硬件安全入门(下)

2021-01-04 6,559

硬件安全入门(下)

上一篇文章中,我们通过一个徽章挑战,为读者详细介绍了如何转储Atmel芯片的固件,在本文中,我们将继续为读者演示如何转储更复杂的一个电路板:Belkin N300路由器。

 

转储Belkin N300路由器

 

接下来我们要转储的板子是Belkin N300路由器。当前,Belkin是最受欢迎的消费类路由器品牌之一,这意味着与之前的CTF徽章不同,这次的挑战提供了更多的真实场景。因此,在该设备中发现漏洞的话,则可能会影响到全球的家庭。

 

首先我们要做的就是再去尝试定位一个闪存芯片。这次我们确定的是一款MX25L1606E芯片(图11),相关的参数见https://www.macronix.com/Lists/Datasheet/Attachments/7465/MX25L1606E,3V,16Mb,v1.9.pdf。

 

image.png 

11  mx25l1606e芯片

 

接下来,我们将使用Attify Badge(图12)来转储我们的固件,因为Bus Pirate已经“罢工”了。

 

image.png 

12  Attify Badge

 

引脚输出如下所示:

 

image.png 

13  mx25l1606e示意图 

 

MX25L1606E

Attify Badge

CS

CS

SO

MOSI

GND

GND

VCC

3.3V

SCLK

SCK

SI

MOSI

 

完成上述操作后,它应该是这样的:

 

image.png 

14  mx25l1606E(已经连接Attify Badge)

 

由于闪存芯片周围有金属框,所以这块板子上使用SOIC夹的空间有限,因此,这次我们采用了鳄鱼夹。

 

现在,准备工作已经就绪了,下面我们继续转储这个固件。但是,这次我们将使用名为“flashrom”的实用程序,而不是avrdude,因为我们要处理的是闪存 SPI芯片,而不是Atmel芯片。

 

首先,我们可以使用下面的命令来确定flashrom是否可以转储我们的芯片:“flashrom -p ft2232_spi:type=232H”。

 

该命令将尝试自动识别我们的芯片。如果你使用的是Bus Pirate,可以用下面的参数代替传递给-p的参数:“flashrom -p buspirate_spi:dev=/dev/ttyUSB0”。

 

其中,/dev/ttyUSB0是Bus Pirate连接的串口,读者可以根据需要进行修改。运行该命令后,成功返回如下内容: 

 

flashrom v0.9.9-r1954 on Linux 4.15.0-88-generic (x86_64)

flashrom is free software, get the source code at https://flashrom.org

Calibrating delay loop... delay loop is unreliable, trying to continue OK.

Found Macronix flash chip "MX25L1605A/MX25L1606E/MX25L1608E" (2048 kB, SPI) on ft2232_spi.

 

如果芯片识别失败也不要担心,可以用“flashrom -L”在列表中手动找到您的芯片,然后运行下面的命令,看看是否还能读取芯片:“flashrom -p ft2232_spi:type=232H -c MX25L1605A/MX25L1606E/MX25L1608E -r dump.bin”。

 

其中,-p选项表明我们要使用ft2232编程器(如果使用Bus Pirate,则用上面的-p参数进行相应的替换),-c选项表明我们要转储哪种闪存芯片(本例中是MX25L1606E),-r dump.bin告诉它将内容读入文件dump.bin。如果一切顺利的话,我们应该得到一个有效的固件文件。如果失败的话,则会报错,或者创建一个充满空字节的文件。

 

当然,这个过程可能需要一段时间,特别是对于较大的芯片;另外,我们可以从数据表中识别尺寸大小。由于MX25L1606E以地址1FFFFF结束,所以,其长度为2097151字节或2MB(图15)。

 

image.png 

15  mx25l1606e的存储器组织结构

 

这块2MB的芯片用了大约2分钟才完全转储过来。最后,我们很幸运,第一次就成功转储了固件。 

 

iot@attifyos ~> flashrom -p ft2232_spi:type=232H -c MX25L1605A/MX25L1606E/MX25L1608E -r dump.bin

flashrom v0.9.9-r1954 on Linux 4.15.0-88-generic (x86_64)

flashrom is free software, get the source code at https://flashrom.org

Calibrating delay loop... delay loop is unreliable, trying to continue OK.

Found Macronix flash chip "MX25L1605A/MX25L1606E/MX25L1608E" (2048 kB, SPI) on ft2232_spi.

Reading flash... done.

