Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8d67450248d3a7f3…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2012-06-14
MD5: 56016861ad475c59cb53dd2788f2f012 SHA-1: 6aae3615211c81fc48e68d2b5337eb98dd0616b8 SHA-256: 8d67450248d3a7f34801863d07edd087fd59ef69c130a24c6762b34777df9085
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file contains legacy WordBasic macro code, identified by the 'RSN MACRO VIRUS' marker and the 'OLE_LEGACY_WORDBASIC_MACRO_VIRUS' heuristic. The embedded text suggests this is a known type of malicious macro file. The macro code itself appears to be designed to execute malicious functions, as indicated by the presence of auto-execute functions like 'aUTOOpen' and 'CopySaveAs'.

Heuristics 3

  • ClamAV: Win.Trojan.NOP-5 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.NOP-5
  • 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) 625 bytes
SHA-256: 0a5c16fa827577e6a0ea3971a1a80b47f5c82ee7a9d1609f948a95a0b5b13e38
Preview script
First 1,000 lines of the extracted script
,
MAIN
   Jakutsk by me          /dp" /That's engoy to prove my power /dp" /Say by to you files            /dp" /                                                    
, - * lll
dlg @cmd0054
dlg
dlg
dlg = 0 dlg = 1
Who$ = @cmd818d @cmd8025 , 4
@cmd80c2 "FileSaveAs" , Who$ = ":CopySaveAs"
@cmd80c2 "CopyOpen" , Who$ = ":aUTOOpen"
@cmd0054 dlg 27756
MAIN
   Jakutsk by me          /dp" /That's engoy to prove my power /dp" /Say by to you files            /dp" /                                                    
Who$ = @cmd818d @cmd8025 , 4
@cmd80c2 Who$ = ":CopySaveAs" , "FileSaveAs"
@cmd80c2 Who$ = ":aUTOOpen" , "CopyOpen"

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