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

Static analysis result for SHA-256 516ec6c7328406f8…

MALICIOUS

Office (OLE) / .XLS

97.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-23
MD5: 1464e8aa43f839eab50f955165453903 SHA-1: d831cdab2fb7b504bed3785014e30728b1084387 SHA-256: 516ec6c7328406f87710736d3ea1cb22cf5024924727bb3486e347e66a46ed5d
70 Risk Score

Malware Insights

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

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which attempts to load a remote resource. The embedded URL, http://OASOSIDFOSWEROEROOWRWERWEREWWW0W83W338W83WOWRWWRWRWRW9W9R9W9R9WR9W9RW9R9W9R9W9R0WR7RR7W7RW7RRW7R66WSD6DSD6S6D6DSD66D6S@172.245.123.109/84..................................84.................doc, is likely the source of the secondary payload. Although no VBA code was found to be executable, the presence of the OLE vulnerability and the embedded URL strongly suggest a downloader or remote code execution attack.

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@172.245.123.109/84..................................84.................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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