Office (OOXML) malware analysis — malicious · 5d1ba5998fd0d915

MALICIOUS

Office (OOXML)

17.4 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2019-08-04

MD5: 9e3bb22c7758b6dc7ce105e3f2ca6290 SHA-1: 8072e46b6bf6d6ebb106f2b4656a2a7a0025d2b6 SHA-256: 5d1ba5998fd0d915218d90a729755fe21a5aff1c0ddd807653c8fc50c01be0cd

140 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is an Office document containing an embedded OLE object, specifically an Equation Editor object, which is flagged as anomalous and indicative of CVE-2018-0798. The document body contains a lure to 'ENABLE EDITING ABOVE' to encourage users to bypass security measures and enable macro execution. The embedded OLE object is likely a payload designed to exploit this vulnerability for client execution.

Heuristics 5

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
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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: `464bd3ae03607cd2cc2041fb5a0485959de55f066339db293b7601b8ec04b492`
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	2043 bytes
SHA-256: `c9e0031a297758db52a2c20568dbe62b5ac2a7af5e8698ca7637fe67659b5f5b`
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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