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

Static analysis result for SHA-256 8665f5fd5f4dd057…

MALICIOUS

Office (OLE) / .XLS

1.20 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 97274c5ce0a5f9fa80e43549e7cd9564 SHA-1: d9459c2a8e1f10b32d3723062769b703c4c2465f SHA-256: 8665f5fd5f4dd05793ffbdb16fb892d6393e65ea7f79c6d9716c79817c93845a
68 Risk Score

Malware Insights

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

The sample is an OLE2Link file that exploits CVE-2017-0199, a known vulnerability for remote code execution. The heuristic explicitly identifies the exploit and the URL used to download the secondary payload. The VBA project is present but contains no executable statements, indicating the exploit is likely triggered by the OLE structure itself rather than macro execution.

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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