SnappyTCP creates the reverse shell using a pthread spawning a bash shell.2
tool
SnappyTCP S1163
- Type
- malware
- Platform
- Linux
- Created
- 20 November 2024
- Last modified
- 7 January 2025
SnappyTCP is a web shell used by Sea Turtle between 2021 and 2023 against multiple victims. SnappyTCP appears to be based on a public GitHub project that has since been removed from the code-sharing site. SnappyTCP includes a simple reverse TCP shell for Linux and Unix environments with basic command and control capabilities.[1]
5
TechniquesBottom 23%
3
TacticsBottom 21%
1
Threat groupunranked
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S1163
SnappyTCP connects to the command and control server via a TCP socket using HTTP.3
SnappyTCP spawns a reverse TCP shell following an HTTP-based negotiation.4
SnappyTCP is a reverse TCP shell with command and control capabilities used for persistence purposes.5
SnappyTCP can use OpenSSL and TLS certificates to encrypt traffic.6
Standing S1163
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.
Tactics3Bottom 21%
21st percentile · 79% of 825 ATT&CK software entries have more tactics spanned.
Threat group161% 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 / technique30medTop 22%
78th percentile · 78% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique3med
Detection coverage S1163
149 distinct rules cover the 5 techniques recorded for this tool. The 151 technique-to-rule mappings resolve to 149 distinct rules, because one rule can cover several techniques. 99 Sigma · 50 Splunk.
5 covered by at least one rule149 distinct rules in total
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