Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 e9c5fef7ea5bb5b4…

MALICIOUS

Office (OOXML)

21.9 KB Created: 2015-01-22 05:38:25 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2020-02-04
MD5: 3ecf1907a468efefbdf9ed6ffb6bfdb9 SHA-1: 17fe18a43d21820a4ca396e642e59d7498c2edca SHA-256: e9c5fef7ea5bb5b473cd80aba2a84a84c32362e07f3f110b1b75354a0db8e411
120 Risk Score

Malware Insights

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

The file is an Office document containing an embedded OLE object, specifically identified as an Equation Editor object. Heuristics indicate this object is anomalous and exploits CVE-2018-0798, a vulnerability allowing for arbitrary code execution. The embedded object likely serves as a dropper for a secondary payload, although no specific payload or network indicators were extracted from this sample.

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 4096 bytes
SHA-256: 6718a3f927e52baaff5f06cb6952a1eea05f3ff2d602cf782051d3e21c252f49
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 1671 bytes
SHA-256: 7acd38892ebfc3cc05eacf404f7076917df323eab2a1b4bd1eac4df7589d176d
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL

Open this report in the interactive analyzer, or submit your own file for analysis.