Foreword
It is speculated that a Chinese gaming website 7k7k suffered a data breach in December 2011. The hack is thought to be part of a series of attacks directed at Chinese IT portals, gaming and social networking websites. The data leak has surfaced after China’s largest programmers’ website CSDN (China Software Developer Network) suffered a data breach.
What data is at risk?
The data that the 7k7k data breach has put at risk include email addresses and passwords. As 7k7k is based in China, both email addresses and passwords often include some sort of Chinese character combination.
Email addresses
There is a very wide range of email addresses used in this data breach – 7k7k clearly had users from multiple different countries. Judging from the analysis, their users mostly came from China, but the service also had users from United States, Japan, Hong Kong and Taiwan. Having multiple countries, we can also measure the distance between them, then see how far apart their customers are (all calculations are done in kilometers):
- The distance between China and United States is approximately 11,144km;
- The distance between China and Japan is approximately 2,099km;
- The distance between China and Hong Kong is approximately 1,973km;
- The distance between China and Taiwan is approximately 1,724km;
- The distance between United States and Japan is approximately 10,903km;
- The distance between United States and Hong Kong is approximately 13,113km;
- The distance between United States and Taiwan is approximately 12,648km;
- The distance between Japan and Hong Kong is approximately 2,887km;
- The distance between Japan and Taiwan is approximately 2,102km;
- The distance between Hong Kong and Taiwan is approximately 814km.
The average distance between customers is 5,940.7km.
The used email domains also allow us to understand which countries users originated from:
| # | Email Domain | Quantity | Country |
|---|---|---|---|
| 1 | 163.com | 1,869,224 | China |
| 2 | qq.com | 1,551,070 | China |
| 3 | tianya.cn | 1,157,638 | China |
| 4 | 126.com | 659,552 | China |
| 5 | sina.com | 455,188 | China |
| 6 | yahoo.com.cn | 306,840 | China |
| 7 | hotmail.com | 279,484 | United States |
| 8 | sohu.com | 195,233 | China |
| 9 | tom.com | 124,495 | China |
| 10 | 21cn.com | 84,261 | China |
| 11 | yahoo.cn | 78,788 | China |
| 12 | gmail.com | 77,557 | United States |
| 13 | yahoo.com | 53,239 | United States |
| 14 | sina.com.cn | 43,055 | China |
| 15 | eyou.com | 37,493 | China |
| 16 | vip.qq.com | 34,812 | China |
| 17 | yeah.net | 28,427 | China |
| 18 | 163.net | 25,736 | China |
| 19 | YAHOO.COM.TW | 21,655 | Taiwan |
| 20 | msn.com | 17,928 | United States |
| 21 | hainan.net | 17,415 | China |
| 22 | 16,645 | Unknown | |
| 23 | 263.net | 16,286 | China |
| 24 | live.cn | 11,360 | China |
| 25 | yahoo.com.hk | 10,377 | Hong Kong |
| 26 | 139.com | 9,812 | China |
| 27 | vip.sina.com | 9,595 | China |
| 28 | 123.com | 9,491 | Unknown |
| 29 | citiz.net | 7,879 | Unknown |
| 30 | chinaren.com | 7,469 | China |
| 31 | mail.china.com | 7,009 | China |
| 32 | etang.com | 5,810 | China |
| 33 | avl.com.cn | 5,150 | China |
| 34 | sian.com | 5,000 | China |
| 35 | foxmail.com | 4,534 | United States |
| 36 | 163.COM.CN | 3,891 | China |
| 37 | qq.com.cn | 3,610 | China |
| 38 | 263.com | 3,554 | China |
| 39 | sogou.com | 3,209 | China |
| 40 | tianya.com | 3,130 | China |
| 41 | vip.163.com | 2,956 | China |
| 42 | pp.com | 2,874 | Unknown |
| 43 | qq.cn | 2,539 | China |
| 44 | 163.CN | 2,352 | China |
| 45 | china.com | 2,320 | China |
| 46 | 63.com | 2,229 | Unknown |
| 47 | 56.com | 2,152 | China |
| 48 | 136.com | 1,997 | Unknown |
| 49 | mop.com | 1,950 | China |
| 50 | 168.com | 1,939 | China |
From the analysis of the top 50 email domains we can see that:
- The list has 7,286,209 users in total – that means that the top 50 email domains consume 98.13680114722213% of the entire 7k7k user base;
- The majority of users – 6,780,320 people – who used 7k7k registered from China: Chinese users consume 91.32306190428152% of the entire 7k7k user base;
- 432,742 users registered from the United States – that’s 5.828533823563282% of the entire 7k7k user base;
- 41,115 users registered from countries which couldn’t be identified – they consume 0.5537714577180036% of the entire 7k7k user base;
- 21,655 users registered from Taiwan – that’s 0.2916677834581873% of the entire 7k7k user base;
- 10,377 users registered from Hong Kong – they consume 0.13976617820113643% of the entire 7k7k user base.
