Office (OLE) / .XLS malware analysis — malicious · a68783f39292f23e

MALICIOUS

Office (OLE) / .XLS

970.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: b9fb09b1f7881a716778305c8903ea28 SHA-1: 879969506e5b0e85505d8533e853171b11e1f529 SHA-256: a68783f39292f23e1dd58bd2581646d15472d2173156867cd06770d6c0afeecb

80 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious Link T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The critical heuristic OLE_XLM_AUTOOPEN_DEFINEDNAME indicates the presence of an Excel 4.0 Auto_Open macro, which is designed to execute automatically when the workbook is opened. The DOC BODY contains text that mimics a DocuSign notification, including a URL that appears to be a lure. The macro likely directs the user to this URL, which is a common phishing tactic.

Heuristics 2

Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME

oletools 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.
Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN

Workbook 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `7a4e71f3c35eb5ad8d8ed644d4980a335b4d641facc8695ce281666f33280fad`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	2012 bytes

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