Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 d6633e253163f3ed…

MALICIOUS

Office (OOXML)

84.2 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2019-01-12
MD5: 6242ae029790aa4ca3defc1361652bd7 SHA-1: 31e462225b031ff78703609e7b56b44b54a5ac92 SHA-256: d6633e253163f3ed4c083fc8a0c0864d0d7d35692828fa7c78659fefbc4a1c1c
120 Risk Score

Malware Insights

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

The critical heuristic firing for CVE-2017-11882 indicates that the embedded Equation Editor OLE object is vulnerable to exploitation. This vulnerability allows for arbitrary code execution, which is a common technique for delivering malicious payloads. The presence of an embedded OLE object further supports this attack vector.

Heuristics 3

  • 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.
  • 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 4096 bytes
SHA-256: 7913bd6359d74e5cf09217159f28caffa51946ed0533b3194095f2cbc52e9073

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