Balsn is a CTF team from Network Security Lab of National Taiwan University

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Participated in CTF events

Overall rating place: 2 with 686.879 pts in 2019

Country place: 1

PlaceEventCTF pointsRating points
8Google Capture The Flag 2019 (Quals)3979.000094.776*
20CTF/TCTF 2019 Finals5091.0000148.931
2Facebook CTF 201921511.000035.152
1Security Fest 20198326.000081.640
3RCTF 20198359.000038.147
3*CTF 201911258.000031.542
6ASIS CTF Quals 20193450.000048.157
4PlaidCTF 20194707.0000101.143
9AceBear Security Contest 20193166.00009.924
31SwampCTF 20192275.00006.696
10Midnight Sun CTF 2019 Quals5043.000018.911
9VolgaCTF 2019 Qualifier2325.000023.344
120CTF/TCTF 2019 Quals3769.000062.226
2CONFidence CTF 2019 Teaser2365.000034.166
1Pragyan CTF 20193275.000042.540
41TAMUctf 1915795.000026.786
6STEM CTF: Cyber Challenge 20192450.000023.075
27Insomni'hack teaser 2019501.00009.922

Overall rating place: 24 with 357.688 pts in 2018

Country place: 3

PlaceEventCTF pointsRating points
10SECCON 2018 Final International competition5334.000020.559
8Trend Micro CTF 2018 - Raimund Genes Cup - The Final2390.000010.362
47X-MAS CTF 20183506.00006.895
7hxp CTF 20181872.000029.098
1Pwn2Win CTF 20184462.000058.520
32BCTF 20181074.00001.500
5ASIS CTF Finals 20183421.000039.989
17DefCamp CTF Finals 20181154.00003.433
11SECCON 2018 Online CTF3852.000026.163
22Hack.lu CTF 20182018.000030.259
14InCTF 20183741.00006.171
2Hackover CTF 20185702.000035.940
12Teaser Dragon CTF 20181472.000018.461
7DefCamp CTF Qualification 20182065.000016.576
6Trend Micro CTF 2018 - Raimund Genes Cup - Online Qualifier4300.000015.787
234CSAW CTF Qualification Round 2018826.00004.598
15HackIT CTF 20183969.00008.409
228IceCTF 20181685.00007.558
53CTFZone 2018 Quals369.00002.134
32Google Capture The Flag 2018 (Quals)1466.000019.338
35Security Fest CTF309.00004.731
17RCTF 20185128.000012.418
12PlaidCTF 20182151.000044.959
7ASIS CTF Quals 20183021.000036.206
7*CTF 20185938.000016.338
2HITB-XCTF GSEC CTF 2018 Quals9582.000025.637
3UIUCTF 20182502.000021.917
6610CTF/TCTF 2018 Quals16.00000.187
18Nuit du Hack CTF Quals 20182451.000030.917
111Securinets CTF Quals 2018450.00001.649
6VolgaCTF 2018 Quals2610.000024.325
10BackdoorCTF 20181800.000021.815
51angstromCTF 20182260.000014.208
19N1CTF 20182491.00007.004
1Pragyan CTF 20182800.000013.680
12SECCON 2017 Final International competition1435.00008.679

Overall rating place: 63 with 172.799 pts in 2017

Country place: 3

PlaceEventCTF pointsRating points
3634C3 CTF497.00008.977
12SECCON 2017 Online CTF5200.000026.875
10HITCON CTF 2017 Final15225.890015.123
9hxp CTF 20171439.000012.126
9DefCamp CTF Finals 20172615.000012.285
21HITCON CTF 2017 Quals2785.000037.887
6DefCamp CTF Qualification 20171983.000011.136
158CSAW CTF Qualification Round 20171351.00005.330
29Tokyo Westerns CTF 3rd 20171058.000014.180
27HackIT CTF 20171070.00005.384
15CTFZone 20172061.00005.190
111PoliCTF 2017237.00001.273
22SECUINSIDE CTF Quals 2017956.00003.590
22Trend Micro CTF 2017 - Raimund Genes Cup - Online Qualifier2200.000010.757
123Google Capture The Flag 2017 (Quals)340.00001.515
213PlaidCTF 2017201.00003.471
38BCTF 20171345.00002.778
79VolgaCTF 2017 Quals950.00005.383
420CTF 2017 Quals1099.00008.789
180Pragyan CTF 2017310.00001.008
46Boston Key Party CTF 20171151.000015.998
22Codegate 2017 prequals1680.000015.831
108AlexCTF1640.000011.356

