Office (OOXML) malware analysis — malicious · 97b5c0670c7738b1

MALICIOUS

Office (OOXML)

9.4 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2019-09-30

MD5: 6a84f3e188d983b39efc64766bcdaac2 SHA-1: 3502581f246925bdea3e7f53f9cb64cef1ff1b4b SHA-256: 97b5c0670c7738b1624f71fd0213d373d35a17506e7aaf5e3087a0b33e6dc3bf

240 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristics indicate the presence of the CVE-2017-11882 vulnerability within an embedded Equation Editor OLE object. This exploit is known to allow for arbitrary code execution. The file is classified as malicious due to this critical vulnerability.

Heuristics 4

CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882

Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
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.
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
Embedded OLE object medium OOXML_OLE_OBJECT

Document contains an embedded OLE object

Extracted artifacts 1

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	3584 bytes
SHA-256: `de866c3281f1beb981e28298d2839c13e404d3e802993253ce454baa566dcd86`
Detection ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 Obfuscation or payload: unlikely

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