Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 a655e5d17641483d…

MALICIOUS

Office (OOXML)

133.4 KB Created: 2013-04-04 07:41:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2015-09-24
MD5: 6d051c8a2a961011f7e68cb1e0c2cda0 SHA-1: abce28ffae833da66accb46839ac2f61c42863bb SHA-256: a655e5d17641483dabf4d25141e9dfa2fd157611bd6386df4a6eca4acf4cfe93
204 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 that drops an executable file named 'product images.exe'. The document body prompts the user to double-click the icon to extract content, a common social engineering tactic. The embedded OLE object also contains URLs pointing to a domain that likely hosts the payload, indicating a spearphishing attachment delivery method.

Heuristics 5

  • ClamAV: Win.Trojan.Limlspy-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Limlspy-1
  • 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
  • Payload URL recovered from embedded OLE object (5 URLs) info OOXML_EMBEDDED_OBJECT_URL
    An embedded OLE object (xl/word/ppt embeddings) carries a next-stage download URL in its Ole10Native/Package stream — stored literally (incl. UTF-16) or base64-encoded — which the package-level URL sweep does not see. Surfaced as an IOC; self-validating (only real payload hosts).
  • 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://www.limitlessproducts.org/Limitless/Login/screenshots/default.png In document text (OOXML body / shared strings)
    • http://www.limitlessproducts.org/Limitless/Login/upload.phpIn document text (OOXML body / shared strings)
    • http://www.limitlessproducts.org/Limitless/Login/screenshots/In document text (OOXML body / shared strings)
    • http://www.limitlessproducts.org/Limitless/Login/submit_log.phpIn document text (OOXML body / shared strings)
    • http://codeinject.co.uk/ip.phpIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In 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.microsoft.com/office/word/2010/wordprocessingDrawingIn 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/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 176640 bytes
SHA-256: 075eb46003cf65d78700395355880520d394b6866a1b1386e40b4efbc69911a5
Detection
ClamAV: Win.Trojan.Limlspy-1
Obfuscation or payload: unlikely
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 167290 bytes
SHA-256: fb14455063189f24e0fb6d8540867ec123a4e4c5d851b57f775f9d14524e699b
Detection
ClamAV: Win.Trojan.Limlspy-1
Obfuscation or payload: unlikely
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5040 bytes
SHA-256: 74f4a4d27c9cb480ca1961ff023e0e77538fbd9282e5f6276543d2d1a0ba165c

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