Having analyzed the top 50 email domains, it is noticeable that 1.86319885277787% of the entire user base is not included in this list – that’s approximately 138,333 people.
Passwords
Having a glimpse at the most prevalent passwords used by people who used the 7k7k service, we can see that not all of the passwords used are ordinary – there’s a lot of at what might seem at first gibberish passwords among the usual ones. Here’s the top 50 passwords used:
| # | Password | Quantity |
|---|---|---|
| 1 | 123456 | 550,346 |
| 2 | 111111 | 153,044 |
| 3 | 0 | 109,405 |
| 4 | 123456789 | 84,680 |
| 5 | 123123 | 68,999 |
| 6 | 111222tianya | 64,822 |
| 7 | 5201314 | 40,292 |
| 8 | 12345678 | 26,652 |
| 9 | 123321 | 25,119 |
| 10 | 123 | 21,041 |
| 11 | 666666 | 18,964 |
| 12 | wangyut2 | 17,016 |
| 13 | 888888 | 16,770 |
| 14 | 7758521 | 15,754 |
| 15 | 1234567 | 15,396 |
| 16 | 11111111 | 13,871 |
| 17 | 1314520 | 13,801 |
| 18 | 111222 | 13,197 |
| 19 | woaini | 12,856 |
| 20 | 654321 | 12,079 |
| 21 | 112233 | 11,344 |
| 22 | a123456 | 10,237 |
| 23 | 88888888 | 9,317 |
| 24 | 123654 | 9,247 |
| 25 | 100200 | 9,142 |
| 26 | 520520 | 8,540 |
| 27 | 1234567890 | 8,344 |
| 28 | 123456a | 8,252 |
| 29 | 121212 | 8,149 |
| 30 | 999999 | 8,080 |
| 31 | 123698745 | 7,837 |
| 32 | AAAAAA | 7,684 |
| 33 | 110110 | 7,632 |
| 34 | 7758258 | 7,580 |
| 35 | 123123123 | 7,317 |
| 36 | 5211314 | 7,147 |
| 37 | asdasd | 6,744 |
| 38 | 1111111 | 6,669 |
| 39 | 147258 | 6,432 |
| 40 | zxcvbnm | 5,770 |
| 41 | iloveyou | 5,765 |
| 42 | 222222 | 5,487 |
| 43 | 159357 | 5,418 |
| 44 | 1234 | 5,380 |
| 45 | 12345 | 5,251 |
| 46 | 1 | 5,247 |
| 47 | 147258369 | 5,169 |
| 48 | 31415926 | 4,721 |
| 49 | 521521 | 4,628 |
| 50 | 333333 | 4,578 |
Among those passwords starting from number 60 we would have another list – this time, with unusual passwords included (unusual passwords are bold):
| # | Password | Quantity |
|---|---|---|
| 60 | EtnXtxSa65 | 3,728 |
| 61 | 137900 | 3,718 |
| 62 | 123000 | 3,652 |
| 63 | 789456 | 3,642 |
| 64 | qwerty | 3,642 |
| 65 | 1qaz2wsx | 3,635 |
| 66 | 774517397 | 3,632 |
| 67 | qazwsx | 3,518 |
| 68 | 456852 | 3,463 |
| 69 | 456123 | 3,454 |
| 70 | 201314 | 3,354 |
| 71 | 111 | 3,281 |
| 72 | 778899 | 3,190 |
| 73 | sgdHhfC4x2 | 3,126 |
| 74 | abc123 | 3,076 |
