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

Static analysis result for SHA-256 c6d6bc5dba95780e…

MALICIOUS

Office (OLE) / .XLS

111.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 981123aa3298d39235dd9cac0ea1f79e SHA-1: 7ecc424a595eab8e5efefc54987e701f826501a4 SHA-256: c6d6bc5dba95780ed98a73ffcbea2df5c7e3b06f526b60874f23f73d66526529
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1105 Ingress Tool Transfer

The critical ClamAV heuristic and medium heuristics for XLM macros indicate malicious intent. The presence of an Auto_Open macro with dangerous functions suggests it's designed to execute automatically. The embedded URL and file path point to a downloader mechanism, likely intended to fetch and run a secondary payload, as suggested by the 'Doc.Downloader' ClamAV signature.

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://smartgal.us/ds/041220.gif�
    • 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
ca597e9bca3d8a4ee9cd5312c7effa3cf44e1390af76df3b9ea96d5e2c882e13		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 2082 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).

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