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

Static analysis result for SHA-256 d6ba8947a94f5e83…

MALICIOUS

Office (OLE) / .XLS

848.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 477a65eebac6498e30c1897c52fe07de SHA-1: f706f65cfd40d74f8c41f57c1f17365432078d2c SHA-256: d6ba8947a94f5e830264a54ab3d321d50e7b1fe8b719bc160a4fedad45b05535
68 Risk Score

Malware Insights

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

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to load remote content. The extracted URL, https://keraskale.me/EfL5WV?&chairperson=fallacious&leotard=hot&kidneys=wry&expansionism=subdued&snob=rich&length=silly&gasoline=feigned&airline=gullible&twilight, is the likely source of the secondary payload. Although the VBA project contains no executable statements, the presence of the OLE vulnerability is sufficient to classify this as a malicious document.

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