Office (OOXML) / .XLSX malware analysis — malicious · fa8008a2015d2d78

MALICIOUS

Office (OOXML) / .XLSX

633.5 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2022-10-05

MD5: 0a8225ab2d253b0bca7a2d361f4e31c4 SHA-1: c74f78b80a6bb857a58fc4d9cf4b0c1fd3425595 SHA-256: fa8008a2015d2d78b610f11d188c2bf2a1809ff447ec611a8d409319a2523544

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The file is an OOXML document containing a high-risk OLE object, specifically an Equation Editor object. This object has an anomalous Ole10Native stream, indicating it likely carries a payload. The document body presents a purchase order, a common lure for social engineering attacks. The presence of the embedded OLE object strongly suggests an attempt to exploit vulnerabilities or deliver malware when opened.

Heuristics 3

Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Embedded OLE object xl/embeddings/hE4Vmsiy.sa 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.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin` `c3720767162a54f76c65d4c312fcdca94f9fc5520a16466fd306a2dcc695fe12`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/hE4Vmsiy.sa	926720 bytes
`ooxml_oleobject_00_ole10native_00.bin` `b27346508d28356521b783bcc385e13a86a69e3d7e238043f17c2a470ad5e3d5`	ole-package	OOXML xl/embeddings/hE4Vmsiy.sa Ole10Native stream: ole10NATIve	916790 bytes

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