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某手游xqtd的简单分析

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作者：int3-cc   
闲着没事，看到有新游出来，于是简单的分析学习一下。
由于时间和水平有限，本文会存在诸多不足，欢迎补充指正。
样本：xqtd
加固：mtp
工具：ida、010、jadx、frida
libtprt.so简单处理
寄存器间接跳转
  • 第一种，流程很清晰，比较好处理



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  • ida脚本，如遇到报错需要修改脚本

    import idautils
    import idc
    import idaapi
    import ida_ua
    from keystone import *
    g_reg = [0] * 40
    reg_base = 129
    g_cond_info = list()
    ldr_reg = -1
    add_reg = -1
    ks = keystone.Ks(keystone.KS_ARCH_ARM64, keystone.KS_MODE_LITTLE_ENDIAN)
    def get_opcode(ea):
        opcode = None
        disasm = idc.GetDisasm(ea)
        if disasm.find('LT') != -1:
            opcode = 'blt'
        elif disasm.find('EQ') != -1:
            opcode = 'beq'
        elif disasm.find('CC') != -1:
            opcode = 'bcc'
        elif disasm.find('GT') != -1:
            opcode = 'bgt'
        elif disasm.find('NE') != -1:
            opcode = 'bne'  
        elif disasm.find('GE') != -1:
            opcode = 'bge'  
        elif disasm.find('HI') != -1:
            opcode = 'bhi'  
        return opcode
    def do_patch(patch_1, patch_2, opcode, cond_jmp_addr, uncond_jmp_addr):
        print("patch_1=0x%x patch_1=0x%x opcode=%s cond_jmp_addr=0x%x uncond_jmp_addr=0x%x" % (patch_1, patch_2, opcode, cond_jmp_addr, uncond_jmp_addr))
        jump_offset = " ({:d})".format(cond_jmp_addr - patch_1)
        repair_opcode = opcode + jump_offset
        encoding, count = ks.asm(repair_opcode)
        idaapi.patch_byte(patch_1, encoding[0])
        idaapi.patch_byte(patch_1 + 1, encoding[1])
        idaapi.patch_byte(patch_1 + 2, encoding[2])
        idaapi.patch_byte(patch_1 + 3, encoding[3])
        jump_offset = " ({:d})".format(uncond_jmp_addr - patch_2)
        repair_opcode = 'b' + jump_offset
        encoding, count = ks.asm(repair_opcode)
        idaapi.patch_byte(patch_2, encoding[0])
        idaapi.patch_byte(patch_2 + 1, encoding[1])
        idaapi.patch_byte(patch_2 + 2, encoding[2])
        idaapi.patch_byte(patch_2 + 3, encoding[3])
    def do_deobf(ea):
        # 获取跳转条件
        opcode = get_opcode(ea)
        if opcode is None:
            print("opcode:unknown opcode 0x%x" % ea)
            return ea
        # 获取跳转信息
        cond_reg = -1
        uncond_reg = -1
        cond_data = -1
        uncond_data = -1
        mnem = idc.ida_ua.ua_mnem(ea)
        if mnem == 'CSEL':
            cond_reg = idc.get_operand_value(ea, 1)
            uncond_reg = idc.get_operand_value(ea, 2)
        elif mnem == 'CSET':
            cond_data = 1
            uncond_data = 0
        ea = idc.next_head(ea)
        # 获取LDR寄存器
        ldr_reg = -1
        lsl_value = -1
        mnem = idc.ida_ua.ua_mnem(ea)
        if mnem == 'LSL':
            lsl_value = idc.get_operand_value(ea, 2)
            ea = idc.next_head(ea)
            mnem = idc.ida_ua.ua_mnem(ea)
        if mnem != 'LDR':
            print("LDR:0x%x -> %s" % (ea, mnem))
            return ea
        operand_type = idc.get_operand_type(ea, 1)
        if operand_type == idc.o_phrase:
            insn = ida_ua.insn_t()
            ida_ua.decode_insn(insn, ea)
            ldr_reg = insn.Op2.reg
            if lsl_value == -1:
                lsl_value = insn.Op2.value
        else:
            return ea
        ea = idc.next_head(ea)
        # 获取ADD寄存器
        mnem = idc.ida_ua.ua_mnem(ea)
        if mnem == 'MOV':
            ea = idc.next_head(ea)
            mnem = idc.ida_ua.ua_mnem(ea)
        if mnem != 'ADD':
            print("ADD:0x%x -> %s" % (ea, mnem))
            return ea
        op_3 = idc.print_operand(ea, 2)
        op_3 = op_3[1:]
        ea = idc.next_head(ea)
        # 进行patch
        mnem = idc.ida_ua.ua_mnem(ea)
        if mnem != 'BR':
            print("BR:0x%x -> %s" % (ea, mnem))
            return ea
        #print('1 = %d 2 = %d 3 = 0x%x' % (g_reg[ldr_reg - reg_base],  g_reg[cond_reg - reg_base], g_reg[int(op_3)]))
        if cond_data != -1 and uncond_data != -1:
            print(lsl_value)
            cond_jmp_addr  = (idc.get_qword(g_reg[ldr_reg - reg_base] + (cond_data

