Also known as
  • GreHack

Website: https://grehack.fr

Website: https://securimag.org/

Twitter: https://twitter.com/grehackconf

Sign in to join the team.



Securimag is an Information Security and hackers association at the french engineering school Ensimag.

Participated in CTF events

Overall rating place: 6161 with 7.137 pts in 2023

Country place: 147

PlaceEventCTF pointsRating points
23Insomni'hack 20231173.00007.137

Overall rating place: 2068 with 19.038 pts in 2022

Country place: 65

PlaceEventCTF pointsRating points
7Insomni'hack 20222549.000015.855
38Insomni'hack teaser 2022401.00003.182

Overall rating place: 19574 with 0.980 pts in 2021

Country place: 229

PlaceEventCTF pointsRating points
10ph0wn 2021547.00000.000
110Union CTF 2021200.00000.980

Overall rating place: 262 with 110.573 pts in 2020

Country place: 8

PlaceEventCTF pointsRating points
322hxp CTF 202019.00000.513
335pbctf 20201.00000.079
447HITCON CTF 202050.00001.191
98Dragon CTF 2020197.00004.930
43Square CTF 2020501.00008.468
34Hack.lu CTF 20201727.000031.542
45N1CTF 2020705.00003.107
54SECCON 2020 Online CTF515.00008.349
22TastelessCTF 2020757.00004.587
24EKOPARTY CTF 20208078.000014.246
77TokyoWesterns CTF 6th 2020597.000013.027
96CSAW CTF Qualification Round 20201505.000020.772
341Houseplant CTF 20202108.00001.545
94zer0pts CTF 2020571.00001.407

Overall rating place: 203 with 111.699 pts in 2019

Country place: 6

PlaceEventCTF pointsRating points
88OverTheWire Advent Bonanza 2019854.00002.197
105TUCTF 20196949.000014.220
63RuCTFE 201978128.40001.636
33Hack.lu CTF 20191459.000013.743
210CSAW CTF Qualification Round 2019451.00003.730
560Facebook CTF 2019100.00000.151
148ångstromCTF 2019920.00004.046
1920CTF/TCTF 2019 Quals75.00001.518
16Insomni'hack 2019871.000019.995
110Insomni'hack teaser 2019104.00002.113

Overall rating place: 220 with 84.603 pts in 2018

Country place: 13

PlaceEventCTF pointsRating points
68OverTheWire Advent Bonanza 20181.00000.342
50Hack.lu CTF 20181112.000016.582
94InCTF 2018150.00000.442
82Hackover CTF 2018300.00001.553
75Teaser Dragon CTF 2018254.00003.159
229CSAW CTF Qualification Round 2018876.00004.903
84HackIT CTF 201842.00000.368
143TokyoWesterns CTF 4th 2018332.00005.269
439Meepwn CTF Quals 2018100.00000.298
72Google Capture The Flag 2018 (Quals)577.00007.637
81INS'hAck 2018416.00001.917
172Nuit du Hack CTF Quals 20181.00000.285
9Insomni'hack 20181804.000024.411
239NeverLAN CTF 20181058.00002.176
142TAMUctf 182524.00009.694
112AceBear Security Contest 2018100.00000.435
21Insomni'hack teaser 2018517.00008.856

Overall rating place: 236 with 62.036 pts in 2017

Country place: 12

PlaceEventCTF pointsRating points
16634C3 CTF49.00001.176
118Kaspersky Industrial CTF Quals 2017600.00001.822
157Square CTF 2017750.00003.426
72DefCamp CTF Qualification 2017287.00001.481
37BackdoorCTF 20171450.000015.984
252CSAW CTF Qualification Round 2017726.00002.878
50CTFZone 2017409.00001.198
81TAMUctf 20171580.00007.781
153INS'hAck 2017250.00001.164
13Insomni'hack 201729300.000016.938
122UCSB iCTF 201711643.04380.430
112Boston Key Party CTF 2017450.00006.280
385BSides San Francisco CTF64.00000.285
44Insomni'hack teaser 2017550.00004.248

Overall rating place: 171 with 77.445 pts in 2016

Country place: 9

PlaceEventCTF pointsRating points
5Juniors CTF 20169300.00000.000
62RC3 CTF 20162690.00007.208
68Hack The Vote 20161051.00004.638
117EKOPARTY CTF 2016825.00007.258
313SECUINSIDE CTF Quals 20161.00000.043
296Blaze CTF 2016420.00002.884
505PlaidCTF 20161.00000.192
119Nuit du Hack CTF Quals 2016650.00007.845
123Pwn2Win CTF 2016105.00001.127
132BCTF 2016160.00001.263
15Insomni'hack 201634250.000012.055
620CTF 2016 Quals8.00004.731
78Boston Key Party CTF 201621.000013.894
18Internetwache CTF 20162100.00005.278
69Sharif University CTF 20161400.00009.028

