FALLCHILL uses fake Transport Layer Security (TLS) to communicate with its C2 server.2
tool
FALLCHILL S0181
- Type
- malware
- Platform
- Windows
- Created
- 16 January 2018
- Last modified
- 22 October 2025
FALLCHILL is a RAT that has been used by Lazarus Group since at least 2016 to target the aerospace, telecommunications, and finance industries. It is usually dropped by other Lazarus Group malware or delivered when a victim unknowingly visits a compromised website. [1]
9
Techniques44th pct
5
Tactics41st 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 S0181
Standing S0181
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
Techniques944th pct
44th percentile · 56% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics541st pct
41st percentile · 59% of 825 ATT&CK software entries have more tactics spanned.
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 / technique25med60th pct
60th percentile · 60% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique9med
Detection coverage S0181
213 distinct rules cover the 9 techniques recorded for this tool. The 221 technique-to-rule mappings resolve to 213 distinct rules, because one rule can cover several techniques. 146 Sigma · 67 Splunk.
7 covered by at least one rule2 with no coverage213 distinct rules in total
tf
Loading...Drag headers to reorder | Drag edges to resize
tf
Loading detections...
| Select | Title | Description | Category | Status | Event | Product | MITRE ATT&CK | CVEs | Severity | Author | Created | Updated | ID | Refs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
© 2026 The MITRE Corporation. ATT&CK® and D3FEND™ data reproduced with permission. SigmaHQ detection rules licensed under DRL 1.1. attack.mitre.org · d3fend.mitre.org · CAR analytics licensed under Apache 2.0 · car.mitre.org