  • 处理前


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  • 处理后


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  • 第二种，有点像做了流水线优化，不太好处理

  • 观察发现存在这种间接跳转的方法，其方法的流程并不复杂，将各种跳转patch掉即可


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    字符串解密
  • libtprt.so中，部分字符串的解密，都是同一个算法，写了个简单脚本
  • libtersafe2.so中其实也是一样的

    import idautils
    import idc
    import idaapi
    decrypt_fun_list = dict()
    def get_code_refs_to_list(addr):
        result = list(idautils.CodeRefsTo(addr, True))
        return result
    def do_decrypt(src_addr, dst_addr, offset, eor_data, add_data, call_addr):
        flag = idc.get_wide_byte(src_addr)
        str_len = flag ^ (idc.get_wide_byte(src_addr + 1))
        final_str = ''
        for i in range(str_len):
            v4 = idc.get_wide_byte(src_addr + 2 + i)
            v5 = (flag + i) ^ eor_data
            final_str += chr((v4 ^ flag) & 0xff)
            flag = v5 + add_data
        decrypt_fun_list[call_addr] = final_str + "  " + str(hex(offset))
        print('decrypt_addr=0x%x offset=0x%x, final_str=%s' % (call_addr, offset, final_str))
    def decrpt_str():
        decrypt_fun_list.clear()
        tmp_list = [7, 6, 5, 4, 3, 2, 1]
        fun_list = get_code_refs_to_list(0x106C54)
        if not fun_list:
            return
        for i in range(len(fun_list)):
            call_addr = fun_list
            call_addr_start = idc.get_func_attr(call_addr, idc.FUNCATTR_START)
            caller_fun_list = get_code_refs_to_list(call_addr_start)
            for j in range(len(caller_fun_list)):
                call_decryptStr_addr = caller_fun_list[j]
                arg_addr = idc.prev_head(call_decryptStr_addr)
                mnem = idc.ida_ua.ua_mnem(arg_addr)
                register = idc.get_operand_value(arg_addr, 0)
                while True:
                    if (register == 129) and (mnem == 'MOV'):
                        break
                    arg_addr = idc.prev_head(arg_addr)
                    mnem = idc.ida_ua.ua_mnem(arg_addr)
                    register = idc.get_operand_value(arg_addr, 0)     
                offset = idc.get_operand_value(arg_addr, 1)
                if offset == 0xa0:
                    offset = 0
                src_addr = 0x1250D8 + offset
                dst_addr = 0x15E778 + offset
                index = offset % 100
                eor_data = index
                add_data = tmp_list[(index % 7)]
                do_decrypt(src_addr, dst_addr, offset, eor_data, add_data, call_decryptStr_addr)
        pass
    def main():
        decrpt_str()
    if __name__ == "__main__":
        main()
  • 解密结果，还是暴露了不少关键信息的


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    ollvm混淆
  • 不算太严重，不是很影响分析，也就没有处理，将就着看了

    libtprt.so检测
    hook检测
  • 在0xB1484中会对代码段计算crc32并进行比较
  • 从0x5e0f0到0x11fb90，大小0xc1aa0
  • 修改返回结果为0来过掉检测
  • 在sub_9AAFC中获取linker64的路径，通过解析文件格式获取符号的地址
  • 在方法sub_F5AC0:对文件中和内存中方法的前32个字节进行比较
  • 获取的符号如下


