Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 e7c20a0df675fd42…

MALICIOUS

Office (OOXML)

441.1 KB Created: 2021-06-07 13:07:29 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-06-13
MD5: 9bd297346cdc090a55b3826e1a3d0b72 SHA-1: d11896f0467c6936fae661b31a82732132e93c42 SHA-256: e7c20a0df675fd42f6c3643f22ca56fe0f0ca988a2b9f4cd1056bd4ee2380060
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

The OOXML file contains VBA macros, indicated by the 'OOXML_VBA' heuristic. It also presents a lure to enable macros, a common technique for malware droppers. The external relationship points to a local file path, suggesting it might be part of a larger malicious package or a poorly configured dropper. The VBA code itself appears to be heavily obfuscated or truncated, making it difficult to determine its exact payload, but the presence of macros and the enable-lure strongly suggest malicious intent.

Heuristics 5

  • External relationship high OOXML_EXTERNAL_REL
    External target in xl/externalLinks/_rels/externalLink1.xml.rels: file:///C:\Users\pnicolas\Professional\Bascule V1 V2 - Kit de bascule\Kit GENERATION_ETIQ\GENERATION_ETIQ.xlsm
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://github.com/witwall/barcode-vba-macro-only/issues/1 OOXML external relationship
    • https://github.com/witwall/barcode-vba-macro-only/issues/4OOXML external relationship
    • http://strokescribe.com/en/ECI.htmlOOXML external relationship
    • http://I`Wck�brfOOXML external relationship
    • http://www.w3.org/2000/svgOOXML external relationship
    • http://www.w3.org/1999/xlinkOOXML external relationship
    • http://stackoverflow.com/questions/41404226/why-does-this-vba-generated-qr-code-stutter-barcode-vba-macro-onlyOOXML external relationship
    • http://stackoverflow.com/questions/16143331/generating-2d-pdf417-or-qr-barcodes-using-excel-vba/31663859#31663859OOXML external relationship
    • http://stackoverflow.com/questions/41404226/why-does-this-vba-generated-qr-code-stutter-barcode-vba-macro-only�OOXML external relationship

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) 148391 bytes
SHA-256: 526b7b5e5c30c43a717b82077ca823bf7fa18b852f7b1eb50f43ef1bb64e6984
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Feuil6"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Feuil11"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Feuil8"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Feuil1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Feuil15"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Feuil2"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Feuil4"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Feuil16"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Feuil5"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Feuil7"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Feuil12"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "ThisWorkbook"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Quantite_Modifiee_Macro"
Public Sub MODIFIER_QUANTITE()
    
    If selection.Rows.Count <> 1 Then
        MsgBox "Merci de ne sélectionner qu'une seule ligne", vbCritical, "Echec"
    Else
        If selection.Columns.Count < 18 Then
            MsgBox "Veuillez sélectionner la ligne entière.", vbCritical, "Echec"
        Else
            Quantite_Modifiee.Show
            
        End If
    End If
    
End Sub

Public Function get_quantite1()
... (truncated)
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 307200 bytes
SHA-256: ccdf26e35611eaa926724e46a9efaa0920db44da79081a98a4f118b9b1ffff11
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 7 long base64-like blob(s).

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