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Windows Analysis Report mzyDSLb1u9.exe

Overview

General Information

Sample Name:mzyDSLb1u9.exe
Analysis ID:452311
MD5:922bbf421cd0c9b155f45388db7c8718
SHA1:993cd3bc36c7d903846cf9ee4fb1e8e01dec4947
SHA256:1bf63394fcf232d3a303d17df87252e2f47c43205edadc99ed15a50c9e193ebc
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
Yara detected AntiVM autoit script
Yara detected Nanocore RAT
.NET source code contains potential unpacker
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Drops PE files with a suspicious file extension
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Protects its processes via BreakOnTermination flag
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Antivirus or Machine Learning detection for unpacked file
Contains functionality for read data from the clipboard
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to block mouse and keyboard input (often used to hinder debugging)
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to check if a window is minimized (may be used to check if an application is visible)
Contains functionality to communicate with device drivers
Contains functionality to dynamically determine API calls
Contains functionality to execute programs as a different user
Contains functionality to launch a process as a different user
Contains functionality to launch a program with higher privileges
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Contains functionality to query CPU information (cpuid)
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Contains functionality to read the clipboard data
Contains functionality to retrieve information about pressed keystrokes
Contains functionality to shutdown / reboot the system
Contains functionality to simulate keystroke presses
Contains functionality to simulate mouse events
Contains functionality which may be used to detect a debugger (GetProcessHeap)
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
File is packed with WinRar
Found WSH timer for Javascript or VBS script (likely evasive script)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found potential string decryption / allocating functions
Installs a raw input device (often for capturing keystrokes)
May sleep (evasive loops) to hinder dynamic analysis
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
OS version to string mapping found (often used in BOTs)
PE file contains strange resources
Potential key logger detected (key state polling based)
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
Tries to load missing DLLs
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Yara signature match

Classification

Process Tree

  • System is w10x64
  • mzyDSLb1u9.exe (PID: 6848 cmdline: 'C:\Users\user\Desktop\mzyDSLb1u9.exe' MD5: 922BBF421CD0C9B155F45388DB7C8718)
    • mssvgt.pif (PID: 7104 cmdline: 'C:\Users\user\AppData\Local\Temp\42926996\mssvgt.pif' nlcno.gge MD5: 7C81E999E91D1D0F772010DFA4C34923)
      • RegSvcs.exe (PID: 4476 cmdline: C:\Users\user\AppData\Local\Temp\RegSvcs.exe MD5: 2867A3817C9245F7CF518524DFD18F28)
        • schtasks.exe (PID: 5768 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor' /xml 'C:\Users\user\AppData\Local\Temp\tmpD629.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
          • conhost.exe (PID: 5748 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
        • schtasks.exe (PID: 6760 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor Task' /xml 'C:\Users\user\AppData\Local\Temp\tmpDA12.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
          • conhost.exe (PID: 6452 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • mssvgt.pif (PID: 984 cmdline: 'C:\Users\user\AppData\Local\Temp\42926996\mssvgt.pif' C:\Users\user\AppData\Local\Temp\42926996\nlcno.gge MD5: 7C81E999E91D1D0F772010DFA4C34923)
    • RegSvcs.exe (PID: 6744 cmdline: C:\Users\user\AppData\Local\Temp\RegSvcs.exe MD5: 2867A3817C9245F7CF518524DFD18F28)
  • RegSvcs.exe (PID: 768 cmdline: C:\Users\user\AppData\Local\Temp\RegSvcs.exe 0 MD5: 2867A3817C9245F7CF518524DFD18F28)
    • conhost.exe (PID: 4864 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • dhcpmon.exe (PID: 6576 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 0 MD5: 2867A3817C9245F7CF518524DFD18F28)
    • conhost.exe (PID: 6500 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • wscript.exe (PID: 6996 cmdline: 'C:\Windows\System32\WScript.exe' 'C:\Users\user\AppData\Local\Temp\42926996\Update.vbs' MD5: 9A68ADD12EB50DDE7586782C3EB9FF9C)
  • dhcpmon.exe (PID: 7048 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' MD5: 2867A3817C9245F7CF518524DFD18F28)
    • conhost.exe (PID: 6160 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "1.2.2.0", "Mutex": "ba2baad0-dd3f-4844-a1e3-4d042f9a", "Group": "HOBBIT", "Domain1": "strongodss.ddns.net", "Domain2": "185.19.85.175", "Port": 48562, "KeyboardLogging": "Enable", "RunOnStartup": "Enable", "RequestElevation": "Disable", "BypassUAC": "Enable", "ClearZoneIdentifier": "Enable", "ClearAccessControl": "Enable", "SetCriticalProcess": "Enable", "PreventSystemSleep": "Enable", "ActivateAwayMode": "Enable", "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
00000004.00000003.662507687.00000000044F5000.00000004.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0xf99d:$x1: NanoCore.ClientPluginHost
  • 0xf9da:$x2: IClientNetworkHost
  • 0x1350d:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
00000004.00000003.662507687.00000000044F5000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    00000004.00000003.662507687.00000000044F5000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0xf705:$a: NanoCore
    • 0xf715:$a: NanoCore
    • 0xf949:$a: NanoCore
    • 0xf95d:$a: NanoCore
    • 0xf99d:$a: NanoCore
    • 0xf764:$b: ClientPlugin
    • 0xf966:$b: ClientPlugin
    • 0xf9a6:$b: ClientPlugin
    • 0xf88b:$c: ProjectData
    • 0x10292:$d: DESCrypto
    • 0x17c5e:$e: KeepAlive
    • 0x15c4c:$g: LogClientMessage
    • 0x11e47:$i: get_Connected
    • 0x105c8:$j: #=q
    • 0x105f8:$j: #=q
    • 0x10614:$j: #=q
    • 0x10644:$j: #=q
    • 0x10660:$j: #=q
    • 0x1067c:$j: #=q
    • 0x106ac:$j: #=q
    • 0x106c8:$j: #=q
    0000000A.00000003.692566467.0000000003D51000.00000004.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0xf1d5:$x1: NanoCore.ClientPluginHost
    • 0xf212:$x2: IClientNetworkHost
    • 0x12d45:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    0000000A.00000003.692566467.0000000003D51000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      Click to see the 136 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      6.2.RegSvcs.exe.5740000.9.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xe75:$x1: NanoCore.ClientPluginHost
      • 0xe8f:$x2: IClientNetworkHost
      6.2.RegSvcs.exe.5740000.9.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xe75:$x2: NanoCore.ClientPluginHost
      • 0x1261:$s3: PipeExists
      • 0x1136:$s4: PipeCreated
      • 0xeb0:$s5: IClientLoggingHost
      6.2.RegSvcs.exe.5750000.10.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0x1646:$x1: NanoCore.ClientPluginHost
      6.2.RegSvcs.exe.5750000.10.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0x1646:$x2: NanoCore.ClientPluginHost
      • 0x1724:$s4: PipeCreated
      • 0x1660:$s5: IClientLoggingHost
      6.2.RegSvcs.exe.3cbb041.4.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xd9ad:$x1: NanoCore.ClientPluginHost
      • 0xd9da:$x2: IClientNetworkHost