    __loader_dlopen
    __loader_android_dlopen_ext
    rtld_db_dlactivity          //在非调试模式下为空函数，如果程序被调试则会被修改为对应的断点指令
  • 在方法sub_B4BC0反射调用来了findClass

    cc/binmt/signature/PmsHookApplication
    com/cloudinject/feature/App
    np/manager/FuckSign
    bin/mt/apksignaturekillerplus/HookApplication
    emulator检测
  • 在sub_F19B0访问目标文件

    /init.vbox86.rc
    /dev/socket/genyd
    /data/data/com.tencent.tinput
    init.android_x86.rc
    ueventd.android_x86.rc
    /system/framework/x86
    Seccomp-BPF检测
  • 在sub_AA338打开了/proc/self/status，获取了Seccomp对应的值
  • 其中sub_A9EB0方法返回值即Seccomp对应的值

    debugger检测

  • 在方法sub_DCCE8反射获取ADB_ENABLED

  • 在方法sub_DD468反射获取android.hardware.usb.action.USB_STATE

  • 在方法sub_98B34遍历maps查找libjdwp.so

  • 在方法sub_985D4反射调用isDebuggerConnected

  • 在方法sub_9843C使用socket连接了127.0.0.1:23946

  • 在方法sub_F0DAC打开了/proc/%d/status，获取了TracerPid

  • 在方法sub_9BE6C中创建了线程，并调用gettimeofday获取了线程创建前后的时间差

    frida检测

  • 在方法sub_98B34遍历maps查找frida-gadget、frida-agent

  • 在方法sub_994A8使用socket连接了127.0.0.1:27402

  • 使用strong-frida编译修改的frida，需要修改对应的端口

  • 同时，在frida中，将对应的hook检测过掉，就可以正常的对libtprt.so进行hook

    libtersafe2.so的简单分析
    字符串解密
  • 和上面一样

    import idautils
    import idc
    import idaapi
    decrypt_fun_list = dict()
    def get_code_refs_to_list(addr):
        result = list(idautils.CodeRefsTo(addr, True))
        return result
    def do_decrypt(src_addr, dst_addr, offset, eor_data, add_data, call_addr):
        flag = idc.get_wide_byte(src_addr)
        str_len = flag ^ (idc.get_wide_byte(src_addr + 1))
        final_str = ''
        for i in range(str_len):
            v10 = idc.get_wide_byte(src_addr + 2 + i) ^ flag
            flag = ((i + flag) ^ eor_data) + add_data
            final_str += chr(v10 & 0xff)
        decrypt_fun_list[call_addr] = final_str + "  " + str(hex(offset))
        print('call_addr=0x%x, offset=0x%x, eor_data=0x%x, add_data=0x%x, final_str=%s' % (call_addr, offset, eor_data, add_data, final_str))
    def decrpt_str():
        decrypt_fun_list.clear()
        tmp_list = [7, 6, 5, 4, 3, 2, 1]
        fun_list = get_code_refs_to_list(0x27E724)
        if not fun_list:
            return
        for i in range(len(fun_list)):
            arg_addr = fun_list
            call_addr = arg_addr
            fun_start = idc.get_func_attr(arg_addr, idc.FUNCATTR_START)
            mnem = idc.ida_ua.ua_mnem(arg_addr)
            register = idc.get_operand_value(arg_addr, 0)
            while arg_addr >= fun_start:
                if (register == 129) and (mnem == 'MOV'):
                    offset = idc.get_operand_value(arg_addr, 1)
                    break
                arg_addr = idc.prev_head(arg_addr)
                mnem = idc.ida_ua.ua_mnem(arg_addr)
                register = idc.get_operand_value(arg_addr, 0)
            if offset == 0xa0:
                offset = 0
            index = offset % 100
            eor_data = index
            add_data = tmp_list[(index % 7)]
            # src = 0x3880E4 dst = 0x4C9B78
            src_addr = 0x3880E4 + offset
            dst_addr = 0x4C9B78 + offset
            do_decrypt(src_addr, dst_addr, offset, eor_data, add_data, call_addr)
    def main():
        decrpt_str()
    if __name__ == "__main__":
        main()
  • 字符串暴露出了很多关键信息


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    相关的检测和脚本
  • 在方法sub_26A218进行脚本方法的初始化

