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

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Participated in CTF events

Overall rating place: 32 with 121.442 pts in 2020

Country place: 1

PlaceEventCTF pointsRating points
43VolgaCTF 2020 Qualifier1260.000010.689*
12Securinets CTF Quals 202013097.000023.243
10CONFidence CTF 2020 Teaser1181.000018.955
6zer0pts CTF 202010244.000024.600
746UTCTF 2020101.00000.115
17Pragyan CTF 20201160.000010.347
2Codegate CTF 2020 Preliminary7678.000021.931
21Insomni'hack teaser 2020377.000011.562

Overall rating place: 2 with 1035.188 pts in 2019

Country place: 1

PlaceEventCTF pointsRating points
11hxp 36C3 CTF3328.000022.857
9justCTF 20193081.000015.112
7HITCON CTF 2019 Final7954.980019.801
4Real World CTF 2019 Finals857.000015.892
16CTFZone 2019 Quals2090.000013.114
3Trend Micro CTF 2019 - Raimund Genes Cup - The Final1662.000028.987
123RuCTFE 20195.37000.621
6ASIS CTF Finals 20193721.000077.247
9Dragon CTF 2019980.000052.462
2Pwn2Win CTF 20193737.000060.626
7Google Capture The Flag 2019 (Finals)1350.000020.196
4CODE BLUE CTF 2019848.000011.432
3BackdoorCTF 20193080.000033.450
10TastelessCTF 20191607.000010.446 CTF 20196777.000070.660
7SECCON 2019 Online CTF5986.000046.126
2HITCON CTF 2019 Quals5731.0000138.965
2BSides Delhi CTF 201915519.000044.015
4PwnThyBytes CTF 20195743.000026.155
3Teaser Dragon CTF 20192224.000033.622
8Real World CTF 2019 Quals1665.000018.331
28CSAW CTF Qualification Round 20193001.000024.918
20DefCamp CTF Qualification 20192155.000012.282
9Trend Micro CTF 2019 - Raimund Genes Cup - Online Qualifier2400.00004.671
73Affinity CTF 2019 - Quals651.00002.206
2N1CTF 20195589.000031.683
1TokyoWesterns CTF 5th 20193690.0000194.160
3HackCon 20196582.000026.858
3De1CTF 20198852.000027.239
35CyBRICS CTF Quals 2019737.00005.587
7WCTF 2019 ONLINE600.00000.849
12ISITDTU CTF 2019 Quals6875.000012.512
8Google Capture The Flag 2019 (Quals)3979.000094.609
20CTF/TCTF 2019 Finals5091.0000148.931
2Facebook CTF 201921511.000035.341
1Security Fest 20198326.000086.620
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 20192275.00006.675
10Midnight Sun CTF 2019 Quals5043.000018.918
9VolgaCTF 2019 Qualifier2325.000024.107
120CTF/TCTF 2019 Quals3769.000062.226
2CONFidence CTF 2019 Teaser2365.000034.166
1Pragyan CTF 20193275.000044.860
41TAMUctf 1915795.000026.738
6STEM CTF: Cyber Challenge 20192450.000023.184
27Insomni'hack teaser 2019501.00009.900

Overall rating place: 24 with 363.188 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 20183506.00006.886
7hxp CTF 20181872.000029.098
1Pwn2Win CTF 20184462.000058.280
32BCTF 20181074.00001.500
5ASIS CTF Finals 20183421.000039.891
17DefCamp CTF Finals 20181154.00003.004
11SECCON 2018 Online CTF3852.000026.163 CTF 20182018.000030.289
14InCTF 20183741.00006.171
2Hackover CTF 20185702.000035.790
12Teaser Dragon CTF 20181472.000018.461
7DefCamp CTF Qualification 20182065.000016.099
6Trend Micro CTF 2018 - Raimund Genes Cup - Online Qualifier4300.000015.787
234CSAW CTF Qualification Round 2018826.00004.598
15HackIT CTF 20183969.00008.409
228IceCTF 20181685.00007.522
53CTFZone 2018 Quals369.00002.126
32Google Capture The Flag 2018 (Quals)1466.000019.309
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 Quals9582.000031.469
3UIUCTF 20182502.000021.917
6610CTF/TCTF 2018 Quals16.00000.187
18Nuit du Hack CTF Quals 20182451.000031.044
111Securinets CTF Quals 2018450.00001.649
6VolgaCTF 2018 Quals2610.000024.325
10BackdoorCTF 20181800.000021.949
51ångstromCTF 20182260.000014.208
19N1CTF 20182491.00006.999
1Pragyan CTF 20182800.000013.680
12SECCON 2017 Final International competition1435.00008.679

