Office (OOXML) malware analysis — malicious · afd34afe1ce78c75

MALICIOUS

Office (OOXML)

12.2 KB Created: 2018-03-14 13:56:47 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2020-05-25

MD5: 5cb5d06275ded197c872a8e9ab2e99b2 SHA-1: 33cb48e3f2d1370fffc27b81d7cf8c2ea25f7b3e SHA-256: afd34afe1ce78c75fa1f1b1ff9d88ebb7404969f46eed21285db6351eed8d83c

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is an Office document containing an embedded OLE object, specifically identified as an Equation Editor object. High-severity heuristics indicate a vulnerability (CVE-2018-0798) related to the Equation Editor's native stream, which is a known vector for arbitrary code execution. The embedded object likely contains shellcode designed to exploit this vulnerability.

Heuristics 4

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
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/oleObject1.bin	4096 bytes
SHA-256: `5316163e5635a79c36bab3935e2e4e2413e7eab1aad998b660a43f9757da9121`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL
`ooxml_oleobject_00_ole10native_00.bin`	ole-package	OOXML xl/embeddings/oleObject1.bin Ole10Native stream: ole10NAtIvE	1581 bytes
SHA-256: `19368034d3f038debff52b976046884fbf954ec0d26588851663f311999527cf`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL

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