    __int64 __fastcall sub_26A218(__int64 result)
    {
      v1 = result;
      if ( !*(_QWORD *)(result + 8) )
      {
        v11 = sub_27E724(0x1ADE);
        v12 = 0;
        v13[0] = (__int64)sub_26E5D8;
        v13[1] = sub_27E724(0x1AEB);
        v14 = 0;
        v15 = sub_26E644;
        v16 = sub_27E724(0x1AF9);
        v17 = 0;
        v18 = sub_26E700;
        v19 = sub_27E724(0x147E);
        v20 = 13;
        v21 = sub_26B698;
        v22 = sub_27E724(5260);
        v23 = 11;
        v24 = sub_26B398;
        v25 = sub_27E724(5266);
        v26 = 4;
        v27 = sub_26B714;
        v28 = sub_27E724(5276);
        v29 = 4;
        v30 = sub_26B748;
        v31 = sub_27E724(5286);
        v32 = 2;
        v33 = sub_26B76C;
        v34 = sub_27E724(5299);
        v35 = 3;
        v36 = sub_26B79C;
        v37 = sub_27E724(5312);
        v38 = 3;
        v39 = &sub_26B824;
        v40 = sub_27E724(5322);
        v41 = 14;
        v42 = sub_26CC04;
        v43 = sub_27E724(5330);
        v44 = 3;
        v45 = &sub_26B8A0;
        v46 = sub_27E724(5341);
        v47 = 3;
        v48 = sub_26B918;
        v49 = sub_27E724(5356);
        v50 = 5;
        v51 = sub_26BB7C;
        v52 = sub_27E724(5370);
        v53 = 3;
        v54 = sub_26BACC;
        v55 = sub_27E724(5384);
        v56 = 4;
        v57 = sub_26BD10;
        v58 = sub_27E724(5398);
        v59 = 4;
        v60 = sub_26BDE8;
        v61 = sub_27E724(5413);
        v62 = 5;
        v63 = sub_26BEBC;
        v64 = sub_27E724(5428);
        v65 = 5;
        v66 = sub_26BF74;
        v67 = sub_27E724(5443);
        v68 = 5;
        v69 = sub_26C02C;
        v70 = sub_27E724(5458);
        v71 = 2;
        v72 = sub_26C0E4;
        v73 = sub_27E724(5465);
        v74 = 3;
        v75 = sub_26C128;
        v76 = sub_27E724(5478);
        v77 = 3;
        v78 = sub_26C208;
        v79 = sub_27E724(5491);
        v80 = 3;
        v81 = sub_26C1C8;
        v82 = sub_27E724(5504);
        v83 = 3;
        v84 = sub_26C248;
        v85 = sub_27E724(5521);
        v86 = 3;
        v87 = sub_26C288;
        v88 = sub_27E724(5539);
        v89 = 3;
        v90 = sub_26C338;
        v91 = sub_27E724(5553);
        v92 = 3;
        v93 = sub_26C3AC;
        v94 = sub_27E724(5566);
        v95 = 3;
        v96 = sub_26C45C;
        v97 = sub_27E724(5579);
        v98 = 3;
        v99 = sub_26C404;
        v100 = sub_27E724(5592);
        v101 = 3;
        v102 = sub_26B934;
        v103 = sub_27E724(5605);
        v104 = 3;
        v105 = sub_26B9BC;
        v106 = sub_27E724(5618);
        v107 = 3;
        v108 = sub_26BA44;
        v109 = sub_27E724(5631);
        v110 = 17;
        v111 = sub_26CC54;
        v112 = sub_27E724(5645);
        v113 = 18;
        v114 = sub_26CC98;
        v115 = sub_27E724(5661);
        v116 = 19;
        v117 = sub_26CCF4;
        v118 = sub_27E724(5681);
        v119 = 15;
        v120 = sub_26C4B4;
        v121 = sub_27E724(5700);
        v122 = 20;
        v123 = sub_26CD64;
        v124 = sub_27E724(5713);
        v125 = 3;
        v126 = sub_26CE88;
        v127 = sub_27E724(5730);
        v128 = 3;
        v129 = sub_26CF3C;
        v130 = sub_27E724(0x1678);
        v131 = 3;
        v132 = sub_26CFF0;
        v133 = sub_27E724(5768);
        v134 = 6;
        v135 = sub_26D08C;
        v136 = sub_27E724(5780);
        v137 = 6;
        v138 = sub_26D1C8;
        v139 = sub_27E724(5796);
        v140 = 7;
        v141 = sub_26D334;
        v142 = sub_27E724(5809);
        v143 = 7;
        v144 = sub_26D33C;
        v145 = sub_27E724(6915);
        v146 = 2;
        v147 = sub_26D344;
        v148 = sub_27E724(5826);
        v149 = 2;
        v150 = sub_26D3B8;
        v151 = sub_27E724(5840);
        v152 = 2;
        v153 = sub_26D3E8;
        v154 = sub_27E724(5858);
        v155 = 1;
        v156 = sub_26DA50;
        v157 = sub_27E724(5870);
        v158 = 1;
        v159 = sub_26DA5C;
        v160 = sub_27E724(5882);
        v161 = 7;
        v162 = sub_26DC8C;
        v163 = sub_27E724(5897);
        v164 = 7;
        v165 = sub_26DC94;
        v166 = sub_27E724(5916);
        v167 = 3;
        v168 = sub_26DC9C;
        v169 = sub_27E724(6460);
        v170 = 3;
        v171 = sub_26DCB8;
        v172 = sub_27E724(6669);
        v173 = 1;
        v174 = sub_26C598;
        v175 = sub_27E724(5934);
        v176 = 15;
        v177 = sub_26C5C4;
        v178 = sub_27E724(5949);
        v179 = 7;
        v180 = sub_26E1B0;
