Chaos provides a reverse shell connection on 8338/TCP, encrypted via AES.2
tool
Chaos S0220
- Type
- malware
- Platform
- Linux
- Created
- 18 April 2018
- Last modified
- 25 April 2025
Chaos is Linux malware that compromises systems by brute force attacks against SSH services. Once installed, it provides a reverse shell to its controllers, triggered by unsolicited packets. [1]
5
TechniquesBottom 23%
5
Tactics41st pct
0
Threat groupsNone recorded
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0220
After initial compromise, Chaos will download a second stage to establish a more permanent presence on the affected system.3
Chaos conducts brute force attacks against SSH services to gain initial access.4
Chaos provides a reverse shell is triggered upon receipt of a packet with a special string, sent to any port.5
Chaos provides a reverse shell connection on 8338/TCP, encrypted via AES.6
Standing S0220
Reach is how much of ATT&CK this tool touches. Coverage is how well defended each thing it does is, as a median per technique rather than a total — a total would just restate the reach. Each figure is ranked against all 825 ATT&CK software entries only where that population actually spreads. Where most of the population shares one value, a percentile would rank the tie instead of the entity, so the raw value is shown and no rank is claimed.
Reach
Techniques5Bottom 23%
23rd percentile · 77% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics541st pct
41st percentile · 59% of 825 ATT&CK software entries have more tactics spanned.
Threat groups061% tie · 22 values
61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.
Campaigns085% tie · 8 values
85% of the population shares a single value across only 8 distinct values, so a percentile here would rank the tie, not the entity.
Coverage
Rules / technique0medBottom 1%
1st percentile · 99% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique0med
Detection coverage S0220
80 distinct rules cover the 5 techniques recorded for this tool. 46 Sigma · 34 Splunk.
2 covered by at least one rule3 with no coverage80 distinct rules in total
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