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

Static analysis result for SHA-256 5bf939a5ebe50817…

MALICIOUS

Office (OLE) / .XLS

118.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: b363a9de28fa08d52fd1bcbe66b62177 SHA-1: 4d76d82d397c088d68038414bcc945c7e62fef9f SHA-256: 5bf939a5ebe508171529552a5d1495f495393ebb08eb87c08ac1f5fb9e0f941d
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an Excel spreadsheet that exploits CVE-2017-0199, a known vulnerability for remote code execution. The heuristic indicates it attempts to load a remote resource from the URL http://gurl.pro/bqrp4j. Although no VBA code was directly executable, the exploit itself is sufficient to download and execute a second-stage 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://gurl.pro/bqrp4j

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