Malicious RTF — malware analysis report

Static analysis result for SHA-256 2bccdd9526928531…

MALICIOUS

RTF

51.9 KB Created: 2016-08-26 12:10:00 First seen: 2016-09-21
MD5: bd08dc50112ae7797ae556789299b7a9 SHA-1: 57c2468f0abbb4e8a07d7a20915b8c88ce64cc2a SHA-256: 2bccdd9526928531c57bc00ab6357bfc531e55e786cfe1463b5c08e5ffe210be
82 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an OLE object that triggers the CVE-2012-0158 vulnerability. This vulnerability is known to be exploited for client execution. The embedded object contains shellcode and an extracted file, suggesting it's used to download and execute a second-stage payload from the URL http://158.69.52.6/~signaturehealthc/images/mamy.exe.

Heuristics 4

  • MSCOMCTL.ListView — CVE-2012-0158 high CVE related CVE_2012_0158
    RTF \objdata decodes to OLE data containing the MSCOMCTL.ListView — CVE-2012-0158 CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://158.69.52.6/~signaturehealthc/images/mamy.exe In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00006c3e.bin rtf-objdata-decoded RTF \objdata at offset 0x6C3E 10924 bytes
SHA-256: d33f06df06f96c40497316d875afba7d7b2f49918c082d37c2d93365b53fe4aa
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS