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

Static analysis result for SHA-256 057fc3038f986eba…

MALICIOUS

Office (OLE) / .XLS

693.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-25
MD5: 4d88d8bab90627f965f64b4606110aa1 SHA-1: aba2fa3704f577fe618b03f4100995520888f22b SHA-256: 057fc3038f986ebafce53cdac1b82e82b3633cfd4ac45212e86c74d7b25408d3
70 Risk Score

Malware Insights

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

The sample is an Excel file that exploits CVE-2017-0199 via an OLE2Link object. This vulnerability allows it to load a remote document from the URL http://104.223.76.152/business/document25.doc. Although the VBA macros themselves contain no executable statements, the critical heuristic firing indicates the exploit mechanism is present and active. The primary goal is to download and execute a secondary payload.

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://104.223.76.152/business/document25.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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