Malicious Office (OOXML) / .DOC — malware analysis report

Static analysis result for SHA-256 09ec82acd46ed13c…

MALICIOUS

Office (OOXML) / .DOC

316.8 KB Created: 2022-09-13 06:14:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2022-09-14
MD5: 5e66259b58cd7493c782e1263c7be390 SHA-1: c1728790fb916df3488c35ddf6165c9efec4e9f2 SHA-256: 09ec82acd46ed13c7d7b4e2c3342af077e4382952339e5793e996376f397554d
202 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1059 Command and Scripting Interpreter

The sample is a malicious OOXML document that leverages CVE-2017-0199 to load an external OLE object. This object contains a VBA macro that attempts to download a second-stage payload from the provided mediafire URLs. The embedded OLE object and its associated macro are strong indicators of a downloader or initial access mechanism.

Heuristics 6

  • OOXML OLE2Link remote loader — CVE-2017-0199 related high CVE related CVE_2017_0199_RELATED
    Document contains an o:OLEObject Type=Link whose external oleObject relationship points to a remote URL. This is the OOXML OLE2Link activation shape associated with CVE-2017-0199 delivery, but the local file does not expose URL Moniker bytes or a weaponized extension/content type, so the exact CVE cannot be proven statically.
  • Embedded Office object carries macros critical OFFICE_EMBEDDED_MACRO_OBJECT
    This document embeds a second Office file that itself contains a VBA macro project or an Excel 4.0 (XLM) macro sheet. Hiding a macro-bearing workbook or document inside another document — frequently under an obfuscated, non-standard part name — is a macro-smuggling technique that defeats scanners which only inspect the outer document's macro storage. No benign authoring workflow stages a hidden macro project this way.
  • 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.
  • 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
  • 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 https://www.mediafire.com/file/tli8d8xqvx6z0zz/update.doc/file
    • https://www.mediafire.com/file/6vip6utwodclo5k/1.htm/file
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • http://schemas.microsoft.com/office/2019/extlst
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2018/wordml/cex
    • http://schemas.microsoft.com/office/word/2016/wordml/cid
    • http://schemas.microsoft.com/office/word/2018/wordml
    • http://schemas.microsoft.com/office/word/2020/wordml/sdtdatahash
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
e293b26ba24822e789bddaf252f66c667259be5ffa2fec48c5b7baa7802c5548
ooxml-ole-object OOXML embedded OLE part: word/embeddings/Microsoft_Excel_97-2003_Worksheet1.xls 36864 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
ooxml_oleobject_01.bin
bd2eaf9a11cf7f181239bca96ab37eaf4bb077d6200f5b386fde4cab5e7d9373
ooxml-ole-object OOXML embedded OLE part: word/embeddings/Microsoft_Excel_97-2003_Worksheet.xls 36864 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
ooxml_oleobject_02.bin
e255bd24730eb8613ee8a81033d4c97b14283ae0e01baa5c941867fbb7ea1810
ooxml-ole-object OOXML embedded OLE part: word/embeddings/Microsoft_Excel_97-2003_Worksheet4.xls 36864 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
ooxml_oleobject_03.bin
0fefe416888a41939d0d7143846844edac1b4ee1ea5fd8f98a893ade7a62d34f
ooxml-ole-object OOXML embedded OLE part: word/embeddings/Microsoft_Excel_97-2003_Worksheet3.xls 36864 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
ooxml_oleobject_04.bin
2bb63b71df4a995b3803b09eff9da9c61d6ec6a30d37c67eb693dfe0a009c27c
ooxml-ole-object OOXML embedded OLE part: word/embeddings/Microsoft_Excel_97-2003_Worksheet2.xls 36864 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.