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

Static analysis result for SHA-256 5bbc37ffe3d61033…

MALICIOUS

Office (OLE) / .XLS

281.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: dceda18926b25ae0f1abc5369aff1cd1 SHA-1: 28ccc153f5d3c35ad1ca7f158a5bfe37b000ff92 SHA-256: 5bbc37ffe3d61033704ab73ad96dd62b616a236f21821c616693c16353096bbf
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is used to download and execute a remote loader from the URL http://gf.to/qlxzSSkYu. Although VBA macros are present, they do not contain executable statements, suggesting the exploit relies on the OLE object rather than macro execution. The presence of the OLE2Link object and the embedded URL strongly suggest a remote code execution attempt.

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://gf.to/qlxzSSkYu

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