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

Static analysis result for SHA-256 cfeece5a6b332b64…

MALICIOUS

Office (OLE) / .XLS

373.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 926d8bc6b3800fd518d6376a645bdc49 SHA-1: 3b1be79fe8be0826749ce2d59ce4ae8c7ac188bd SHA-256: cfeece5a6b332b647107b959388e467c9e17eb0841171e1af02d08f8e7f416ca
100 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

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 document is opened. The SE_ENABLE_LURE heuristic confirms that the document prompts the user to enable macros. The extracted URL http://dfyf19fytrc03magy.xyz/apple.gif is highly suspicious and likely serves as the download location for a secondary payload. The macro's intent is to download and execute a payload from this URL, disguised as a document signing service.

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
2ac443b2f7a7c7dacab58d688f79b899d711838fbcffc1be18f4e47ef994457a
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 4016 bytes