Xls.Downloader.Agent08210-9888570-0 — Office (OOXML) malware analysis

Static analysis result for SHA-256 3c83add1428a7c20…

MALICIOUS

Office (OOXML)

247.4 KB Created: 2020-12-08 15:40:16 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-07-07
MD5: 91a4a7e7a129614412ec0f93137ce766 SHA-1: 2d26515c0040c761415575bc166d62ad408c8f77 SHA-256: 3c83add1428a7c200d9eb62643eed0c587c6184054c275ebbba4df384dd93cfb
90 Risk Score

Malware Insights

Xls.Downloader.Agent08210-9888570-0 · confidence 95%

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The critical ClamAV heuristic identifies the file as 'Xls.Downloader.Agent08210-9888570-0', indicating a downloader. The OOXML_CLICKABLE_IMAGE_FORM_LURE heuristic confirms the presence of a deceptive image designed to prompt user interaction with an external URL. This URL, 'https://microsoftwebsecure.mfs.gg/Z7DqjaN', is likely used to deliver a secondary payload or conduct phishing.

Heuristics 4

  • ClamAV: Xls.Downloader.Agent08210-9888570-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Agent08210-9888570-0
  • OOXML clickable image phishing/form lure medium OOXML_CLICKABLE_IMAGE_FORM_LURE
    Workbook uses a large embedded image as the visible document body and attaches a click-through external hyperlink to that image. The target is a form/collection service or the drawing contains download/view lure text, which is a common credential or document-phishing pattern rather than benign workbook data.
  • External hyperlinks (1) low OOXML_EXTERNAL_HYPERLINKS
    Document contains 1 external hyperlink — clickable URLs are stored as external relationships. First target: https://microsoftwebsecure.mfs.gg/Z7DqjaN
  • 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://microsoftwebsecure.mfs.gg/Z7DqjaN Document hyperlink

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