        v181 = sub_27E724(5974);
        v182 = 7;
        v183 = sub_26E1B8;
        v184 = sub_27E724(6003);
        v185 = 1;
        v186 = sub_26C5B4;
        v187 = sub_27E724(6012);
        v188 = 1;
        v189 = sub_26C5BC;
        v190 = sub_27E724(6021);
        v191 = 15;
        v192 = sub_26C5DC;
        v193 = sub_27E724(6032);
        v194 = 15;
        v195 = sub_26C660;
        v196 = sub_27E724(6042);
        v197 = 14;
        v198 = sub_26C6E4;
        v199 = sub_27E724(6058);
        v200 = 3;
        v201 = sub_26C780;
        v202 = sub_27E724(6388);
        v203 = 3;
        v204 = sub_26C7D4;
        v205 = sub_27E724(6074);
        v206 = 15;
        v207 = sub_26D418;
        v208 = sub_27E724(6085);
        v209 = 5;
        v210 = sub_26D5AC;
        v211 = sub_27E724(6098);
        v212 = 5;
        v213 = sub_26D5EC;
        v214 = sub_27E724(6115);
        v215 = 5;
        v216 = sub_26D62C;
        v217 = sub_27E724(6129);
        v218 = 5;
        v219 = sub_26D704;
        v220 = sub_27E724(6143);
        v221 = 5;
        v222 = sub_26D6C0;
        v223 = sub_27E724(6157);
        v224 = 3;
        v225 = sub_26D748;
        v226 = sub_27E724(6175);
        v227 = 5;
        v228 = sub_26D870;
        v229 = sub_27E724(6194);
        v230 = 5;
        v231 = sub_26D8B0;
        v232 = sub_27E724(6368);
        v233 = 1;
        v234 = sub_26E1C0;
        v235 = sub_27E724(6378);
        v236 = 2;
        v237 = &sub_26E1D8;
        v238 = sub_27E724(6482);
        v239 = 1;
        v240 = sub_26DE88;
        v241 = sub_27E724(6506);
        v242 = 3;
        v243 = sub_26E264;
        v244 = sub_27E724(6533);
        v245 = 2;
        v246 = &sub_26E360;
        v247 = sub_27E724(6561);
        v248 = 2;
        v249 = &sub_26E3C8;
        v250 = sub_27E724(6590);
        v251 = 1;
        v252 = sub_26E430;
        v253 = sub_27E724(6604);
        v254 = 1;
        v255 = sub_26E438;
        v256 = sub_27E724(6628);
        v257 = 1;
        v258 = sub_26E450;
        v259 = sub_27E724(6647);
        v260 = 2;
        v261 = sub_26E46C;
        v262 = sub_27E724(6783);
        v263 = 1;
        v264 = sub_26E538;
        v265 = sub_27E724(6802);
        v266 = 3;
        v267 = &sub_26E540;
        v268 = sub_27E724(6823);
        v269 = 1;
        v270 = sub_26E5BC;
        v271 = sub_27E724(6274);
        v272 = 5;
        v273 = sub_26C828;
        v274 = sub_27E724(6292);
        v275 = 1;
        v276 = sub_26C8C4;
        v277 = sub_27E724(6302);
        v278 = 1;
        v279 = sub_26C8E0;
        v280 = sub_27E724(6312);
        v281 = 3;
        v282 = sub_26C8FC;
        v283 = sub_27E724(6326);
        v284 = 3;
        v285 = sub_26C97C;
        v286 = sub_27E724(6340);
        v287 = 4;
        v288 = sub_26CA00;
        v289 = sub_27E724(6929);
        v290 = 3;
        v291 = sub_26CA44;
        v292 = sub_27E724(6939);
        v293 = 3;
        v294 = sub_26CAC4;
        v295 = sub_27E724(6949);
        v296 = 4;
        v297 = sub_26CB48;
        v298 = sub_27E724(6357);
        v299 = 2;
        v300 = &sub_26CB90;
        v301 = sub_27E724(6405);
        v302 = 3;
        v303 = sub_26DD1C;
        v304 = sub_27E724(6428);
        v305 = 3;
        v306 = sub_26DD7C;
        v307 = sub_27E724(6442);
        v308 = 3;
        v309 = sub_26DE00;
        v310 = sub_27E724(6695);
        v311 = 1;
        v312 = sub_26DE08;
        v313 = sub_27E724(6714);
        v314 = 1;
        v315 = sub_26DE38;
        v316 = sub_27E724(6733);
        v317 = 1;
        v318 = sub_26DE68;
        v319 = sub_27E724(6766);
        v320 = 1;
        v321 = sub_26DE84;
        v322 = sub_27E724(6836);
        v323 = 3;
        v324 = &sub_26DF54;
        v325 = sub_27E724(6851);
        v326 = 4;
        v327 = &sub_26DFBC;
        v328 = sub_27E724(6962);
        v329 = 14;
        v330 = sub_26E044;
        v331 = sub_27E724(6978);
        v332 = 5;
        v2 = 0LL;
        v333 = sub_26E058;
        do
        {
          v3 = *(unsigned __int8 **)((char *)&v11 + v2 * 8);
          v4 = strlen_sub_2398FC((__int64)v3);
          v5 = crc32_sub_22B670(v3, v4);
          v6 = v13[v2];
          v7 = *(_OWORD *)((char *)&v11 + v2 * 8);
          v8 = v5;
          v10 = v6;
          v9 = v7;
          result = sub_26B030(v1, &v8);
          v2 += 3LL;
        }
        while ( v2 != 324 );
      }
      return result;
    }
  • 在方法sub_268F9C对自定义的脚本进行语法解析，如果是方法，找到对应的模拟方法的Hander，计算方法名crc，通过crc查找上面表中对应的方法地址并执行

