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Windows Analysis Report purchase order Nl32855 (1).exe

Overview

General Information

Sample Name:purchase order Nl32855 (1).exe
Analysis ID:526200
MD5:c466151570c893f56d548a9689155656
SHA1:3e779ff5c71f319fc2d3bd4fc577c4769873c47c
SHA256:dee5267af261b8e291b83b01b12c4149204b20754cd1714bd974ae1dae447a44
Tags:exeNanoCoreRAT
Infos:

Most interesting Screenshot:

Detection

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

Signatures

Found malware configuration
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Malicious sample detected (through community Yara rule)
Sigma detected: NanoCore
Yara detected AntiVM3
Detected Nanocore Rat
Multi AV Scanner detection for dropped file
Yara detected Nanocore RAT
Initial sample is a PE file and has a suspicious name
Connects to many ports of the same IP (likely port scanning)
Protects its processes via BreakOnTermination flag
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Sigma detected: Suspicius Add Task From User AppData Temp
Machine Learning detection for sample
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
C2 URLs / IPs found in malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Uses schtasks.exe or at.exe to add and modify task schedules
Uses dynamic DNS services
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
Antivirus or Machine Learning detection for unpacked file
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Internet Provider seen in connection with other malware
Detected potential crypto function
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to call native functions
PE file contains executable resources (Code or Archives)
Contains long sleeps (>= 3 min)
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found inlined nop instructions (likely shell or obfuscated code)
Installs a raw input device (often for capturing keystrokes)
Sample file is different than original file name gathered from version info
Drops PE files
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Detected TCP or UDP traffic on non-standard ports
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Creates a process in suspended mode (likely to inject code)

Classification

Process Tree

  • System is w10x64
  • purchase order Nl32855 (1).exe (PID: 6824 cmdline: "C:\Users\user\Desktop\purchase order Nl32855 (1).exe" MD5: C466151570C893F56D548A9689155656)
    • schtasks.exe (PID: 5936 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\qZEskWcTYJLciB" /XML "C:\Users\user\AppData\Local\Temp\tmpB6B0.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 1328 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • purchase order Nl32855 (1).exe (PID: 1668 cmdline: {path} MD5: C466151570C893F56D548A9689155656)
      • schtasks.exe (PID: 3396 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor" /xml "C:\Users\user\AppData\Local\Temp\tmp1F1D.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 5732 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 3296 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor Task" /xml "C:\Users\user\AppData\Local\Temp\tmp2A39.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 5648 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • purchase order Nl32855 (1).exe (PID: 4864 cmdline: "C:\Users\user\Desktop\purchase order Nl32855 (1).exe" 0 MD5: C466151570C893F56D548A9689155656)
    • schtasks.exe (PID: 6764 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\qZEskWcTYJLciB" /XML "C:\Users\user\AppData\Local\Temp\tmpE496.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 7028 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • dhcpmon.exe (PID: 6700 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" 0 MD5: C466151570C893F56D548A9689155656)
    • schtasks.exe (PID: 7044 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\qZEskWcTYJLciB" /XML "C:\Users\user\AppData\Local\Temp\tmpF1A6.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 4592 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • dhcpmon.exe (PID: 6252 cmdline: {path} MD5: C466151570C893F56D548A9689155656)
  • dhcpmon.exe (PID: 7084 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" MD5: C466151570C893F56D548A9689155656)
    • schtasks.exe (PID: 6864 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\qZEskWcTYJLciB" /XML "C:\Users\user\AppData\Local\Temp\tmpD.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 7152 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • dhcpmon.exe (PID: 5820 cmdline: {path} MD5: C466151570C893F56D548A9689155656)
    • dhcpmon.exe (PID: 2044 cmdline: {path} MD5: C466151570C893F56D548A9689155656)
    • dhcpmon.exe (PID: 5984 cmdline: {path} MD5: C466151570C893F56D548A9689155656)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "1.2.2.0", "Mutex": "6c7be0fb-d973-4d3c-b342-92a2df7c", "Group": "Wiz", "Domain1": "lizaelock.ddns.net", "Domain2": "", "Port": 52149, "KeyboardLogging": "Enable", "RunOnStartup": "Enable", "RequestElevation": "Disable", "BypassUAC": "Enable", "ClearZoneIdentifier": "Enable", "ClearAccessControl": "Enable", "SetCriticalProcess": "Enable", "PreventSystemSleep": "Enable", "ActivateAwayMode": "Disable", "EnableDebugMode": "Disable", "RunDelay": 0, "ConnectDelay": 4000, "RestartDelay": 5000, "TimeoutInterval": 5000, "KeepAliveTimeout": 30000, "MutexTimeout": 5000, "LanTimeout": 2500, "WanTimeout": 8009, "BufferSize": "02000100", "MaxPacketSize": "", "GCThreshold": "", "BypassUserAccountControlData": "<?xml version=\"1.0\" encoding=\"UTF-16\"?>\r\n<Task version=\"1.2\" xmlns=\"http://schemas.microsoft.com/windows/2004/02/mit/task\">\r\n  <RegistrationInfo />\r\n  <Triggers />\r\n  <Principals>\r\n    <Principal id=\"Author\">\r\n      <LogonType>InteractiveToken</LogonType>\r\n      <RunLevel>HighestAvailable</RunLevel>\r\n    </Principal>\r\n  </Principals>\r\n  <Settings>\r\n    <MultipleInstancesPolicy>Parallel</MultipleInstancesPolicy>\r\n    <DisallowStartIfOnBatteries>false</DisallowStartIfOnBatteries>\r\n    <StopIfGoingOnBatteries>false</StopIfGoingOnBatteries>\r\n    <AllowHardTerminate>true</AllowHardTerminate>\r\n    <StartWhenAvailable>false</StartWhenAvailable>\r\n    <RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>\r\n    <IdleSettings>\r\n      <StopOnIdleEnd>false</StopOnIdleEnd>\r\n      <RestartOnIdle>false</RestartOnIdle>\r\n    </IdleSettings>\r\n    <AllowStartOnDemand>true</AllowStartOnDemand>\r\n    <Enabled>true</Enabled>\r\n    <Hidden>false</Hidden>\r\n    <RunOnlyIfIdle>false</RunOnlyIfIdle>\r\n    <WakeToRun>false</WakeToRun>\r\n    <ExecutionTimeLimit>PT0S</ExecutionTimeLimit>\r\n    <Priority>4</Priority>\r\n  </Settings>\r\n  <Actions Context=\"Author\">\r\n    <Exec>\r\n      <Command>\"#EXECUTABLEPATH\"</Command>\r\n      <Arguments>$(Arg0)</Arguments>\r\n    </Exec>\r\n  </Actions>\r\n</Task"}

