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

Static analysis result for SHA-256 30a973e75f85a9ee…

MALICIOUS

Office (OLE) / .XLS

444.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2024-06-11
MD5: 5ebb34059d8db5ce7d343e997b2ce827 SHA-1: ad87ea5eca71c29e3a18d3f72e84d87fda7a0ea8 SHA-256: 30a973e75f85a9ee9063fc4b17e5c6704f2e58ebfef7abe3e1d55c16f51b2e89
130 Risk Score

Malware Insights

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

The sample is an Excel file that exploits CVE-2017-0199 via a URL moniker to download and execute a remote payload from http://gf.to/ykMHAHBmk. The presence of VBA macros, though not containing executable statements directly, is typical for this type of exploit. The ClamAV detection further confirms its malicious nature as a downloader.

Heuristics 4

  • 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
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • 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://gf.to/ykMHAHBmk

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes

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