Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 7096fd782664b0fe…

MALICIOUS

Office (OOXML)

25.3 KB Created: 2019-07-22 18:46:12 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2019-11-20
MD5: 6627a5c88c08a58950c5f80d272436cd SHA-1: a47aad1cdce82ec3e7025bab312e2f0dcbfc8ba0 SHA-256: 7096fd782664b0fe341f52346df445176be40ca64419b420cb467d3f93c5e91a
120 Risk Score

Malware Insights

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

The file is an OOXML document containing an embedded OLE object, specifically identified as an Equation Editor object. Heuristics indicate a high likelihood of exploitation for CVE-2018-0798 due to an anomalous Equation Editor native stream. This suggests the document is designed to exploit this vulnerability to execute a secondary payload, likely shellcode, as indicated by the static triage findings. The document body content appears to be a fabricated order or price list, likely a lure.

Heuristics 4

  • 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.
  • CVE-2018-0798 — anomalous Equation Editor native stream high CVE likely CVE_2018_0798_EQUATION_NATIVE_ANOMALY
    Embedded Equation Editor OLE data contains anomalous native stream bytes consistent with a CVE-2018-0798-style Equation Editor exploit. This is treated as likely CVE evidence because the Equation object is malformed and payload-like, but it does not match the exact public matrix-overflow byte signature.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Suspicious extracted artifact medium 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 3584 bytes
SHA-256: edf5ba6f979d69aaed7317127ca52b5c4c6091bcbfea7762da872d882f0423dc
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: ole10naTiVE 1435 bytes
SHA-256: 97bbfc76bd017b30bfcdc8ec94fda77b20ff99413d9273b4ad533f6729e1630c
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL

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