ComRAT can check the default browser by querying HKCR\http\shell\open\command.4
tool
ComRAT S0126
- Type
- malware
- Platform
- Windows
- Created
- 31 May 2017
- Last modified
- 16 April 2025
ComRAT is a second stage implant suspected of being a descendant of Agent.btz and used by Turla. The first version of ComRAT was identified in 2007, but the tool has undergone substantial development for many years since.[1][2][3]
22
TechniquesTop 16%
8
TacticsTop 20%
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 S0126
ComRAT has encrypted its virtual file system using AES-256 in XTS mode.56
ComRAT has embedded a XOR encrypted communications module inside the orchestrator module.78
ComRAT has used encryption and base64 to obfuscate its orchestrator code in the Registry. ComRAT has also used encoded PowerShell scripts.910
ComRAT has stored encrypted orchestrator code and payloads in the Registry.1112
ComRAT has been programmed to sleep outside local business hours (9 to 5, Monday to Friday).13
Standing S0126
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
Techniques22Top 16%
84th percentile · 84% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics8Top 20%
80th percentile · 80% of 825 ATT&CK software entries have this many tactics spanned or fewer.
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 / technique12medBottom 21%
21st percentile · 79% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique4med
Detection coverage S0126
765 distinct rules cover the 22 techniques recorded for this tool. The 917 technique-to-rule mappings resolve to 765 distinct rules, because one rule can cover several techniques. 531 Sigma · 234 Splunk.
20 covered by at least one rule2 with no coverage765 distinct rules in total
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