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

Static analysis result for SHA-256 a47993ba7a7a6bfb…

MALICIOUS

Office (OLE) / .XLS

1.14 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 3487bc1f2726e5b860f5651555defb85 SHA-1: c4d3a5dfafac6e4d95f26085785a8716c660bc27 SHA-256: a47993ba7a7a6bfb7482e2c70ded36b2bc9c7348311ca6e1310cef3a043337ca
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 PowerShell

The sample exploits CVE-2017-0199, a critical vulnerability in Microsoft Office that allows for remote code execution via URL Monikers. The heuristic explicitly points to a remote loader and provides the URL 'https://woki.me/CTndA' from which the payload is likely downloaded. No VBA macros were found to be executable, but the core vulnerability is sufficient for exploitation.

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