hfiref0x

typedef interface IEditionUpgradeManager IEditionUpgradeManager;

typedef struct IEditionUpgradeManagerVtbl {

    BEGIN_INTERFACE

    HRESULT(STDMETHODCALLTYPE *QueryInterface)(
        __RPC__in IEditionUpgradeManager * This,
        __RPC__in REFIID riid,

saelo

Dezhou Instrumentz

The challenge consisted of an iOS app (Calc.app) which implemented a simple calculator. Moreover, the app also registered a custom URL scheme (icalc://) which would simply evaluate the content of the URL. The calculator was implemented using NSExpressions and the input string would simply be parsed as such an expression and executed. NSExpressions are pretty powerful and allow for example calls to ObjC Methods (e.q. typing in sqrt(42) would end up calling +[_NSPredicateUtilities sqrt:@42]). Further, there are two interesting helper functions available in NSExpressions:

FUNCTION(obj, 'foo', "bar")

Which will result in a call of the method 'foo' on object obj with parameter "bar" (an NSString).

infosecn1nja

' ASR rules bypass creating child processes
' https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-exploit-guard/enable-attack-surface-reduction
' https://www.darkoperator.com/blog/2017/11/11/windows-defender-exploit-guard-asr-rules-for-office
' https://www.darkoperator.com/blog/2017/11/6/windows-defender-exploit-guard-asr-vbscriptjs-rule

Sub ASR_blocked()
    Dim WSHShell As Object
    Set WSHShell = CreateObject("Wscript.Shell")
    WSHShell.Run "cmd.exe"
End Sub

AhnMo

#include <windows.h>
#include <wininet.h>
#include <stdio.h>

#pragma comment (lib, "Wininet.lib")

int main(int argc, char *argv[]) {

	HINTERNET hSession = InternetOpen(
		L"Mozilla/5.0", // User-Agent

lucasg

#include <windows.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <sal.h>
#include <assert.h>

#ifdef _X86_
#error "This snippet only build in 64-bit due to heavy use of uintptr arithmetics."
#endif

Cr4sh

#include "stdafx.h"

#define DB(_val_) __asm __emit (_val_)

#define INVALID_SYSCALL (DWORD)(-1)

// code selectors
#define CS_32   0x23
#define CS_64   0x33

martok

unit SystemExceptionHandling;

// Inspired by what is described at FPC's forums:
// http://bugs.freepascal.org/view.php?id=12974 [^]
//
// especially in comment 0040683 by Bernd Kreuss

{$mode objfpc}{$H+}
{$AsmMode intel}