The simplest way ( and the least subtle ) was to overwrite the first part of the executable file with the virus code.

最简单的方法就是用病毒代码改写可执行文件的开头部分。

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Solution: AsiaInfo security AsiaInfo security virus code version 13.220.60 already contains the detection of the virus detection, called BKDR_MIRAI. A, please update the virus code version.

亚信安全解决方案：亚信安全病毒码版本13.220.60已经包含对该病毒的检测，检测名为BKDR_MIRAI . A，请及时更新病毒码版本。

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It does this by looking for virus "signatures" - chunks of computer code from known viruses.

它通过寻找计算机病毒的“签名”(已知计算机病毒代码的标本)来做这件事情。

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"It is a bit ironic, but the fact that Apple currently has such a small market share versus Microsoft 's Windows means that there are far fewer hackers writing virus code for the Macintosh operating system, " says Pile, who notes the premium IT managers place on system reliability.

FORBES: Apple's New Core

The virus' genetic code was uncovered with one of the most common tests in biology, the polymerase chain reaction, or PCR.

FORBES: Magazine Article

There are, after all, secrets to safeguard behind these doors, where virus experts scan virulent code, design cures and create advanced encryption systems.

CNN: Virus protection coming for wireless users