The C2 server used by XTunnel provides a port number to the victim to use as a fallback in case the connection closes on the currently used port.4
tool
XTunnel S0117
- Type
- malware
- Platform
- Windows
- Created
- 31 May 2017
- Last modified
- 25 April 2025
XTunnel a VPN-like network proxy tool that can relay traffic between a C2 server and a victim. It was first seen in May 2013 and reportedly used by APT28 during the compromise of the Democratic National Committee. [1] [2] [3]
8
Techniques38th pct
5
Tactics41st pct
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 S0117
A version of XTunnel introduced in July 2015 obfuscated the binary using opaque predicates and other techniques in a likely attempt to obfuscate it and bypass security products.5
A version of XTunnel introduced in July 2015 inserted junk code into the binary in a likely attempt to obfuscate it and bypass security products.6
Standing S0117
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
Techniques838th pct
38th percentile · 62% 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 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 / technique30.5medTop 21%
79th percentile · 79% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique3med
Detection coverage S0117
278 distinct rules cover the 8 techniques recorded for this tool. The 281 technique-to-rule mappings resolve to 278 distinct rules, because one rule can cover several techniques. 221 Sigma · 57 Splunk.
7 covered by at least one rule1 with no coverage278 distinct rules in total
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