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

Static analysis result for SHA-256 4a16071cd4a31e06…

MALICIOUS

Office (OOXML) / .DOC

530.8 KB Created: 2023-06-07 23:33:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: eb9715a5304e3dd9c2756ac51ab3234e SHA-1: 8aaf84974c428c49dde6bf797cda387a3a8febb5 SHA-256: 4a16071cd4a31e06e7a47f7f449d846991f6dbf476861c4b4ffa806705efdd4e
228 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample is an OOXML document containing VBA macros. Critical heuristics indicate the use of Shell() and WScript.Shell, suggesting the macros are designed to execute arbitrary commands. The presence of an embedded URL, https://mitmachim.top/post/632852, further supports the likelihood that this document is a lure to download and execute a secondary payload. The VBA code likely uses CreateObject to facilitate this execution.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • 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
  • External hyperlinks (1) low OOXML_EXTERNAL_HYPERLINKS
    Document contains 1 external hyperlink — clickable URLs are stored as external relationships. First target: https://mitmachim.top/post/632852
  • 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/2009/07/customui
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
cc164672a059eade8751fa2ca9cf7d00b1fef66c85c31da214dc78b65e59b1c5		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 654288 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 9 shell/COM execution token(s). Carved artifact contains 49 Chr/ChrW string-construction calls.
vbaProject_00.bin
95c917d9e824e92e9fccf4a77613883e97636ff4e1e4575bbe55122e527be110		 vba-project OOXML VBA project: word/vbaProject.bin 1149952 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 6 shell/COM execution token(s). Carved artifact contains 13 Chr/ChrW string-construction calls.

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