Stage ?

Challenge Description

Yes they ran windows machines in WHAMazon ⚠️

Flag: Raptor{WinD0wSS_Sm4shiNg_PS_Cr4shIng}

Provided: stage1.zip → stage1.ps1

Layer 1: The Outer Script

The .ps1 contains a single line:

Invoke-Command -ScriptBlock (
  [scriptblock]::Create(
    [System.Text.Encoding]::Unicode.GetString(
      [System.Convert]::FromBase64String('c l E a r - h O S t  
  
 f u n c t i o n   S H O W - B A n n E R   {  
         w r i t e   ' '  
         w r i t e   ( [ S y s t e m . T e x t . E n c o d i n g ] : : U T F 8 . G e t S t r i n g ( [ S y s t e m . C o n v e r t ] : : F r o m B a s e 6 4 S t r i n g ( ' P T 0 9 P T 0 9 P T 0 9 P T 0 9 P T 0 9 P T 0 9 P T 0 9 P T 0 9 P T 0 9 P T 0 9 P T 0 9 P T 0 9 P T 0 9 ' ) ) )  
         w r i t e   ( - j o i n ( [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 5 2 ,   [ c h a r ] 0 x 4 1 ,   [ c h a r ] 0 x 5 0 ,   [ c h a r ] 0 x 5 4 ,   [ c h a r ] 0 x 4 F ,   [ c h a r ] 0 x 5 2 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 5 7 ,   [ c h a r ] 0 x 4 9 ,   [ c h a r ] 0 x 4 E ,   [ c h a r ] 0 x 4 4 ,   [ c h a r ] 0 x 4 F ,   [ c h a r ] 0 x 5 7 ,   [ c h a r ] 0 x 5 3 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 5 0 ,   [ c h a r ] 0 x 4 F ,   [ c h a r ] 0 x 5 7 ,   [ c h a r ] 0 x 4 5 ,   [ c h a r ] 0 x 5 2 ,   [ c h a r ] 0 x 5 3 ,   [ c h a r ] 0 x 4 8 ,   [ c h a r ] 0 x 4 5 ,   [ c h a r ] 0 x 4 C ,   [ c h a r ] 0 x 4 C ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 5 4 ,   [ c h a r ] 0 x 4 F ,   [ c h a r ] 0 x 4 F ,   [ c h a r ] 0 x 4 C ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 2 0 ) )  
         w r i t e   ' =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  =  '  
         w r i t e   ' '  
 }  
  
 f u n c t i o n   s h O W - m E n U   {  
         w r i t e   ( $ ( 9 2   - b x o r   9 3 )   +   ( [ S y s t e m . T e x t . E n c o d i n g ] : : U T F 8 . G e t S t r i n g ( [ S y s t e m . C o n v e r t ] : : F r o m B a s e 6 4 S t r i n g ( ' K S B T e X N 0 Z W 0 g S W 5 m b w = = ' ) ) ) )  
         w r i t e   ( $ ( 9 5   - b x o r   9 3 )   +   ( - j o i n ( [ c h a r ] 0 x 2 9 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 4 6 ,   [ c h a r ] 0 x 6 1 ,   [ c h a r ] 0 x 6 B ,   [ c h a r ] 0 x 6 5 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 4 4 ,   [ c h a r ] 0 x 6 9 ,   [ c h a r ] 0 x 6 1 ,   [ c h a r ] 0 x 6 7 ,   [ c h a r ] 0 x 6 E ,   [ c h a r ] 0 x 6 F ,   [ c h a r ] 0 x 7 3 ,   [ c h a r ] 0 x 7 4 ,   [ c h a r ] 0 x 6 9 ,   [ c h a r ] 0 x 6 3 ,   [ c h a r ] 0 x 7 3 ) ) )  
         w r i t e   ( $ ( 6 8   - b x o r   7 1 )   +   $ ( $ k 1 4 9 7 = ' F y y j C o C < N 7 # g > N ' ; $ b = [ b y t e [ ] ] ( 0 x 6 F , 0 x 5 9 , 0 x 2 B , 0 x 0 F , 0 x 3 5 , 0 x 0 A , 0 x 2 2 , 0 x 5 0 , 0 x 6 E , 0 x 7 1 , 0 x 4 F , 0 x 0 6 , 0 x 5 9 ) ; $ k b = [ S y s t e m . T e x t . E n c o d i n g ] : : U T F 8 . G e t B y t e s ( $ k 1 4 9 7 ) ; - j o i n ( 0 . . ( $ b . L e n g t h - 1 ) | % { [ c h a r ] ( $ b [ $ _ ] - b x o r $ k b [ $ _ % $ k b . L e n g t h ] ) } ) ) )  
         w r i t e   ( $ ( 1 4 0   /   3 5 )   +   ( [ S y s t e m . T e x t . E n c o d i n g ] : : U T F 8 . G e t S t r i n g ( [ S y s t e m . C o n v e r t ] : : F r o m B a s e 6 4 S t r i n g ( ' K S B F e G l 0 ' ) ) ) )  
         w r i t e   ' '  
 }  
  
