Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 6b3ed0f5e2c28347…

MALICIOUS

Office (OOXML)

170.9 KB Created: 2015-06-05 18:19:34 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-04-25
MD5: 215facf44f638a64d04ae3ca46213549 SHA-1: baa24c2fc8d174e00d84b514452d420d1e589240 SHA-256: 6b3ed0f5e2c28347cb6c1f6d9e501df282d81a5d3c0d11d9346ade939093ca8b
96 Risk Score

Heuristics 4

  • ClamAV: Xls.Downloader.IcedID-9f1f1d193a2a2a2b-9951463-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.IcedID-9f1f1d193a2a2a2b-9951463-0
  • VBA project inside OOXML medium 1 related finding OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Auto_Open macro low OLE_VBA_AUTO
    Auto_Open macro
    Matched line in script
    Private Sub Auto_Open()
  • Hidden worksheet (hidden) low OOXML_HIDDEN_SHEET
    Excel workbook contains 3 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 727 bytes
SHA-256: 2f26ac96bba202e05dcf847261e1d1663d430574538bb7b407a117ed8f397467
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Лист1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "ЭтаКнига"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True


Attribute VB_Name = "Module1"
Private Sub Auto_Open()
Application.Run Sheets("Brisk").Range("CD5")
End Sub
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 10240 bytes
SHA-256: 0de4024631c53d9eb47dbcdea5b13499fda054ab40208b596b6f142f38fda5c3

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