UPPERCUT can upload files to the C2 from infected machines.34
tool
UPPERCUT S0275
- Type
- malware
- Platform
- Windows
- Created
- 17 October 2018
- Last modified
- 12 May 2026
UPPERCUT is a 32-bit HTTP-based backdoor that has been used by menuPass since at least 2017.[1] Once thought to be exclusive to menuPass, UPPERCUT was also observed being used by menuPass-associated MirrorFace during Operation AkaiRyū.[2]
15
Techniques66th pct
6
Tactics53rd pct
2
Threat groupsunranked
1
Campaignunranked
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0275
UPPERCUT has the capability to gather the victim's proxy information.5
UPPERCUT has the capability to collect the current logged on user’s username from a machine.6
UPPERCUT uses cmd.exe to execute commands on the victim’s machine.7
UPPERCUT has used HTTP for C2, including sending error codes in cookie headers.8910
UPPERCUT has the capability to gather the system’s hostname and OS version.1112
Standing S0275
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
Techniques1566th pct
66th percentile · 66% 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 groups261% 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.
Campaign185% 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 / technique29medTop 25%
75th percentile · 75% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique7med
Detection coverage S0275
611 distinct rules cover the 15 techniques recorded for this tool. The 633 technique-to-rule mappings resolve to 611 distinct rules, because one rule can cover several techniques. 451 Sigma · 160 Splunk.
13 covered by at least one rule2 with no coverage611 distinct rules in total
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