Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 ff068d5bce289c2a…

MALICIOUS

Office (OOXML)

9.5 KB Created: 2018-08-29 14:23:22 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2019-01-11
MD5: ec567e9c5b4c140cca9dbdaf98b3b24d SHA-1: 0c014023f550d3c3d3413afc53fb557087d5f6cc SHA-256: ff068d5bce289c2a7d32d3015b6c75f3ef1f4e41b99f4c1f5c05753ac6c56231
100 Risk Score

Malware Insights

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

The sample contains an embedded OLE object identified as a Microsoft Equation Editor object. Heuristics indicate a high likelihood of exploitation for CVE-2018-0798, which allows for arbitrary code execution. This is a common technique for delivering malicious payloads via spearphishing attachments.

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 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4608 bytes
SHA-256: b0660d0b60dafebdc600f21ede311a677c2c19a5faf5ab5800fb34c8f896fe80
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: OLE10NatIve 2075 bytes
SHA-256: bbf80323fff6402f2566d916d240e2fe5c2c7a6d2d29f48bac7c8b5b175740ac

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