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

Static analysis result for SHA-256 f81dfa43a6339dac…

MALICIOUS

Office (OLE) / .XLS

848.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 649db9baffd7ad853ab0cf1bac32cecc SHA-1: b2c3819609fadf1dcbd5644811ae86942f55d819 SHA-256: f81dfa43a6339dac6b1e3d1ef18ce64bec526761284e7c97c705ecca4a219ea7
70 Risk Score

Malware Insights

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

The sample is an OLE2Link file that exploits CVE-2017-0199, a known vulnerability for remote code execution. The heuristic explicitly points to a URL moniker that is used to download a remote loader. The embedded URL https://masuk.to/SDrWV8 is highly suspicious and likely serves as the initial download location for the secondary payload. No VBA macros were found to be executable, but the core vulnerability lies in the OLE object itself.

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 https://�������������������������������������������������������������������������������������������������������������������������������

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