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

Static analysis result for SHA-256 747359001e75164b…

MALICIOUS

Office (OOXML) / .OLE

22.2 KB Created: 2019-01-11 10:54:01 UTC Authoring application: Microsoft Excel 12.0000
MD5: 09821bcaeb1a97121c432ab8bf254767 SHA-1: ff1e4455d52598111564b1983a24d3771945fa27 SHA-256: 747359001e75164b8acd4f248b89a3b53ff5b0befd7e22eebb81f52a829dadda
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an embedded OLE object identified as an Equation Editor, which is known to be vulnerable to CVE-2018-0798. This vulnerability allows for the execution of arbitrary code when the object is opened. The document body appears to be a logistics manifest, likely a lure to encourage opening the embedded object.

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
45b3d4a4e5cdcc6d26321c8d414c26c06661df3126bbe519791696d721817122		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
ooxml_oleobject_00_ole10native_00.bin
bb80547ec16dd5116da487ac214c76a09f482642550a8e7d9dd02c92473806f8		 ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: OLe10nAtIvE 1789 bytes

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