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

Static analysis result for SHA-256 df5d83f80c41170d…

MALICIOUS

Office (OOXML) / .XLSX

636.1 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2022-07-11
MD5: e3b879b75ad43b81396283b96453822b SHA-1: 7d2350e1ce2ad60a30ed9a00d6fac5c5a69d5ff0 SHA-256: df5d83f80c41170d4a2cd879f6a1ec2ad56813beaa02ec29eb3409a14aa2abaa
100 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking T1204.002 Malicious File

The file is an Excel document containing an embedded OLE object, specifically identified as a vulnerable Equation Editor object. This object carries a payload within its Ole10Native stream, indicated by an anomalous header and size discrepancy. The document body presents a fake purchase order, likely intended to trick the user into interacting with the malicious content.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/vI3d1.Si7LYdy contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • Equation Editor object carries payload-like Ole10Native stream high OLE_EQUATION_OLE10NATIVE_PAYLOAD_ANOMALY
    Embedded OLE object declares the Equation Editor CLSID but stores a large high-entropy Ole10Native stream with malformed package sizing. This is an exploit-shaped Equation/OLE payload container seen in malicious OOXML samples. It is not assigned to a specific CVE unless the MTEF/Equation Native primitive also matches.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
a433eda256565b1441915f0ee6ac0f3e3dcbc884605e0c927fc88914ac8ad32c		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/vI3d1.Si7LYdy 914432 bytes
ooxml_oleobject_00_ole10native_00.bin
49aab7d6691f2435ea3c828a5c359f590dae1ed23c0ee010842dda61b9d1a783		 ole-package OOXML xl/embeddings/vI3d1.Si7LYdy Ole10Native stream: OLe10nATiVe 904938 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.