StarProxy has utilized TLS record headers in network packets to impersonate various versions of TLS protocols to blend in with legitimate network traffic. StarProxy used FakeTLS to communicate with its C2 server.2
tool
StarProxy S1227
- Type
- malware
- Platform
- Windows
- Created
- 21 July 2025
- Last modified
- 21 October 2025
StarProxy is custom malware used by Mustang Panda as a post-compromise tool, to enable proxying of traffic between the infected machine and other machines on the same network. [1]
9
Techniques44th pct
4
Tactics32nd 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 S1227
StarProxy has used the command line for execution of commands.3
StarProxy has proxied traffic between infected devices and their C2 servers.4
StarProxy has used TCP for C2 communications to target IPs or domains. StarProxy contained code to support both UDP and TCP connections.5
StarProxy has used native windows API calls such as GetLocalTime() to retrieve system data.6
StarProxy has utilized the windows API call GetLocalTime() to retrieve a SystemTime structure to generate a seed value.7
Standing S1227
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
Techniques944th pct
44th percentile · 56% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics432nd pct
32nd percentile · 68% 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 / technique8medBottom 11%
11th percentile · 89% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique4med
Detection coverage S1227
306 distinct rules cover the 9 techniques recorded for this tool. The 308 technique-to-rule mappings resolve to 306 distinct rules, because one rule can cover several techniques. 235 Sigma · 71 Splunk.
8 covered by at least one rule1 with no coverage306 distinct rules in total
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