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Analysis Report cd61fe0ebfe9f6326cd5a4df9747e72c.exe

Overview

General Information

Sample Name:cd61fe0ebfe9f6326cd5a4df9747e72c.exe
Analysis ID:402423
MD5:cafe59d79e00e211548d5e569931e70e
SHA1:d7fbfd97e93dec7490ef06c24e2d373127ce56eb
SHA256:4b603d683f975207871344aa9790ac649bd15c98cceecf626b92a1d3d8fd85f4
Tags:exeNanoCoreRAT
Infos:

Most interesting Screenshot:

Detection

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

Signatures

Detected Nanocore Rat
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Yara detected AntiVM3
Yara detected Nanocore RAT
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Antivirus or Machine Learning detection for unpacked file
Contains capabilities to detect virtual machines
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Drops PE files
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
IP address seen in connection with other malware
Installs a raw input device (often for capturing keystrokes)
Internet Provider seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Yara signature match

Classification

Startup

  • System is w10x64
  • cd61fe0ebfe9f6326cd5a4df9747e72c.exe (PID: 5644 cmdline: 'C:\Users\user\Desktop\cd61fe0ebfe9f6326cd5a4df9747e72c.exe' MD5: CAFE59D79E00E211548D5E569931E70E)
    • cd61fe0ebfe9f6326cd5a4df9747e72c.exe (PID: 2160 cmdline: {path} MD5: CAFE59D79E00E211548D5E569931E70E)
      • schtasks.exe (PID: 5828 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor' /xml 'C:\Users\user\AppData\Local\Temp\tmp8193.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 5772 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 5868 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor Task' /xml 'C:\Users\user\AppData\Local\Temp\tmp84B1.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 5872 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • dhcpmon.exe (PID: 3156 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 0 MD5: CAFE59D79E00E211548D5E569931E70E)
    • dhcpmon.exe (PID: 5844 cmdline: {path} MD5: CAFE59D79E00E211548D5E569931E70E)
    • dhcpmon.exe (PID: 5064 cmdline: {path} MD5: CAFE59D79E00E211548D5E569931E70E)
  • dhcpmon.exe (PID: 6124 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' MD5: CAFE59D79E00E211548D5E569931E70E)
    • dhcpmon.exe (PID: 3468 cmdline: {path} MD5: CAFE59D79E00E211548D5E569931E70E)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "1.2.2.0", "Mutex": "25d2fcba-c6f2-4766-acfe-f43fa2f1", "Group": "saviour", "Domain1": "cloudhost.myfirewall.org", "Domain2": "cloudhost.myfirewall.org", "Port": 5456, "KeyboardLogging": "Enable", "RunOnStartup": "Enable", "RequestElevation": "Disable", "BypassUAC": "Enable", "ClearZoneIdentifier": "Enable", "ClearAccessControl": "Disable", "SetCriticalProcess": "Disable", "PreventSystemSleep": "Enable", "ActivateAwayMode": "Disable", "EnableDebugMode": "Disable", "RunDelay": 0, "ConnectDelay": 4000, "RestartDelay": 5000, "TimeoutInterval": 5000, "KeepAliveTimeout": 30000, "MutexTimeout": 5000, "LanTimeout": 2500, "WanTimeout": 8000, "BufferSize": "ffff0000", "MaxPacketSize": "0000a000", "GCThreshold": "0000a000", "UseCustomDNS": "Enable", "PrimaryDNSServer": "cloudhost.myfirewall.org", "BackupDNSServer": "cloudhost.myfirewall.org", "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
0000000A.00000002.292598003.0000000002A21000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    00000001.00000002.489985311.0000000005940000.00000004.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0xe75:$x1: NanoCore.ClientPluginHost
    • 0xe8f:$x2: IClientNetworkHost
    00000001.00000002.489985311.0000000005940000.00000004.00000001.sdmpNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
    • 0xe75:$x2: NanoCore.ClientPluginHost
    • 0x1261:$s3: PipeExists
    • 0x1136:$s4: PipeCreated
    • 0xeb0:$s5: IClientLoggingHost
    0000000E.00000002.305109543.0000000000402000.00000040.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0xff8d:$x1: NanoCore.ClientPluginHost
    • 0xffca:$x2: IClientNetworkHost
    • 0x13afd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    0000000E.00000002.305109543.0000000000402000.00000040.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      Click to see the 67 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      14.2.dhcpmon.exe.2fbec20.2.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xe75:$x1: NanoCore.ClientPluginHost
      • 0xe8f:$x2: IClientNetworkHost
      14.2.dhcpmon.exe.2fbec20.2.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xe75:$x2: NanoCore.ClientPluginHost
      • 0x1261:$s3: PipeExists
      • 0x1136:$s4: PipeCreated
      • 0xeb0:$s5: IClientLoggingHost
      12.2.dhcpmon.exe.42205dc.5.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xd9ad:$x1: NanoCore.ClientPluginHost
      • 0xd9da:$x2: IClientNetworkHost
      12.2.dhcpmon.exe.42205dc.5.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xd9ad:$x2: NanoCore.ClientPluginHost
      • 0xea88:$s4: PipeCreated
      • 0xd9c7:$s5: IClientLoggingHost
      12.2.dhcpmon.exe.42205dc.5.unpackJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
        Click to see the 124 entries

        Sigma Overview

        System Summary: