Test subject – Xiaoba ransomware
Xiaoba has evolved from a simple ransomware to a file destroying coinminer. This is mainly due to some bugs in the code, but now is back with yet another version, which only encrypts files and demands a ransom to get them back, as any other ransomware does.
Discovered in October last year, we currently know of 4 versions, which primarily target Chinese speakers, but there is also an English version available. The previous variant was so buggy, that even though it did not encrypt files, it still destroyed most executables, because of their poor injection techniques. The scope of this variant was to make sure that whatever is launched, the coinminer is also executed.
Xiaoba ransomware test facts
The new version behaves like a classic ransomware, gathering user data, encrypting user files and demanding ransom. It appends .[BaYuCheng@yeah.net].china to the encrypted files. We have never seen a ransomware appending a country name to the attacked files. It is also very fast, encrypting many files in a very short time. Interestingly enough, the originally executed malware will duplicate itself, automatically launch the new copy and encrypt the original. We think the latest action is also a result of sloppy coding.
We currently do not know of any tools that will successfully decrypt the files without paying the ransom, which we will never recommend.
Xiaoba ransomware test results
TEMASOFT Ranstop detects Xiaoba ransomware easily once it starts processing files. Upon detection, the user is alerted, and the ransomware process is stopped and quarantined. The affected files are automatically recovered so that the user doesn’t lose her documents.
About TEMASOFT Ranstop
TEMASOFT Ranstop is an anti-ransomware software that detects present and future ransomware, based on file access pattern analysis with a high degree of accuracy. At the same time, it protects user files so that they can be restored in case of malware attacks or accidental loss.
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