Malicious RTF — malware analysis report

Static analysis result for SHA-256 8b8f474f60f5ad7d…

MALICIOUS

RTF

54.7 KB
MD5: 47b88208fc43d1b1cc342354d5890a39 SHA-1: b78529abf9400d6af95bf9a81e96853ba30d41e8 SHA-256: 8b8f474f60f5ad7d042bcd9c5cc75a78b09c9966545fc21ea927730b3e068093
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1071.001 Web Protocols

The RTF file contains embedded PHP source code for an IRC bot, identified by the 'RTF_PHP_IRC_BOT_SOURCE' heuristic. The script is configured to connect to IRC channels and appears to download further payloads or commands from various URLs, such as 'http://pakmin.yourfreehosting.net/perkakas/cmd.txt'. The presence of 'SE_LOLBIN_RUN_COMMAND' suggests the bot may also execute commands on the host system. The overall intent is to establish a remote-controlled backdoor on a compromised web server.

Heuristics 3

  • PHP IRC bot source embedded in RTF high RTF_PHP_IRC_BOT_SOURCE
    RTF document contains PHP source code with IRC socket connection logic, IRC protocol commands, and bot-control indicators. The RTF is acting as a wrapper for bot source rather than an exploit that executes when opened.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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://pakmin.yourfreehosting.net/perkakas/cmd.txt
    • http://uaedesign.com/config/idfx.txt
    • http://legalref.ru/cyberz/logs/fxscanlogger.php
    • http://brojolelle.org/bnc/cerewet.txt
    • http://legalref.ru/cyberz/installpsy.txt
    • http://legalref.ru/cyberz/logs/target.txt
    • http://localhost/toolz/id.txt
    • http://localhost/toolz/fxscanlogger.php
    • http://localhost/toolz/uploadshell.txt
    • http://localhost/toolz/installpsy.txt
    • http://localhost/toolz/target.txt
    • http://h1.ripway.com/bsnet/a.txt
    • http://83.222.131.90/~legitimi/mybase/r57.txt
    • http://politics.wwf.gr/help/css/faq.txt
    • http://galee/preman/r57/shell

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