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

Static analysis result for SHA-256 f50ee030224bf617…

MALICIOUS

Office (OOXML) / .DOCX

967.5 KB Created: 2017-09-11 14:05:00 UTC Authoring application: Microsoft Office Word 15.0000
MD5: e3a2c3a025d1aee589026d09e2a0ca50 SHA-1: 177af8f6e8d6f4952d13f88cdf1887cb7220a645 SHA-256: f50ee030224bf617ba71d88422c25d7e489571bc1aba9e65dc122a45122c9321
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

This OOXML document contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening. The presence of a remote image beacon suggests an attempt to track document opens or download additional content. The ClamAV detection as 'Doc.Dropper.Agent-6366822-0' strongly indicates a dropper functionality. The document body discusses financial monitoring and potential new restrictions, likely a social engineering lure to mask the malicious intent of the embedded VBA code.

Heuristics 8

  • ClamAV: Doc.Dropper.Agent-6366822-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6366822-0
  • 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
  • Remote image (web beacon / tracking pixel) medium OOXML_IMAGE_BEACON
    Document references an external image URL — loads automatically on open, revealing IP address and timestamp to the server (used for phishing tracking and NTLM hash theft on corporate networks)
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/document.xml.rels: http://pbank.co.ua/img/rKPGshUCwICOdqe1P8Ig5odmykCedtG2zar.png
  • 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
84fd8462122028c4a64bf635c87165946e421dcfc912b23cdad9153037f427be		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 5313 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
2a7b28e031610d0980b1d3fa3933cc778d8661db883d684283af28a45ad6a9d3		 vba-project OOXML VBA project: word/vbaProject.bin 35840 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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