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

Static analysis result for SHA-256 84d470aae25c02fc…

MALICIOUS

Office (OLE) / .XLS

318.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: bb6790a0de184db404dd11059b85e1c8 SHA-1: aaf50757827622a772c0986ab940e3591c256512 SHA-256: 84d470aae25c02fc2e066b4b730009e9eae4600e10fe9c6689a71ae8a214f360
60 Risk Score

Malware Insights

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

The file is an Excel 4.0 (XLM) macro-enabled spreadsheet. The presence of Auto_Open with dangerous functions like RUN indicates it attempts to execute code. The document body and embedded URL suggest a lure to download and execute a file from the provided URL, likely a second-stage payload. The XLM macro sheet is the primary mechanism for this execution.

Heuristics 3

  • XLM Auto_Open with dangerous formula APIs high 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://v5zkjbrz97g9v3yw.xyz/index.php�
    • https://v5zkjbrz97g9v3yw.xyz/index.php

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
df3b8b616d476e9629214a7bac7b9b98ca7d08bf5f43e0f45dab974d49023d38		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3403 bytes

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