 f u n c t i o n   G e t - s y S t E M I N F o   {  
         w r i t e   ( - j o i n ( ' ` ` n [ + ]   ' , ' G a t ' , ' h ' , ' e r i n g   s ' , ' y s t ' , ' e m   i n f ' , ' o . . . ` ` n ' ) )  
         g E t - C o m P U T e r i N f o   |   s e l e c t   O s n a M E ,   o s v E r S i O n ,   c s n A M E  
 }  
  
 i f   ( 2 8   - g t   6 )   {   W r i t e - H o s t   " . "   - N o N e w l i n e   }   e l s e   {   W r i t e - H o s t   " , "   - N o N e w l i n e   } ;   W r i t e - H o s t   " " 
 f u n c t i o n   r u n - d I a g n O S T I c s   {  
         w r i t e   ( - j o i n ( ' ` ` n [ + ]   ' , ' R u n n i n g ' , '   d i a g ' , ' n o s t i c s . ' , ' . ' , ' . ' ) )  
         s t a r t - s L e e p   ( 3 4   /   3 4 )  
         w r i t e   ( - j o i n ( [ c h a r ] 0 x 5 B ,   [ c h a r ] 0 x 2 B ,   [ c h a r ] 0 x 5 D ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 4 3 ,   [ c h a r ] 0 x 6 8 ,   [ c h a r ] 0 x 6 5 ,   [ c h a r ] 0 x 6 3 ,   [ c h a r ] 0 x 6 B ,   [ c h a r ] 0 x 6 9 ,   [ c h a r ] 0 x 6 E ,   [ c h a r ] 0 x 6 7 ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 6 D ,   [ c h a r ] 0 x 6 5 ,   [ c h a r ] 0 x 6 D ,   [ c h a r ] 0 x 6 F ,   [ c h a r ] 0 x 7 2 ,   [ c h a r ] 0 x 7 9 ,   [ c h a r ] 0 x 2 E ,   [ c h a r ] 0 x 2 E ,   [ c h a r ] 0 x 2 E ,   [ c h a r ] 0 x 2 0 ,   [ c h a r ] 0 x 4 F ,   [ c h a r ] 0 x 4 B ) )  
         s T A r T - s l e e P   ( 6 2   +   - 6 1 )  
         w r i t e   ( ' [ + ]   C h e ' + ' c k i n ' + ' g   d i s ' + ' k . . .   ' + ' O K ' )  
         s t a r T - s L e E P   ( - 1 5   - b x o r   - 1 6 )  
         w r i t e   ( ' [ ' + ' + ] ' + '   C ' + ' h e c ' + ' k i n ' + ' g   s e r ' + ' v i c e ' + ' s . . .   O ' + ' K ' )  
         w r i t e   $ ( - j o i n ( ' ` ` x K v v   c i c d o w c   x y w s x k v . ` ` x ' . T o C h a r A r r a y ( ) | % { [ i n t ] $ c = $ _ ; i f ( $ c - g e 6 5 - a n d $ c - l e 9 0 ) { [ c h a r ] ( 6 5 + ( ( $ c - 6 5 + 1 6 ) % 2 6 ) ) } e l s e i f ( $ c - g e 9 7 - a n d $ c - l e 1 2 2 ) { [ c h a r ] ( 9 7 + ( ( $ c - 9 7 + 1 6 ) % 2 6 ) ) } e l s e { [ c h a r ] $ c } } ) )  
 }  
  
