Win.Trojan.PonyStealer-9831667-0 — RTF malware analysis

Static analysis result for SHA-256 451f4de971a52663…

MALICIOUS

RTF

561.3 KB First seen: 2019-05-31
MD5: 1fade6514157bcadd76da884de1a5fa8 SHA-1: bb0386459fd72409dcd6f56351c773b8ef6c43ae SHA-256: 451f4de971a52663da15b07f1b98bfd164dec2824b81e6fb633f9fac2aabe7c8
320 Risk Score

Malware Insights

Win.Trojan.PonyStealer-9831667-0 · confidence 95%

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains OLE object data and triggers heuristics related to CVE-2017-8570, indicating it exploits this vulnerability. ClamAV identifies the file as Win.Trojan.PonyStealer-9831667-0, suggesting its purpose is to steal information. The embedded artifacts, particularly objdata_04_off00025124.bin, are flagged as suspicious and likely contain the stealer payload.

Heuristics 6

  • Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE related CVE_2017_8570
    RTF \objdata decodes to OLE data containing the Composite Moniker — CVE-2017-8570 (drops SCT script) 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.
  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • ClamAV: Win.Trojan.Dnyq-7541017-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Dnyq-7541017-0
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • Suspicious extracted artifact high 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.
  • OLE object data medium RTF_OBJDATA
    RTF contains 5 \objdata section(s) — embedded OLE objects

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000144f6.bin rtf-objdata-decoded RTF \objdata at offset 0x144F6 240118 bytes
SHA-256: a8e312b33f5d2370da45aef80f11b1f4b30c2c83ea88199de21e1d2142159d95
Detection
ClamAV: Win.Trojan.Dnyq-7541017-0
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.
objdata_01_off00089923.bin rtf-objdata-decoded RTF \objdata at offset 0x89923 444 bytes
SHA-256: 9a92e9b52588416922da9ff504d0e13de10f7c9209a209170102cf83da970296
objdata_02_off00089cd2.bin rtf-objdata-decoded RTF \objdata at offset 0x89CD2 1245 bytes
SHA-256: 2703dc2ca3c0d9e8edd5a157bc15cef46ae50607824244b9311f26196efc1de5
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered command string(s): cscript //nologo %vbs%
objdata_03_off0008a6c2.bin rtf-objdata-decoded RTF \objdata at offset 0x8A6C2 1172 bytes
SHA-256: 7016d6830c81a40d827e77fc7a4150d18c42502731bb58bff38de19ab47218d2
objdata_04_off0008b059.bin rtf-objdata-decoded RTF \objdata at offset 0x8B059 2633 bytes
SHA-256: c652d237d34511cfc2908b6727831912f33e6dd1c0a558d188cd3c8467dd6026

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