Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7912f54112126a1c…

MALICIOUS

Office (OLE)

38.5 KB Created: 2008-01-04 11:03:45 Authoring application: WPS Office First seen: 2014-06-27
MD5: 3ea4c27f746ba1c7ab6be306539664af SHA-1: 5dba752202ce028fe740ab570ca163244f70d70c SHA-256: 7912f54112126a1cb73484f6c67ec9fbd209f49f3a2a9ce714f3de1fd559bf50
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is an Excel 4.0 macro sheet, identified by critical heuristics indicating a legacy Excel formula macro virus. The embedded text explicitly mentions 'Excel Formula Macro Virus (XF.Classic)' and 'The Narkotic Network 1998', suggesting a malicious intent to execute code. The macro likely attempts to infect other workbooks or execute a payload, as indicated by the 'Simple Payload' and 'Infect Workbook' sections.

Heuristics 2

  • Legacy Excel formula macro virus marker critical OLE_XLS_FORMULA_MACRO_VIRUS
    Workbook stream contains self-identifying legacy Excel formula macro virus markers. This indicates the document carries formula macro virus content even when no VBA project or modern XLM macro-sheet structure is present.
  • 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.

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