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

Static analysis result for SHA-256 834784c990ae97e8…

MALICIOUS

Office (OLE) / .XLS

56.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 5c802db20a91c33e3953ee18449c8269 SHA-1: 484c8780ee2c95cc01f3e3309e916a7b362af6b1 SHA-256: 834784c990ae97e823e158f2334317644b01f6397cba0978ff69acca5fc8ef5e
160 Risk Score

Malware Insights

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

The file contains Excel 4.0 macros, including an Auto_Open function, which is a critical finding. The macros are designed to execute dangerous formula APIs, specifically the RUN function, to download a second-stage payload from the URL 'designergon.com/adam/eveliasm.php'. The document also contains a lure to enable macros, indicating a user interaction-based attack. The presence of the Auto_Open macro and the download URL strongly suggests a malicious downloader.

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
7cfd43e0ec96d055c13380d83d02fda9b8d165845e8b927f869ac6eb14841094
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 4630 bytes