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

Static analysis result for SHA-256 7e0f7b85c414f29a…

MALICIOUS

Office (OOXML) / .DOC

261.5 KB Created: 2020-06-19 01:01:00 UTC Authoring application: Microsoft Office Word 15.0000
MD5: c276d86db0b3ea51946596b720f0e0da SHA-1: 607171e766967b1f86a5fda8719469551cc3b557 SHA-256: 7e0f7b85c414f29ae97811e9886ffbaa52a8de7d2ad62c797ff62a98184e8db0
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file is a malicious OOXML document containing VBA macros. The presence of a Document_Open macro and a CreateObject call indicates that the macros are designed to execute automatically when the document is opened. These macros likely download and execute a secondary payload, as suggested by the 'Suspicious extracted artifact' heuristic firing. No specific family could be identified, but the techniques used are common for macro-based malware delivery.

Heuristics 5

  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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/office/word/2010/wordprocessingCanvas
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • 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/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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7b437b0830ed1bec1ee57a86a8f80485fc4ca86ef4a8b45031c42d0dd05ca4d8		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1607 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
22f3d69c906f783e269b62f6c680458dc1536acd4eaab9d3388e9606f8e1bd7e		 vba-project OOXML VBA project: word/vbaProject.bin 10752 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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