Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 ac882e401e4e0152…

MALICIOUS

Office (OOXML)

9.7 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2019-09-30
MD5: 022536f59083f21940686e1574f86b27 SHA-1: bbcb1e8d3f1e518d0cce45f4f7b1aacd7504dac8 SHA-256: ac882e401e4e0152c8e0aa17d6124cda63462e390e2f1dfc14e3db523a4f1c73
240 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

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

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.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4608 bytes
SHA-256: 177a3e711cfdf2206dc4025d6aa353b860c4437eadf1edd78ecfb865d5a5ea7a
Detection
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0
Obfuscation or payload: unlikely

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