Winnti Group used a rootkit to modify typical server functionality.5
group
Winnti Group G0044
- Created
- 31 May 2017
- Last modified
- 31 July 2026
- Aliases
- Winnti Group · Blackfly
Winnti Group is a threat group with Chinese origins that has been active since at least 2010. The group has heavily targeted the gaming industry, but it has also expanded the scope of its targeting.[1][2][3] Some reporting suggests a number of other groups, including Axiom, APT17, and Ke3chang, are closely linked to Winnti Group.[4]
6
TechniquesBottom 20%
5
Tactics26th pct
3
Tools & malware47th pct
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference G0044
Winnti Group looked for a specific process running on infected servers.6
Winnti Group has used a program named ff.exe to search for specific documents on compromised hosts.7
Winnti Group has downloaded an auxiliary program named ff.exe to infected machines.8
Winnti Group used stolen certificates to sign its malware.9
Winnti Group has registered domains for C2 that mimicked sites of their intended targets.10
Standing G0044
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.
Tactics526th pct
26th percentile · 74% of 176 ATT&CK groups have more tactics spanned.
Tools & malware347th pct
47th percentile · 53% 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 / technique8medBottom 18%
18th percentile · 82% of 176 ATT&CK groups have more detection rules per technique.
Tests / technique6.5med
Detection coverage G0044
173 distinct rules cover the 6 techniques recorded for this group. The 175 technique-to-rule mappings resolve to 173 distinct rules, because one rule can cover several techniques. 121 Sigma · 52 Splunk.
5 covered by at least one rule1 with no coverage173 distinct rules in total
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