Type
File Name
Location
Killer Skull was first discovered in November 2024 in enterprise cloud environments.
Name
Killer Skull
First Seen
November 2024
Killer Skull is known to target specific file types. Below are all known file types that Killer Skull is known to infect.
In some cases, ransomware will update the modified date, when it encrypts files. Killer Skull 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 Killer Skull ransomware is known to change.
Suffixes
/.[0-9a-z]{4}$/
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 Killer Skull.
Type File Name Location file payment_information.txt EveryFolder screenshot Desktop
These are the names of the executables that contain the undetonated ransomware payload for Killer Skull.
Executables
killerskull.exe, runtimebroker.exe
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 Killer Skull.
External Pages
