Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 63ad8e3bae0e92d9…

MALICIOUS

Office (OOXML)

578.9 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2020-06-01
MD5: 9cc037492d253da83ba330b38c434587 SHA-1: 60a5edff90744026b7a48668206fd17a85b47f57 SHA-256: 63ad8e3bae0e92d95299949c3772e4aeef10a1b6b5d1cb053400db2157f1717f
62 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an OOXML file containing an embedded OLE object identified as an Equation Editor object. This is a common technique used to exploit vulnerabilities, such as CVE-2017-11882, to achieve arbitrary code execution on the victim's machine. No scripts or document body text were extracted, limiting further analysis of the specific payload.

Heuristics 3

  • 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
  • Suspicious extracted artifact info 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 189952 bytes
SHA-256: 7ce9fe91704231e5d60021f007c77e337b976c7176e6422e0dc08374ab0b92e4
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
ooxml_oleobject_01.bin ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject2.bin 1587712 bytes
SHA-256: db7c78570726575809181462014bff6006a0a7e7065a691f04525c4c35bbaf5a
ooxml_oleobject_01_ole10native_00.bin ole-package OOXML xl/embeddings/oleObject2.bin Ole10Native stream: Ole10Native 1572612 bytes
SHA-256: d85009cb0f9a593892012a4df8d74182d2ae8fe27d01b2e6029a2b2c0c8b8d19
emf_00.emf ooxml-emf OOXML EMF part: xl/media/image2.emf 3145608 bytes
SHA-256: 78c2466c6539c3c9aecc57dd4b2ea6303724eeaef9925fc568c6da8fc6efde19

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