MegaCortex loads injecthelper.dll into a newly created rundll32.exe process.4
tool
MegaCortex S0576
- Type
- malware
- Platform
- Windows
- Created
- 17 February 2021
- Last modified
- 10 March 2025
MegaCortex is ransomware that first appeared in May 2019. [1] MegaCortex has mainly targeted industrial organizations. [2][3]
16
Techniques70th pct
8
TacticsTop 20%
0
Threat groupsNone recorded
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0576
MegaCortex has used .cmd scripts on the victim's system.5
MegaCortex can parse the available drives and directories to determine which files to encrypt.6
After escalating privileges, MegaCortex calls TerminateProcess(), CreateRemoteThread, and other Win32 APIs.7
MegaCortex has added entries to the Registry for ransom contact information.8
MegaCortex can enable SeDebugPrivilege and adjust token privileges.9
Standing S0576
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
Techniques1670th pct
70th percentile · 70% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics8Top 20%
80th percentile · 80% of 825 ATT&CK software entries have this many tactics spanned or fewer.
Threat groups061% 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 / technique23.5med56th pct
56th percentile · 56% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique8med
Detection coverage S0576
766 distinct rules cover the 16 techniques recorded for this tool. The 797 technique-to-rule mappings resolve to 766 distinct rules, because one rule can cover several techniques. 475 Sigma · 291 Splunk.
15 covered by at least one rule1 with no coverage766 distinct rules in total
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