Hackers using concealed packers to avoid detection
Obfuscation makes it harder for humans to understand the code running, but this is not the case for the machine, which will run it as normal.
Researchers said this significant percentage of files indicates continued adoption of obfuscation techniques by cyber criminals that want to stay under the radar.
While hackers use packers to compress and encrypt code to prevent detection, the obfuscated code samples appear similar. This is because the same packers are used, making the code structure similar despite having different functions.
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While many obfuscated code samples appeared to be malicious, the report said 0.5% of the 20,000 top-ranking websites on the web were also using obfuscation techniques.
The researchers found that legit websites use obfuscation for various reasons. Some use it to conceal their client-side code functionality, while others have code that a third-party provider obfuscated. Some also use it to protect sensitive information, like email addresses.
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