    sub_268F9C onEnter:                    0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  0123456789ABCDEF
    b400007137d6b058  6d 6f 64 75 6c 65 5f 65 78 69 73 74 73 28 22 6c  module_exists("l
    b400007137d6b068  69 62 68 6f 75 64 69 6e 69 5f 34 31 35 63 2e 73  ibhoudini_415c.s
    b400007137d6b078  6f 22 29 00 00 00 00 00 00 00 00 00 00 00 00 00  o").............
    b400007137d6b088  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b098  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b0a8  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b0b8  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b0c8  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b0d8  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b0e8  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b0f8  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b108  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b118  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b128  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b138  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    b400007137d6b148  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  • 在方法sub_22B670对代码段做了crc校验

    libtersafe2 base: 0x753bc01000
    sub_22B670 onEnter:              0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  0123456789ABCDEF
    753bc27000  1f 28 00 71 20 04 00 54 7f 04 00 f1 61 00 00 54  .(.q ..T....a..T
    753bc27010  1f 28 00 71 ad 03 00 54 7f 04 00 f1 f3 d7 9f 1a  .(.q...T........
    753bc27020  53 00 00 35 23 03 00 b5 1f 50 00 71 13 00 80 52  S..5#....P.q...R
    753bc27030  c0 02 00 54 e0 03 01 aa 61 1b 00 f0 21 e0 26 91  ...T....a...!.&.
    753bc27040  f5 03 02 aa 86 7a 0a 94 00 01 00 b4 61 1b 00 f0  .....z......a...
    753bc27050  62 1b 00 f0 21 00 27 91 42 20 27 91 7e 4c 0a 94  b...!.'.B '.~L..
    753bc27060  80 02 02 39 09 00 00 14 61 1b 00 f0 e0 03 15 aa  ...9....a.......
    753bc27070  21 60 27 91 7a 4b 0a 94 f3 03 00 2a 60 00 00 35  !`'.zK.....*`..5
    753bc27080  20 00 80 52 80 02 02 39 e0 03 13 2a f5 13 40 f9   ..R...9...*..@.
    753bc27090  f3 53 41 a9 fd 7b c3 a8 c0 03 5f d6 1f 08 40 71  .SA..{...._...@q
    753bc270a0  00 0b 00 54 08 05 00 54 1f 00 01 71 e1 03 00 2a  ...T...T...q...*
    753bc270b0  20 0c 00 54 48 02 00 54 1f 10 00 71 a0 09 00 54   ..TH..T...q...T
    753bc270c0  c8 00 00 54 00 04 00 51 21 00 80 52 1f 04 00 71  ...T...Q!..R...q
    753bc270d0  29 0b 00 54 57 00 00 14 1f 40 00 71 01 02 80 52  )[email protected]
    753bc270e0  a0 0a 00 54 1f 80 00 71 01 04 80 52 40 0a 00 54  [email protected]
    753bc270f0  1f 20 00 71 e1 09 00 54 3e 00 00 14 1f 00 08 71  . .q...T>......q 0x340000
  • 在方法sub_22B6AC对代码段每0x1000大小做一次crc校验

