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

Static analysis result for SHA-256 72dcaba0e3d74e56…

MALICIOUS

Office (OLE) / .XLS

367.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 2078ad5a3de0ba9b1bfb73efb295de59 SHA-1: 3d4410c0fa2bf10c721b4123254ae49861adee98 SHA-256: 72dcaba0e3d74e5692453223b5026b2c4cea5bef3c7936c1f08ecdfa3322faf3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1105 Ingress Tool Transfer

The file is an Excel spreadsheet containing Excel 4.0 macros, specifically an Auto_Open macro, which is a strong indicator of malicious intent. The document body contains text that appears to be part of a macro command sequence, including URLs that are likely used to download a second-stage payload. The presence of an 'enable lure' heuristic further supports that the document is designed to trick users into enabling macros.

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://mayread.com/aXfFF8qdsV/th.html
    • https://tpcsv.neosj.why3s.tw/XjHoDakG/th.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
7758cbebef832a37ce0a327fd7d893202195f03ba9b854edef74b19dbb11678f
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 8349 bytes