Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 54ac8db19ef3f0c9…

MALICIOUS

Office (OOXML)

17.3 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2019-06-27
MD5: 038748beb3334d270ea86636519c398e SHA-1: 6f1663a45399bedd09e597b0909352a8f5be2392 SHA-256: 54ac8db19ef3f0c9924bcd780345bbe5b7bcdfe8f5bb90255d370fc9d300d306
260 Risk Score

Malware Insights

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

The sample is an OOXML document containing an embedded OLE object, specifically identified as an Equation Editor exploit targeting CVE-2017-11882. The document body contains a lure to 'ENABLE EDITING' to view the content, indicating a malicious intent to trick the user into enabling macro execution. The ClamAV detection further confirms the presence of this known exploit.

Heuristics 5

  • 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
  • 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

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: fbd1c2cce0f76ad404b8fee889d97aa0a18d4c0f9e39933a55f384cd79669b3e
Detection
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0
Obfuscation or payload: unlikely

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