Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 73a8f9ba34bf19e4…

MALICIOUS

Office (OOXML)

74.0 KB Created: 2021-05-19 05:37:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2021-05-26
MD5: 8322f08df933e6ffc656ed3d41d2a8dd SHA-1: b426d6d2a748117531767c0823f8551e212fdcda SHA-256: 73a8f9ba34bf19e43f7658d52d8727595514899fb9b2e5ce7bfc42fd6b749d97
82 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a malicious OOXML document that leverages an external OLE object, identified as related to CVE-2017-8759. This object points to a remote document at 'http://facextrade.com.br/wp-imcludes/4.doc', indicating an attempt to download and execute a secondary payload. The presence of multiple EMF objects is common in such exploits.

Heuristics 3

  • OOXML OLE2Link remote document — CVE-2017-8759 related high CVE related CVE_2017_8759_RELATED
    Document contains an o:OLEObject Type=Link whose external oleObject relationship fetches a remote Office-looking document. That is the OOXML OLE2Link staging shape used by CVE-2017-8759 campaigns when the remote document/WSDL supplies the SOAP moniker payload; the local file alone does not contain the WSDL body needed for an exact match.
  • External OLE object relationship high OOXML_EXTERNAL_OLE_OBJECT
    Document contains an oleObject relationship whose target is an external HTTP(S) URL. Office resolves this through OLE/object update paths rather than as a normal user-clicked hyperlink.
  • 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://facextrade.com.br/wp-imcludes/4.doc In document text (OOXML body / shared strings)
    • http://facextrade.com.br/wp-imcludes/9.docIn document text (OOXML body / shared strings)
    • http://facextrade.com.br/wp-imcludes/6.docIn document text (OOXML body / shared strings)
    • http://facextrade.com.br/wp-imcludes/1.docIn document text (OOXML body / shared strings)
    • http://facextrade.com.br/wp-imcludes/7.docIn document text (OOXML body / shared strings)
    • http://facextrade.com.br/wp-imcludes/10.docIn document text (OOXML body / shared strings)
    • http://facextrade.com.br/wp-imcludes/3.docIn document text (OOXML body / shared strings)
    • http://facextrade.com.br/wp-imcludes/5.docIn document text (OOXML body / shared strings)
    • http://facextrade.com.br/wp-imcludes/2.docIn document text (OOXML body / shared strings)
    • http://facextrade.com.br/wp-imcludes/8.docIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/inkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2017/model3dIn 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/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2018/wordml/cexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2016/wordml/cidIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2018/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2020/wordml/sdtdatahashIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn 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 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 2112 bytes
SHA-256: aaa5f9ab410b974cd5f719662f01d6807034179c9b54efb1cfcfc8ea162d9f4c
emf_01.emf ooxml-emf OOXML EMF part: word/media/image3.emf 2944 bytes
SHA-256: 4396f1180efaf1b5eb13afd938954a9b276af00033f1f8ba7bdfbc4a2f50bb2e
emf_02.emf ooxml-emf OOXML EMF part: word/media/image4.emf 2944 bytes
SHA-256: 155ba8ba26262ced9714116d7fac320c2ec641e3e3345107dc451aba18668697
emf_03.emf ooxml-emf OOXML EMF part: word/media/image5.emf 2944 bytes
SHA-256: 182ece5176ac225401c75b737574e0e6ec38c4af05b78ca838b2ea954db55414
emf_04.emf ooxml-emf OOXML EMF part: word/media/image6.emf 2944 bytes
SHA-256: 037490ff2be625f792f8b1211f6ef41e1175bcba6404931796ad565d2baabe20
emf_05.emf ooxml-emf OOXML EMF part: word/media/image7.emf 2944 bytes
SHA-256: 758f121fe060a7f97ec4374c9ca1d5c05620eb5c078864b01932e96634281bf9
emf_06.emf ooxml-emf OOXML EMF part: word/media/image8.emf 2944 bytes
SHA-256: 162d116369e2f3654a4cb269bfc74f9c46361b9b98e0f9e5bac6afb8593bcb80
emf_07.emf ooxml-emf OOXML EMF part: word/media/image9.emf 2944 bytes
SHA-256: 1b4616b0a55945d2e2a791fddc53625cb26abfc52870658840e3b67e62f65f15
emf_08.emf ooxml-emf OOXML EMF part: word/media/image10.emf 2944 bytes
SHA-256: 7b9d6209660558dddc299a956b5ac9fca580352ad6f62032cc29af4950379cdc
emf_09.emf ooxml-emf OOXML EMF part: word/media/image11.emf 2944 bytes
SHA-256: d9a38df823fc9ca28cb8843da82dc44cdc6b2f0411053d8350428774af28f4cf