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

Static analysis result for SHA-256 6cfa50781e624efd…

MALICIOUS

Office (OLE) / .XLS

102.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-22
MD5: 7eeaf742f9695dc7ed3424c516f86244 SHA-1: 1f19342dd96e26d7acdb6e8ba555fffeb71e1212 SHA-256: 6cfa50781e624efd30bae6c1c9fabb2ba64c0ffbb7e3d94bcdbd51b831228cf7
70 Risk Score

Malware Insights

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

The sample is an Excel spreadsheet that exploits CVE-2017-0199 via an OLE2Link object to download a remote payload from the provided URL. Although no VBA code was directly executed, the presence of the OLE vulnerability and the embedded URL strongly indicate a malicious downloader. The URL itself appears to be a complex obfuscated string pointing to an IP address, likely serving the secondary stage.

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@192.3.176.131/24....................24................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