tool

HARDRAIN S0246

Type: malware
Platform: Windows
Created: 17 October 2018
Last modified: 12 May 2026

HARDRAIN is a Trojan malware variant reportedly used by the North Korean government. [1]

TechniquesBottom 23%

TacticsBottom 21%

Threat groupunranked

CampaignsNone recorded

Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.

MITRE reference S0246

Protocol or Service Impersonation T1001.003↗

HARDRAIN uses FakeTLS to communicate with its C2 server.2

Command and Control3 detection rules

Windows Command Shell T1059.003↗

HARDRAIN uses cmd.exe to execute netshcommands.3

Execution61 detection rules

Proxy T1090↗

HARDRAIN uses the command cmd.exe /c netsh firewall add portopening TCP 443 "adp" and makes the victim machine function as a proxy server.4

Command and Control30 detection rules

Non-Standard Port T1571↗

HARDRAIN binds and listens on port 443 with a FakeTLS method.5

Command and Control10 detection rules

Windows Host Firewall T1686.003↗

HARDRAIN opens the Windows Firewall to modify incoming connections.6

Defense Impairment20 detection rules

Standing S0246

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

Techniques5Bottom 23%

23rd percentile · 77% of 825 ATT&CK software entries have more Enterprise techniques.

Tactics3Bottom 21%

21st percentile · 79% 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 / technique20med48th pct

48th percentile · 52% of 825 ATT&CK software entries have more detection rules per technique.

Tests / technique0med

Detection coverage S0246

124 distinct rules cover the 5 techniques recorded for this tool. 97 Sigma · 27 Splunk.

5 covered by at least one rule124 distinct rules in total

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MITRE reference S0246

Reach

Coverage

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