- Windows Defender on W10 has quite a few bugs
- Katana does use signatures, although it uses a cloud lookup instead of local signatures (see below from Dr Web website)
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Lightning-like — analyses the behaviour of each threat in real time and immediately neutralises harmful scripts and processes that your anti-virus didn’t manage to recognise.
Dr.Web KATANA’s protection is based on non-signature-based search methods, the neutralization of malware, and cloud protection technologies. The product analyses and monitors all system processes and blocks those that exhibit malicious behavior.
To detect malicious actions, Dr.Web KATANA uses information stored by the anti-virus locally (they're talking about algorithms and libraries here, and not signatures) as well as Dr.Web Cloud reputation data which includes:
- Information about the routines used by programs having malicious intentions;
- Information about files that are 100% clean;
- Information about the compromised digital signatures of well-known software developers;
- Information about digital signatures used by adware and riskware;
- Protection routines used by specific applications.
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- Katana is not a complete anti-ransom solution; it is going to fail against a lot of ransomware
- Katana was released as version 1.0 and it remains at version 1.0; it hasn't been updated since its initial release
Submit bug reports... don't forget to send the samples...