Daily Summary
Sample volume remains stable with 23 new Agent Tesla samples identified, closely aligning with the 7-day average of 21. No significant surge or decline in activity is indicated by today’s figures.
New Samples Detected
JavaScript (.js) files constitute nearly half of today’s new samples (10), with executable files (.exe) being the second most common (6). The presence of a .uu file and a .hta file indicates ongoing experimentation with less common archive and script formats to potentially bypass simple filters.
Distribution Methods
The prevalence of .js and .hta files points to continued reliance on script-based delivery, often via phishing emails with malicious attachments. The single .zip archive and .tar files suggest payloads are being bundled with decoy documents or tools to increase the likelihood of user execution.
Detection Rate
Current Agent Tesla variants are generally well-detected by major AV engines due to the malware’s long-established signature. However, the consistent volume of new samples indicates automated obfuscation and repacking are effective enough to ensure a portion of deliveries succeed before detection signatures are broadly updated.
C2 Infrastructure
No new command-and-control servers were identified today. This suggests actors are likely consolidating operations on existing, resilient infrastructure or utilizing compromised websites for staging, avoiding the operational overhead of establishing new domains.
7-Day Trend
Activity over the past week has shown minor fluctuations but has remained consistently within a narrow band, indicating a steady, automated propagation campaign without major new offensives or disruptions.
Security Analysis
The ongoing use of .js and .hta files, coupled with archive formats, underscores a persistent focus on social engineering as the primary infection vector. A notable, non-obvious shift is the minor but consistent appearance of Unix-based archive formats like .tar, which may indicate testing for cross-platform compatibility or targeting specific enterprise environments. Defensive priority should be placed on hardening email gateways to block executable and script attachments outright, and implementing application allow-listing to prevent unauthorized script hosts like wscript.exe from executing payloads downloaded by users.