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

Static analysis result for SHA-256 03984ab34c449699…

MALICIOUS

Office (OOXML) / .DOC

140.2 KB Created: 2021-02-07 17:10:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 1d508fa58e0d6718811a1a68126515e3 SHA-1: ae02e5ab06a412f13c84f97f5fd1daee73c1ba2a SHA-256: 03984ab34c449699ea9ac172cbac2f32a14cd7cf1b66cb3c36f80918bcb06f5b
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1566.001 Spearphishing Attachment

The sample contains VBA macros, including an AutoOpen macro, which is a common technique for executing malicious code upon opening a document. The script attempts to download a file from 'http://megawatt.bar/preview.jpg' and save it as 'C:\users\Public\tx.jpg', likely to execute a second-stage payload. The presence of CreateObject and HTTP requests strongly indicates a downloader functionality.

Heuristics 7

  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
  • ClamAV: Doc.Downloader.BlueWord12210-9918949-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.BlueWord12210-9918949-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — 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.microsoft.com/office/drawing/2014/chartex
    • 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/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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
a08fc270f97cbed159fbdde6bf986d79c5b78f44008a73fa63d669d58fbe451d		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2431 bytes
vbaProject_00.bin
d5857767b61388d335fecd793b5f7421ad3c3902a4b4a9d75cf3596ba129dbaa		 vba-project OOXML VBA project: word/vbaProject.bin 100352 bytes

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