    libtersafe2 base: 0x753bc01000
    sub_22B6AC onEnter:              0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  0123456789ABCDEF
    753bc27000  1f 28 00 71 20 04 00 54 7f 04 00 f1 61 00 00 54  .(.q ..T....a..T
    753bc27010  1f 28 00 71 ad 03 00 54 7f 04 00 f1 f3 d7 9f 1a  .(.q...T........
    753bc27020  53 00 00 35 23 03 00 b5 1f 50 00 71 13 00 80 52  S..5#....P.q...R
    753bc27030  c0 02 00 54 e0 03 01 aa 61 1b 00 f0 21 e0 26 91  ...T....a...!.&.
    753bc27040  f5 03 02 aa 86 7a 0a 94 00 01 00 b4 61 1b 00 f0  .....z......a...
    753bc27050  62 1b 00 f0 21 00 27 91 42 20 27 91 7e 4c 0a 94  b...!.'.B '.~L..
    753bc27060  80 02 02 39 09 00 00 14 61 1b 00 f0 e0 03 15 aa  ...9....a.......
    753bc27070  21 60 27 91 7a 4b 0a 94 f3 03 00 2a 60 00 00 35  !`'.zK.....*`..5
    753bc27080  20 00 80 52 80 02 02 39 e0 03 13 2a f5 13 40 f9   ..R...9...*..@.
    753bc27090  f3 53 41 a9 fd 7b c3 a8 c0 03 5f d6 1f 08 40 71  .SA..{...._...@q
    753bc270a0  00 0b 00 54 08 05 00 54 1f 00 01 71 e1 03 00 2a  ...T...T...q...*
    753bc270b0  20 0c 00 54 48 02 00 54 1f 10 00 71 a0 09 00 54   ..TH..T...q...T
    753bc270c0  c8 00 00 54 00 04 00 51 21 00 80 52 1f 04 00 71  ...T...Q!..R...q
    753bc270d0  29 0b 00 54 57 00 00 14 1f 40 00 71 01 02 80 52  )[email protected]
    753bc270e0  a0 0a 00 54 1f 80 00 71 01 04 80 52 40 0a 00 54  [email protected]
    753bc270f0  1f 20 00 71 e1 09 00 54 3e 00 00 14 1f 00 08 71  . .q...T>......q 0x1000 0xffffffff
    sub_22B6AC onEnter: 0xa92ef9dc
    sub_22B6AC onEnter:              0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  0123456789ABCDEF
    753bc28000  ff 83 00 d1 fd 7b 01 a9 fd 43 00 91 c8 24 00 f0  .....{...C...$..
    753bc28010  00 41 22 91 47 7a 02 94 c8 23 00 f0 08 e9 47 f9  .A".Gz...#....G.
    753bc28020  c0 24 00 f0 01 40 22 91 e0 23 00 90 02 f4 43 f9  .$...@"..#....C.
    753bc28030  e0 03 08 aa b7 f7 ff 97 a0 c3 1f b8 fd 7b 41 a9  .............{A.
    753bc28040  ff 83 00 91 c0 03 5f d6 ff 83 00 d1 fd 7b 01 a9  ......_......{..
    753bc28050  fd 43 00 91 c8 24 00 f0 00 01 23 91 35 7a 02 94  .C...$....#.5z..
    753bc28060  c8 23 00 f0 08 e9 47 f9 c0 24 00 f0 01 00 23 91  .#....G..$....#.
    753bc28070  e0 23 00 90 02 f4 43 f9 e0 03 08 aa a5 f7 ff 97  .#....C.........
