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

Static analysis result for SHA-256 b0cd17647fc69ec2…

MALICIOUS

Office (OLE) / .XLSX

645.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: a9a9c2318ac29160ece850c60e6b7aa6 SHA-1: 67701eb4f6813927c5262edf55d9943146f521a2 SHA-256: b0cd17647fc69ec21565ca141e88795eaf36084fb4d179198e988ab449d46483
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 embedded URL, https://gacorbos.me/2cou6N?&disease=equable&raccoon=huge&chronometer=giddy&opossum=fat&shrimp=fierce&secretary=magenta&porthole=fast&osmosis, is highly suspicious and likely serves as a loader for a second-stage payload. Although the VBA project itself contains no executable statements, the OLE object's vulnerability is the primary attack vector.

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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