| 75 | 789456123 | 2,896 |
| 76 | NBvBB32fa9 | 2,892 |
| 77 | ApjSqpM844 | 2,876 |
| 78 | zzzzzz | 2,869 |
| 79 | kb9zc8uxtx | 2,862 |
| 80 | password | 2,740 |
| 81 | 666888 | 2,701 |
| 82 | 584520 | 2,699 |
| 83 | uifKjhF522 | 2,674 |
| 84 | JxsGx2Yd87 | 2,662 |
| 85 | 753951 | 2,622 |
| 86 | 1q2w3e4r | 2,607 |
| 87 | ndaCebx2wx | 2,592 |
| 88 | 123789 | 2,537 |
| 89 | sxUaIehAtp | 2,528 |
| 90 | qwe123 | 2,481 |
| 91 | qweqwe | 2,468 |
| 92 | 2m66xF2AJT | 2,468 |
| 93 | vjfLkiG522 | 2,436 |
| 94 | 102030 | 2,422 |
| 95 | cazzo1001 | 2,414 |
| 96 | qwqwqw | 2,407 |
| 97 | windows | 2,395 |
| 98 | asd123 | 2,372 |
| 99 | 6Cxd2X986x | 2,372 |
| 100 | 1111111111 | 2,370 |
| 101 | qfcFgdA3zx | 2,366 |
| 102 | 110120 | 2,365 |
| 103 | 11111 | 2,328 |
| 104 | d54q7xjmhx | 2,328 |
| 105 | zxcvbn | 2,328 |
| 106 | PCwAC33gb9 | 2,324 |
| 107 | 1230123 | 2,323 |
| 108 | 101010 | 2,321 |
| 109 | 1234560 | 2,319 |
| 110 | qq123456 | 2,319 |
| 111 | 314159 | 2,293 |
| 112 | i97wb6sxq7 | 2,290 |
| 113 | 147896325 | 2,289 |
| 114 | b33m6yghef | 2,282 |
| 115 | 456789 | 2,277 |
| 116 | xm55xExBZS | 2,274 |
| 117 | lssy123 | 2,274 |
| 118 | 168168 | 2,259 |
| 119 | mcaBdaw2vx | 2,258 |
| 120 | CrkUrrP954 | 2,250 |
| 121 | d54p7xjkha | 2,248 |
| 122 | 3uc9xN53xH | 2,242 |
| 123 | jianfei000 | 2,220 |
| 124 | 777777 | 2,210 |
| 125 | qwertyuiop | 2,209 |
| 126 | 4wdaxQ642F | 2,194 |
| 127 | theIigD4x2 | 2,190 |
| 128 | asdfasdf | 2,188 |
| 129 | 7Fxf3Jba8t | 2,188 |
| 130 | 11223344 | 2,158 |
| 131 | 110119 | 2,157 |
| 132 | yniQnmK733 | 2,154 |
| 133 | 987654 | 2,153 |
| 134 | 131421 | 2,118 |
| 135 | 7758520 | 2,114 |
| 136 | zWN6Vbdvpj | 2,108 |
| 137 | 741852 | 2,078 |
| 138 | asdfgh | 2,072 |
| 139 | 8x2h4Fddap | 2,052 |
| 140 | tangkay | 2,040 |
| 141 | LztEz2xe98 | 2,038 |
| 142 | 789789 | 2,025 |
| 143 | e65r82kni2 | 2,010 |
| 144 | g86ua5qsn5 | 2,008 |
| 145 | ymhPnmJ733 | 1,984 |
| 146 | 147852 | 1,982 |
| 147 | 6Exe3Za97v | 1,980 |
| 148 | 131420 | 1,979 |
| 149 | 1,978 | |
| 150 | xj453CxDXQ | 1,978 |
| 151 | VHBtH55jec | 1,976 |
| 152 | 4yfb2S753C | 1,960 |
| 153 | 123654789 | 1,952 |
| 154 | FRI3Q9arjg | 1,940 |
| 155 | 709394 | 1,936 |
| 156 | ZLEnK77nge | 1,932 |
| 157 | 5bt2jtzTKE | 1,918 |
| 158 | 2r97xJ3xEY | 1,912 |
| 159 | 963852 | 1,893 |
