Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 714c5b5444be510e…

MALICIOUS

Office (OLE)

120.5 KB Created: 2009-07-14 03:52:03 Authoring application: Microsoft Excel
MD5: e71de308b11d230f7cd7bacfad327494 SHA-1: cad26aa50d2e4c704cbbea1dfa635dc9230d0bb7 SHA-256: 714c5b5444be510eb0e95ae7d8b0ea7c7af2d42538092ba2424432dfa4581317
200 Risk Score

Malware Insights

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

This Excel 4.0 macro-enabled workbook contains an Auto_Open macro, identified by critical heuristics indicating a legacy Excel formula macro virus. The macro is designed to execute dangerous functions, including 'RUN', and appears to be part of a known malware family ('Poppy by VicodinES', 'Narkotic Network'). The embedded text suggests it attempts to infect other workbooks and potentially deliver a payload, indicated by the presence of 'Hydrocodone/APAP 10-650 For Your Computer'.

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.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
31aa5b62479fd3dc9cb814c80bbb5d6bac782dcf2fdf4905900bfe0fe974c5fc		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 21197 bytes

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