A new family ransomware, which ESET detected as CryCryptor, was targeting Android users in Canada under the guise of an official COVID-19 contact tracing app. ESET prevented the attack.
ESET researchers spotted a tweet announcing the discovery of a new Android banking malware as initially thought, and further investigating the issue identified a malicious ransomware company targeting Android users in Canada.
Using two websites about COVID-19, the cyber crooks behind the malicious enterprise convinced users to download an app that appeared to be the official COVID-19 contact tracing app when it was actually ransomware malware.
Both websites are currently down operation. ESET researchers created one tool αποκρυπτογράφησης (decryptor) για τα θύματα του CryCryptor, το οποίο βασίζεται σε σφάλμα (bug) της κακόβουλης εφαρμογής.
"The CryCryptor malware contains a bug in its code that allows any application installed on the 'infected' device to enable any service provided by the application containing the bug. So we created an application that activates CryCryptor's decryption process,” explained Lukáš Štefanko, who conducted the research.
Starting a business ransomware coincided with the announcement by the Government of Canada to support the development of a national, voluntary coronavirus traceability application called COVID Alert.
"It is clear that the company that uses CryCryptor was designed to take advantage of the official COVID-19 detection application," comments Štefanko.
After the websites are shut down, security solution providers are notified and made available free decryptor, this app is no longer a threat. However, this only applies to a specific version of the CryCryptor family of ransomware.
The CryCryptor family is based on open source. "We have notified GitHub, which hosts the code, but they do not have a strong history of dealing with malicious projects," comments Štefanko.
ESET products offer protection against ransomware in the CryCryptor family, detected as Android / CryCryptor.A.
“In addition to using a quality mobile security solution, we advise Android users to install applications only from trusted sources such as the official store Google Play store, ”Concludes the ESET researcher.
For more information, read the related blog "New ransomware uses COVID-19 tracing guise to target Canada? ESET offers decryptor”At WeLiveSecurity.