CorKLOG has encrypted collected contents using RC4.2 CorKLOG has also utilized XOR encrypted strings.2
tool
CorKLOG S1235
- Type
- malware
- Platform
- Windows
- Created
- 12 September 2025
- Last modified
- 21 October 2025
CorKLOG is a keylogger known to be leveraged by Mustang Panda and was first observed utilized in 2024. CorKLOG is delivered through a RAR archive (e.g., src.rar), which contains two files: an executable (lcommute.exe) and the CorKLOG DLL (mscorsvc.dll). CorKLOG has established persistence on the system by creating services or with scheduled tasks.[1]
8
Techniques38th pct
7
Tactics68th 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 S1235
Standing S1235
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.
Tactics768th pct
68th percentile · 68% 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 / technique12.5medBottom 22%
22nd percentile · 78% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique6.5med
Detection coverage S1235
287 distinct rules cover the 8 techniques recorded for this tool. The 292 technique-to-rule mappings resolve to 287 distinct rules, because one rule can cover several techniques. 220 Sigma · 67 Splunk.
8 covered by at least one rule287 distinct rules in total
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