MALICIOUS
182
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The sample is an Excel 4.0 macro-enabled document that uses an Auto_Open macro. The document body contains obfuscated text that appears to be an attempt to construct a URL. Heuristics indicate the presence of dangerous formula APIs and a lure to enable macros, common for malware delivery. The impersonation of a document signing service further supports a phishing or social engineering attack vector.
Heuristics 6
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Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAMEoletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
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XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FNExcel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
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Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPENWorkbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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Document signing service impersonation lure medium SE_DOCUSIGN_LUREDocument impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
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Embedded URL info EMBEDDED_URLOne 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://www.w3.org/1999/02/22-rdf-syntax-ns# In document text (OLE body)
- http://ns.adobe.com/xap/1.0/mm/In document text (OLE body)
- http://ns.adobe.com/xap/1.0/sType/ResourceRef#In document text (OLE body)
- http://ns.adobe.com/xap/1.0/In document text (OLE body)
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txt |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 73352 bytes |
SHA-256: 4816f074acbc78439ec0879113c438dbdb4ae26aba507197504be5b2bb8f6383 |
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Preview scriptFirst 1,000 lines of the extracted script
' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, very hidden - Sheet ' 0085 10 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - C ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 26 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - bpzViVIjGEgOfRVvV ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet3 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet3 ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible - Sheet ' 0018 19 LABEL : Cell Value, String Constant - aloE len=0 ' 0018 27 LABEL : Cell Value, String Constant - ardhHvsmFCZu len=0 ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!HO45181 ' 0018 25 LABEL : Cell Value, String Constant - BdLcOSrSdX len=0 ' 0018 61 LABEL : Cell Value, String Constant - BEvUxcaIwRIxMWFFrsTcoRkPnGSGDwPMjTdjfrIJegpNuY len=0 ' 0018 61 LABEL : Cell Value, String Constant - bpziiVVwFStNsRiuigaspMvHNJUlmIJTqXBQwEWeUzuvty len=0 ' 0018 39 LABEL : Cell Value, String Constant - BrGQyylYyViwevhlLzwqJGcy len=0 ' 0018 27 LABEL : Cell Value, String Constant - BsdLNhKPcZIV len=0 ' 0018 47 LABEL : Cell Value, String Constant - buDrXTTSXIBImNyPSVNlPtdZOiYPdnWW len=0 ' 0018 57 LABEL : Cell Value, String Constant - CDMkRuKqwQYOtopnsdWeIjUkoqiIkPzvjFulzKssfS len=0 ' 0018 48 LABEL : Cell Value, String Constant - CfhOhnvkQZaYdBHPsGFVZbTsIzkSUpRWk len=0 ' 0018 37 LABEL : Cell Value, String Constant - cMuwRtyMWrFseGcbDkCnrS len=0 ' 0018 23 LABEL : Cell Value, String Constant - crYexGvb len=0 ' 0018 26 LABEL : Cell Value, String Constant - CSVYQoSwgcR ... (truncated) |
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