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

Static analysis result for SHA-256 9b25f1b5b77466f9…

MALICIOUS

Office (OLE) / .XLS

1.04 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-10-06
MD5: db838e896fe65e782fde6004f549d93d SHA-1: 934e383c200be732053ff5eb47bbd815c3ca2576 SHA-256: 9b25f1b5b77466f9bd0e8b3f69cf5b5ec10dd5691a59767e5d8ae34f226a4a7f
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 download a remote document from the provided URL. Although no VBA code was found to be executable, the presence of the CVE exploit and the embedded URL strongly suggests a downloader or initial access mechanism. The URL itself is the primary IOC for this stage of the 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://103.182.16.23/250/3/ioi0OIOoi0IOIOIoi0OIOIioI0IOioi0000%23%23%23%23%23%23%23%23%23%23%23%23%23%2300ioi0ioiOI0oioiOIOI0ioIOIOI00%23%23%23%23%23%23%23%23%23%23%23%23%23%23000.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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