Another brick in the SILO
A government agency. 40,000 dead devices. An official story that does not add up. Solve the cybersecurity challenges, find the flags and climb the leaderboard. Beginners welcome.
- Opens
- Fri 20 Nov 2026 · 8:00 pm AEDT
- Duration
- One week
- Countdown
- Prizes
- Australian residents
Physical access · Badge B-2291
Records 1–11 of 11 · Last sync 03:07:12Logged Wed 17:42 · J. Arden, HR
Result: GRANTED
| Time | Door | Badge | Result |
|---|---|---|---|
| Wed 17:42 | HR-OFFICE-1 | B-2291 | Returned |
| Wed 18:05 | LOBBY-N | B-1180 | Granted |
| Wed 22:31 | LOBBY-N | B-0974 | Granted |
| Thu 01:15 | PERIM-GATE | B-0974 | Exit |
| Thu 03:07 | BUILD-SRV-02 | B-2291 | Granted |
| Thu 08:58 | LOBBY-N | B-1180 | Granted |
| Thu 09:14 | BUILD-SRV-02 | SYSTEM | Push 2.8.1 |
| Thu 09:16 | NOC-2 | B-0331 | Granted |
| Thu 11:40 | EXEC-7 | B-0002 | Granted |
| Fri 06:00 | SYSTEM | n/a | 0 / 40,000 online |
| Mon 10:12 | EXEC-7 | B-0002 | Brief signed |
OFFICIALAccess: build servers
Fleet status · Firmware 2.8.1 rollout
Thu 09:14 AEDT · Push startedFirmware 2.8.1 · Integrity check
SHA-256 · Build #41319f2c4a1e07b3d58c 6e19a0f42d7b88c1 0aa3e95c4f61b2d7 8c03e1f9a6d4e41a9f2c4a1e07b3d58c 6e19a0f42d7b88c1 0aa3e95c4f61b2d7 3b7d90e2c5f8100cThe official story is tidy.
The evidence is not.
Firmware update 2.8.1
On Thursday morning SILO, the Secure Infrastructure and Logistics Office, pushed a routine firmware update to 40,000 of its devices across 17 countries. By Friday, every single one was a brick.
The failure was caused by a build error made by a junior engineer. She had already left the agency the week before.
No unauthorised access occurred. Her badge opened the build server the night before the push. The Minister has been briefed.
| Last day | The engineer hands her badge back. HR logs it, seals it in an envelope and locks it in a drawer. |
| +7 days, 03:07 | The night before the push, that same badge opens the door to the build server. |
| Thu 09:14 | Firmware 2.8.1 goes out to 40,000 devices in 17 countries. |
| Fri | Every single device is a brick. |
| After | A ministerial brief is signed off. The file is closed. |
The world moved on.
You did not.
e2 Cyber and the Safer Internet Project dare you to reopen the file. Whether you are new to CTFs or a seasoned red teamer, SILO will put your skills to the test. Will you find the brick that does not fit?
Firmware analysis
Tear apart firmware binaries that do not match their own build logs.
Blockchain forensics
Follow a money trail across a blockchain someone hoped nobody would read.
Social engineering
Talk your way through an agency that has already closed the file.
| 1st | A financial voucher |
| 2nd | A 12-month Safer Internet Project subscription |
| 3rd | A one-hour career consultation with e2 Cyber |
Prizes are for Australian residents currently living in Australia, so tick that box when you register. Everyone else can still compete for the leaderboard.
- Opens
- Fri 20 Nov 2026
8:00 pm AEDT - Duration
- One week to complete
all challenges - Closes
- Fri 27 Nov 2026
8:00 pm AEDT - Format
- Online capture the flag,
individual players - Who can play
- Anyone, beginners
to seasoned red teamers - Organised by
- The Safer Internet Project
× e2 Cyber
TSIP helps people build careers and consultancies in AI and cybersecurity. Co-organiser of this CTF.
tsip.app →e2 Cyber is a cyber security recruitment agency placing professionals with Australian employers, from entry level to leadership. Co-organiser of this CTF.
e2cyber.com.au →