Base64 malware family

Base64 is a malware family tracked by MalwareAnalyzer by Cyble across 18 publicly analyzed samples. First seen 2026-08-07, most recently 2026-08-23. Observed ATT&CK techniques include T1059.001.

Corpus statistics

ATT&CK techniques used by Base64

Recent Base64 samples

Frequently asked about Base64

What is Base64?
Base64 is a malware family tracked by MalwareAnalyzer by Cyble across 18 publicly analyzed samples. First seen 2026-08-07, most recently 2026-08-23. Observed ATT&CK techniques include T1059.001.
How many Base64 samples have been analyzed?
MalwareAnalyzer by Cyble holds 18 publicly analyzed samples attributed to Base64, first seen 2026-08-07 and most recently 2026-08-23. This counts public submissions to this platform only, so it is a measure of what we have seen rather than of the family's total prevalence.
What MITRE ATT&CK techniques does Base64 use?
Across our Base64 samples the most frequently observed techniques are T1059.001 (16). Counts are the number of analyzed samples in which each technique was observed.
What file types does Base64 use?
Base64 samples in this corpus are distributed as script (17), html (1).
Is Base64 malicious?
17 of 18 analyzed Base64 samples were scored malicious by the fused verdict, which combines multi-engine static scanning, YARA and hash reputation with behavior captured during real sandbox detonation. Each report lists every signal that contributed to its score.

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