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

Static analysis result for SHA-256 5ffd39a8fd7521dd…

MALICIOUS

Office (OLE) / .XLS

367.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d93e49e5194d2a091d9ec816fb8e480d SHA-1: 69c12ed4364ea8dcd81f2d3e96ed330d851bd2c1 SHA-256: 5ffd39a8fd7521dd55b2c91f26b09e30f6276c3130fad41dad210f9bb35f6211
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

The sample is an Excel 4.0 spreadsheet containing an Auto_Open macro, which is a strong indicator of malicious intent. The document body contains text that appears to be a lure to enable macros, and the extracted URLs suggest a download and execution chain. The presence of an Auto_Open macro directly maps to the T1059.005 (Visual Basic) technique, and the lure to enable macros aligns with T1204.002 (Malicious File). The overall pattern suggests a spearphishing attachment (T1566.001) used to deliver a secondary payload.

Heuristics 4

  • 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
  • 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 https://signifysystem.com/ceg7AX7oN0o/ue.html
    • https://fcventasyservicios.cl/k60jvjcT/ue.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
c7d4d2bead8580d5104e88300cefa6eb3ebffd421d1191db8449676bfb792ff2		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 8209 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.