Joe Sandbox Cloud Basic Analysis Report

Loading Joe Sandbox Report ...

Edit tour

Windows Analysis Report
server.exe

Overview

General Information

Sample Name:server.exe
Analysis ID:830657
MD5:386839452984e2eda4151746d57ea19b
SHA1:b9c43085f6b63db8a02b4764c4d75699efa9d074
SHA256:f139bc8f71a483ba058e2577ef5952b85a74cebd302632a121e4bbc0d96bb953
Tags:agenziaentrateexegoziisfbmefmiseursnif
Infos:

Detection

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

Signatures

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)
Snort IDS alert for network traffic
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)
Uses a known web browser user agent for HTTP communication
PE file contains sections with non-standard names
Internet Provider seen in connection with other malware
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

Classification

Process Tree

  • System is w10x64
  • server.exe (PID: 5776 cmdline: C:\Users\user\Desktop\server.exe MD5: 386839452984E2EDA4151746D57EA19B)
  • 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
00000000.00000002.571809777.0000000000620000.00000040.00001000.00020000.00000000.sdmpWindows_Trojan_Smokeloader_3687686funknownunknown
  • 0x30d:$a: 0C 8B 45 F0 89 45 C8 8B 45 C8 8B 40 3C 8B 4D F0 8D 44 01 04 89
00000000.00000002.572096214.0000000002F48000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
    00000000.00000002.572096214.0000000002F48000.00000004.00000020.00020000.00000000.sdmpWindows_Trojan_Gozi_fd494041unknownunknown
    • 0x1228:$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
    00000000.00000002.572096214.0000000002F48000.00000004.00000020.00020000.00000000.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\
    00000000.00000003.455206997.0000000002F48000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
      Click to see the 27 entries

      Sigma Signatures

      ⊘No Sigma rule has matched

      Snort Signatures

      Timestamp:192.168.2.562.173.142.8149698802033204 03/20/23-15:27:43.098931
      SID:2033204
      Source Port:49698
      Destination Port:80
      Protocol:TCP
      Classtype:A Network Trojan was detected
      Timestamp:192.168.2.562.173.142.8149698802033203 03/20/23-15:27:43.098931
      SID:2033203
      Source Port:49698
      Destination Port:80
      Protocol:TCP
      Classtype:A Network Trojan was detected
      Timestamp:192.168.2.5193.233.175.11349699802033204 03/20/23-15:28:03.313332
      SID:2033204
      Source Port:49699
      Destination Port:80
      Protocol:TCP
      Classtype:A Network Trojan was detected
      Timestamp:192.168.2.5193.233.175.11349699802033203 03/20/23-15:28:03.313332
      SID:2033203
      Source Port:49699
      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.exeReversingLabs: Detection: 33%
      Machine Learning detection for sample
      Source: server.exeJoe Sandbox ML: detected
      Source: 0.2.server.exe.400000.0.unpackAvira: Label: TR/Crypt.XPACK.Gen7
      Source: 00000000.00000002.572025264.0000000002829000.00000004.00000020.00020000.00000000.sdmpMalware Configuration Extractor: 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"}

      Compliance

      barindex
      Detected unpacking (overwrites its own PE header)
      Source: C:\Users\user\Desktop\server.exeUnpacked PE file: 0.2.server.exe.400000.0.unpack
      Source: server.exeStatic PE information: RELOCS_STRIPPED, EXECUTABLE_IMAGE, 32BIT_MACHINE
      Source: C:\Users\user\Desktop\server.exeFile opened: C:\Windows\SysWOW64\msvcr100.dllJump to behavior

      Networking

      bar