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Windows Analysis Report
Scancontract103.exe

Overview

General Information

Sample Name:Scancontract103.exe
Analysis ID:713039
MD5:9d2a2b596cd979fc9674824d2aa731df
SHA1:015e8ae0f838e0fba35643297530a5b9a66e4186
SHA256:c4a2c953833c8d6b5d2ef71b997700559ecc9f23573d89072d205f963e46956c
Tags:exeNanoCoreRAT
Infos:

Detection

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

Signatures

Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Sigma detected: NanoCore
Yara detected AntiVM3
Detected Nanocore Rat
Sigma detected: Scheduled temp file as task from temp location
Multi AV Scanner detection for domain / URL
Yara detected Nanocore RAT
Protects its processes via BreakOnTermination flag
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Machine Learning detection for sample
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains very large strings
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 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
IP address seen in connection with other malware
Contains long sleeps (>= 3 min)
Enables debug privileges
Creates a DirectInput object (often for capturing keystrokes)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Installs a raw input device (often for capturing keystrokes)
Sample file is different than original file name gathered from version info
Drops PE files
Detected TCP or UDP traffic on non-standard ports
Creates a process in suspended mode (likely to inject code)

Classification

  • System is w10x64
  • Scancontract103.exe (PID: 3732 cmdline: "C:\Users\user\Desktop\Scancontract103.exe" MD5: 9D2A2B596CD979FC9674824D2AA731DF)
    • Scancontract103.exe (PID: 1760 cmdline: {path} MD5: 9D2A2B596CD979FC9674824D2AA731DF)
      • schtasks.exe (PID: 2636 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor" /xml "C:\Users\user\AppData\Local\Temp\tmpCA7.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 4744 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 2300 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor Task" /xml "C:\Users\user\AppData\Local\Temp\tmp1090.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 5056 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • Scancontract103.exe (PID: 6052 cmdline: C:\Users\user\Desktop\Scancontract103.exe 0 MD5: 9D2A2B596CD979FC9674824D2AA731DF)
  • dhcpmon.exe (PID: 5308 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" 0 MD5: 9D2A2B596CD979FC9674824D2AA731DF)
    • dhcpmon.exe (PID: 4632 cmdline: {path} MD5: 9D2A2B596CD979FC9674824D2AA731DF)
    • dhcpmon.exe (PID: 2576 cmdline: {path} MD5: 9D2A2B596CD979FC9674824D2AA731DF)
  • dhcpmon.exe (PID: 1012 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" MD5: 9D2A2B596CD979FC9674824D2AA731DF)
    • dhcpmon.exe (PID: 2300 cmdline: {path} MD5: 9D2A2B596CD979FC9674824D2AA731DF)
    • dhcpmon.exe (PID: 5420 cmdline: {path} MD5: 9D2A2B596CD979FC9674824D2AA731DF)
    • dhcpmon.exe (PID: 408 cmdline: {path} MD5: 9D2A2B596CD979FC9674824D2AA731DF)
  • cleanup
{"Version": "1.2.2.0", "Mutex": "c5cb65e3-79c3-43dc-bde0-43ed679c", "Group": "Default", "Domain1": "79.134.225.6", "Domain2": "", "Port": 60110, "KeyboardLogging": "Enable", "RunOnStartup": "Enable", "RequestElevation": "Disable", "BypassUAC": "Enable", "ClearZoneIdentifier": "Enable", "ClearAccessControl": "Disable", "SetCriticalProcess": "Enable", "PreventSystemSleep": "Enable", "ActivateAwayMode": "Enable", "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": "8.8.8.8", "BackupDNSServer": "8.8.4.4", "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>$(Arg0)</Arguments>\r\n    </Exec>\r\n  </Actions>\r\n</Task"}
SourceRuleDescriptionAuthorStrings
00000006.00000002.547986042.0000000005900000.00000004.08000000.00040000.00000000.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0xe75:$x1: NanoCore.ClientPluginHost
  • 0xe8f:$x2: IClientNetworkHost
00000006.00000002.547986042.0000000005900000.00000004.08000000.00040000.00000000.sdmpNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
  • 0xe75:$x2: NanoCore.ClientPluginHost
  • 0x1261:$s3: PipeExists
  • 0x1136:$s4: PipeCreated
  • 0xeb0:$s5: IClientLoggingHost
00000006.00000002.547986042.0000000005900000.00000004.08000000.00040000.00000000.sdmpMALWARE_Win_NanoCoreDetects NanoCoreditekSHen
  • 0xe38:$x2: NanoCore.ClientPlugin
  • 0xe75:$x3: NanoCore.ClientPluginHost
  • 0xe5a:$i1: IClientApp
  • 0xe4e:$i2: IClientData
  • 0xe29:$i3: IClientNetwork
  • 0xec3:$i4: IClientAppHost
  • 0xe65:$i5: IClientDataHost
  • 0xeb0:$i6: IClientLoggingHost
  • 0xe8f:$i7: IClientNetworkHost
  • 0xea2:$i8: IClientUIHost
  • 0xed2:$i9: IClientNameObjectCollection
  • 0xef7:$i10: IClientReadOnlyNameObjectCollection
  • 0xe41:$s1: ClientPlugin
  • 0x177c:$s1: ClientPlugin
  • 0x1789:$s1: ClientPlugin
  • 0x11f9:$s6: get_ClientSettings
  • 0x1249:$s7: get_Connected
00000006.00000002.547986042.0000000005900000.00000004.08000000.00040000.00000000.sdmpWindows_Trojan_Nanocore_d8c4e3c5unknownunknown
  • 0xe75:$a1: NanoCore.ClientPluginHost
  • 0xe38:$a2: NanoCore.ClientPlugin
  • 0x120c:$b1: get_BuilderSettings
  • 0xec3:$b4: IClientAppHost
  • 0x127d:$b6: AddHostEntry
  • 0x12ec:$b7: LogClientException
  • 0x1261:$b8: PipeExists
  • 0xeb0:$b9: IClientLoggingHost
00000010.00000002.400735152.000000000334B000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AntiVM_3Yara detected AntiVM_3Joe Security