tool
Neoichor S0691
- Type
- malware
- Platform
- Windows
- Created
- 22 March 2022
- Last modified
- 16 April 2025
Neoichor is C2 malware used by Ke3chang since at least 2019; similar malware families used by the group include Leeson and Numbldea.[1]
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0691
Neoichor can check for Internet connectivity by contacting bing[.]com with the request format bing[.]com?id=<GetTickCount>.4
Neoichor can collect the user name from a victim's machine.5
Neoichor can clear the browser history on a compromised host by changing the ClearBrowsingHistoryOnExit value to 1 in the HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Privacy Registry key.6
Standing S0691
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
51st percentile · 51% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
68th percentile · 68% of 825 ATT&CK software entries have this many tactics spanned or fewer.
61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.
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
71st percentile · 71% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Detection coverage S0691
531 distinct rules cover the 11 techniques recorded for this tool. The 545 technique-to-rule mappings resolve to 531 distinct rules, because one rule can cover several techniques. 342 Sigma · 189 Splunk.
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