Create RANSOM_BadRabbit.yar

malware/RANSOM_BadRabbit.yar

+import "pe"
+ 
+rule sig_8ebc97e05c8e1073bda2efb6f4d00ad7e789260afa2c276f0c72740b838a0a93 {
+   meta:
+      description = "Bad Rabbit Ransomware"
+      author = "Christiaan Beek"
+      reference = "BadRabbit"
+      date = "2017-10-24"
+      hash1 = "8ebc97e05c8e1073bda2efb6f4d00ad7e789260afa2c276f0c72740b838a0a93"
+      source = "https://pastebin.com/Y7pJv3tK"
+   strings:
+      $x1 = "schtasks /Create /SC ONCE /TN viserion_%u /RU SYSTEM /TR \"%ws\" /ST %02d:%02d:00" fullword wide
+      $x2 = "need to do is submit the payment and get the decryption password." fullword ascii
+      $s3 = "If you have already got the password, please enter it below." fullword ascii
+      $s4 = "dispci.exe" fullword wide
+      $s5 = "\\\\.\\GLOBALROOT\\ArcName\\multi(0)disk(0)rdisk(0)partition(1)" fullword wide
+      $s6 = "Run DECRYPT app at your desktop after system boot" fullword ascii
+      $s7 = "Enter password#1: " fullword wide
+      $s8 = "Enter password#2: " fullword wide
+      $s9 = "C:\\Windows\\cscc.dat" fullword wide
+      $s10 = "schtasks /Delete /F /TN %ws" fullword wide
+      $s11 = "Password#1: " fullword ascii
+      $s12 = "\\AppData" fullword wide
+      $s13 = "Readme.txt" fullword wide
+      $s14 = "Disk decryption completed" fullword wide
+      $s15 = "Files decryption completed" fullword wide
+      $s16 = "http://diskcryptor.net/" fullword wide
+      $s17 = "Your personal installation key#1:" fullword ascii
+      $s18 = ".3ds.7z.accdb.ai.asm.asp.aspx.avhd.back.bak.bmp.brw.c.cab.cc.cer.cfg.conf.cpp.crt.cs.ctl.cxx.dbf.der.dib.disk.djvu.doc.docx.dwg." wide
+      $s19 = "Disable your anti-virus and anti-malware programs" fullword wide
+      $s20 = "bootable partition not mounted" fullword ascii
+   condition:
+      ( uint16(0) == 0x5a4d and
+        filesize < 400KB and
+        pe.imphash() == "94f57453c539227031b918edd52fc7f1" and
+        ( 1 of ($x*) or 4 of them )
+      ) or ( all of them )
+}