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NorthLedger has identified unusual activity on one of its Linux jump servers, nl-jump01.
The server is exposed to regular SSH traffic, making it difficult to separate routine noise from genuine malicious activity. You have been provided with authentication, system, audit and shell history logs.
Your task is to identify the point of compromise and reconstruct what happened.
| Lab Released | 2026-07-23 18:00:00 | |
 noother got 1st blood |
2026-07-23 23:57:13 | |
 rayaseiren got 2nd blood |
2026-07-24 22:46:09 | |
 koioshitai got 3rd blood |
2026-07-26 02:57:45 | |
 G_Smith got 4th blood |
2026-08-04 17:23:30 | |
 LACiA got 5th blood |
2026-08-14 01:34:07 |
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