 f u n c t i o n   r e V E a L - F l A G   {  
         $ E n c O d E D   =   ( ' U m F ' + ' w d G 9 y e 1 d ' + ' p b ' + ' k Q w d 1 N T ' + ' X 1 N t N H N ' + ' o a U 5 n X 1 B ' + ' T X 0 N y N H N ' + ' o S W 5 ' + ' n f ' + ' Q ' + ' = = ' )  
         $ b y t E s   =   [ s y s T e m . c O N V e R t ] : : F r o M B A S e 6 4 s t r I N G ( $ E N C o D e d )  
         $ f l a g   =   [ S Y S T e m . t e X T . e n C o d i n g ] : : u t f 8 . G E T S T r I n G ( $ B y t e S )  
  
         w r i t e   ' '  
         w r i t e   ( ' { 0 } { 1 } { 2 } { 3 } { 4 } { 5 } { 6 } { 7 } { 8 } { 9 } { 1 0 } { 1 1 } { 1 2 } '   - f   ' = = = ' , ' = = ' , ' = = = ' , ' = = = = ' , ' = = ' , ' = =   F ' , ' L A G ' , '   ' , ' = = = = ' , ' = = = ' , ' = = = = ' , ' = = = ' , ' = = = ' )  
         w r i t e   $ f l A G  
         w r i t e   ( [ s t r i n g ] : : F o r m a t ( ' { 0 } { 1 } { 2 } { 3 } { 4 } { 5 } { 6 } { 7 } { 8 } { 9 } { 1 0 } { 1 1 } { 1 2 } { 1 3 } { 1 4 } ' , ' = = = ' , ' = = = ' , ' = ' , ' = ' , ' = = = ' , ' = = = = ' , ' = = = = = ' , ' = = ' , ' = = = = = ' , ' = = = = = ' , ' = ' , ' = ' , ' = = ' , ' = ' , ' = ' ) )  
         w r i t e   ' '  
 }  
 i f   ( $ f a l s e )   { 
         $ c o n f i g T a b l e   =   @ {   S e t t i n g 1   =   ' V a l u e A ' ;   S e t t i n g 2   =   ( G e t - R a n d o m ) ;   T i m e o u t   =   8 1   } ;   $ c o n f i g T a b l e . K e y s   |   F o r E a c h - O b j e c t   {   W r i t e - V e r b o s e   " C o n f i g   K e y :   $ _ ,   V a l u e :   $ ( $ c o n f i g T a b l e [ $ _ ] ) "   } 
 } 
  
 s H O w - b a N n E r  
  
 w h i l e   ( ( ' E'   - e q   ( [ S y s t e m . T e x t . E n c o d i n g ] : : U T F 8 . G e t S t r i n g ( [ b y t e [ ] ] ( 0 x 7 8 ) ) ) ) )   {  
         S H o W - M e N U  
         $ C H O i C E   =   r e A D - H O s T   ' S 5l 5At   >@t V>n '  
  
         s w i t c h   ( $ c h o I C E )   {  
                 $ ( 7 7   - b x o r   7 6 )   {   G e t - s y s T e m I N F o   }  
                 $ ( 3 0   /   1 5 )   {   R U n - D I a G n o s t i c s   }  
                 $ ( - 6 3   - b x o r   - 6 2 )   {   r e v e a L - F L A G   }  
                 $ ( 1 4   - b x o r   1 0 )   {   b r e a k   }  
                 d E f A U l T   {   w r i t e   ( [ S y s t e m . T e x t . E n c o d i n g ] : : U T F 8 . G e t S t r i n g ( [ S y s t e m . C o n v e r t ] : : F r o m B a s e 6 4 S t r i n g ( ' S W 5 2 Y W x p Z C B v c H R p b 2 4 u ' ) ) )   }  
         }  
  
