Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f8d998edba8ef8e2…

MALICIOUS

Office (OLE)

7.0 KB First seen: 2015-10-13
MD5: ec1c76605a7acc88d70bb8b934fd5720 SHA-1: 35d2318b5e9dbb64f26af686ddeccd01ed2dbf8c SHA-256: f8d998edba8ef8e2ea723f5f032ab201b5217947799fde4763a32a2cba0899c0
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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