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

Static analysis result for SHA-256 5a5bb4dfb3a5f83f…

MALICIOUS

Office (OLE) / .XLS

444.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-06-01
MD5: 9359cee09e158222901aa085bf9e8b63 SHA-1: 4022394c1ed8981c6750c5ad4a2233665402ec84 SHA-256: 5a5bb4dfb3a5f83fb612ed8ab70e072a8f841db7519112c9b402e4b9029a7220
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 document from the specified URL. Although the VBA project contains no executable statements, the presence of the OLE vulnerability and the embedded URL strongly suggests a downloader or remote code execution attack. The URL http://149.248.54.207/hi/hihihiihihiihihi%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23hihihihi.doc is the primary indicator of compromise.

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://149.248.54.207/hi/hihihiihihiihihi%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23hihihihi.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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