Penguins
by vishalananth
waddle waddle
Files
Solution
We are given a zip file, unzip it to find a git tracked directory. Opening all the files in it gives no result as expected. Now let us move to the .git file and check the logs:
cat git/.git/logs/HEAD
0000000000000000000000000000000000000000 9dcf170a0fb6ae21b5299669b4336a6324c0c316 John Doe <John@doe.com> 1593464930 +0000 commit (initial): first commit
9dcf170a0fb6ae21b5299669b4336a6324c0c316 1117a337faf1ac693cf26bb3bcccb3caa0381d6d John Doe <John@doe.com> 1593464967 +0000 commit: birds are cool
1117a337faf1ac693cf26bb3bcccb3caa0381d6d 1117a337faf1ac693cf26bb3bcccb3caa0381d6d John Doe <John@doe.com> 1593464995 +0000 checkout: moving from master to feature1
1117a337faf1ac693cf26bb3bcccb3caa0381d6d 955eeb70bcb49d8de331b61f38219bccb7e8f933 John Doe <John@doe.com> 1593465063 +0000 commit: add content
955eeb70bcb49d8de331b61f38219bccb7e8f933 7d6997a74cfa2b5e266355d33fd73c76c9fe9b75 John Doe <John@doe.com> 1593465146 +0000 commit: cooler bird
7d6997a74cfa2b5e266355d33fd73c76c9fe9b75 1117a337faf1ac693cf26bb3bcccb3caa0381d6d John Doe <John@doe.com> 1593465153 +0000 checkout: moving from feature1 to master
1117a337faf1ac693cf26bb3bcccb3caa0381d6d 8ee62379b45217202e75011966b813512cafcbb0 John Doe <John@doe.com> 1593465185 +0000 commit: added an interesting file
8ee62379b45217202e75011966b813512cafcbb0 b474ae165218fec38ac9fb8d64f452c1270e68ea John Doe <John@doe.com> 1593465223 +0000 commit: some new info
b474ae165218fec38ac9fb8d64f452c1270e68ea 102b03d19f932fc5e76d460604804dd522d6850d John Doe <John@doe.com> 1593465324 +0000 commit: some more changes
102b03d19f932fc5e76d460604804dd522d6850d 27440c52e8a7a3d2e50f8fcdee0a88b0f937598d John Doe <John@doe.com> 1593465369 +0000 commit (merge): Merge branch 'feature1'
27440c52e8a7a3d2e50f8fcdee0a88b0f937598d b474ae165218fec38ac9fb8d64f452c1270e68ea John Doe <John@doe.com> 1593465694 +0000 checkout: moving from master to b474ae1
b474ae165218fec38ac9fb8d64f452c1270e68ea b474ae165218fec38ac9fb8d64f452c1270e68ea John Doe <John@doe.com> 1593465718 +0000 checkout: moving from b474ae165218fec38ac9fb8d64f452c1270e68ea to fascinating
b474ae165218fec38ac9fb8d64f452c1270e68ea d14fcbfd3c916a512ad1b956cd19fb7be16c20c6 John Doe <John@doe.com> 1593465745 +0000 commit: an irrelevant file
d14fcbfd3c916a512ad1b956cd19fb7be16c20c6 cfd97cd36fe6c5e450d5057bf25aa1d7ddeca9ef John Doe <John@doe.com> 1593465781 +0000 commit: add content to irrelevant file
cfd97cd36fe6c5e450d5057bf25aa1d7ddeca9ef 5dcac0eddbcb4bffdec552a1172f84762a0b4174 John Doe <John@doe.com> 1593465822 +0000 commit: another perhaps relevant file
5dcac0eddbcb4bffdec552a1172f84762a0b4174 fb70ca39a7437eaba2850703018e1cf9073789e6 John Doe <John@doe.com> 1593465988 +0000 commit: probably not relevant
fb70ca39a7437eaba2850703018e1cf9073789e6 57adae71c223a465b6db3a710aab825883286214 John Doe <John@doe.com> 1593466025 +0000 commit: relevant file
[ommitted]
57adae71c223a465b6db3a710aab825883286214 800bcb90123137a6ee981c93c140bd04c75f507f John Doe <John@doe.com> 1593466646 +0000 commit: some things are not needed
800bcb90123137a6ee981c93c140bd04c75f507f 27440c52e8a7a3d2e50f8fcdee0a88b0f937598d John Doe <John@doe.com> 1593466672 +0000 checkout: moving from fascinating to master
Checking this out we see a branch fascinating with many commits to it, this branch is dangling as we see a HEAD and ORIG_HEAD in the .git folder. The ORIG_HEAD is usually created when a dangerous branch switch is performed.
So lets move to the commit 57adae71c223a465b6db3a710aab825883286214 as follows:
git checkout 57adae71c223a465b6db3a710aab82588328621
Print all the files in it with:
cat *
We get:
cmon now
u didnt think ACTUALLY think it would be that easy
this is infact an irrelevant file
nope this aint relevant either chief
YXMgeW9kYSBvbmNlIHRvbGQgbWUgInJld2FyZCB5b3UgaSBtdXN0IgphbmQgdGhlbiBoZSBnYXZlIG1lIHRoaXMgLS0tLQpyZ2JjdGZ7ZDRuZ2wxbmdfYzBtbTE3c180cjNfdU5mMHI3dW40NzN9
haha
im not relevant
jebaited
We get an intersting base64 string
YXMgeW9kYSBvbmNlIHRvbGQgbWUgInJld2FyZCB5b3UgaSBtdXN0IgphbmQgdGhlbiBoZSBnYXZlIG1lIHRoaXMgLS0tLQpyZ2JjdGZ7ZDRuZ2wxbmdfYzBtbTE3c180cjNfdU5mMHI3dW40NzN9
decoding this gives us the flag.
tags: Misc