| 160 | c44n6vijgc | 1,892 |
| 161 | a12345 | 1,886 |
| 162 | 211314 | 1,867 |
| 163 | a33k5Afgdh | 1,852 |
| 164 | xfx3ayFJRK | 1,844 |
| 165 | 12301230 | 1,841 |
| 166 | zouyong | 1,838 |
| 167 | xgx39zGISL | 1,836 |
| 168 | majiajun8888 | 1,832 |
| 169 | 741852963 | 1,830 |
| 170 | diank123 | 1,812 |
| 171 | SEyxE44hca | 1,796 |
| 172 | asdfghjkl | 1,781 |
| 173 | 8xxg4Gcc9q | 1,768 |
| 174 | 12341234 | 1,765 |
| 175 | woaiwojia | 1,762 |
| 176 | f5GhyjqHAv | 1,752 |
| 177 | caonima | 1,749 |
| 178 | DsmWssR955 | 1,748 |
| 179 | 7007 | 1,747 |
| 180 | 123abc | 1,744 |
| 181 | 19960309 | 1,744 |
| 182 | ja8yc8uxsx | 1,734 |
| 183 | 808080 | 1,733 |
| 184 | 5845201314 | 1,726 |
| 185 | JMFxL78nhe | 1,716 |
| 186 | UGAuG55jdb | 1,716 |
| 187 | 5zgb2T764B | 1,712 |
| 188 | 951753 | 1,709 |
| 189 | 555666 | 1,706 |
| 190 | XJCrI66kfd | 1,694 |
| 191 | xk55xDxCYR | 1,694 |
| 192 | 1q2w3e | 1,694 |
| 193 | 999999999 | 1,694 |
| 194 | xi345BJFVP | 1,676 |
| 195 | 10203 | 1,667 |
| 196 | 20080808 | 1,659 |
| 197 | b43m6xhiee | 1,654 |
| 198 | 3344520 | 1,644 |
| 199 | woaini1314 | 1,634 |
| 200 | 28zxrpvNFA | 1,630 |
| 201 | a123456789 | 1,623 |
| 202 | 456456 | 1,619 |
| 203 | abcd1234 | 1,611 |
| 204 | f76t93nqk3 | 1,610 |
| 205 | HvqJvxVb76 | 1,610 |
| 206 | 12344321 | 1,606 |
| 207 | 123456789a | 1,601 |
| 208 | 1123581321 | 1,600 |
| 209 | 369369 | 1,597 |
| 210 | 579395571 | 1,596 |
| 211 | g76t94prm4 | 1,596 |
| 212 | qebEfcz3yx | 1,596 |
| 213 | 25257758 | 1,583 |
| 214 | 321654 | 1,577 |
| 215 | 2n66xG2zIU | 1,574 |
| 216 | wkgMkjH623 | 1,558 |
| 217 | 112358 | 1,552 |
| 218 | HwrIwxWc76 | 1,552 |
| 219 | q123456 | 1,549 |
| 220 | woshishui | 1,546 |
| 221 | DSK4R9bskh | 1,542 |
| 222 | 28zxrpuNFA | 1,540 |
| 223 | 111111111 | 1,537 |
| 224 | 6cs2huAULF | 1,534 |
| 225 | 3sa8xK4xDZ | 1,528 |
| 226 | 123456abc | 1,518 |
| 227 | GvqJvxVb76 | 1,516 |
| 228 | 2q87xI3vFX | 1,512 |
| 229 | HPH2N89qif | 1,506 |
| 230 | AVM6Ubdunj | 1,500 |
| 231 | qazwsxedc | 1,489 |
| 232 | 4xeaxR653E | 1,484 |
| 233 | 20082008 | 1,484 |
| 234 | m2YdEgkDws | 1,480 |
| 235 | 445566 | 1,479 |
| 236 | 520530 | 1,478 |
| 237 | xh246AIGUN | 1,474 |
| 238 | 564335 | 1,473 |
| 239 | uIS9Zdgysn | 1,470 |
| 240 | shmily | 1,469 |
| 241 | 246810 | 1,469 |
| 242 | 7895123 | 1,468 |
