{"id":7617,"date":"2024-04-11T12:59:05","date_gmt":"2024-04-11T12:59:05","guid":{"rendered":"\/cybersecurity-blog\/?p=7617"},"modified":"2025-01-31T05:19:59","modified_gmt":"2025-01-31T05:19:59","slug":"encryption-in-malware","status":"publish","type":"post","link":"https:\/\/any.run\/cybersecurity-blog\/encryption-in-malware\/","title":{"rendered":"Understand Encryption in Malware:
From Basics to XOR"},"content":{"rendered":"\n

Encryption has been around since ancient times, with early examples dating back to ancient Egypt, where hieroglyphics were used to conceal the meaning of messages. Over the millennia, encryption has evolved and become more complex, but its purpose and basic principles have remained largely unchanged. <\/p>\n\n\n\n

Malware encryption is a common evasion and anti-analysis technique. You’ll often see 2 applications of it: <\/p>\n\n\n\n

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  1. Encrypted traffic (such as exfiltrated data sent to C2) <\/li>\n<\/ol>\n\n\n\n
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    1. Encrypted strings (hard-coded URLs, IP addresses, and other sensitive details that are part of the malware configuration file). <\/li>\n<\/ol>\n\n\n\n

      Both of these are used to convert data that could be scanned by security systems and set off alarms into something that appears random and unrecognizable. XOR encryption is a common method in malware that you will likely encounter sooner or later.\u00a0When assessing the threat from XOR encryption, the real danger is the delay in analysis, which makes it tougher for professionals to quickly identify and deal with malware.<\/p>\n\n\n\n\n

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      \u261d\ufe0f Common encryption methods:<\/div>\n <\/div>\n
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      • XOR<\/li>\n
      • Rc4<\/li>\n
      • AES<\/li>\n
      • DES<\/li>\n
      • 3DES (Tripple DES)<\/li>\n <\/ul>\n <\/div>\n<\/div>\n\n\n\n\n