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

Static analysis result for SHA-256 504eb5b56f45a2ae…

MALICIOUS

Office (OLE) / .XLS

99.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-27
MD5: c81a0ca221d403ef573c70776ab89afe SHA-1: 4612884836cb9e0ce43e4d36ef95f03553707ced SHA-256: 504eb5b56f45a2ae56fe242b656682da9ef5e300218e53c249bbe7deedb70c54
70 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 attempts to download a remote payload from the provided URL. The embedded URL is reconstructed as http://kkkkkkkkkkkkk34kkkkkkkkkkkkkk34kkkkkkkkkkkkkk34kkkkkkkkkkkkkk34kkkkkkkkkkkk34kkkkkkkkkkkkkk34ksdfhdskfhsdkfh33hkh34h3k@3.239.182.162/99.................99.....................doc. The VBA macros, while not containing executable statements themselves, are part of the exploit chain. The overall attack pattern is a remote code execution vulnerability leading to a payload download.

Heuristics 3

  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://kkkkkkkkkkkkk34kkkkkkkkkkkkkk34kkkkkkkkkkkkkk34kkkkkkkkkkkkkk34kkkkkkkkkkkk34kkkkkkkkkkkkkk34ksdfhdskfhsdkfh33hkh34h3k@3.239.182.162/99.................99.....................doc

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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