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

Static analysis result for SHA-256 7ddda4ee9691dfb9…

MALICIOUS

Office (OOXML) / .DOC

211.5 KB Created: 2020-05-21 17:33:00 UTC Authoring application: Microsoft Office Word 14.0000
MD5: fe977f2abc0138387a399dafb1521b7c SHA-1: 7cd4c7a81b57af0321ef0f00e2e0558a1d035eaf SHA-256: 7ddda4ee9691dfb9cbe912930047586403e50d7e20ec9e7695fbdd84697d8a3f
200 Risk Score

Malware Insights

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

The presence of a Document_Open macro and GetObject calls, combined with ClamAV detecting this as a Doc.Dropper.HexEncodedEXEHeader, strongly indicates a malicious dropper. The VBA macros are likely responsible for downloading and executing a second-stage payload. No specific family could be identified from the available evidence.

Heuristics 6

  • ClamAV: Doc.Dropper.HexEncodedEXEHeader-9789587-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.HexEncodedEXEHeader-9789587-1
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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/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
4af4c63f8b2d4af866eb546c1ee7acbf84d25516b084f40ecab34dfc6db6a5b6		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1647 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 23 Chr/ChrW string-construction calls.
vbaProject_00.bin
85b3f137a1982946d87baa0ba6e06d79ba7d79560e99469842249f7c4f7179fb		 vba-project OOXML VBA project: word/vbaProject.bin 11776 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.