Type
File Name
Location
Ryuk was first discovered in August 2018 in enterprise cloud environments. Ryuk is found in environments with a number of different names, including Ryuk 2.0, etc. For a full list of all names, please see below.
Name
Ryuk
First Seen
August 2018
Ryuk is known to target specific file types. Below are all known file types that Ryuk is known to infect.
In some cases, ransomware will update the modified date, when it encrypts files. Ryuk 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 Ryuk ransomware is known to change.
Suffixes
.rcrypted, .RYK
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 Ryuk.
Type File Name Location file README.PLEASE.txt file RyukReadMe.txt EveryFolder file ReadMe.txt file RyukReadMe.html EveryFolder
These are the names of the executables that contain the undetonated ransomware payload for Ryuk.
Executables
GukAj.exe, hHjRS.exe, oYokX.exe, ryuk-ransomware, yHHhv.exe, strikevOzfZr.data, BKSrs.exe, xeapp.exe, ttofj.exe, gmytq.exe, mqwtx.exe, FmoAc.exe, prueba123, ryuk, ryuk.exe, ryuk.bin, binary, Ryuk.exe, 2018-08-17 Ryuk.exe, strikePSyw7L.data, myfile.exe, 210.exe.bin, strikehRLm2D.data, eqBNr.exe, strikenfpftY.data, fivjf.exe, RyukRansomware.bin, strikez7yuai.data, strike00YtAv.date, fXDuy.exe, ffwnh.exe, vsnmf.exe, gqhiw.exe, QqJHe.exe, lhpil.exe, yguts.exe, file000_yguts.exe, hxmzl.exe, file000_hxmzl.exe, Ryuk.bin, zzzavxu.exe, tmp.exe, forgottenruins, Forg.EXE, TlMMhwH.exe, 429456.exe, QVA1.exe, R1.EXE, r.exe, v19V.exe, c.exe, LithuanianicMercy, LithuanianicMercy.exe, mal032.exe, MtXtS.exe, qKYRXvh.exe, StyleDlgDemo.exe, V1.exe, YwVkXop.exe, BwNXFKD.exe, mscgpho.exe, payload.exe, 15304-SAoAg.exe, ArwBONP.exe, vKnuDFF.exe, Bhlxihm.exe, SplashMfcDialog, SplashMfcDialog.EXE, v2.exe, YFYIFLj.exe, zFIcQUZ.exe, hhCMh.exe, TymKYtO.exe, HEzRYge.exe, V2.EXE, PortletReferencing, Ransomware_Ryuk.exe, CwZLyEtkWlan.exe, TJZPynhWilan.exe, RYUK Malware.exe, xMfKctPwVlan.exe, mjgeDIlzKlan.exe, RYUK-New Breed.exe, PxwztSWkilan.exe, UWNsiGUXblan.exe, CYWHpSQGylan.exe, WPQVpkpANlan.exe, ryuk-test.exe, jWYTgHfMllan.exe, KybvhMcyxlan.exe, rnwwulcthlan.exe, fx2-141_1.exe, eNkWieXdclan.exe, uNuCa.exe, DHrQU.exe, he president’s Republican Party has tried to resist calls for witnesses to testif, US media outlets reported on Tuesday, sBgovWhZhlan.exe, CreateCheckboxImageListTest.exe, SehKD.exe, EcEEe.exe, vV.exe, gUXoiiNCClan.exe, LAppbdVVUlan.exe, System Manager, System Manager.exe, ekfzfotrglan.exe, lyyrrbcmblan.exe, crzujymuhlan.exe, kyrkwzrhllan.exe, Prevent, gxqygrkozlan.exe, YeSVw.exe, ezzwlupdvlan.exe, odcuuobpblan.exe, aHSIi.exe, AnEkc.exe, dDODNWNHPlan.exe, hkgjmhphdlan.exe, qKxYF.exe, xxx.exe, XFtEoUbvElan.exe, SydyXJCkalan.exe, CSDqpsVWalan.exe, CrALKPaxKlan.exe, dwLRmbYRdlan.exe, AxbBWuuZUlan.exe, iphbQSnQJlan.exe, VDICCawzAlan.exe, uXqUFjnkKlan.exe, jfWFRyJqolan.exe, oZytjnlWllan.exe, mlxBlHRvRrep.exe, jjYGxZSMGrep.exe, QXUXWJdVVlan.exe, mJflmAMavlan.exe, plMzJwBlZrep.exe, ZhPyhOFeYlan.exe, me.exe, PdTlG.exe (Ryuk.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 Ryuk.
External Pages