    753bc28080  a0 c3 1f b8 fd 7b 41 a9 ff 83 00 91 c0 03 5f d6  .....{A......._.
    753bc28090  ff 83 00 d1 fd 7b 01 a9 fd 43 00 91 c8 24 00 f0  .....{...C...$..
    753bc280a0  00 c1 23 91 23 7a 02 94 c8 23 00 f0 08 e9 47 f9  ..#.#z...#....G.
    753bc280b0  c0 24 00 f0 01 c0 23 91 e0 23 00 90 02 f4 43 f9  .$....#..#....C.
    753bc280c0  e0 03 08 aa 93 f7 ff 97 a0 c3 1f b8 fd 7b 41 a9  .............{A.
    753bc280d0  ff 83 00 91 c0 03 5f d6 ff 83 00 d1 fd 7b 01 a9  ......_......{..
    753bc280e0  fd 43 00 91 c8 24 00 f0 00 81 24 91 90 e6 01 94  .C...$....$.....
    753bc280f0  e8 23 00 90 08 41 44 f9 c0 24 00 f0 00 80 24 91  .#...AD..$....$. 0x1000 0xa92ef9dc
    sub_22B6AC onEnter: 0x66073cb2
    sub_22B6AC onEnter:              0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  0123456789ABCDEF
    753bc29000  fd 43 00 91 f3 24 00 d0 73 02 11 91 e0 03 13 aa  .C...$..s.......
    753bc29010  dc 2d 08 94 c0 23 00 f0 c2 23 00 f0 00 c4 41 f9  .-...#...#....A.
    753bc29020  42 f4 43 f9 fd 7b 41 a9 e1 03 13 aa f3 07 42 f8  B.C..{A.......B.
    753bc29030  b8 f3 ff 17 f3 0f 1e f8 fd 7b 01 a9 fd 43 00 91  .........{...C..
    753bc29040  f3 24 00 d0 73 42 26 91 e0 03 13 aa 89 2d 08 94  .$..sB&......-..
    753bc29050  c0 23 00 f0 c2 23 00 f0 00 14 40 f9 42 f4 43 f9  .#...#[email protected].
    753bc29060  fd 7b 41 a9 e1 03 13 aa f3 07 42 f8 a9 f3 ff 17  .{A.......B.....
    753bc29070  f3 0f 1e f8 fd 7b 01 a9 fd 43 00 91 40 6a 81 52  .....{[email protected]
    753bc29080  a9 59 09 94 13 25 00 b0 73 22 2a 91 60 02 00 f9  .Y...%..s"*.`...
    753bc29090  21 e7 08 94 48 12 00 f0 08 b1 23 91 60 a2 00 a9  !...H.....#.`...
    753bc290a0  20 6b 81 52 a0 59 09 94 60 0e 00 f9 1c e7 08 94   k.R.Y..`.......
    753bc290b0  48 12 00 f0 08 21 28 91 60 22 02 a9 e0 6c 81 52  H....!(.`"...l.R
    753bc290c0  99 59 09 94 60 1a 00 f9 17 e7 08 94 48 12 00 f0  .Y..`.......H...
    753bc290d0  08 81 36 91 60 a2 03 a9 e0 6e 81 52 92 59 09 94  ..6.`....n.R.Y..
    753bc290e0  60 26 00 f9 12 e7 08 94 68 12 00 90 08 41 08 91  `&......h....A..
    753bc290f0  60 22 05 a9 e0 70 81 52 8b 59 09 94 60 32 00 f9  `"...p.R.Y..`2.. 0x1000 0x66073cb2
    sub_22B6AC onEnter: 0x30aa1225
  • 通过frida和解密出来的字符串，很多关键点都可以快速定位了

    记得比较流水账，大佬们将就看。

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