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Windows Analysis Report


General Information

Sample Name:server.exe
Analysis ID:827096


Range:0 - 100


Multi AV Scanner detection for submitted file
Detected unpacking (changes PE section rights)
Malicious sample detected (through community Yara rule)
Detected unpacking (overwrites its own PE header)
Yara detected Ursnif
Found evasive API chain (may stop execution after checking system information)
Writes or reads registry keys via WMI
Writes registry values via WMI
Found API chain indicative of debugger detection
Machine Learning detection for sample
Uses 32bit PE files
Yara signature match
Antivirus or Machine Learning detection for unpacked file
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Uses a known web browser user agent for HTTP communication
Contains functionality to call native functions
Tries to resolve domain names, but no domain seems valid (expired dropper behavior)
Contains functionality to dynamically determine API calls


  • System is w10x64
  • server.exe (PID: 5284 cmdline: C:\Users\user\Desktop\server.exe MD5: D966642AAC4F23E0EC3CB978B949FD9D)
  • cleanup
NameDescriptionAttributionBlogpost URLsLink
Gozi, Ursnif2000 Ursnif aka Snifula2006 Gozi v1.0, Gozi CRM, CRM, Papras2010 Gozi v2.0, Gozi ISFB, ISFB, Pandemyia(*)-> 2010 Gozi Prinimalka -> Vawtrak/NeverquestIn 2006, Gozi v1.0 ('Gozi CRM' aka 'CRM') aka Papras was first observed.It was offered as a CaaS, known as 76Service. This first version of Gozi was developed by Nikita Kurmin, and he borrowed code from Ursnif aka Snifula, a spyware developed by Alexey Ivanov around 2000, and some other kits. Gozi v1.0 thus had a formgrabber module and often is classified as Ursnif aka Snifula.In September 2010, the source code of a particular Gozi CRM dll version was leaked, which led to Vawtrak/Neverquest (in combination with Pony) via Gozi Prinimalka (a slightly modified Gozi v1.0) and Gozi v2.0 (aka 'Gozi ISFB' aka 'ISFB' aka Pandemyia). This version came with a webinject module.No Attributionhttps://malpedia.caad.fkie.fraunhofer.de/details/win.gozi
{"RSA Public Key": "ScCitKVnthsrIejolA7zuBWvwII2di/DH3GlyTtkQAl5+NYn11P8hoApgIAx8QgiEaRicK3ETZq3j2ua44XjJevEH0XzzTqZAT3wkYswDxrBkgZMCwo6YXkhXitvoh3eARDtRDEkQsoLHZ9GnSskgPPZhcXZcW5DEVGUxmtbXgDaTXEEASp94TxsSTq8LcHFcoUD/3qCUIKISKD7sIV0hgpJQ8kx5Fr/zREoX54YDyuxKi/xJ3SBIavWF9UPU+YwvxpBDYMFrMsKJrjGUlpoQZehisJjttb1cTtggelEGnFr5O2GXefQUuwrSizDeVnMRSAHdds+AiqlPxEl1nFzSfnHhHtw7Ql8JtPTws7Z1Ho=", "c2_domain": ["checklist.skype.com", "", "", "", ""], "botnet": "7714", "server": "50", "serpent_key": "lk8hY4nisKQzZKXE", "sleep_time": "1", "CONF_TIMEOUT": "20", "SetWaitableTimer_value": "0"}
  • 0x6af3:$a: 55 8B EC 8B 45 14 56 57 8B 7D 08 33 F6 89 47 0C 39 75 10 76 15 8B
00000000.00000003.475989418.00000000053D8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
    • 0x1228:$a1: /C ping localhost -n %u && del "%s"
    • 0xea8:$a2: /C "copy "%s" "%s" /y && "%s" "%s"
    • 0xf00:$a3: /C "copy "%s" "%s" /y && rundll32 "%s",%S"
    • 0xa9c:$a5: filename="%.4u.%lu"
    • 0x63a:$a7: version=%u&soft=%u&user=%08x%08x%08x%08x&server=%u&id=%u&type=%u&name=%s
    • 0x876:$a8: %08X-%04X-%04X-%04X-%08X%04X
    • 0xbb7:$a8: %08X-%04X-%04X-%04X-%08X%04X
    • 0xe6d:$a9: &whoami=%s
    • 0xe56:$a10: %u.%u_%u_%u_x%u
    • 0xd63:$a11: size=%u&hash=0x%08x
    • 0xb1d:$a12: &uptime=%u
    • 0x6fb:$a13: %systemroot%\system32\c_1252.nls
    • 0x1298:$a14: IE10RunOnceLastShown_TIMESTAMP
    • 0xb54:$a1: soft=%u&version=%u&user=%08x%08x%08x%08x&server=%u&id=%u&crc=%x
    • 0x63a:$a2: version=%u&soft=%u&user=%08x%08x%08x%08x&server=%u&id=%u&type=%u&name=%s
    • 0xa68:$a3: Content-Disposition: form-data; name="upload_file"; filename="%.4u.%lu"
    • 0xcf2:$a5: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT %u.%u%s)
    • 0xd96:$a9: Software\AppDataLow\Software\Microsoft\
    • 0x1ca0:$a9: Software\AppDataLow\Software\Microsoft\
    00000000.00000003.476024280.00000000053D8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security