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

Static analysis result for SHA-256 950b0200a292ed9c…

MALICIOUS

Office (OLE) / .XLS

1.09 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 2712030166e0af1778646e821f8686be SHA-1: 451280f15a31d6f919e9ca16b1c88cd0a33c604a SHA-256: 950b0200a292ed9c0ad26c1d0fcc49af773742961730b2f80082b3aafb152915
68 Risk Score

Malware Insights

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

The file is an OLE2 document that exploits CVE-2017-0199 via a URL moniker to download and execute a remote payload from http://tny.wtf/vMCQY. Although the VBA project itself contains no executable statements, the exploit mechanism is clearly indicated by the heuristic firing. The document body is heavily corrupted and unreadable, but the exploit and URL are sufficient to determine the attack pattern.

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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