tool
NOKKI S0353
- Type
- malware
- Platform
- Windows
- Created
- 30 January 2019
- Last modified
- 22 October 2025
NOKKI is a modular remote access tool. The earliest observed attack using NOKKI was in January 2018. NOKKI has significant code overlap with the KONNI malware family. There is some evidence potentially linking NOKKI to APT37.[1][2]
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0353
NOKKI is written to %LOCALAPPDATA%\MicroSoft Updatea\svServiceUpdate.exe prior being executed in a new process in an apparent attempt to masquerade as a legitimate folder and file.6
NOKKI uses the Windows call SetWindowsHookEx and begins injecting it into every GUI process running on the victim's machine.7
Standing S0353
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
70th percentile · 70% 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
72nd percentile · 72% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Detection coverage S0353
594 distinct rules cover the 16 techniques recorded for this tool. The 622 technique-to-rule mappings resolve to 594 distinct rules, because one rule can cover several techniques. 444 Sigma · 150 Splunk.
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