Type
File Name
Location
CatB was first discovered in November 2022 in enterprise cloud environments. CatB is found in environments with a number of different names, including FishA, CatFish, FishCat, Fish-Cat, FishA-CatB, etc. For a full list of all names, please see below.
Name
CatB
First Seen
November 2022
CatB is known to target specific file types. Below are all known file types that CatB is known to infect.
In some cases, ransomware will update the modified date, when it encrypts files. CatB updates the last modified date of the file it targets.
Some ransomware will change or append a suffix to the end of the file after they are encrypted, including changing the extension of a file. Here are some of the possible suffixes that CatB ransomware is known to change.
Suffixes
Not all ransomware leaves a note. However, some ransomware leaves the infected party instructions on what the user should do to get rid of the ransomware, or satisfy the ransom. This often involves transferring money, often bitcoin or another cryptocurrency to a designated wallet.
Below are the type(s) of notes, content, and typical locations where Elastio has found ransom notes from CatB.
Type File Name Location
These are the names of the executables that contain the undetonated ransomware payload for CatB.
Executables
svchosts.exe, Catb-35a273df61f4506cdb286ecc40415efaa5797379b16d44c240e3ca44714f945b.dll, 1.dll, oci.dll, svchosts
Ransomware often links to external pages such as payment pages, telegram contacts, etc. Below are some of the URLs Elastio has found to be associated with CatB.
External Pages