 

这时,该binwalk上场了: 

 

iot@attifyos ~> binwalk dump.bin

DECIMAL       HEXADECIMAL     DESCRIPTION

--------------------------------------------------------------------------------

5440          0x1540          LZMA compressed data, properties: 0x5D, dictionary size: 8388608 bytes, uncompressed size: 85344 bytes

28570         0x6F9A          Sercomm firmware signature, version control: 256, download control: 0, hardware ID: "AAZ", hardware version: 0x3200, firmware version: 0x6, starting code segment: 0x0, code size: 0x7310

142352        0x22C10         LZMA compressed data, properties: 0x5D, dictionary size: 8388608 bytes, uncompressed size: 2764800 bytes

881324        0xD72AC         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 3450 bytes

882534        0xD7766         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 10162 bytes

884943        0xD80CF         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 118270 bytes

917640        0xE0088         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 11937 bytes

920834        0xE0D02         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2992 bytes

921709        0xE106D         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 177 bytes

921863        0xE1107         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 116 bytes

921999        0xE118F         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 491 bytes

922337        0xE12E1         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 718 bytes

922610        0xE13F2         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 20267 bytes

926110        0xE219E         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 1196 bytes

926568        0xE2368         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 140 bytes

926729        0xE2409         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 708 bytes

927159        0xE25B7         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 17248 bytes

930471        0xE32A7         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 141 bytes

930632        0xE3348         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 543 bytes

930971        0xE349B         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 4166 bytes

932391        0xE3A27         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 5883 bytes

933996        0xE406C         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 3257 bytes

935281        0xE4571         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 49 bytes

935337        0xE45A9         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 7205 bytes

936048        0xE4870         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 4716 bytes

937318        0xE4D66         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2506 bytes

937984        0xE5000         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 7376 bytes

938892        0xE538C         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2951 bytes

939613        0xE565D         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 7369 bytes

940273        0xE58F1         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 11312 bytes

942619        0xE621B         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 7671 bytes

944755        0xE6A73         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 300 bytes

945073        0xE6BB1         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 99243 bytes

974918        0xEE046         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 89932 bytes

1006871       0xF5D17         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 55 bytes

1006939       0xF5D5B         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 1484 bytes

1007670       0xF6036         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 11316 bytes

1008768       0xF6480         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 6962 bytes

1010654       0xF6BDE         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2723 bytes

1011701       0xF6FF5         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 9151 bytes

1013994       0xF78EA         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 13151 bytes

1016828       0xF83FC         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 3592 bytes

1018079       0xF88DF         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 27452 bytes

1024437       0xFA1B5         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 711 bytes

1024870       0xFA366         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 71 bytes

1024953       0xFA3B9         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 3861 bytes

1026104       0xFA838         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 4303 bytes

1026844       0xFAB1C         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 11222 bytes

1029155       0xFB423         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2189 bytes

1030156       0xFB80C         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 15453 bytes

1031493       0xFBD45         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 11326 bytes

1032515       0xFC143         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 4244 bytes

1036593       0xFD131         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 15755 bytes

1040878       0xFE1EE         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2695 bytes

1042083       0xFE6A3         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 1956 bytes

1043986       0xFEE12         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 6532 bytes

1045769       0xFF509         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 868 bytes

1046218       0xFF6CA         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2208 bytes

1047043       0xFFA03         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 1010 bytes

1047474       0xFFBB2         LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2793 bytes

1048685       0x10006D        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 1599 bytes

1049943       0x100557        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 49437 bytes

1055931       0x101CBB        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2276 bytes

1056907       0x10208B        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 9850 bytes

1059309       0x1029ED        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 14359 bytes

1062254       0x10356E        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 115629 bytes

1096126       0x10B9BE        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 142 bytes

1096289       0x10BA61        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2379 bytes

1097270       0x10BE36        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 9662 bytes

1099324       0x10C63C        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 8110 bytes

1100452       0x10CAA4        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 16599 bytes

1104501       0x10DA75        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 113073 bytes

1139633       0x1163B1        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 1164 bytes

1140114       0x116592        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2749 bytes

1141269       0x116A15        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 992 bytes

1141593       0x116B59        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2386 bytes

1142645       0x116F75        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 3389 bytes

1143726       0x1173AE        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2593 bytes

1144845       0x11780D        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 112854 bytes

1178716       0x11FC5C        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 23875 bytes

1182332       0x120A7C        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 19256 bytes

1186345       0x121A29        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 22772 bytes

1189511       0x122687        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 19897 bytes

1193861       0x123785        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 5708 bytes

1195343       0x123D4F        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 118097 bytes

1230423       0x12C657        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2468 bytes

1231379       0x12CA13        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 122825 bytes

1264272       0x134A90        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 36 bytes

1264320       0x134AC0        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 3331 bytes

1265332       0x134EB4        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 114489 bytes

1299549       0x13D45D        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 6837 bytes

1301387       0x13DB8B        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 13110 bytes

1303991       0x13E5B7        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 119 bytes

