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

Static analysis result for SHA-256 c58672786cc5ff1a…

MALICIOUS

Office (OLE) / .XLS

45.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: b4f063612cbe944f5f63e3e132793941 SHA-1: a406e09e9e71531b184d2acda1192d5de69c1eb4 SHA-256: c58672786cc5ff1aee1f2f582e209857a8fe055d5fefda026ff374cf7dab3968
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File

The file contains Excel 4.0 macros, including an Auto_Open function, which is a known technique for executing malicious code upon opening the document. The macro is configured to execute a dangerous function, likely to download a payload from the URL irenegladsteinmd.smartwebsitedesign.com/olamansrw/asesx.png. The 'SE_ENABLE_LURE' heuristic indicates the document likely contains instructions to enable macros, further supporting its malicious intent.

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.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
b2bdf5a083b77ed8a3a3dfc7e1f5c04a63968d29567a6c6c76b54ba9db0ac01e
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3244 bytes