Paladion discovers new variants of WannaCry
The ransomware attacked infected telcos, utilities, universities, ministries, rail companies, local government and private companies
It has been a week since WannaCry ransom worm surfaced and now cyber defence company Paladion has announced it has discovered new variants.
However these variants have no connection to the previous Kill switch discovered in the original ransomware.
Amit Roy, executive vice president and regional head for EMEA at Paladion, said: "The first large wave of WannaCry may have died down because a domain the ransomware was calling was registered by a security researcher, thus revealing a kill switch. However, the fact remains that if affected devices are not patched immediately and mitigation steps are not taken, there is still a high possibility of re-infection."
"Since Sunday, we have discovered WannaCry Ransomworm versions without a connection to the previous Kill Switch. Of the variants that surfaced on 14th May 2017, two have an updated domain name or kill switch and one does not have a kill switch. However, the variant with no kill switch has bugs that are preventing it from encrypting user data. But then, the propagation part via ETERNALBLUE and DOUBLEPULSAR works without a hitch," explained Roy.
In order to contain the spread of the cyber-attack and to mitigate, Paladion advices that MS17-010 and related patches for CVE-2017-0143 to CVE-2017-0148 should be patched immediately.
Also important is the Shadow Brokers leak of exploit tools that became public in April 2017. The dump includes several other CVEs, and these patches should be prioritized to stay protected from imminent threats.
The WannaCry ransomware meant that before every infection it would try to call the domain iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com. If there wasn't a response, it would lock the victim's machines. However, if the domain was up and running, the malware would stop in its tracks - slowing down the spread.