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

Static analysis result for SHA-256 488cfaeffa8feff5…

MALICIOUS

Office (OOXML) / .DOC

18.2 KB Created: 2022-04-27 18:08:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2022-05-09
MD5: 4f1d2777f28dcdfbe8e4e94fb73c1ab9 SHA-1: 7281df55cf3bf0dc8baab408f7991e0e6d414ef3 SHA-256: 488cfaeffa8feff5a491c4a518b5e87a3105ce009aaa0e57dc517ca0889c38c4
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic

The OOXML document contains VBA macros, specifically an AutoOpen macro, which is a common technique for initial execution. The VBA code references PowerShell, indicating an attempt to launch a secondary execution stage. The presence of 'macros.bas' and 'vbaProject_00.bin' further confirms the macro-based nature of this malicious document. The script appears to be designed to download and execute a further payload, though the exact URL or command is obfuscated.

Heuristics 5

  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • 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://138.201.149.43/1Kaufvertrag682/as.ps1
    • 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.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
797253dc4288547a818f3a8d5919b8142571494322c6e4e2d2d494b42552f9f7		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2467 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
def192b4a8db7e0c21a8b9ce8f2a9b311970c9ae3add40897c414f53ad9e8897		 vba-project OOXML VBA project: word/vbaProject.bin 13312 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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