| 243 | RDxyD43hca | 1,468 |
| 244 | 922i4Deebm | 1,466 |
| 245 | 963852741 | 1,455 |
| 246 | 922i4Ceebk | 1,452 |
| 247 | 3.1415926 | 1,452 |
| 248 | tianya | 1,448 |
| 249 | 444444 | 1,439 |
| 250 | a123123 | 1,436 |
| 251 | xiaoxiao | 1,434 |
| 252 | 135246 | 1,433 |
| 253 | ja8yc7txs8 | 1,432 |
| 254 | ja8xb7txr8 | 1,422 |
| 255 | DsmVssQ955 | 1,420 |
| 256 | BqkTqqN844 | 1,418 |
| 257 | i4IfBinFyu | 1,416 |
| 258 | rui100 | 1,410 |
| 259 | wang123 | 1,409 |
| 260 | 1234qwer | 1,409 |
| 261 | JMFxL78phe | 1,402 |
| 262 | ww111111 | 1,397 |
| 263 | e65r82mnj2 | 1,392 |
| 264 | 7Fxf3Jaa7u | 1,390 |
| 265 | 584521 | 1,388 |
| 266 | 5Bhc2V875z | 1,386 |
| 267 | zniRpnL744 | 1,386 |
| 268 | 2r97xJ3xEX | 1,382 |
| 269 | e65r82mpj2 | 1,376 |
| 270 | x7BktntLEz | 1,372 |
| 271 | xYQ7Xcewqk | 1,370 |
| 272 | 476730751 | 1,370 |
| 273 | f75s83nqk3 | 1,370 |
| 274 | IxrHx2Xc87 | 1,366 |
| 275 | h87va5rtp6 | 1,362 |
| 276 | 336699 | 1,361 |
| 277 | 4xebxR653D | 1,358 |
| 278 | i98xb7sxr7 | 1,356 |
| 279 | KytFy2xd98 | 1,354 |
| 280 | 8x2h4Eddan | 1,354 |
| 281 | qweasd | 1,346 |
| 282 | xkhNmkI633 | 1,344 |
| 283 | 3tb9xM42xI | 1,342 |
| 284 | 8en3dwDXPI | 1,338 |
| 285 | abc123456 | 1,324 |
| 286 | 5zgc2T764B | 1,324 |
| 287 | 922i4Ddebm | 1,322 |
| 288 | 654123 | 1,315 |
| 289 | FupYuxTa66 | 1,310 |
| 290 | 134679 | 1,306 |
| 291 | xk45xDxCYR | 1,302 |
| 292 | g76u94prm4 | 1,300 |
| 293 | 2p76xG2yHV | 1,296 |
| 294 | 3651118xun | 1,294 |
| 295 | KytFy2xd97 | 1,294 |
| 296 | LzuDz2xe98 | 1,294 |
| 297 | z123456 | 1,287 |
| 298 | e5FhxkqIBw | 1,286 |
| 299 | 123465 | 1,284 |
| 300 | 251314 | 1,283 |
| 301 | g86u94psn5 | 1,280 |
| 302 | 87654321 | 1,278 |
| 303 | b43n6whifd | 1,274 |
| 304 | 721521 | 1,266 |
| 305 | 4yfb2S753D | 1,266 |
| 306 | QDxzC43gba | 1,264 |
| 307 | 911911 | 1,261 |
| 308 | 888999 | 1,253 |
| 309 | 258369 | 1,253 |
| 310 | 5Ahc2V875z | 1,252 |
| 311 | c44n6vijfc | 1,242 |
| 312 | k3ZeDhmExs | 1,238 |
| 313 | 135790 | 1,238 |
| 314 | a7CkuntLDy | 1,236 |
| 315 | mc9Ad9w2ux | 1,232 |
| 316 | xh248zHHTM | 1,232 |
| 317 | xfk3bxEZQJ | 1,224 |
| 318 | WIBsH56kec | 1,224 |
| 319 | a11111 | 1,223 |
| 320 | TFzwF44idb | 1,220 |
| 321 | wZQ8Xcfxqm | 1,220 |
| 322 | wwwwww | 1,218 |
| 323 | 4vdaxP542G | 1,218 |
| 324 | pdbDfby2xx | 1,218 |