Overall rating place: 49 with 272.072 pts in 2016

Country place: 4

PlaceEventCTF pointsRating points
2533C3 CTF2100.000030.867
148The 318br, DESEC, and SucuriHC Capture The Flag (3DSCTF)600.00001.671
30SharifCTF 72430.000015.700
43SECCON 2016 Online CTF1800.00009.005
31Juniors CTF 20164000.00000.000
12RC3 CTF 20165140.000014.453
4Qiwi-Infosec CTF-20166600.000016.963
9DefCamp CTF Finals 20162957.000016.519
27Hack The Vote 20161951.00008.835
19EKOPARTY CTF 20162350.000022.233
49Hack.lu CTF 2016801.000020.013
14HITCON CTF 2016 Quals2850.000038.575
10TUM CTF 20162523.000013.931
15DefCamp CTF Qualification 20161400.00007.193
42CSAW CTF Qualification Round 20162826.000013.843
29WhiteHat Contest 12500.00002.730
76Tokyo Westerns/MMA CTF 2nd 2016790.00007.133
222Hackcon 2016501.00002.343
16IceCTF 20163516.00000.000
41Trend Micro CTF 2016 Online Qualifier1000.00006.339
132ASIS CTF Quals 2016110.00001.457
46Google Capture The Flag 20161755.00008.639
5660CTF 2016 Quals1.00000.582
118Boston Key Party CTF 201613.00008.633
62Internetwache CTF 20161820.00004.414

Overall rating place: 350 with 27.800 pts in 2015

Country place: 10

PlaceEventCTF pointsRating points
2389447 Security Society CTF 2015162.00001.161
77RCTF 2015 Quals560.00003.415
56HITCON CTF 2015 Quals401.00004.871
36Trend Micro CTF Asia Pacific & Japan 2015 Online Qualifier2205.00008.152
174CSAW CTF Qualification Round 20151710.000010.201

Organized CTF events

NameWeight
Balsn CTF 20190.00

Team members

Team writeups

EventTaskAction
Facebook CTF 2019raddest_db [998]read writeup
Facebook CTF 2019rusty_shop [983]read writeup
Facebook CTF 2019nomoreseacrypt [985]read writeup
Facebook CTF 2019hr_admin_module [1000]read writeup
Facebook CTF 2019events [957]read writeup
Facebook CTF 2019rceservice [919]read writeup
Security Fest 2019Locksmith [537]read writeup
Security Fest 2019Darkwebmessageboard [424]read writeup
Security Fest 2019cactus read writeup
RCTF 2019ManyNotes [526]read writeup
RCTF 2019chat [869]read writeup
RCTF 2019babyre2 [425]read writeup
RCTF 2019syscall_interface [769]read writeup
RCTF 2019babyre1 [338]read writeup
RCTF 2019DontEatMe [540]read writeup
RCTF 2019asm [800]read writeup
RCTF 2019random [740]read writeup
RCTF 2019f(x) [769]read writeup
RCTF 2019baby_aes [740]read writeup
*CTF 2019heap master [714]read writeup
*CTF 2019blindpwn [303]read writeup
*CTF 2019996game [740]read writeup
*CTF 2019mywebsql [210]read writeup
*CTF 2019Matr1x [740]read writeup
*CTF 2019Obfuscating Macros II [714]read writeup
*CTF 2019fanoGo [425]read writeup
*CTF 2019yy [555]read writeup
*CTF 2019babyprng2 [243]read writeup
*CTF 2019babyprng [206]read writeup
*CTF 2019notcurves [363]read writeup
*CTF 2019notfeal [740]read writeup
*CTF 2019homebrewEvtLoop-- [689]read writeup
*CTF 2019homebrewEvtLoop# [800]read writeup
PlaidCTF 2019Spectre [666]read writeup
PlaidCTF 2019big maffs [250]read writeup
PlaidCTF 2019SPlaid Cypress [600]read writeup
Midnight Sun CTF 2019 QualsTulpan257 [451]read writeup
Midnight Sun CTF 2019 QualsCloudb [893]read writeup
Midnight Sun CTF 2019 Qualshfs-vm [287]read writeup
VolgaCTF 2019 QualifierPyTFM [100]read writeup
VolgaCTF 2019 QualifierJAC II [250]read writeup
VolgaCTF 2019 QualifierShop [100]read writeup
VolgaCTF 2019 QualifierShop V.2 [100]read writeup
VolgaCTF 2019 QualifierBeard Party [500]read writeup
VolgaCTF 2019 QualifierShifter [150]read writeup
VolgaCTF 2019 QualifierHigher [100]read writeup
0CTF/TCTF 2019 Qualszer0mi [611]read writeup
0CTF/TCTF 2019 Qualssanitize [282]read writeup
0CTF/TCTF 2019 Qualsfixed_point read writeup
0CTF/TCTF 2019 QualsElements [107]read writeup
0CTF/TCTF 2019 QualsWallbreaker Easy [157]read writeup
0CTF/TCTF 2019 QualsGhost pepper [125]read writeup
0CTF/TCTF 2019 Qualsplang [354]read writeup
0CTF/TCTF 2019 Qualszerotask [132]read writeup
0CTF/TCTF 2019 QualsIf on a winters night a traveler [234]read writeup
0CTF/TCTF 2019 Qualsbaby_aegis [323]read writeup
0CTF/TCTF 2019 Qualsflropyd [366]read writeup