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

Static analysis result for SHA-256 544fd96fa98b5920…

MALICIOUS

Office (OLE) / .XLS

250.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: a3cf9e49b576180f453b4195a4fda171 SHA-1: 172a2b533ed72156c4408af1494e0c0cc1972fba SHA-256: 544fd96fa98b592051e4d150804bd7fd3562cc6b7ca4dd8d8c6f30c106350c62
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 exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to download and execute a remote loader from the provided URL. Although the VBA project contains no executable statements, the OLE vulnerability is sufficient to initiate the malicious chain. The extracted URL is the primary indicator of compromise.

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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