| 325 | 811009 | 1,215 |
| 326 | 3ub9xM53xI | 1,212 |
| 327 | 22222222 | 1,209 |
| 328 | yangyang | 1,208 |
| 329 | asdasdasd | 1,206 |
| 330 | 518518 | 1,206 |
| 331 | zxczxc | 1,203 |
| 332 | buzhidao | 1,203 |
| 333 | TGzvF55idb | 1,202 |
| 334 | n2XcFgjCvr | 1,194 |
| 335 | 124578 | 1,191 |
| 336 | aaaaaaaa | 1,186 |
| 337 | wZR8Ycfxrm | 1,182 |
| 338 | p2WcFfjCvr | 1,176 |
| 339 | h4HgAipGzu | 1,172 |
| 340 | FQI3P8arjg | 1,168 |
| 341 | 118720 | 1,166 |
| 342 | 232323 | 1,164 |
| 343 | YKDpJ67mgd | 1,162 |
| 344 | HPG2N89qif | 1,160 |
| 345 | 2p76xH2xHV | 1,156 |
| 346 | abcdefg | 1,155 |
| 347 | BqkTrqN844 | 1,154 |
| 348 | theIigE4x2 | 1,154 |
| 349 | w123456 | 1,153 |
| 350 | guo150 | 1,152 |
| 351 | woainima | 1,151 |
| 352 | 111000 | 1,148 |
| 353 | a22j5Bffci | 1,142 |
| 354 | a111111 | 1,140 |
| 355 | x8AxspuMEz | 1,134 |
| 356 | majiajun | 1,134 |
| 357 | qweasdzxc | 1,134 |
| 358 | 4weaxQ642E | 1,134 |
| 359 | 258258 | 1,127 |
| 360 | 922j5Cefcj | 1,126 |
| 361 | wkgMmjH623 | 1,122 |
| 362 | GvqZvxUb76 | 1,122 |
| 363 | ncaBeax2vx | 1,122 |
| 364 | q1w2e3r4 | 1,121 |
| 365 | wocaonima | 1,121 |
| 366 | vJS9Zdgyrn | 1,120 |
| 367 | f76t94prm4 | 1,110 |
| 368 | 12121212 | 1,109 |
| 369 | 3tb8xL42BJ | 1,108 |
| 370 | xh247AHGUM | 1,108 |
| 371 | xi345BIFVN | 1,106 |
| 372 | yXP7Wbewpk | 1,106 |
| 373 | loveyou | 1,104 |
| 374 | pebDfcz3yx | 1,100 |
| 375 | qxVbGfiBuq | 1,098 |
| 376 | qecEgdA3zx | 1,096 |
| 377 | 7654321 | 1,096 |
| 378 | c54p7uikgb | 1,094 |
| 379 | zniQpnK733 | 1,094 |
| 380 | 147852369 | 1,094 |
| 381 | 666999 | 1,092 |
| 382 | ffffff | 1,092 |
| 383 | JysGy2Yd87 | 1,090 |
| 384 | 8x2h4Fccap | 1,090 |
| 385 | 123457 | 1,090 |
| 386 | BUL5Tacumi | 1,088 |
| 387 | c6DjvmsKCx | 1,088 |
| 388 | pebEfcz3yx | 1,088 |
| 389 | 5845211314 | 1,088 |
| 390 | 120120 | 1,084 |
| 391 | 121314 | 1,084 |
| 392 | tHTaJehzsp | 1,084 |
| 393 | 119119 | 1,083 |
| 394 | 142536 | 1,083 |
| 395 | p2XcFgjCvr | 1,078 |
| 396 | 3344521 | 1,077 |
| 397 | 4wdaxP642F | 1,076 |
| 398 | 5203344 | 1,076 |
| 399 | b43m6xhife | 1,074 |
| 400 | 123456q | 1,073 |
| 401 | 584131421 | 1,072 |
| 402 | 39xxpqwQHB | 1,070 |
| 403 | 7cr2guBVMG | 1,070 |
| 404 | k3ZeChmExt | 1,070 |
| 405 | 111222333 | 1,067 |
| 406 | 2n76xG2yIU | 1,066 |
| 407 | weiwei | 1,065 |
