Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
server_(3).exe

Overview

General Information

Sample Name:server_(3).exe
Analysis ID:830450
MD5:aa37b36ea7ba39b6c00ae1b01bada3f7
SHA1:90545746e5b23fcdf7db1fa5c30588df2f4c31bf
SHA256:a6886a3566a1a98072d67f1aca4a04b5667f97f4df21b2f54d6108293d7c02b7
Tags:agenziaentrateexegoziisfbITAmefmiseursnif
Infos:

Detection

Ursnif
Score:100
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Detected unpacking (overwrites its own PE header)
Yara detected Ursnif
Detected unpacking (changes PE section rights)
Snort IDS alert for network traffic
Writes or reads registry keys via WMI
Found API chain indicative of debugger detection
Machine Learning detection for sample
Found evasive API chain (may stop execution after checking system information)
Writes registry values via WMI
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)
Uses code obfuscation techniques (call, push, ret)
PE file contains sections with non-standard names
Internet Provider seen in connection with other malware
Detected potential crypto function
Contains functionality to query CPU information (cpuid)
Contains functionality to call native functions
Contains functionality to dynamically determine API calls
Contains functionality to read the PEB
Uses a known web browser user agent for HTTP communication
Found evasive API chain checking for process token information
Tries to resolve domain names, but no domain seems valid (expired dropper behavior)
Uses Microsoft's Enhanced Cryptographic Provider

Classification

Process Tree

  • System is w10x64
  • server_(3).exe (PID: 1236 cmdline: C:\Users\user\Desktop\server_(3).exe MD5: AA37B36EA7BA39B6C00AE1B01BADA3F7)
  • cleanup

Malware Threat Intel

Provided by

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

Malware Configuration

Threatname: Ursnif

{"RSA Public Key": "ScCjtIu/chsReaToemavuPsGfYIczuvCBclhySG8/AhfUJMnvau4hmaBPIAXScUh9/secJMcCpqd5yeayd2fJdEc3ETZJfeY55SskXGIyxmn6sJL8WH2YF95GitV+tnd52epRBd8/snxdFtGg4Pgf9kxQsW/ySpD96hQxlGzGgDApS0E54E54SLEBTqihX3FWN2//mDaDIJuoFz7lt0whvCg/8gXPBf/s2nkXoRwyyqXguvwDcw9IZEu1NT1qqIwpXL9DGldaMvwfXTGOLIkQX35RsJJDpP1V5Mcgc+c1nBRPKqGQz+NUtKDBiyp0RXMK3jDdMGWvimLl80kvMkvSd8fQXtWRcZ7DCuQwrQxkXo=", "c2_domain": ["checklist.skype.com", "62.173.142.81", "193.233.175.113", "109.248.11.184", "212.109.218.26", "185.68.93.7"], "botnet": "7715", "server": "50", "serpent_key": "xeaLJj1BwSDpjIfH", "sleep_time": "1", "CONF_TIMEOUT": "20", "SetWaitableTimer_value": "0"}

Yara Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000000.00000003.514574237.0000000002BC8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
    00000000.00000003.514574237.0000000002BC8000.00000004.00000020.00020000.00000000.sdmpWindows_Trojan_Gozi_fd494041unknownunknown
    • 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:$a14: IE10RunOnceLastShown_TIMESTAMP
    00000000.00000003.514574237.0000000002BC8000.00000004.00000020.00020000.00000000.sdmpWindows_Trojan_Gozi_261f5ac5unknownunknown
    • 0xb54:$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\
    • 0x1cc0:$a9: Software\AppDataLow\Software\Microsoft\
    00000000.00000003.514378176.0000000002BC8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
      00000000.00000003.514378176.0000000002BC8000.00000004.00000020.00020000.00000000.sdmpWindows_Trojan_Gozi_fd494041unknownunknown
      • 0x1228:$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
      Click to see the 27 entries

      Sigma Signatures

      ⊘No Sigma rule has matched

      Snort Signatures

      Timestamp:192.168.2.462.173.142.8149695802033204 03/20/23-11:48:17.902010
      SID:2033204
      Source Port:49695
      Destination Port:80
      Protocol:TCP
      Classtype:A Network Trojan was detected
      Timestamp:192.168.2.462.173.142.8149695802033203 03/20/23-11:48:17.902010
      SID:2033203
      Source Port:49695
      Destination Port:80
      Protocol:TCP
      Classtype:A Network Trojan was detected

      Joe Sandbox Signatures

      Click to jump to signature section

      Show All Signature Results

      AV Detection

      barindex
      Multi AV Scanner detection for submitted file
      Source: server_(3).exeReversingLabs: Detection: 38%
      Source: server_(3).exeVirustotal: Detection: 37%Perma Link
      Machine Learning detection for sample
      Source: server_(3).exeJoe Sandbox ML: detected
      Source: 0.2.server_(3).exe.400000.0.unpackAvira: Label: TR/Crypt.XPACK.Gen7