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

Static analysis result for SHA-256 1ffdb2bb93c0449b…

MALICIOUS

Office (OLE) / .XLS

104.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-22
MD5: aebfef156850e4bd49a830fce964aea8 SHA-1: 459035a220ed18a0c4d2166e4c3bee8fd650c3b7 SHA-256: 1ffdb2bb93c0449bfdb29d98b509dbdb2fb99f753ccc426ccb1719b3814ac1f2
70 Risk Score

Malware Insights

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

The critical heuristic firing for CVE_2017_0199 indicates the sample is designed to exploit this vulnerability. The embedded URL, http://OASOSIDFOSWEROEROOWRWERWEREWWW0W83W338W83WOWRWWRWRWRW9W9R9W9R9WR9W9RW9R9W9R9W9R0WR7RR7W7RW7RRW7R66WSD6DSD6S6D6DSD66D6S@172.245.123.113/17.....................17.............doc, strongly suggests a remote code execution attempt. Although no VBA code was found to be executable, the presence of the CVE exploit and the URL points to a downloader or initial access mechanism.

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.
  • 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://OASOSIDFOSWEROEROOWRWERWEREWWW0W83W338W83WOWRWWRWRWRW9W9R9W9R9WR9W9RW9R9W9R9W9R0WR7RR7W7RW7RRW7R66WSD6DSD6S6D6DSD66D6S@172.245.123.113/17.....................17.............doc

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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