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

Static analysis result for SHA-256 88b8d6f030dec123…

MALICIOUS

Office (OOXML) / .XLSX

10.0 KB Created: 2023-09-27 08:05:40 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2023-10-26
MD5: 491c16b1458f7d68b5677fadc1709886 SHA-1: 6c3a16b91b5a1cc730c2dc7642074bd3888de616 SHA-256: 88b8d6f030dec1230b2ab2aa8dfa86c5d1477d30860bf3a9e2f4eb8a37fb4a15
100 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model T1204.002 Malicious File

The file contains an embedded OLE object, specifically identified as an Equation Editor object exhibiting characteristics of CVE-2018-0798. This indicates the document is designed to exploit this vulnerability when opened. No document body text or scripts were extracted, but the presence of the malicious OLE object is sufficient evidence of an exploit attempt.

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.
  • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
2a3a2293828d2a71b7ff3b3323596d22ca8374efa33d3b2dd47f7f78de83a303		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
ooxml_oleobject_00_ole10native_00.bin
3d2d2c07aff066ae523af17207847ae0717f87ec8c6d3b975373dc3e9ef3545b		 ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: oLe10nAtivE 1773 bytes

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