Office (OOXML) malware analysis — malicious · 670b4d3650f57226

MALICIOUS

Office (OOXML)

13.95 MB Created: 2021-08-31 20:15:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2021-09-14

MD5: 89ff145c24e73b84413527e5e328ade7 SHA-1: aa48406cc96d58188bff90c8a14a06ec815822a9 SHA-256: 670b4d3650f57226a48fe36ad47910c4ed6b4ee44b52bcd6359ac20c234e8029

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a malicious OOXML document containing an embedded OLE object. This object, identified as 'error.exe', is flagged as an auto-executable payload. The presence of this embedded executable strongly suggests the document is designed to deliver malware upon opening, likely via spearphishing.

Heuristics 4

Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE

OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
Embedded OLE object medium OOXML_OLE_OBJECT

Document contains an embedded OLE object
Suspicious extracted artifact medium 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 URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.microsoft.com/SMI/2016/WindowsSettings In document text (OOXML body / shared strings)

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin`	ooxml-ole-object	OOXML embedded OLE part: word/embeddings/oleObject1.bin	8388608 bytes
SHA-256: `1f9f423b4fab6c2bc2f7058de086fa519a95bb57a086780b88866491d00ef596`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS, SC_STR_GETPROCADDRESS, SC_STR_LOADLIBRARY Static shellcode analysis recovered API/import strings: GetProcAddress, CreateProcessW
`ooxml_oleobject_00_ole10native_00.bin`	ole-package	OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native	8388608 bytes
SHA-256: `020a10974f271aa704b494f328d39f925ef85809db115fcbae24b8bc35197fff`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS, SC_STR_GETPROCADDRESS, SC_STR_LOADLIBRARY Static shellcode analysis recovered API/import strings: GetProcAddress, CreateProcessW Carved artifact entropy is 7.65, consistent with packed or encrypted content.
`ooxml_oleobject_00_ole10native_00_error.exe`	ole-package-payload	OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=error.exe; full_path=C:\Users\Ion\AppData\Local\Temp\{EC3F3553-E89D-424C-99B5-A8865B2EAC34}\error.exe; temp_path=; def_file=	8388608 bytes
SHA-256: `221e7a415cb14d9cbae4582b6ceae24dc52a0744935951c71ff69c6d894c57a1`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS, SC_STR_GETPROCADDRESS, SC_STR_LOADLIBRARY Static shellcode analysis recovered API/import strings: GetProcAddress, CreateProcessW Carved artifact entropy is 7.65, consistent with packed or encrypted content.
`emf_00.emf`	ooxml-emf	OOXML EMF part: word/media/image1.emf	153887 bytes
SHA-256: `4408854455f6987ff207c664a343d00c3501ddc8654ffd2f6a33ca72293aa1dc`

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