Also known as
  • Negative Nine Security
  • Neg9!


Twitter: @Neg9

Other: irc://

Sign in to join the team.

Based primarily in Seattle and the Bay Area. More info @

Participated in CTF events

Overall rating place: 10934 with 2.811 pts in 2021

Country place: 437

PlaceEventCTF pointsRating points
174DEF CON CTF Qualifier 2021101.00002.811

Overall rating place: 5555 with 3.355 pts in 2019

Country place: 296

PlaceEventCTF pointsRating points
279DEF CON CTF Qualifier 2019202.00003.355

Overall rating place: 997 with 21.241 pts in 2018

Country place: 97

PlaceEventCTF pointsRating points
2OpenCTF 20182982.00000.000
49DEF CON CTF Qualifier 2018864.000016.074
110PlaidCTF 2018251.00005.167

Overall rating place: 205 with 71.488 pts in 2017

Country place: 25

PlaceEventCTF pointsRating points
172CSAW CTF Qualification Round 20171226.00004.838
189HackIT CTF 2017100.00000.537
345SECUINSIDE CTF Quals 201730.00000.149
42DEF CON CTF Qualifier 2017690.000018.500
66PlaidCTF 2017787.000013.370
265BCTF 201764.00000.187
13TAMUctf 20173505.000018.436
87FIT-HACK CTF 20171700.00008.045
94ASIS CTF Quals 2017377.00003.034
102Nuit du Hack CTF Quals 2017430.00004.391

Overall rating place: 112 with 133.156 pts in 2016

Country place: 12

PlaceEventCTF pointsRating points
118HITCON CTF 2016 Quals350.00004.704
13CSAW CTF Qualification Round 20164026.000020.780
2OpenCTF 20163746.000027.532
37DEF CON CTF Qualifier 20161302.000026.722
13Google Capture The Flag 20163250.000016.849
36PlaidCTF 20161377.000029.721
237BCTF 201610.00000.204
152Boston Key Party CTF 201610.00006.645

Overall rating place: 58 with 201.227 pts in 2015

Country place: 9

PlaceEventCTF pointsRating points
62FAUST CTF 20151306.00000.244
312SECCON 2015 Online CTF500.00002.468 CTF 20151940.000019.894
55HITCON CTF 2015 Quals401.00004.887
22Defcamp CTF Qualification 20153200.00007.327
13CSAW CTF Qualification Round 20156360.000040.161
2OpenCTF 20152710.000015.537
157PoliCTF 2015450.00002.921
54DEF CON CTF Qualifier 201513.000022.193
47ASIS CTF Quals 20151226.00007.034
125VolgaCTF 2015 Quals750.00003.101
47Teaser CONFidence CTF 2015600.00001.356
36PlaidCTF 20151441.000025.722
161BCTF 2015210.00001.919
38B-Sides Vancouver 2015510.00001.076
57Codegate CTF Preliminary 2015500.00005.400
20Boston Key Party CTF 20153345.000034.140
113Ghost in the Shellcode 2015350.00005.845

Overall rating place: 66 with 176.057 pts in 2014

Country place: 10

PlaceEventCTF pointsRating points
162SECCON CTF 2014 Online Qualifications1200.00004.371
288Defcamp CTF Qualification 2014500.00000.488
140ASIS CTF Finals 2014250.00001.948
24CSAW CTF Qualification Round 20144660.000032.942
1OpenCTF 20144500.000050.000
54DEF CON CTF Qualifier 20149.000018.197
34PlaidCTF 20141816.000020.132
58Olympic CTF Sochi 2014450.00006.177
32PHD CTF Quals 201424300.000022.097
37Ghost in the Shellcode 2014976.000019.704

Overall rating place: 99 with 132.363 pts in 2013

Country place: 18

PlaceEventCTF pointsRating points
547CSAW CTF Qualification Round 2013950.00004.707
27DEF CON CTF Qualifier 201348.000060.933
257SECUINSIDE CTF Quals 2013100.00001.221
15PlaidCTF 20132070.000050.542
35Ghost in the Shellcode 2013800.000014.959

Overall rating place: 65 with 178.503 pts in 2012

Country place: 14

PlaceEventCTF pointsRating points
5029c3 CTF400.00005.010 CTF 2012800.00009.052
3CSAW CTF Qualification Round 20128500.000053.333
18DEF CON CTF Qualifier 20123600.000079.025
22PlaidCTF 20121743.000032.083
121ForbiddenBITS CTF 20120.00000.000

Overall rating place: 56 with 96.258 pts in 2011

PlaceEventCTF pointsRating points
51PHD CTF Quals 20110.00000.000
10CSAW CTF Qualification Round 20119300.00000.000
26DEF CON CTF Qualifier 20112500.00000.000

Organized CTF events

OpenCTF 20190.00

Team members

Team writeups

OpenCTF 2018Scoreboard Bug Bounty [1337]read writeup
OpenCTF 2018stegoxor [300]read writeup
OpenCTF 2018Forbidden Folly 1 [50]read writeup
OpenCTF 2018Forbidden Folly 2 [50]read writeup
OpenCTF 2018HeadOn [50]read writeup
PlaidCTF 2017Echo [200]read writeup
OpenCTF 2016apprentice_www [300]read writeup
OpenCTF 2016neophyte_cgc [300]read writeup
DEF CON CTF Qualifier 2016feedme [1]read writeup
Google Capture The Flag 2016rsacalc [300]read writeup CTF 2015Checkcheckcheck [150+80]read writeup
Defcamp CTF Qualification 2015Custom function engineering (Crypto 300) [300]read writeup
CSAW CTF Qualification Round 2015wyvern [500]read writeup
DEF CON CTF Qualifier 2015accesscontrol [1]read writeup
CSAW CTF Qualification Round 2015Precision [100]read writeup
OpenCTF 2015Veritable Buzz 1 [300]read writeup
OpenCTF 2015absence [200]read writeup
OpenCTF 2015signfaster / signfasterer / signfastest [200, 400, 100]read writeup
OpenCTF 2015Sigil of Darkness [200]read writeup
OpenCTF 2015Runic Power [200]read writeup
OpenCTF 2015superserial [100]read writeup
OpenCTF 2015signfaster / signfasterer / signfastest [200, 400, 100]read writeup
OpenCTF 2015dnsh [100]read writeup
OpenCTF 2015magic_eye.dat [50]read writeup
OpenCTF 2015Enhance [50]read writeup
DEF CON CTF Qualifier 2015catwestern [1]read writeup
ASIS CTF Quals 2015KeyLead [150]read writeup
ASIS CTF Quals 2015Grids [300]read writeup
ASIS CTF Quals 2015Leach [250]read writeup
PlaidCTF 2015qttpd [950]read writeup
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