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

Static analysis result for SHA-256 24f1f97facb9481d…

MALICIOUS

Office (OLE) / .XLSX

144.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 80dbd5572ab3ca4e9c2ab5adeb87fde6 SHA-1: 956fc802eb185de26ecdfe2bac9be59b5aeee7c2 SHA-256: 24f1f97facb9481d56f3bbbeb5488d9ccd82411ac88e2edf9c0a30879edabbdb
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.005 PowerShell

The sample contains Excel 4.0 macros with an Auto_Open entry, indicating it will execute automatically upon opening. It also employs a lure to trick the user into enabling macros by impersonating a DocuSign signing request. The presence of multiple suspicious URLs suggests a downloader or droppper functionality, likely to fetch and execute a second-stage 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
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
4fe8a5e8d044300f6cea871b68533e8e735bcb3995124abd360e573c5009f2ee		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 4464 bytes

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