server” service is unable to start successfully?","url":"im-security-165-administrators-help-what-do-i-do-if-the-"},{"title":"How do I change the account used to start the IM Security services?","url":"im-security-165-administrators-help-how-do-i-change-the-"}]},{"title":"Registration and Activation","url":"im-security-165-administrators-help-registration-and-act","children":[{"title":"Where can I get a Registration Key or Activation Code?","url":"im-security-165-administrators-help-where-can-i-get-a-re"}]},{"title":"Contacts","url":"im-security-165-administrators-help-contacts","children":[{"title":"What is the \"Selected List\"?","url":"im-security-165-administrators-help-what-is-the-selected"},{"title":"What is the \"Exempted List\"?","url":"im-security-165-administrators-help-what-is-the-exempted"}]},{"title":"Administration","url":"im-security-165-administrators-help-administration","children":[{"title":"How does IM Security send notifications to network/mail administrators and contacts?","url":"im-security-165-administrators-help-how-does-product-sho_001"},{"title":"How does IM Security populate the Server Management list?","url":"im-security-165-administrators-help-how-does-product-sho"},{"title":"Can I replicate my local IM Security server settings to another server(s)? If so, how?","url":"im-security-165-administrators-help-can-i-replicate-my-l"},{"title":"What are the web protocols that IM Security supports?","url":"im-security-165-administrators-help-what-are-the-web-pro"},{"title":"In which folder can I locate IM Security after registering to the Trend Micro Control Manager server?","url":"im-security-165-administrators-help-in-which-folder-can-"}]}]}]},{"title":"Technical support","url":"im-security-165-administrators-help-technical-support","children":[{"title":"Troubleshooting resources","url":"im-security-165-administrators-help-troubleshooting-reso","children":[{"title":"Using the support portal","url":"im-security-165-administrators-help-using-the-support-po"},{"title":"Threat encyclopedia","url":"im-security-165-administrators-help-threat-encyclopedia"}]},{"title":"Contacting Trend Micro","url":"im-security-165-administrators-help-contacting-trend-mic","children":[{"title":"Speeding up the support call","url":"im-security-165-administrators-help-speeding-up-the-supp"}]},{"title":"Sending suspicious content to Trend Micro","url":"im-security-165-administrators-help-sending-suspicious-c","children":[{"title":"Email Reputation Services","url":"im-security-165-administrators-help-email-reputation-ser"},{"title":"File Reputation Services","url":"im-security-165-administrators-help-file-reputation-serv"},{"title":"Web Reputation Services","url":"im-security-165-administrators-help-web-reputation-servi"}]},{"title":"Other resources","url":"im-security-165-administrators-help-other-resources","children":[{"title":"Download center","url":"im-security-165-administrators-help-download-center"}]}]}]},{"title":"Appendices","url":"im-security-165-administrators-help-imsec-appendices","children":[{"title":"Performance Counters","url":"im-security-165-administrators-help-imsec-performance-co","children":[{"title":"Real-time Scan Performance Counters","url":"im-security-165-administrators-help-real-time-scan-perfo"},{"title":"Virus Scan Performance Counters","url":"im-security-165-administrators-help-virus-scan-performan"},{"title":"File Blocking Performance Counters","url":"im-security-165-administrators-help-file-blocking-perfor"},{"title":"Content Filtering Performance Counters","url":"im-security-165-administrators-help-content-filtering-pe"},{"title":"Web Reputation Performance Counters","url":"im-security-165-administrators-help-web-reputation-perfo"},{"title":"Data Loss Prevention Performance Counters","url":"im-security-165-administrators-help-data-loss-prevention"},{"title":"Directory Service Access Performance Counters","url":"im-security-165-administrators-help-directory-service-ac"},{"title":"Instant Messaging Hook Module Performance Counters","url":"im-security-165-administrators-help-instant-messaging-ho"},{"title":"File Transfer Hook Module Performance Counters","url":"im-security-165-administrators-help-file-transfer-hook-m"},{"title":"Session Management Performance Counters","url":"im-security-165-administrators-help-session-management-p"},{"title":"Disclaimer Performance Counters","url":"im-security-165-administrators-help-disclaimer-performan"}]},{"title":"IM Security and Control Manager Logs and Actions Comparison","url":"im-security-165-administrators-help-imsec-product-short-_001","children":[{"title":"IM Security and Control Manager Logs and Actions","url":"im-security-165-administrators-help-imsec-product-short-","children":[{"title":"Virus Scan and Additional Threats","url":"im-security-165-administrators-help-imsec-virus-scan-and"},{"title":"File Blocking, Content Filtering, and Data Loss Prevention for File Transfers and Instant Messages","url":"im-security-165-administrators-help-imsec-file-blocking-"},{"title":"Web Reputation","url":"im-security-165-administrators-help-imsec-web-reputation"}]}]},{"title":"Glossary","url":"im-security-165-administrators-help-imsec-glossary"}]}]

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