Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 57057a8600e963cc…

MALICIOUS

Office (OOXML)

72.4 KB Created: 2019-05-27 22:54:04 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2020-06-01
MD5: 5427ce8e77a1d3c80c4b9b62183c4b6f SHA-1: c6c8af4bde535c008867f542209c27704dc95bbf SHA-256: 57057a8600e963cc69da74691b8e6ca6ea9dc68d6486810224c9cc6d77467e9c
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 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 70144 bytes
SHA-256: c61959ac89cf3a2c27b2d6293fb4a5346453b2c53aee45fa67ccd44316ce9d97
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.92, consistent with packed or encrypted content.

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