Malteiro has used scripts encoded in Base64 certificates to distribute malware to victims.2
group
Malteiro G1026
- Created
- 13 March 2024
- Last modified
- 31 July 2026
- Alias
- Malteiro
Malteiro is a financially motivated criminal group that is likely based in Brazil and has been active since at least November 2019. The group operates and distributes the Mispadu banking trojan via a Malware-as-a-Service (MaaS) business model. Malteiro mainly targets victims throughout Latin America (particularly Mexico) and Europe (particularly Spain and Portugal).[1]
12
Techniques39th pct
7
Tactics39th pct
1
Tool or malwareBottom 23%
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference G1026
Malteiro has utilized a dropper containing malicious VBS scripts.4
Malteiro collects the machine information, system architecture, the OS version, computer name, and Windows product name.5
Malteiro has the ability to deobfuscate downloaded files prior to execution.6
Malteiro has relied on users to execute .zip file attachments containing malicious URLs.7
Standing G1026
Reach is how much of ATT&CK this group 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 176 ATT&CK groups 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
Techniques1239th pct
39th percentile · 61% of 176 ATT&CK groups have more Enterprise techniques.
Tactics739th pct
39th percentile · 61% of 176 ATT&CK groups have more tactics spanned.
Tool or malware1Bottom 23%
23rd percentile · 77% of 176 ATT&CK groups have more tools and malware.
Campaigns089% tie · 4 values
89% of the population shares a single value across only 4 distinct values, so a percentile here would rank the tie, not the entity.
Coverage
Rules / technique13med38th pct
38th percentile · 62% of 176 ATT&CK groups have more detection rules per technique.
Tests / technique9med
Detection coverage G1026
268 distinct rules cover the 12 techniques recorded for this group. The 283 technique-to-rule mappings resolve to 268 distinct rules, because one rule can cover several techniques. 171 Sigma · 97 Splunk.
11 covered by at least one rule1 with no coverage268 distinct rules in total
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