逆向世界盃直播App 央視影音-iOS客戶端

寫在前面的話 羅列下本次逆向要使用的幾個工具

• MonkeyDev 或者IPAPatch
• HookZz

事情起源

• 最近我的朋友圈充滿了世界盃！幾乎每個偽球迷都在刷直播世界盃！還有熱心的朋友發出了世界盃直播的App(央視影音 iOS)連結！點進去看了一下，但是看直播之前需要先看長達60秒的廣告。作為iOS逆向愛好者，決定為廣大球迷做點兒力所能及的事情----那就是去掉廣告

• 帶60廣告的證據圖

下面簡單說下逆向過程和思路

思路

• 因為只是給央視影音App去廣告!所以思路很簡單(把廣告相關的物件置為空即可)

逆向過程

第一步 動態分析

• 使用HookZZ的objc_msgSend模組 列印函式呼叫
• 只關注Ad開頭的類
• 下面是相關程式碼

void objc_msgSend_pre_call(RegState *rs, ThreadStackPublic *ts, CallStackPublic *cs, const HookEntryInfo *info) {
    char *selector = (char *)rs->ZREG(1);
    id tmpObject = (id)rs->ZREG(0);
    Class tmpClass  = object_getClass(tmpObject);
   
    if (!tmpClass)
        return;
    const char *className               = class_getName(tmpClass);
    
    if (!strstr(className, "Ad") && !strstr(className, "Home")) {
        return;
    }
    
    memset(decollators, '-', 512);
    if (ts->size * 3 >= 512)
        return;
    decollators[ts->size * 3] = '\0';
    
    printf("[OCMethodMonitor|%ld] %s [%s %s]\n", ts->thread_id, decollators, className, selector);
}
複製程式碼

• 簡單展示下這個HookZz的objc_msgSend模組列印出來的內容
  • CNAdPlayerView

[OCMethodMonitor|7341845312] --- [CNAdPlayerView beatHandleForTime:]
[OCMethodMonitor|7341845312] ------ [CNAdPlayerView adTime]
[OCMethodMonitor|7341845312] ------ [CNAdPlayerView setSurplusSec:]
[OCMethodMonitor|7341845312] --------- [CNAdPlayerView adPlayerUIKit]
[OCMethodMonitor|7341845312] ------ [CNAdPlayerView queuePlayer]
[OCMethodMonitor|7341845312] ------ [CNAdPlayerView indexForPlayerItem:]
[OCMethodMonitor|7341845312] --------- [CNAdPlayerView playItems]
[OCMethodMonitor|7341845312] --------- [CNAdPlayerView playItems]
[OCMethodMonitor|7341845312] ------ [CNAdPlayerView playerEventType:value:]
[OCMethodMonitor|7341845312] --------- [CNAdPlayerView delegate]
[OCMethodMonitor|7341845312] --------- [CNAdPlayerView delegate]
[OCMethodMonitor|7341845312] --------- [CNAdPlayerView delegate]
[OCMethodMonitor|7341845312] ------ [CNAdPlayerView playDelayTime]
[OCMethodMonitor|7341845312] --------- [CNAdPlayerView adPlaying]
[OCMethodMonitor|7341845312] --------- [CNAdPlayerView adTimeout]
複製程式碼

• • AdsameBannerView

[OCMethodMonitor|7341845312] ------------ [AdsameBannerView alloc]
[OCMethodMonitor|7341845312] ------------ [AdsameBannerView initWithFrame:]
[OCMethodMonitor|7341845312] --------------- [AdsameBannerView setClipsToBounds:]
[OCMethodMonitor|7341845312] --------------- [AdsameBannerView setSlotStr:]
[OCMethodMonitor|7341845312] --------------- [AdsameCubeMaxSDK sharedSDK]
[OCMethodMonitor|7341845312] --------------- [AdsameCubeMaxSDK def_volume]
[OCMethodMonitor|7341845312] --------------- [AdsameCubeMaxSDK sharedSDK]
[OCMethodMonitor|7341845312] --------------- [AdsameCubeMaxSDK m_isMute]
[OCMethodMonitor|7341845312] --------------- [AdsameBannerView setIsOrderedBannerPaused:]
[OCMethodMonitor|7341845312] ------------ [AdsameBannerView setIsUsingCache:]
[OCMethodMonitor|7341845312] ------------ [AdsameBannerView setCId:]
[OCMethodMonitor|7341845312] ------------ [AdsameBannerView setSlotStr:]
[OCMethodMonitor|7341845312] ------------ [AdsameBannerView setIsUserExposure:]
[OCMethodMonitor|7341845312] ------------ [AdsameBannerView setParentSDK:]
[OCMethodMonitor|7341845312] ------------ [AdsameBannerView setDelegateBanner:]
[OCMethodMonitor|7341845312] ------------ [AdsameBannerView setIsRetina:]

複製程式碼

• 還有其它一些帶Ad的類就不一一列舉了

第二步 編寫hook程式碼

• 按照之前的思路把Ad相關的類的初始化程式碼返回nil

// See http://iphonedevwiki.net/index.php/Logos

#import <UIKit/UIKit.h>

//AdsameBannerView

%hook AdsameBannerView
- (AdsameBannerView*)initWithFrame:(id)arg1{
	return nil;
}
%end

%hook CNAdPlayerView

-(CNAdPlayerView*)initWithFrame:(id)arg1{
	return nil;
}
%end

%hook CNADPlayerUIKit
-(CNADPlayerUIKit *)initWithFrame:(id)arg1{
	return nil;
}
%end

%hook AdMasterMobileTracking
+(id)sharedInstance{
	return nil;
}
-(AdMasterMobileTracking*)init
{
	%log;
	return nil;
}
%end


複製程式碼

第三步 打包重籤

• MonkeyDev 或者 IPAPatch 用的第一個，第二個也是可以的

最後再附上去掉廣告的IPA連結（）

yuzhouheike.0a6j.cn/YSYY.ipa

git原始碼 https://github.com/yuzhouheike/HookZz-Learn

最後的最後

• 感謝您在百忙之中看我的文章

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