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

Static analysis result for SHA-256 b7912ba2a657f7a3…

MALICIOUS

Office (OLE) / .XLS

1.37 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 238e3faf424c55a924c0e02b66df0f24 SHA-1: 7f9a451809c769f7e61f4ab1ec7fe72c81f0b759 SHA-256: b7912ba2a657f7a39a202c5ddc0803f3fc31224539a322a83135ec8274e23006
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 PowerShell T1059.001 PowerShell T1059.003 Windows Command Shell

The critical heuristic firing indicates the sample exploits CVE-2017-0199 via an OLE2Link object with a URL moniker. This technique is used to download and execute a remote payload from the specified URL. While VBA macros were present, they contained no executable statements, suggesting the primary malicious functionality is delivered via the OLE vulnerability.

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 http://gurl.pro/fycglx
  • 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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