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

Static analysis result for SHA-256 3af6cc7f9b20d09d…

MALICIOUS

Office (OLE) / .XLS

111.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d4e285dc9e69f06c7d6db39105968774 SHA-1: e444d78b78e9785db00a5875eb6d34573fb82483 SHA-256: 3af6cc7f9b20d09d5924a6c4d869200f47897b4c01d595c484e1b4846d650919
140 Risk Score

Malware Insights

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

The file is an Excel spreadsheet containing embedded Excel 4.0 (XLM) macros, as indicated by the OLE_XLM_AUTOOPEN and OLE_XLM_DANGEROUS_FN heuristics. The presence of the XLM Auto_Open function with dangerous API calls suggests an attempt to execute malicious code upon opening. The CLAMAV_DETECTION heuristic further confirms its malicious nature, identifying it as a downloader. The embedded URL is likely used to fetch the secondary payload.

Heuristics 5

  • ClamAV: Doc.Downloader.Docusign0521-9864805-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Docusign0521-9864805-0
  • 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.
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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 http://shopee.gr/ds/021220&C51
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
d405099019968ed82600cdff3e36045d016a968559aab3c8ddcea953b85df4c9		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 1798 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).

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