Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 45396624a6baf645…

MALICIOUS

Office (OOXML) / .XLSX

33.1 KB Created: 2015-04-23 11:00:07 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2022-05-25
MD5: 2527c4ecebec1e9981c5d75bf22f4487 SHA-1: c55f95ecde5643f2969f709912896ee813f4d0f5 SHA-256: 45396624a6baf645800513cdbc6111703399e137c63c4498c0e9cfbc99b141f9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

This XLSX file contains an embedded OLE object, specifically an Equation Editor object, which is known to be vulnerable to CVE-2018-0798. The document body contains a fake vendor registration form, suggesting a lure for financial fraud or credential harvesting. The embedded OLE object is likely used to exploit the Equation Editor vulnerability to download and execute a secondary payload. An external hyperlink to 'http://www.entrecanalesdomecq.com/' was also detected.

Heuristics 6

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/oleObject1.bin contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • CVE-2018-0798 — anomalous Equation Editor native stream high CVE likely CVE_2018_0798_EQUATION_NATIVE_ANOMALY
    Embedded Equation Editor OLE data contains anomalous native stream bytes consistent with a CVE-2018-0798-style Equation Editor exploit. This is treated as likely CVE evidence because the Equation object is malformed and payload-like, but it does not match the exact public matrix-overflow byte signature.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • External hyperlinks (1) low OOXML_EXTERNAL_HYPERLINKS
    Document contains 1 external hyperlink — clickable URLs are stored as external relationships. First target: http://www.entrecanalesdomecq.com/
  • 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://www.entrecanalesdomecq.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
7cbb484682d114f17989b741c108432ecf9bb17089fb03428f952bc8e95fcd5e		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
ooxml_oleobject_00_ole10native_00.bin
f686532c37855dfb33d7baadebfcf1557e44e2de8b34164692b758e5220a47cf		 ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: OLe10naTIve 1693 bytes

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