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

Static analysis result for SHA-256 b4aab49d78d4cd4a…

MALICIOUS

Office (OLE) / .XLSX

1.48 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: ef178476d01f641b9d35854967e7cb1d SHA-1: 9648a49492001347227e2a0ce0fe4906649d7787 SHA-256: b4aab49d78d4cd4a75525ae6cd037366f881e88733051a494e778cff87fd496e
68 Risk Score

Malware Insights

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

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is a known vulnerability used to download and execute remote code. The associated URL, https://uvv.im/cAa79e, is highly suspicious and likely hosts the second-stage payload. No VBA macros were found to be executable, but the exploit itself is sufficient for initial 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.
    URL https://uvv.im/cAa79e
  • 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

Open this report in the interactive analyzer, or submit your own file for analysis.