Overall rating place: 63 with 175.110 pts in 2017

Country place: 3

PlaceEventCTF pointsRating points
3634C3 CTF497.00008.977
12SECCON 2017 Online CTF5200.000026.875
10HITCON CTF 2017 Final15225.890016.911
9hxp CTF 20171439.000012.255
9DefCamp CTF Finals 20172615.000012.285
21HITCON CTF 2017 Quals2785.000037.783
6DefCamp CTF Qualification 20171983.000011.239
158CSAW CTF Qualification Round 20171351.00005.330
29Tokyo Westerns CTF 3rd 20171058.000014.193
27HackIT CTF 20171070.00005.384
15CTFZone 20172061.00005.172
111PoliCTF 2017237.00001.318
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 2017201.00003.487
38BCTF 20171345.00002.778
79VolgaCTF 2017 Quals950.00005.337
420CTF 2017 Quals1099.00008.778
180Pragyan CTF 2017310.00001.008
46Boston Key Party CTF 20171151.000015.998
22Codegate 2017 prequals1680.000016.215

Overall rating place: 49 with 272.888 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 72430.000015.733
43SECCON 2016 Online CTF1800.00009.005
31Juniors CTF 20164000.00000.000
12RC3 CTF 20165140.000014.586
4Qiwi-Infosec CTF-20166600.000016.963
9DefCamp CTF Finals 20162957.000016.519
27Hack The Vote 20161951.00008.835
19EKOPARTY CTF 20162350.000022.156 CTF 2016801.000020.451
14HITCON CTF 2016 Quals2850.000038.470
10TUM CTF 20162523.000014.079
15DefCamp CTF Qualification 20161400.00007.259
42CSAW CTF Qualification Round 20162826.000013.843
29WhiteHat Contest 12500.00002.730
76Tokyo Westerns/MMA CTF 2nd 2016790.00007.139
222Hackcon 2016501.00002.493
16IceCTF 20163516.00000.000
41Trend Micro CTF 2016 Online Qualifier1000.00006.339
132ASIS CTF Quals 2016110.00001.480
46Google Capture The Flag 20161755.00008.639
5660CTF 2016 Quals1.00000.581
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

