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

Static analysis result for SHA-256 aec15f4809d89972…

MALICIOUS

Office (OLE) / .XLS

1.14 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 7da99c33c60fc51b1e0b5ba386964d37 SHA-1: 14257d9f7f31db48275d39c18c8366ee8b9bf9dc SHA-256: aec15f4809d8997257964d5b2e78aa924c61f20d9b6c5378bc0bd97a02362a66
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 download a remote payload. The embedded URL 'https://mycon.link/C1CzbG?&software=black&champion=gleaming&statistician=jealous&boar' is highly suspicious and likely serves as the initial download source for a second-stage payload. Although the VBA project contains no executable statements, the critical heuristic firing for CVE-2017-0199 indicates a remote code execution vulnerability.

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://www.iec.ch

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