Ferocious Kitten has used right-to-left override to reverse executables’ names to make them appear to have different file extensions, rather than their real ones.2
group
Ferocious Kitten G0137
- Created
- 28 September 2021
- Last modified
- 31 July 2026
- Alias
- Ferocious Kitten
Ferocious Kitten is a threat group that has primarily targeted Persian-speaking individuals in Iran since at least 2015.[1]
6
TechniquesBottom 20%
4
TacticsBottom 20%
2
Tools & malware39th pct
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference G0137
Ferocious Kitten has named malicious files update.exe and loaded them into the compromise host's “Public” folder.3
Ferocious Kitten has attempted to convince victims to enable malicious content within a spearphishing email by including an odd decoy message.4
Ferocious Kitten has conducted spearphishing campaigns containing malicious documents to lure victims to open the attachments.5
Ferocious Kitten has acquired domains imitating legitimate sites.6
Ferocious Kitten has obtained open source tools for its operations, including JsonCPP and Psiphon.7
Standing G0137
Reach is how much of ATT&CK this group 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 176 ATT&CK groups 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
Techniques6Bottom 20%
20th percentile · 80% of 176 ATT&CK groups have more Enterprise techniques.
Tactics4Bottom 20%
20th percentile · 80% of 176 ATT&CK groups have more tactics spanned.
Tools & malware239th pct
39th percentile · 61% of 176 ATT&CK groups have more tools and malware.
Campaigns089% tie · 4 values
89% of the population shares a single value across only 4 distinct values, so a percentile here would rank the tie, not the entity.
Coverage
Rules / technique20med52nd pct
52nd percentile · 52% of 176 ATT&CK groups have this many detection rules per technique or fewer.
Tests / technique2med
Detection coverage G0137
160 distinct rules cover the 6 techniques recorded for this group. The 167 technique-to-rule mappings resolve to 160 distinct rules, because one rule can cover several techniques. 91 Sigma · 69 Splunk.
5 covered by at least one rule1 with no coverage160 distinct rules in total
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