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

Static analysis result for SHA-256 55178b4c5caa2903…

MALICIOUS

Office (OLE) / .XLS

1.15 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: cb3192ed7cce14bbaf38106e473524e5 SHA-1: af0470db50269f1e28da4b5a43f75bb9e0c2304f SHA-256: 55178b4c5caa2903c7f09382479660dc7fcc77ff918b8ffb42a3048d322e1bcd
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 Service Execution: Visual Basic

The critical heuristic firing indicates the exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to download and execute a remote payload from the provided URL. The VBA project, while not containing executable statements directly, is part of the exploit mechanism. The sample's primary function is to act as a downloader for further malicious activity.

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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