Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 8bc253c58240d6f1…

MALICIOUS

Office (OOXML)

9.2 KB Created: 2020-06-21 19:35:20 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2020-09-07
MD5: 0dbff60446d197edcb345aa267dd9df2 SHA-1: a43e873da8987496d772185553638be8883ad94c SHA-256: 8bc253c58240d6f1aab64f453732e2bb003fe9d0e61d8f6919411dac690a3ff0
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: 79b74869d3e32e2f3e8901466730e4f67b223553abc8489bb5df22c984aa43fd
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: OLE10nAtIve 2358 bytes
SHA-256: 26be8187f8164fcb434811a1a4930cb8087b35ac6f7ceda5ae281091e668b18d

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