defection.io

malware

Net Crawler S0056

Type: malware
Platform: Windows
Created: 31 May 2017
Last modified: 16 April 2025

Net Crawler is an intranet worm capable of extracting credentials using credential dumpers and spreading to systems on a network over SMB by brute forcing accounts with recovered passwords and using PsExec to execute a copy of Net Crawler. [1]

TechniquesBottom 17%

TacticsBottom 21%

Threat groupunranked

CampaignsNone recorded

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

defection.io

malware

Net Crawler S0056

Type: malware
Platform: Windows
Created: 31 May 2017
Last modified: 16 April 2025

TechniquesBottom 17%

TacticsBottom 21%

Threat groupunranked

CampaignsNone recorded

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

Net Crawler MITRE reference S0056

LSASS Memory T1003.001 ↗

Net Crawler uses credential dumpers such as Mimikatz and Windows Credential Editor to extract cached credentials from Windows systems.2

Credential Access90 detection rules

SMB/Windows Admin Shares T1021.002 ↗

Net Crawler uses Windows admin shares to establish authenticated sessions to remote systems over SMB as part of lateral movement.3

Lateral Movement54 detection rules

Password Cracking T1110.002 ↗

Net Crawler uses a list of known credentials gathered through credential dumping to guess passwords to accounts as it spreads throughout a network.4

Credential Access1 detection rules

Service Execution T1569.002 ↗

Net Crawler uses PsExec to perform remote service manipulation to execute a copy of itself as part of lateral movement.5

Execution55 detection rules

Standing S0056

Reach is how much of ATT&CK this malware 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

Techniques4Bottom 17%

17th percentile · 83% 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 / technique54.5medTop 5%

95th percentile · 95% of 825 ATT&CK software entries have this many detection rules per technique or fewer.

Tests / technique6med55th pct

55th percentile · 55% of 825 ATT&CK software entries have this many atomic tests per technique or fewer.

Data comps / technique4.5med54% tie · 11 values

54% of the population shares a single value across only 11 distinct values, so a percentile here would rank the tie, not the entity.

Mitigations / technique3.5medTop 3%

97th percentile · 97% of 825 ATT&CK software entries have this many mitigations per technique or fewer.

5 of 8 axes carry an honest rank on this page. Coverage medians are taken across this malware’s 4 Enterprise techniques.

Range

Technique Campaign use over its cumulative rule count.

Campaigns · 0Sigma rules (cumulative) · 155Splunk ESCU (cumulative) · 34