Win.Trojan.PolyPoster-1 — Office (OLE) malware analysis

Static analysis result for SHA-256 cba879f9ecb9b524…

MALICIOUS

Office (OLE)

14.5 KB Created: 1998-04-19 23:09:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14
MD5: 63c2a8f542d84a58e5e0392bd24616e9 SHA-1: e8fc459a09856fb08ce29b40edb64ea5843541b6 SHA-256: cba879f9ecb9b524e9d77a1ce9082bec0484d821ea9c5798b0a9a2d7e6eb4e9a
100 Risk Score

Malware Insights

Win.Trojan.PolyPoster-1 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits characteristics of a legacy WordBasic macro virus, as indicated by the 'OLE_LEGACY_WORDBASIC_MACRO_VIRUS' heuristic. The extracted document body contains obfuscated macro code that appears to check for existing infections and attempts to execute a file named 'agent.exe' from specific directories ('c:\progra~1\agent\' and 'c:\agent\'). This suggests the macro's primary function is to act as a dropper or downloader for a secondary payload.

Heuristics 2

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

Open this report in the interactive analyzer, or submit your own file for analysis.