Balsn CTF 201925.00

Team members

Team writeups

CONFidence CTF 2020 TeaserAngry Defender [448]read writeup
CONFidence CTF 2020 TeaserTemple JS [162]read writeup
CONFidence CTF 2020 TeaserCat web [157]read writeup
zer0pts CTF 2020grimoire [671]read writeup
zer0pts CTF 2020protrude [525]read writeup
zer0pts CTF 2020MusicBlog [653]read writeup
Codegate CTF 2020 Preliminarymalicious [702]read writeup
Codegate CTF 2020 PreliminaryORM-APP [810]read writeup
Codegate CTF 2020 Preliminaryverifier [702]read writeup
Codegate CTF 2020 PreliminaryPolynomials [810]read writeup
Codegate CTF 2020 PreliminaryMUNCH [750]read writeup
Codegate CTF 2020 PreliminaryHalfFeed [670]read writeup
Codegate CTF 2020 PreliminaryCSP [702]read writeup
Codegate CTF 2020 Preliminarybabyllvm [702]read writeup
hxp 36C3 CTFincluder [556]read writeup
hxp 36C3 CTFbacon [213]read writeup
hxp 36C3 CTFpeerreviewed [149]read writeup
HITCON CTF 2019 QualsRevenge of Welcome [105]read writeup
HITCON CTF 2019 QualsVery Simple Haskell [200]read writeup
HITCON CTF 2019 QualsLost key again [334]read writeup
HITCON CTF 2019 QualsEV3 Arm [221]read writeup
HITCON CTF 2019 QualsEV3 Player [207]read writeup
HITCON CTF 2019 QualsheXDump [202]read writeup
HITCON CTF 2019 QualsOne Punch Man [292]read writeup
HITCON CTF 2019 QualsCrypto in the Shell [284]read writeup
HITCON CTF 2019 QualsLazyHouse [300]read writeup
HITCON CTF 2019 Quals? Trick or Treat ? [234]read writeup
HITCON CTF 2019 QualsNetatalk [371]read writeup
HITCON CTF 2019 QualsEmojiiiVM [236]read writeup
HITCON CTF 2019 QualsPoE I - Luna [284]read writeup
HITCON CTF 2019 QualsBuggy .NET [315]read writeup
HITCON CTF 2019 QualsLuatic [230]read writeup
HITCON CTF 2019 QualsGoGo PowerSQL [296]read writeup
HITCON CTF 2019 QualsBounty Pl33z [255]read writeup
HITCON CTF 2019 Qualssuicune [305]read writeup
Balsn CTF 2019RCE Auditor [1000]read writeup
Balsn CTF 2019securenote [1000]read writeup
Balsn CTF 2019Machbook [1000]read writeup
Balsn CTF 2019 Images and Words [1000]read writeup
PwnThyBytes CTF 2019LOTR read writeup
PwnThyBytes CTF 2019Avec read writeup
Teaser Dragon CTF 2019rsachained [312]read writeup
Teaser Dragon CTF 2019BabyPDF [121]read writeup
Teaser Dragon CTF 2019rms [126]read writeup
Teaser Dragon CTF 2019Trusted Loading 2 [470]read writeup
Teaser Dragon CTF 2019Trusted Loading [432]read writeup
Real World CTF 2019 QualshCorem [304]read writeup
Real World CTF 2019 Qualscrawl box [401]read writeup
Real World CTF 2019 QualsMoP [224]read writeup
Real World CTF 2019 Qualsanti-anti-virus [290]read writeup
Real World CTF 2019 QualsfaX senDeR [224]read writeup
Real World CTF 2019 QualsAcross the Great Wall [378]read writeup
DefCamp CTF Qualification 2019crack me username read writeup
DefCamp CTF Qualification 2019Eye Of The Tiger read writeup
Trend Micro CTF 2019 - Raimund Genes Cup - Online QualifierMobile 100 [100]read writeup
Trend Micro CTF 2019 - Raimund Genes Cup - Online QualifierExploit 400 ChakraCore [400]read writeup
Trend Micro CTF 2019 - Raimund Genes Cup - Online QualifierExploit 300 (Java jail) [300]read writeup
Trend Micro CTF 2019 - Raimund Genes Cup - Online QualifierIoT 200 [200]read writeup
TokyoWesterns CTF 5th 2019printf [216]read writeup
TokyoWesterns CTF 5th 2019 PHP Note [320]read writeup
TokyoWesterns CTF 5th 2019Multi Heap [279]read writeup
TokyoWesterns CTF 5th 2019Asterisk-Alloc [221]read writeup
TokyoWesterns CTF 5th 2019Oneline Calc [314/500]read writeup
TokyoWesterns CTF 5th 2019gnote [461]read writeup
TokyoWesterns CTF 5th 2019Holy Grail War [314]read writeup
TokyoWesterns CTF 5th 2019Slack emoji converter Kai [478]read writeup
Google Capture The Flag 2019 (Quals)sandbox-caas [363]read writeup
Google Capture The Flag 2019 (Quals)gLotto [288]read writeup
Google Capture The Flag 2019 (Quals)minetest [288]read writeup
Google Capture The Flag 2019 (Quals)Remote Control [363]read writeup
Google Capture The Flag 2019 (Quals)Dialtone [189]read writeup
Google Capture The Flag 2019 (Quals)Flaggy Bird [231]read writeup
Google Capture The Flag 2019 (Quals)Malvertising [140]read writeup
0CTF/TCTF 2019 FinalsTCTF Hotel Booking System read writeup
0CTF/TCTF 2019 Finals114514 CALCALCALC read writeup
0CTF/TCTF 2019 FinalsWallbreaker (not very) Hard read writeup
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