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

Static analysis result for SHA-256 57cb0f32f2d7636e…

MALICIOUS

Office (OLE) / .XLS

124.5 KB Created: 1996-12-17 01:32:42 Authoring application: Microsoft Excel
MD5: de6937c57aeaaca6eff12fd2b6228a5f SHA-1: 3e726d96404ba3683e72816a9838ebfb3b221665 SHA-256: 57cb0f32f2d7636eafdadac64a0fef5ff538658a269b3d548933e2ac90be34ea
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is an XLS document with a high-severity heuristic indicating the presence of VBA macros, specifically an Auto_Open macro. ClamAV detection confirms this as malware (Doc.Macro.Laroux-5893719-0). The document body appears to be a work report, likely a lure to disguise the malicious macro. The Auto_Open macro is designed to execute automatically upon opening the document, suggesting an intent to download and execute a second-stage payload.

Heuristics 3

  • ClamAV: Doc.Macro.Laroux-5893719-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.Laroux-5893719-0
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
e8e07c670c99758573c7311d9e003ff2e807ed9890a050c4c3d8472ff38387d3		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 5772 bytes

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