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

Static analysis result for SHA-256 f35c3de4c30d3e46…

MALICIOUS

Office (OLE) / .XLS

848.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: b2552051b21cacafc7c678c8e91295da SHA-1: 9c23eb0923724d0ca159bcc6ad4df7c8647505d2 SHA-256: f35c3de4c30d3e46f943bd577b55477f236cf26698fb148e2298a19fd8c98e77
68 Risk Score

Malware Insights

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

The sample is an OLE2Link file that exploits CVE-2017-0199. The heuristic indicates it attempts to load a remote URL, specifically 'https://snxpay.io/n9ZMNBx?&timeline=unaccountable&swell=chivalrous&file=thirsty&dictionary=brave&till=boring&miscarriage=typical&interpreter=stupid&kamikazehttps://snxpay.io/n9ZMNBx?&timeline=unaccountable&swell=chivalrous&file=thirsty&dictionary=brave&till=boring&mis...'. Although the VBA project contains no executable statements, the OLE structure itself is indicative of a malicious loader. The extracted URL is the primary indicator of compromise.

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