Office (OOXML) malware analysis — malicious · c36e3ea52302a534

MALICIOUS

Office (OOXML)

440.6 KB Created: 2012-01-10 16:58:00 UTC Authoring application: Microsoft Office Outlook 12.0000 First seen: 2015-10-02

MD5: 3085ffde81e897bdd8a8b426037c7890 SHA-1: adf0cf993560b565a8c28f9283bbcd4cde13d827 SHA-256: c36e3ea52302a534fc5515f900bea9ffb68786d60684dfb5a05ee93f8f715641

84 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is an OOXML document containing an embedded OLE object that drops an executable file named 'FlashPresentation.scr'. The document body presents a fake technical task for website development, likely a lure to encourage the user to interact with the embedded object. The embedded object is identified as a risky file that drops an auto-executable payload, indicating a malicious intent to execute arbitrary code.

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 info 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.openxmlformats.org/markup-compatibility/2006 In document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

Extracted artifacts 2

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	495616 bytes
SHA-256: `c0b111c9b724b615b0d68aad8572ff5c8774c4a0b4d40b5bbcf46015a5a63a46`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.65, consistent with packed or encrypted content.
`ooxml_oleobject_00_ole10native_00.bin`	ole-package	OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native	416374 bytes
SHA-256: `4182d83907f8ac6b29c972d6acfc8102af1ac484f9049272b079176dd9d4eb2d`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.

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