Overall rating place: 121 with 95.306 pts in 2015

Country place: 3

PlaceEventCTF pointsRating points
103TUM CTF Teaser30.00000.631
36EKOPARTY CTF 20151360.000013.430
23Hack.lu CTF 20152850.000029.332
150Defcamp CTF Qualification 2015652.00001.467
333Trend Micro CTF Asia Pacific & Japan 2015 Online Qualifier100.00000.405
157CSAW CTF Qualification Round 20151860.000011.100
66MMA CTF 1st 2015900.00006.813
263PlaidCTF 201551.00001.122
23Nuit du Hack CTF Quals 20152050.000021.739
60BackdoorCTF 20151110.00008.712
67B-Sides Vancouver 2015260.00000.556
294Insomni'hack teaser 20150.00000.000

Overall rating place: 225 with 49.980 pts in 2014

Country place: 12

PlaceEventCTF pointsRating points
2729447 Security Society CTF 201426.00000.259
55CSCAMP CTF Quals 20141210.00001.552
51Hack.lu CTF 20142391.000020.227
188Defcamp CTF Qualification 2014800.00000.780
361CSAW CTF Qualification Round 20141250.00008.500
41Boston Key Party CTF 2014925.000011.647
56Olympic CTF Sochi 2014520.00007.014

Overall rating place: 115 with 108.442 pts in 2013

Country place: 7

PlaceEventCTF pointsRating points
70Hack.lu CTF 20131210.000020.034
266CSAW CTF Qualification Round 20131900.00009.419
118DEF CON CTF Qualifier 201321.000025.963
39Boston Key Party CTF 2013650.00007.129
42EBCTF Teaser 2013300.00003.988
10h34dCTF 20131200.00002.722
58BaltCTF Quals 2013773.00003.004
151PlaidCTF 2013170.00004.243
5Insomni'hack 20131470.00006.983
52ForbiddenBITS CTF 20131325.000012.534
33Nuit du Hack CTF Quals 2013701.000012.424
PlaceEventCTF pointsRating points
185Nuit du Hack CTF Quals 20120.00000.000
117ForbiddenBITS CTF 20120.00000.000

Organized CTF events

NameWeight
GreHack CTF 20220.00
GreHack CTF 201924.25
GreHack CTF 20180.00
GreHack CTF 20170.00
GreHack CTF 20160.00
GreHack CTF 20150.00

Team members

Team writeups

EventTaskAction
Insomni'hack 2022Illogical [400]read writeup
ph0wn 2021Megademo 2 [500]read writeup
Hack.lu CTF 2020Pwnhub Collection [334]read writeup
Hack.lu CTF 2020Bad Primes [193]read writeup
N1CTF 2020VSS [212]read writeup
SECCON 2020 Online CTFKoharu [144]read writeup
SECCON 2020 Online CTFThis is RSA [124]read writeup
OverTheWire Advent Bonanza 2019Genetic Mutation [142]read writeup
Hack.lu CTF 2019Baby Kernel 2 [202]read writeup
GreHack CTF 2018Forgotten Hardware [300]read writeup
GreHack CTF 2018Secret Keeper level 6 [501]read writeup
GreHack CTF 2018Secret Keeper level 5 [500]read writeup
GreHack CTF 2018Secret Keeper level 4 [300]read writeup
GreHack CTF 2018Secret Keeper level 3 [200]read writeup
GreHack CTF 2018Secret Keeper level 2 [100]read writeup
GreHack CTF 2018Secret Keeper level 1 [50]read writeup
TokyoWesterns CTF 4th 2018Revolutional Secure Angou [154]read writeup
Insomni'hack 2018S3cureLock 1 2 & 3 [500]read writeup
Insomni'hack teaser 2018FIle Vault [201]read writeup
Internetwache CTF 2016Exp 60 - EquationSolver [60]read writeup
Internetwache CTF 2016Code 90 - Dark Forest [90]read writeup
Internetwache CTF 2016Exp 80 - Remote Printer [80]read writeup
Internetwache CTF 2016Exp 70 - FlagStore [70]read writeup
Internetwache CTF 2016Exp 90 - Sh-ock [90]read writeup
Internetwache CTF 2016Code 60 - It's Prime Time [60]read writeup