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

Static analysis result for SHA-256 435bf6fa934925c6…

MALICIOUS

Office (OLE) / .XLS

847.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 8a0c0e891760b1f8d30987e48164d400 SHA-1: 6923d31b186b810feaecc442a939dbe1dd885ed7 SHA-256: 435bf6fa934925c64ce22f7bd35e590a3bcd2e94fe5fc0a533d8786a7bca8d86
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 PowerShell T1059.001 PowerShell T1059.003 Windows Command Shell T1059.004 Python

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to download and execute a remote payload from a specified URL. The extracted URL is the primary indicator of compromise. No VBA macros were found to contain executable statements, but the OLE structure itself is the vector for exploitation.

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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