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

Static analysis result for SHA-256 a08024de84ffa279…

MALICIOUS

Office (OLE) / .XLS

1.24 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: e198b7900a7feb7b172eb2e7423dee74 SHA-1: 5662ab490a4a2f321e71438f99c17dbeca5e11ef SHA-256: a08024de84ffa279a60a3a56a85536d93bcb05898b8a954a5d8cada3721fe13c
68 Risk Score

Malware Insights

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

The sample is an OLE file that exploits CVE-2017-0199 via a URL Moniker to load a remote payload. The embedded URL, 'https://bestbackingbiscotneverneedtrailforgetbsestthignsforbetterwayintroducebestthigns.business@smol.re/Vq5ESg', is used to fetch and execute the secondary stage. Although VBA macros were extracted, they contained no executable statements, indicating the exploit is likely embedded within the OLE structure itself.

Heuristics 2

  • 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.

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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