Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5db01c874c932cfb…

MALICIOUS

Office (OLE)

114.0 KB Created: 2017-06-01 16:10:00 Authoring application: Microsoft Office Word First seen: 2017-10-28
MD5: 9d0be45a5825a0c640be15cc00a7e2ba SHA-1: f054a6576666964b58b3f32dad04621e925e3efa SHA-256: 5db01c874c932cfb52228d8d7e355b5f60277e3d0d65157c0f1b0b9961cde604
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The sample contains VBA macros that, when triggered by user interaction (clicking a button), execute a command-line process. This process displays a fake Windows update message, attempting to deceive the user into believing a system update is occurring. The primary technique observed is the execution of Windows Command Shell commands via VBA.

Heuristics 5

  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
        Call Shell("cmd.exe /K ECHO Mise a jour de la station de travail %COMPUTERNAME% pour %USERNAME%, veuillez patienter... & ping -n 6 127.0.0.1 > nul & ECHO Mise a jour a jour complete !", vbNormalFocus)
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
    Matched line in script
        Call Shell("cmd.exe /K ECHO Mise a jour de la station de travail %COMPUTERNAME% pour %USERNAME%, veuillez patienter... & ping -n 6 127.0.0.1 > nul & ECHO Mise a jour a jour complete !", vbNormalFocus)
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • 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://schemas.openxmlformats.org/drawingml/2006/main In 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) 784 bytes
SHA-256: a1cf57db67ddbb95d6100c9eee48515a7528478f0dc4ed5ded66a80bde28ec53
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
Attribute VB_Control = "Mise_a_jour_de_la_station_de_travail, 0, 0, MSForms, CommandButton"
Private Sub Mise_a_jour_de_la_station_de_travail_Click()
    Call mise_a_jour_windows
    'Call bzamhgnpIX
End Sub


Attribute VB_Name = "Module1"

Sub mise_a_jour_windows()

    Call Shell("cmd.exe /K ECHO Mise a jour de la station de travail %COMPUTERNAME% pour %USERNAME%, veuillez patienter... & ping -n 6 127.0.0.1 > nul & ECHO Mise a jour a jour complete !", vbNormalFocus)

End Sub

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