Office (OLE) / .XLSX malware analysis — malicious · 8646dbe5e97c1e1e

MALICIOUS

Office (OLE) / .XLSX

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

MD5: b6b86337d6e1d9cb108c5280b625c268 SHA-1: 667f73369e3101f8dbb94a32c4cd5c4af41098e6 SHA-256: 8646dbe5e97c1e1e11d497a899423d8615c3af59e950423e64c56491effb9cb9

80 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File

The sample contains Excel 4.0 (XLM) macros, including an Auto_Open function that calls dangerous APIs like RUN. It also includes a lure to enable macros, a common technique for malware droppers. The embedded URL is likely used to download a second-stage payload.

Heuristics 4

XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN

Excel 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.
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.
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
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://45.11.183.181/22.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `0b5b119eb061b1b93590cf2630c71be563ede46fc4362728188f73409889e0bf`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	2597 bytes

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