tool

Chrommme S0667

Type: malware
Platform: Windows
Created: 1 December 2021
Last modified: 11 April 2024

Chrommme is a backdoor tool written using the Microsoft Foundation Class (MFC) framework that was first reported in June 2021; security researchers noted infrastructure overlaps with Gelsemium malware.[1]

Techniques61st pct

Tactics53rd pct

Threat groupsNone recorded

CampaignsNone recorded

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

MITRE reference S0667

Data from Local System T1005↗

Chrommme can collect data from a local system.2

Collection22 detection rules

System Network Configuration Discovery T1016↗

Chrommme can enumerate the IP address of a compromised host.3

Discovery25 detection rules

Encrypted/Encoded File T1027.013↗

Chrommme can encrypt sections of its code to evade detection.4

Stealth1 detection rules

Scheduled Transfer T1029↗

Chrommme can set itself to sleep before requesting a new command from C2.5

Exfiltrationno detection rules

System Owner/User Discovery T1033↗

Chrommme can retrieve the username from a targeted system.6

Discovery47 detection rules

Exfiltration Over C2 Channel T1041↗

Chrommme can exfiltrate collected data via C2.7

Exfiltration16 detection rules

Standing S0667

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

Techniques1461st pct

61st percentile · 61% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.

Tactics653rd pct

53rd percentile · 53% 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 / technique15.5med35th pct

35th percentile · 65% of 825 ATT&CK software entries have more detection rules per technique.

Tests / technique4med

Detection coverage S0667

340 distinct rules cover the 14 techniques recorded for this tool. The 355 technique-to-rule mappings resolve to 340 distinct rules, because one rule can cover several techniques. 232 Sigma · 108 Splunk.

12 covered by at least one rule2 with no coverage340 distinct rules in total

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MITRE reference S0667

Reach

Coverage

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