Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 2b0b7f2d24191ba4…

MALICIOUS

Office (OOXML) / .XLSX

14.9 KB Created: 1996-10-14 23:33:28 UTC Authoring application: Microsoft Excel 15.0300
MD5: 0c00b6327f17a0f78c54dc580ea7d1db SHA-1: 9c8e5748a8725c886ddaf474af876f37a084506b SHA-256: 2b0b7f2d24191ba4c370cda70cdebe7d80c6d98379712c5d17a38cb60910b2c7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution: Malicious Link T1059.005 PowerShell T1204.002 User Execution: Malicious File

The file is an OOXML document containing an embedded OLE object, specifically identified as an Equation Editor object. Heuristics indicate this object exploits CVE-2018-0798 due to anomalous native stream properties. The document body contains a lure, instructing the user to 'ENABLE EDITING' to bypass security measures, a common tactic for macro-based malware delivery. The embedded OLE object is the primary indicator of malicious intent, likely serving as a dropper for further malicious activity.

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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
64395382990f5ed4b29a916d7eff4bc01bdef3646d25556a229f47a77f18c00e		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
ooxml_oleobject_00_ole10native_00.bin
03fc2c79aae0d0a49c9806f19ff1c1357f4b3df4843ed021861daedbc8bd4300		 ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: olE10NatIvE 1798 bytes

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