Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7cad0105a58594c8…

MALICIOUS

Office (OLE)

7.0 KB First seen: 2012-06-14
MD5: cd5f1b2ff3709e8056412839a83ef916 SHA-1: 012b398e352b980669c31eb3a17a28a19f4d477e SHA-256: 7cad0105a58594c81900caf7f0afb94aeb9d5d88710f5aa84586753ebf512dce
100 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample exhibits characteristics of a legacy macro virus, specifically identified by 'RSN MACRO VIRUS' markers and ClamAV detection as Win.Trojan.Gsis-1. The document body contains text that appears to be part of the macro's payload, including author information and a prohibition against copying or modification, typical of older malware. The presence of WordBasic macro virus markers strongly suggests the use of Visual Basic for macro execution, likely intended to deliver a malicious payload upon enabling macros.

Heuristics 2

  • ClamAV: Win.Trojan.Gsis-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Gsis-1
  • 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.

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