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

Static analysis result for SHA-256 82bbdf9fbfcbc0fa…

MALICIOUS

Office (OLE) / .XLS

481.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: db3726b1a82aa7dd94289b3dce29a291 SHA-1: f99e14530a63f659a12a2dab6ce742d03ee37717 SHA-256: 82bbdf9fbfcbc0fa58f6068ce4f81ffa26be9760521bda58fb2f66b3dd1bab3c
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.005 Visual Basic

The sample is an OLE2Link object that exploits CVE-2017-0199, a known vulnerability for remote code execution. The heuristic explicitly identifies the exploit and the URL from which the payload is downloaded. No VBA macros were found to be executable, but the exploit itself is sufficient to establish malicious intent. The attack pattern involves luring the user to open a malicious document that triggers the exploit.

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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