YARA Detection Rule: OilRig_Malware_Campaign_Gen1
Repository: Yara-Rules/rules
Detects: Detects malware from OilRig Campaign
Author: Florian Roth
Reference: https://goo.gl/QMRZ8K

Pattern signatures:
$x1 = "Get-Content $env:Public\\Libraries\\update.vbs) -replace" ascii
      $x2 = "wss.Run \"powershell.exe \" & Chr(34) & \"& {waitfor haha /T 2}\" & Chr(34), 0" fullword ascii
      $x3 = "Call Extract(UpdateVbs, wss.ExpandEnvironmentStrings(\"%PUBLIC%\") & \"\\Libraries\\update.vbs\")" fullword ascii
      $s4 = "CreateObject(\"WScript.Shell\").Run cmd, 0o" fullword ascii
      /* Base64 encode config */
      /* $global:myhost = */
      $b1 = "JGdsb2JhbDpteWhvc3QgP" ascii
      /* HOME="%public%\Libraries\" */
      $b2 = "SE9NRT0iJXB1YmxpYyVcTGlicmFyaWVzX" ascii
      /* Set wss = CreateObject("wScript.Shell") */
      $b3 = "U2V0IHdzcyA9IENyZWF0ZU9iamVjdCgid1NjcmlwdC5TaGV" ascii
      /* $scriptdir = Split-Path -Parent -Path $ */
      $b4 = "JHNjcmlwdGRpciA9IFNwbGl0LVBhdGggLVBhcmVudCAtUGF0aCA" ascii
      /* \x0aSet wss = CreateObject("wScript.Shell") */
      $b5 = "DQpTZXQgd3NzID0gQ3JlYXRlT2JqZWN" ascii
      /* whoami & hostname */
      $b6 = "d2hvYW1pICYgaG9zdG5hb" ascii

Detection condition:
( uint16(0) == 0xcfd0 and filesize < 700KB and 1 of them )

Full rule:
rule OilRig_Malware_Campaign_Gen1 
{

   meta:
      description = "Detects malware from OilRig Campaign"
      author = "Florian Roth"
      reference = "https://goo.gl/QMRZ8K"
      date = "2016-10-12"
      hash1 = "d808f3109822c185f1d8e1bf7ef7781c219dc56f[PII_REDACTED]748f0ace489d34"
      hash2 = "80161dad1603b9a7c4a92a07b5c8bce214cf7a3df897b561732f9df7920ecb3e"
      hash3 = "662c53e69b66d62a4822e666031fd441bbdfa741e20d4511c6741ec3cb02475f"
      hash4 = "903b6d948c16dc92b69fe1de76cf64ab[PII_REDACTED]bf47c29bf91f3fd987f996"
      hash5 = "c4fbc723981fc94884f0f493cb8711fdc9da698980081d9b7c139fcffbe723da"
      hash6 = "57efb7596e6d9fd019b4dc4587ba33a40ab0ca09e14281d85716a253c5612ef4"
      hash7 = "1b2fee00d[PII_REDACTED]8a63e669d2306c37ba0c417708d4dc1f751765c3f94e1"
      hash8 = "9f31a1908afb23a1029c079ee9ba8bdf0f4c815addbe8eac85b4163e02b5e777"
      hash9 = "0cd9857a3f626f8e0c07495a4799c59d502c4f3970642a76882e3ed68b790f8e"
      hash10 = "4b5112f0fb64825b879b01d686e8f4d43521252a3b4f4026c9d1d76d3f15b281"
      hash11 = "4e5b85ea68bf8f2306b6b931810ae38c8dff3679d78da1af2c91032c36380353"
      hash12 = "c3c17383f43184a29f49f166a92453a34be18e51935ddbf09576a60441440e51"
      hash13 = "f3856c7af3c9f84101f41a82e36fc81dfc18a8e9b424a3658b6ba7e3c99f54f2"
      hash14 = "0c64ab9b0c122b1903e8063e3c2c357cbbee99de07dc535e6c830a0472a71f39"
      hash15 = "d874f513a032ccb6a5e4f0cd55862b024ea0bee4de94ccf950b3dd894066065d"
      hash16 = "8ee628d46b8af20c4ba70a2fe8e2d4edca[PII_REDACTED]b71fe72455c6a52d15a9"
      hash17 = "55d0e12439b20dadb5868766a5200cbbe1a06053bf9e229cf6a852bfcf57d579"
      hash18 = "528d432952ef879496542bc62a5a4b6eee788f60f220426bd7f933fa2c58dc6b"
      hash19 = "93940b5e764f2f4a2d893bebef4bf1f7d63c4db856877020a5852a6647cb04a0"
      hash20 = "e2ec7fa60e654f5861e09bbe59d14d0973bd5727b83a2a03f1cecf1466dd87aa"
      hash21 = "9c0a33a5dc62933f17506f20e0258f877947bdcd15b091a597eac05d299b7471"
      hash22 = "a787c0e42608f9a69f718f6dca5556607be45ec77d17b07eb9ea1e0f7bb2e064"