Office (OOXML) malware analysis — malicious · f1b84c06f82af623

MALICIOUS

Office (OOXML)

132.6 KB Created: 2020-04-07 01:57:20 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2020-05-25

MD5: bd1963de3e7884f624b5bf3f547eff77 SHA-1: f48b6c14016939aa5ff6069acdbfb2a7c3e067a0 SHA-256: f1b84c06f82af623f13fec804dfca972f4a1518434e8b842014563af302ea7e6

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is an OOXML file containing an embedded OLE object identified as an Equation Editor object. This is a common technique used to exploit vulnerabilities, such as CVE-2017-11882, to achieve arbitrary code execution on the victim's machine. No scripts or document body text were extracted, limiting further analysis of the specific payload.

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.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
Embedded OLE object medium OOXML_OLE_OBJECT

Document contains an embedded OLE object

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/oleObject1.bin	5936 bytes
SHA-256: `2ae37e3732fdb8e1ffb66439899618b1505cd5dcbbc0823ed08adb82b6d51867`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): cmd /c notepad.exe y.js&CSCRIPt %tmp%\y.js C
`emf_00.emf`	ooxml-emf	OOXML EMF part: xl/media/image1.emf	2485848 bytes
SHA-256: `d5e0073391fd3e16f36b0e62738a2ca70f16798688ddc88adcf17278c0329c5b`
`emf_01.emf`	ooxml-emf	OOXML EMF part: xl/media/image2.emf	1540 bytes
SHA-256: `0f62777494d72df036f363d2a3bb8077fbbaa7bc09eb5d3f456133f1275119e1`

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