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

Static analysis result for SHA-256 158644533c0c9683…

MALICIOUS

Office (OLE) / .XLSX

430.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2024-07-07
MD5: 996967065e5478555d9c4bf0838f6fd0 SHA-1: 8c07156945c2c55d61df66ff9ee0f2d6c598a6a4 SHA-256: 158644533c0c9683e8c8da4cfafd48eb05164ae25bb0e5f433ed23aec8a7464e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 PowerShell T1204 User Execution

The file is identified as malicious by ClamAV and exhibits characteristics of a downloader. A critical heuristic firing indicates the exploitation of CVE-2017-0199, which is used to fetch a remote payload from the URL http://hop.fyi/5j0DN. This suggests the file's primary purpose is to act as an initial access vector for further malicious activity.

Heuristics 3

  • OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199
    Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
  • ClamAV: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0
  • 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://hop.fyi/5j0DN

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