Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ed702fffac2cca04…

MALICIOUS

Office (OLE)

8.0 KB First seen: 2012-06-14
MD5: f1506a8f235b94ac71023139c408e5ed SHA-1: e750be042bb9f5a94d6c85077592a213bd2c5a16 SHA-256: ed702fffac2cca04edb30251df12b7a872f41b8c1f319832ea73ed6ddc812ee3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file exhibits characteristics of a legacy macro virus, specifically referencing 'RSN MACRO VIRUS' and 'Goat' file markers. The presence of 'CopyAutoOpen' and 'AutoOpen' strings suggests an intent to execute malicious routines automatically when the document is opened. This points to a classic macro-based malware delivery mechanism.

Heuristics 3

  • ClamAV: Win.Trojan.CopyAuto-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.CopyAuto-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) 1997 bytes
SHA-256: 38e1e637e863239ef69ebf0851e8851b039cfa279b3dbfe87693ea34d3a347bb
Preview script
First 1,000 lines of the extracted script
= = = =
MAIN
i = 1 @cmd80b7
@cmd80b8 i = "AutoOpen" NormalAutoOpen = 1
@cmd80b8 i = "CopyAutoOpen" NormalCopyAutoOpen = 1
i
i = 1 @cmd80b7 1
@cmd80b8 i , 1 = "AutoOpen" ActiveAutoOpen = 1
@cmd80b8 i , 1 = "CopyAutoOpen" ActiveCopyAutoOpen = 1
i
NewFileName$ = @cmd8025
NormalAutoOpen = 0
@cmd00de , = @cmd8025 , = @cmd818c 2 = "\Normal.dot" , = "CopyAutoOpen" , = "CopyAutoOpen" , = 3
@cmd00de , = @cmd818c 2 = "\Normal.dot" , = @cmd818c 2 = "\Normal.dot" , = "CopyAutoOpen" , = "AutoOpen" , = 3
NormalCopyAutoOpen = 0
@cmd00de , = @cmd8025 , = @cmd818c 2 = "\Normal.dot" , = "CopyAutoOpen" , = "CopyAutoOpen" , = 3
ActiveAutoOpen = 0
@cmd0054 = NewFileName$ , = 1
@cmd00de , = @cmd818c 2 = "\Normal.dot" , = NewFileName$ , = "CopyAutoOpen" , = "CopyAutoOpen" , = 3
@cmd00de , = NewFileName$ , = NewFileName$ , = "CopyAutoOpen" , = "AutoOpen" , = 3
ActiveCopyAutoOpen = 0
@cmd00de , = @cmd818c 2 = "\Normal.dot" , = NewFileName$ , = "CopyAutoOpen" , = "CopyAutoOpen" , = 3
@cmd0054 = NewFileName$ , = 1
MAIN
i = 1 @cmd80b7
@cmd80b8 i = "AutoOpen" NormalAutoOpen = 1
@cmd80b8 i = "CopyAutoOpen" NormalCopyAutoOpen = 1
i
i = 1 @cmd80b7 1
@cmd80b8 i , 1 = "AutoOpen" ActiveAutoOpen = 1
@cmd80b8 i , 1 = "CopyAutoOpen" ActiveCopyAutoOpen = 1
i
NewFileName$ = @cmd8025
NormalAutoOpen = 0
@cmd00de , = @cmd8025 , = @cmd818c 2 = "\Normal.dot" , = "CopyAutoOpen" , = "CopyAutoOpen" , = 3
@cmd00de , = @cmd818c 2 = "\Normal.dot" , = @cmd818c 2 = "\Normal.dot" , = "CopyAutoOpen" , = "AutoOpen" , = 3
NormalCopyAutoOpen = 0
@cmd00de , = @cmd8025 , = @cmd818c 2 = "\Normal.dot" , = "CopyAutoOpen" , = "CopyAutoOpen" , = 3
ActiveAutoOpen = 0
@cmd0054 = NewFileName$ , = 1
@cmd00de , = @cmd818c 2 = "\Normal.dot" , = NewFileName$ , = "CopyAutoOpen" , = "CopyAutoOpen" , = 3
@cmd00de , = NewFileName$ , = NewFileName$ , = "CopyAutoOpen" , = "AutoOpen" , = 3
ActiveCopyAutoOpen = 0
@cmd00de , = @cmd818c 2 = "\Normal.dot" , = NewFileName$ , = "CopyAutoOpen" , = "CopyAutoOpen" , = 3
@cmd0054 = NewFileName$ , = 1

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