Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0822feca41765949…

MALICIOUS

Office (OOXML)

18.3 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2019-11-20
MD5: 46b1081a4e33ca444d8e6759b46e9f7f SHA-1: 738bfae05ee963a2f56e2b3c64d6ba656df78ab4 SHA-256: 0822feca417659495436fece2601343c6ee4d7a7ed676ebca3ce40350cb9d1b9
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an Office document containing an embedded OLE object, specifically an Equation Editor object. High-severity heuristics indicate the exploitation of CVE-2018-0798, which allows for arbitrary code execution. The document body appears to be a logistics manifest, likely a lure to entice the user to open the malicious content.

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 4096 bytes
SHA-256: 12888cb31d390e2ee56b65a91e0488c3fd4b35f5e0f0b85d89d0d81fbed4d003
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: Ole10NaTiVe 2011 bytes
SHA-256: 13b9e3336e84491d62d1bf7ae6acb606191c4fae59cbffdcfa059d1ba283dcc7

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