         w r i t e   ' '  
         r E a d - h O S T   " $ ( [ c h a r ] 0 x 5 0 ) $ ( [ c h a r ] 0 x 7 2 ) $ ( [ c h a r ] 0 x 6 5 ) $ ( [ c h a r ] 0 x 7 3 ) $ ( [ c h a r ] 0 x 7 3 ) $ ( [ c h a r ] 0 x 2 0 ) $ ( [ c h a r ] 0 x 4 5 ) $ ( [ c h a r ] 0 x 6 E ) $ ( [ c h a r ] 0 x 7 4 ) $ ( [ c h a r ] 0 x 6 5 ) $ ( [ c h a r ] 0 x 7 2 ) $ ( [ c h a r ] 0 x 2 0 ) $ ( [ c h a r ] 0 x 7 4 ) $ ( [ c h a r ] 0 x 6 F ) $ ( [ c h a r ] 0 x 2 0 ) $ ( [ c h a r ] 0 x 6 3 ) $ ( [ c h a r ] 0 x 6 F ) $ ( [ c h a r ] 0 x 6 E ) $ ( [ c h a r ] 0 x 7 4 ) $ ( [ c h a r ] 0 x 6 9 ) $ ( [ c h a r ] 0 x 6 E ) $ ( [ c h a r ] 0 x 7 5 ) $ ( [ c h a r ] 0 x 6 5 ) "  
         C l E A r - H o s t  
         S h O w - B a N n E r  
 }  
  
 w r i t e   ( [ S y s t e m . T e x t . E n c o d i n g ] : : U T F 8 . G e t S t r i n g ( [ S y s t e m . C o n v e r t ] : : F r o m B a s e 6 4 S t r i n g ( ' Y G B u R 2 9 v Z G J 5 Z S 4 = ' ) ) )  ')
    )
  )
)

This is a standard PowerShell obfuscation pattern, the entire script body is base64-encoded, decoded at runtime to a string, compiled into a scriptblock, and executed. Decoding the base64 (as Unicode, not UTF-8, note the ::Unicode call) reveals the actual script.

Layer 2: The Inner Script

Inside the decoded script, a switch statement uses obfuscated arithmetic to mask its case values:

switch ($choICE) {
    $(77 -bxor 76)  { Get-sysTemINFo }   # = 1
    $(30 / 15)      { RUn-DIaGnostics }  # = 2
    $(-63 -bxor -62){ reveaL-FLAG }      # = 1 (same as XOR above, both resolve to 1)
    $(14 -bxor 10)  { break }            # = 4
    dEfAUlT         { write "Invalid option." }
}

The arithmetic obfuscation (-bxor, /) evaluates at runtime but is trivially readable statically. Following reveaL-FLAG (however it's reached) leads to the flag function.

Layer 3: The Flag Function

function reVEaL-FlAG {
    $EncOdED = ('UmF'+'wdG9ye1d'+'pb'+'kQwd1NT'+'X1NtNHN'+'oaU5nX1B'+'TX0NyNHN'+'oSW5'+'nf'+'Q'+'==')

    $bytEs = [sysTem.cONVeRt]::FroMBASe64strING($ENCoDed)
    $flag  = [SYSTem.teXT.enCoding]::utf8.GETSTrInG($ByteS)

    write $flAG
}

The flag is base64-encoded and split across concatenated string fragments , the same technique seen in the James Smith JS challenge. Joining and decoding:

UmFwdG9ye1dpbkQwd1NTX1NtNHNoaU5nX1BTX0NyNHNoSW5nfQ==
→ Raptor{WinD0wSS_Sm4shiNg_PS_Cr4shIng}

PowerShell Obfuscation Patterns Used

This script stacked three common techniques:

1. Base64 + Unicode encoding: wrapping the entire script in FromBase64String + ::Unicode hides the content from casual inspection and evades simple string-based AV signatures.

2. Case randomization: reVEaL-FlAG, sysTem.cONVeRt, GETSTrInG. PowerShell is case-insensitive, so this has zero effect on execution but makes the code harder to read and breaks naive pattern matching.

3. String concatenation and arithmetic obfuscation: splitting base64 strings across + expressions and replacing literal case values with evaluated expressions (77 -bxor 76) obscures the logic without changing it.

None of these are cryptographic, they're all reversible with static analysis. The approach is the same regardless of language: decode the outermost layer, read what's inside, repeat until you hit plaintext.

Key Takeaways

PowerShell deobfuscation is Rev, just with a scripting language instead of a compiled binary. The layers here were shallow enough for manual analysis, in more aggressive real-world samples, tools like PSDecode or PowerShell ISE with breakpoints can handle deeper nesting. When layers get truly complex, letting the script decode itself in a sandboxed environment and capturing the final scriptblock before execution is often faster than manual unwrapping.