Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 6d7c64d5ad310f7e…

MALICIOUS

Office (OOXML)

69.9 KB Created: 2018-09-11 13:13:32 UTC Authoring application: Microsoft Excel 14.0300 First seen: 2019-05-31
MD5: ac77a90ded29a5cb0db7287d0a77f927 SHA-1: 827a4b6a7f071f547c6b4ffba986e0dcad11b95e SHA-256: 6d7c64d5ad310f7e7cc023644fc2d84f65265720c0e2b89b858b04e2052dff87
120 Risk Score

Malware Insights

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

The sample is an OOXML file 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 in Microsoft Equation Editor, to achieve code execution. The embedded object likely contains shellcode, suggesting the document is intended to deliver a malicious payload upon opening.

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: eaf32e5badad5e012b5949c0ed1ec13d59456880e10a5ddfbf999abad0a60b36
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 1526 bytes
SHA-256: 6a44bc349c1e1387ca3d56d42fccb690b01cff67056d12fd1bed18662e41ac48
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.