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#linux #bash #obfuscation #technique #bashfuscation
padding commands with history expansion characters (#exclamation mark (!))
! ! ! ! echo this is test
(removed the previous tweet as I revealed too much info !)
padding commands with history expansion characters (#exclamation mark (!))
! ! ! ! echo this is test
(removed the previous tweet as I revealed too much info !)
#linux #bash #obfuscation #bashfuscation
using history expansion character -> !! (i.e. last command)
ca
!!t really
is equivalent to
cat really
(only 4 interactive shell)
using history expansion character -> !! (i.e. last command)
ca
!!t really
is equivalent to
cat really
(only 4 interactive shell)
#linux #bash #obfuscation #bashfuscation
padding commands with empty commands (: ;)
: -> true (do nothing)
; -> command separator
: : ; : ; cat really
! ! ! : : ; : ; cat really
padding commands with empty commands (: ;)
: -> true (do nothing)
; -> command separator
: : ; : ; cat really
! ! ! : : ; : ; cat really
