Flaws exposed by the WannaCry ransomware

Written on 19 May 2017, 11:37am

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1. Using old OS (in some cases, pirated, so impossible to upgrade)
2. Not updating their OS (sometimes, manually disabling the Windows update)
3. Not using a proper anti virus / anti malware solution
4. Not taking regular backups


1. Not minimising the attack surface area (keeping the SMB service enabled even if it’s not used)
2. Not taking regular backups
3. Lack of a proper IT Security strategy, including guidelines on how to respond to security incidents


1. Not disclosing the vulnerability until their exploit was stolen


1. Not having a seamless Windows update process (mixing critical security updates with minor ones, forced restarts, etc)

Some links:

But in the end, things might work out just fine 🙂

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