Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 64025178d67fe7f4…

MALICIOUS

Office (OLE) / .XLS

378.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 27f9968a69662b25ac670e921446dd60 SHA-1: 300f87c4a591a0452e2c027eafdbae70f35cbf0a SHA-256: 64025178d67fe7f49c10af7a51f6e950eb2f97280344d3c01a521a9b725d16fe
100 Risk Score

Malware Insights

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

The sample is an Excel 4.0 spreadsheet containing an Auto_Open macro, which is a known technique for executing malicious code upon opening. The macro is designed to display a lure to the user, prompting them to enable macros. Once enabled, it attempts to download a payload from the URL htp://rmdwk19obfzrq03ohby.xyz/apple.gif.

Heuristics 3

  • 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.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
855e443b676f37217d33677a9c6a10a49b0648d00e8aa00f6d93fbdd2229abce		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 4016 bytes

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