| 408 | 520123 | 1,062 |
| 409 | 2q87xI3wGW | 1,058 |
| 410 | FupYuxTb66 | 1,054 |
| 411 | 7Exe3Zaa7u | 1,052 |
| 412 | a22j5Bffcj | 1,052 |
| 413 | 5Ahc2U874A | 1,048 |
| 414 | qwe123456 | 1,048 |
| 415 | CrmVssQ955 | 1,042 |
| 416 | 12369874 | 1,042 |
| 417 | 123456aa | 1,040 |
| 418 | 852456 | 1,037 |
| 419 | 1.23457E+11 | 1,035 |
| 420 | 29yxqqvPGB | 1,032 |
| 421 | zxc123 | 1,028 |
| 422 | yXP7Wcewpk | 1,026 |
| 423 | pebDfcy3xx | 1,026 |
| 424 | INGxM78phf | 1,026 |
| 425 | rxVbHfiBuq | 1,022 |
| 426 | h97wa6ruq6 | 1,020 |
| 427 | 9em3dwDYPI | 1,020 |
| 428 | g4HgzjpHzv | 1,018 |
| 429 | vjgLkiG522 | 1,018 |
| 430 | UHAuG55jec | 1,016 |
| 431 | h123698745 | 1,016 |
| 432 | rgdGheB4xx | 1,016 |
| 433 | FtpYuxTa65 | 1,014 |
| 434 | 131313 | 1,012 |
| 435 | CTK4Sabtmi | 1,010 |
| 436 | IwrHw2Xc87 | 1,006 |
| 437 | j3JeChmExt | 1,006 |
| 438 | 2q87xI3wFW | 1,006 |
| 439 | 3ta8xL42CJ | 1,006 |
| 440 | 147369 | 1,006 |
| 441 | qwer1234 | 1,005 |
| 442 | b6DjvmsKCx | 1,002 |
| 443 | REyxE44hca | 1,000 |
| 444 | theJigE4x2 | 996 |
| 445 | xmhPnkJ633 | 996 |
| 446 | 1q2w3e4r5t | 993 |
| 447 | 24081986 | 990 |
| 448 | wanshuai198202 | 990 |
| 449 | 521314 | 985 |
| 450 | CrmVsrQ955 | 984 |
| 451 | uieJjhE5x2 | 984 |
| 452 | 1230 | 982 |
| 453 | YKDpK67mgd | 978 |
| 454 | d6EiwkrJBx | 978 |
| 455 | BUL5Tactmi | 978 |
| 456 | forever | 974 |
| 457 | e65s83mpj2 | 972 |
| 458 | 7788521 | 972 |
| 459 | 556677 | 971 |
| 460 | IwrIwxWc87 | 970 |
| 461 | 123456123 | 970 |
| 462 | 4avxmsxRID | 968 |
| 463 | 521125 | 968 |
| 464 | QCwzC33gb9 | 966 |
| 465 | 820919 | 961 |
| 466 | 123456987 | 960 |
| 467 | aa123456 | 957 |
| 468 | i4JfBinFyt | 948 |
| 469 | h87va5qtp6 | 942 |
| 470 | fuckyou | 941 |
| 471 | 19870111 | 940 |
| 472 | nicholas | 939 |
| 473 | asd123456 | 936 |
| 474 | 1234566 | 935 |
| 475 | kb9Ad9vxux | 932 |
| 476 | rfcGgeB3xx | 932 |
| 477 | vjfKjiG522 | 932 |
| 478 | 1234abcd | 928 |
| 479 | ja8yc8txsx | 928 |
| 480 | 1234554321 | 927 |
| 481 | x7BxtntMEz | 924 |
| 482 | worinima | 923 |
| 483 | xmhNmkI633 | 922 |
| 484 | 3vc9xN53xH | 922 |
| 485 | 369258 | 920 |
| 486 | 5Ahc2U875A | 920 |
| 487 | 4awxnrxRIC | 920 |
| 488 | b33k5ygheg | 920 |
| 489 | 123456qq | 919 |
| 490 | 258456 | 919 |
| 491 | c44p7uijgb | 918 |
| 492 | QDxzD43gba | 916 |
| 493 | 6Exe3Ya97v | 916 |
