Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b050545a7ffcbbcf…

MALICIOUS

Office (OLE)

281.0 KB Created: 2019-01-08 06:11:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 28c0a2b0968996e6780f3095729ebe22 SHA-1: eadac5a834a62a432a10f45c47fba1a3cdec1e3d SHA-256: b050545a7ffcbbcf96dc79354a6988fcc2f55bc76b67b59eaab36e7d238a7f62
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The sample contains a VBA macro with an AutoOpen subroutine, a common technique for executing malicious code upon opening a document. The document body presents a job description lure to encourage user interaction. The AutoOpen macro manipulates document content and is likely intended to download and execute a second-stage payload, as indicated by the ClamAV detection signature 'Win.Malware.Agent-9662656-0'.

Heuristics 5

  • ClamAV: Win.Malware.Agent-9662656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Malware.Agent-9662656-0
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • 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.
  • 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 https://www.blockverify.com In document text (OLE body)
    • https://www.BlockVerify.comIn document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn 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) 799 bytes
SHA-256: fd2db3d9d7b9a2cff213da1964fcd8a9888304668f811f33e89fc96cc54aabee
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 = "NewMacros"
Sub AutoOpen()
    Dim oliPictuu As Shape
    
    For Each oliPictuu In ActiveDocument.Shapes
        If oliPictuu.AlternativeText = "GD" & "PR" Then
            oliPictuu.Left = 0
            oliPictuu.Top = 0
            oliPictuu.Width = 0
            oliPictuu.Height = 0
        End If
    Next oliPictuu
            
    ActiveDocument.Content.Font.Hidden = False
    ActiveDocument.Content.Font.Color = 0
    ActiveDocument.Content.Font.Size = 14
End Sub

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