1304130       0x13E642        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 3482 bytes

1305418       0x13EB4A        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2803 bytes

1306588       0x13EFDC        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 88006 bytes

1337278       0x1467BE        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 6572 bytes

1339658       0x14710A        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2384 bytes

1342047       0x147A5F        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 141 bytes

1342210       0x147B02        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 73 bytes

1342295       0x147B57        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 856 bytes

1343170       0x147EC2        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 625 bytes

1343809       0x148141        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 183 bytes

1343969       0x1481E1        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2619 bytes

1345099       0x14864B        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 3389 bytes

1346055       0x148A07        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 12586 bytes

1347838       0x1490FE        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 118 bytes

1347975       0x149187        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 650 bytes

1348652       0x14942C        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2791 bytes

1349331       0x1496D3        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 615 bytes

1349749       0x149875        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 13284 bytes

1352395       0x14A2CB        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 4897 bytes

1353804       0x14A84C        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 34279 bytes

1358905       0x14BC39        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 113 bytes

1359036       0x14BCBC        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 37989 bytes

1365372       0x14D57C        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2509 bytes

1366497       0x14D9E1        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 2175 bytes

1367477       0x14DDB5        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 7597 bytes

1369498       0x14E59A        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 5214 bytes

1371175       0x14EC27        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 43 bytes

1371229       0x14EC5D        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 114 bytes

1371363       0x14ECE3        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 290 bytes

1371584       0x14EDC0        LZMA compressed data, properties: 0x5D, dictionary size: 65536 bytes, uncompressed size: 929 bytes

 

“Sercomm Firmware Signature”这一行,我们可以看到一个硬件的ID为“AAZ”,它与电路板上的硬件ID完全匹配(图16)。现在,我们就可以继续分析这个固件的漏洞了。请记住,如果我们可以转储固件,我们也可以将自定义固件和后门写入闪存芯片。

 

image.png 

16  硬件标识

 

如果期间出错的话,最可能的两个原因是引脚没有正确连接,或者(如果引脚已经正确连接)它们正在给SPI芯片供电,使得芯片无法进行转储。第二种情况可能很常见,一般来说,最好的解决方法是用热*对芯片进行脱焊,然后用芯片自行转储固件。如前所述,最好检查一下电缆的长度,以确保故障不是由于电缆太长造成的。

 

虽然转储这些设备可能需要不少时间,但这可以帮助我们加深对这些设备的工作原理的了解。例如,通过转储Belkin设备的固件,我们可以直接分析源web文件,从而使我们可以更容易识别设备内的远程漏洞并加以利用。

 

通过利用这些类型的设备的安全漏洞,攻击者可以在受害者的路由器内创建一个后门,并重新路由所有网络流量,窃取受害者的银行和电子商务账户等账户的凭证。了解这些漏洞存在的地方,让我们有机会在它们造成任何重大损害之前修复它们。

 

在本系列的下一部分,我们将讨论JTAG和UART串行接口,如何访问它们,以及我们可以从中得到什么。

 

参考资料

 

我们可以借助一些工具来成功地转储这些固件,例如: 

 

    SOIC Clip:https://www.amazon.com/gp/product/B07R5LPTYM/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

    A device for dumping firmware (Bus Pirate): https://www.amazon.com/SparkFun-PID-12942-Bus-Pirate/dp/B01KKYN9LW

    Cables and clips: https://www.amazon.com/gp/product/B07R5LPTYM/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

    Additional useful wires: https://www.amazon.com/gp/product/B07PTYBFDT/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

 

Bus Pirate用于与SPI串行协议进行交互,以便为我们转储固件。其他可行的替代方案包括Shikra(https://int3.cc/products/the-shikra)和Attify Badge(https://www.attify-store.com/products/attify-badge-uart-jtag-spi-i2c-pre-soldered-headers)。当然,每个工具都有自己的优缺点。但是,Bus Pirate以及被广泛使用,并且有很好的文档,在我看来,它是最容易使用的。但是,Shikra被认为比Bus Pirate更稳定,速度更快,但没有那么多的支持。相比之下,Attify Badge则更易于设置,但同样支持有限。此外,Bus Pirate还提供了一个很好的串行接口,如果你愿意的话,可以很轻松与设备进行手动通信。读者可以根据自己的喜好和条件进行选择。

 

此外,由于电缆和夹子相当便宜,并且容易买到,因此,我特别推荐这些,因为它们已经为我提供了我迄今为止所需的一切,并且可以很好地夹在针脚上。 

 


本文作者:mssp299

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评论  (1)
快来写下你的想法吧!
  • Jun 2022-03-31 23:16:38

    大师,请问一下你的Attify Badge是哪里买的呢?我正想买 找不到渠道。。。

mssp299

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