| 494 | DSJ4R9bskh | 914 |
| 495 | 1357924680 | 913 |
| 496 | NBvCA32fa9 | 910 |
| 497 | 520025 | 909 |
| 498 | 7Gxf3Ibb8s | 908 |
| 499 | 110 | 907 |
| 500 | 922i4Deebk | 902 |
Obviously, the exact count of “unusual” passwords is up for debate, but if we take the top 500 used passwords and count passwords that were in use on the service and are classified as unusual (such passwords are visible in bold), we would have 229 instances of unusual password usage and 329,847 total unusual passwords in use.
If we count from the top 500 used passwords, 229 instances of unusual password usage would consume 45.8% of the top 500 passwords and if we count unusual passwords against all of the passwords that have been used, we could see that unusual passwords consume 4.442657278703887% of the entire user base – that means that unusual passwords have been used by approximately 329,847 people.
It is likely that these passwords were typed on keyboards that had a different layout than the “qwerty” keyboards do – in China, Pinyin is a very prevalent keyboard layout so it is likely that this layout was used. The majority of the unusual passwords consist of 10 characters and contain uppercase, lowercase letters and numbers without any special symbols – that means that it is very unlikely for them to have been generated by a password manager as the vast majority of password managers include special symbols in generated passwords unless specified otherwise.
In this case, unusual passwords are usually of 33 bits of entropy which means that they could be cracked relatively quickly – a supercomputer could crack such passwords in approximately 5 seconds and a PC with a GPU could crack such passwords in approximately 10 hours.
Summary
As the 7k7k data leak surfaced after a part of a continuous cyber attack after China’s largest programmers’ website CSDN (China Software Developer Network) suffered a data breach, this data leak might show that not all hackers choose their targets. Dubbed “the most serious Chinese user data leak in history”, this data breach should teach the affected people a lesson – users should enhance the protection of their personal account information by using password managers that allow them to choose complicated passwords and change them regularly.