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Windows Analysis Report LFEs2N6DU4.exe

Overview

General Information

Sample Name:LFEs2N6DU4.exe
Analysis ID:502379
MD5:5b3262b61a5eaa3ebe7e8bdc4958fc3f
SHA1:112314d871226e07180bf2d0a2852120cbc1399f
SHA256:799a0831a87f80ddced683cf26c082c58c936a1bb868dd0e97552a9f035ba4ee
Tags:exeNanoCore
Infos:

Most interesting Screenshot:

Detection

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

Signatures

Found malware configuration
Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Sigma detected: NanoCore
Detected Nanocore Rat
Yara detected Nanocore RAT
Writes to foreign memory regions
Allocates memory in foreign processes
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
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)
HTTP GET or POST without a user agent
IP address seen in connection with other malware
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)
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
Binary contains a suspicious time stamp
Creates a process in suspended mode (likely to inject code)

Classification

Process Tree

  • System is w10x64
  • LFEs2N6DU4.exe (PID: 2752 cmdline: 'C:\Users\user\Desktop\LFEs2N6DU4.exe' MD5: 5B3262B61A5EAA3EBE7E8BDC4958FC3F)
    • LFEs2N6DU4.exe (PID: 3784 cmdline: C:\Users\user\AppData\Local\Temp\LFEs2N6DU4.exe MD5: 5B3262B61A5EAA3EBE7E8BDC4958FC3F)
      • schtasks.exe (PID: 5828 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor' /xml 'C:\Users\user\AppData\Local\Temp\tmpA85B.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 6008 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 2944 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor Task' /xml 'C:\Users\user\AppData\Local\Temp\tmpAD7D.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 4196 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • LFEs2N6DU4.exe (PID: 2860 cmdline: C:\Users\user\AppData\Local\Temp\LFEs2N6DU4.exe 0 MD5: 5B3262B61A5EAA3EBE7E8BDC4958FC3F)
    • LFEs2N6DU4.exe (PID: 6504 cmdline: C:\Users\user\AppData\Local\Temp\LFEs2N6DU4.exe MD5: 5B3262B61A5EAA3EBE7E8BDC4958FC3F)
  • dhcpmon.exe (PID: 6188 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 0 MD5: 5B3262B61A5EAA3EBE7E8BDC4958FC3F)
    • dhcpmon.exe (PID: 6648 cmdline: C:\Users\user\AppData\Local\Temp\dhcpmon.exe MD5: 5B3262B61A5EAA3EBE7E8BDC4958FC3F)
  • dhcpmon.exe (PID: 6304 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' MD5: 5B3262B61A5EAA3EBE7E8BDC4958FC3F)
    • dhcpmon.exe (PID: 6732 cmdline: C:\Users\user\AppData\Local\Temp\dhcpmon.exe MD5: 5B3262B61A5EAA3EBE7E8BDC4958FC3F)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "1.2.2.0", "Mutex": "9845a945-f2ff-4e93-b909-aece664d", "Group": "J", "Domain1": "cloudhost.myfirewall.org", "Domain2": "cloudhost.myfirewall.org", "Port": 5654, "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", "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
00000018.00000002.395949741.0000000004179000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    00000018.00000002.395949741.0000000004179000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0x4356d:$a: NanoCore
    • 0x435c6:$a: NanoCore
    • 0x43603:$a: NanoCore
    • 0x4367c:$a: NanoCore
    • 0x56d27:$a: NanoCore
    • 0x56d3c:$a: NanoCore
    • 0x56d71:$a: NanoCore
    • 0x6fd3b:$a: NanoCore
    • 0x6fd50:$a: NanoCore
    • 0x6fd85:$a: NanoCore
    • 0x435cf:$b: ClientPlugin
    • 0x4360c:$b: ClientPlugin
    • 0x43f0a:$b: ClientPlugin
    • 0x43f17:$b: ClientPlugin
    • 0x56ae3:$b: ClientPlugin
    • 0x56afe:$b: ClientPlugin
    • 0x56b2e:$b: ClientPlugin
    • 0x56d45:$b: ClientPlugin
    • 0x56d7a:$b: ClientPlugin
    • 0x6faf7:$b: ClientPlugin
    • 0x6fb12:$b: ClientPlugin
    00000016.00000002.399257150.0000000003BBA000.00000004.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0x37cdd:$x1: NanoCore.ClientPluginHost
    • 0x5fcfd:$x1: NanoCore.ClientPluginHost
    • 0x37d1a:$x2: IClientNetworkHost
    • 0x5fd3a:$x2: IClientNetworkHost
    • 0x3b84d:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    • 0x6386d:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    00000016.00000002.399257150.0000000003BBA000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      00000016.00000002.399257150.0000000003BBA000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
      • 0x37a45:$a: NanoCore
      • 0x37a55:$a: NanoCore
      • 0x37c89:$a: NanoCore
      • 0x37c9d:$a: NanoCore
      • 0x37cdd:$a: NanoCore
      • 0x5fa65:$a: NanoCore
      • 0x5fa75:$a: NanoCore
      • 0x5fca9:$a: NanoCore
      • 0x5fcbd:$a: NanoCore
      • 0x5fcfd:$a: NanoCore
      • 0x37aa4:$b: ClientPlugin
      • 0x37ca6:$b: ClientPlugin
      • 0x37ce6:$b: ClientPlugin
      • 0x5fac4:$b: ClientPlugin
      • 0x5fcc6:$b: ClientPlugin
      • 0x5fd06:$b: ClientPlugin
      • 0x37bcb:$c: ProjectData
      • 0x5fbeb:$c: ProjectData
      • 0x385d2:$d: DESCrypto
      • 0x605f2:$d: DESCrypto
      • 0x3ff9e:$e: KeepAlive
      Click to see the 83 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      25.2.dhcpmon.exe.3c005c4.4.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xf7ad:$x1: NanoCore.ClientPluginHost
      • 0x287c1:$x1: NanoCore.ClientPluginHost
      • 0xf7da:$x2: IClientNetworkHost
      • 0x287ee:$x2: IClientNetworkHost
      25.2.dhcpmon.exe.3c005c4.4.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xf7ad:$x2: NanoCore.ClientPluginHost
      • 0x287c1:$x2: NanoCore.ClientPluginHost
      • 0x10888:$s4: PipeCreated
      • 0x2989c:$s4: PipeCreated
      • 0xf7c7:$s5: IClientLoggingHost
      • 0x287db:$s5: IClientLoggingHost
      25.2.dhcpmon.exe.3c005c4.4.raw.unpackJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
        25.2.dhcpmon.exe.3c005c4.4.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
        • 0xd9ad:$x1: NanoCore.ClientPluginHost
        • 0xd9da:$x2: IClientNetworkHost
        25.2.dhcpmon.exe.3c005c4.4.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
        • 0xd9ad:$x2: NanoCore.ClientPluginHost
        • 0xea88:$s4: PipeCreated
        • 0xd9c7:$s5: IClientLoggingHost