AgentTesla malware family

AgentTesla is a malware family tracked by MalwareAnalyzer by Cyble across 27 publicly analyzed samples. First seen 2026-07-29, most recently 2026-08-23. Observed ATT&CK techniques include T1059.001, T1112, T1543.003, T1518.001, T1547.001.

Corpus statistics

ATT&CK techniques used by AgentTesla

Extracted command-and-control infrastructure

Recent AgentTesla samples

Frequently asked about AgentTesla

What is AgentTesla?
AgentTesla is a malware family tracked by MalwareAnalyzer by Cyble across 27 publicly analyzed samples. First seen 2026-07-29, most recently 2026-08-23. Observed ATT&CK techniques include T1059.001, T1112, T1543.003, T1518.001, T1547.001.
How many AgentTesla samples have been analyzed?
MalwareAnalyzer by Cyble holds 27 publicly analyzed samples attributed to AgentTesla, first seen 2026-07-29 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 AgentTesla use?
Across our AgentTesla samples the most frequently observed techniques are T1059.001 (9), T1112 (9), T1543.003 (8), T1518.001 (5), T1547.001 (4), T1056.001 (3), T1562.004 (2), T1053.005 (1). Counts are the number of analyzed samples in which each technique was observed.
What file types does AgentTesla use?
AgentTesla samples in this corpus are distributed as pe (24), script (2), unknown (1).
Does AgentTesla use command-and-control infrastructure?
Yes. 6 distinct command-and-control indicators have been extracted from AgentTesla samples, either from static configuration or from traffic captured during sandbox detonation. The full list is published on the family page.
Is AgentTesla malicious?
27 of 27 analyzed AgentTesla 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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