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

Static analysis result for SHA-256 fcfabaaf9a5b2287…

MALICIOUS

Office (OLE) / .XLS

1.10 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 114f2dfd11f6d21eddaf6162cb818ac2 SHA-1: 48d1cd6e1945d794b8eea48094de07f3d77c169a SHA-256: fcfabaaf9a5b228727840c434c7192369cd82f115fbe29dade21dc6c722eddd0
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 attempts to load a remote resource from the URL http://tny.wtf/dGa. Although the VBA project contains no executable statements, the presence of the OLE2Link object and the associated URL strongly suggest a malicious intent to download and execute a second-stage payload. The file is an Excel spreadsheet, and the exploit targets a vulnerability in how Office applications handle OLE objects.

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

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