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000007.00000002.922693720.0000000006000000.00000004.00020000.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0xf7ad:$x1: NanoCore.ClientPluginHost
  • 0xf7da:$x2: IClientNetworkHost
00000007.00000002.922693720.0000000006000000.00000004.00020000.sdmpNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
  • 0xf7ad:$x2: NanoCore.ClientPluginHost
  • 0x10888:$s4: PipeCreated
  • 0xf7c7:$s5: IClientLoggingHost
00000007.00000002.922693720.0000000006000000.00000004.00020000.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    00000010.00000000.700142323.0000000000402000.00000040.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0xff8d:$x1: NanoCore.ClientPluginHost
    • 0xffca:$x2: IClientNetworkHost
    • 0x13afd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    00000010.00000000.700142323.0000000000402000.00000040.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      Click to see the 115 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      16.2.purchase order Nl32855 (1).exe.434ec86.5.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0x4083:$x1: NanoCore.ClientPluginHost
      16.2.purchase order Nl32855 (1).exe.434ec86.5.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0x4083:$x2: NanoCore.ClientPluginHost
      • 0x4161:$s4: PipeCreated
      • 0x409d:$s5: IClientLoggingHost
      27.2.dhcpmon.exe.4513ac3.6.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0x1646:$x1: NanoCore.ClientPluginHost
      • 0x151e3:$x1: NanoCore.ClientPluginHost
      • 0x2e17a:$x1: NanoCore.ClientPluginHost
      • 0x15210:$x2: IClientNetworkHost
      • 0x2e1a7:$x2: IClientNetworkHost
      27.2.dhcpmon.exe.4513ac3.6.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0x1646:$x2: NanoCore.ClientPluginHost
      • 0x151e3:$x2: NanoCore.ClientPluginHost
      • 0x2e17a:$x2: NanoCore.ClientPluginHost
      • 0x1724:$s4: PipeCreated
      • 0x162be:$s4: PipeCreated
      • 0x2f255:$s4: PipeCreated
      • 0x1660:$s5: IClientLoggingHost
      • 0x151fd:$s5: IClientLoggingHost
      • 0x2e194:$s5: IClientLoggingHost
      27.2.dhcpmon.exe.4513ac3.6.raw.unpackJoeSecurity_NanocoreYara detected Nanocore RATJoe Security