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Analysis Report payment invoice.exe

Overview

General Information

Sample Name:payment invoice.exe
Analysis ID:431785
MD5:845d5dc8393bf7652f744e7fa7dfb3c3
SHA1:f83096a377039cfdbcfb930a98fd1b78691c4456
SHA256:3aa4556bd929b55c5a51ea8cd76865fd4e27b880ec483aa8a94582071cdef24d
Tags:exeNanoCore
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 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)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Antivirus or Machine Learning detection for unpacked file
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
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)
Found inlined nop instructions (likely shell or obfuscated code)
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

Process Tree

  • System is w10x64
  • payment invoice.exe (PID: 6660 cmdline: 'C:\Users\user\Desktop\payment invoice.exe' MD5: 845D5DC8393BF7652F744E7FA7DFB3C3)
    • schtasks.exe (PID: 6332 cmdline: 'C:\Windows\System32\schtasks.exe' /Create /TN 'Updates\GotewYBrdNy' /XML 'C:\Users\user\AppData\Local\Temp\tmpC705.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 6320 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • payment invoice.exe (PID: 6568 cmdline: {path} MD5: 845D5DC8393BF7652F744E7FA7DFB3C3)
      • schtasks.exe (PID: 408 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor' /xml 'C:\Users\user\AppData\Local\Temp\tmpD79F.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 4648 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • payment invoice.exe (PID: 976 cmdline: 'C:\Users\user\Desktop\payment invoice.exe' 0 MD5: 845D5DC8393BF7652F744E7FA7DFB3C3)
    • schtasks.exe (PID: 1688 cmdline: 'C:\Windows\System32\schtasks.exe' /Create /TN 'Updates\GotewYBrdNy' /XML 'C:\Users\user\AppData\Local\Temp\tmp70E1.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 6236 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "1.2.2.0", "Mutex": "64d6914b-2a13-4387-9ead-01228df9", "Group": "Default", "Domain1": "ifybest85fff.ddns.net", "Domain2": "194.5.98.23", "Port": 7600, "KeyboardLogging": "Enable", "RunOnStartup": "Disable", "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": "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"}

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
0000000B.00000000.464661919.0000000000402000.00000040.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0xff8d:$x1: NanoCore.ClientPluginHost
  • 0xffca:$x2: IClientNetworkHost
  • 0x13afd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
0000000B.00000000.464661919.0000000000402000.00000040.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    0000000B.00000000.464661919.0000000000402000.00000040.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0xfcf5:$a: NanoCore
    • 0xfd05:$a: NanoCore
    • 0xff39:$a: NanoCore
    • 0xff4d:$a: NanoCore
    • 0xff8d:$a: NanoCore
    • 0xfd54:$b: ClientPlugin
    • 0xff56:$b: ClientPlugin
    • 0xff96:$b: ClientPlugin
    • 0xfe7b:$c: ProjectData
    • 0x10882:$d: DESCrypto
    • 0x1824e:$e: KeepAlive
    • 0x1623c:$g: LogClientMessage
    • 0x12437:$i: get_Connected
    • 0x10bb8:$j: #=q
    • 0x10be8:$j: #=q
    • 0x10c04:$j: #=q
    • 0x10c34:$j: #=q
    • 0x10c50:$j: #=q
    • 0x10c6c:$j: #=q
    • 0x10c9c:$j: #=q
    • 0x10cb8:$j: #=q
    0000000B.00000002.646691613.0000000003AB7000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      0000000B.00000002.643057638.0000000002A61000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
        Click to see the 78 entries

        Unpacked PEs

        SourceRuleDescriptionAuthorStrings
        11.2.payment invoice.exe.400000.0.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
        • 0x1018d:$x1: NanoCore.ClientPluginHost
        • 0x101ca:$x2: IClientNetworkHost
        • 0x13cfd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
        11.2.payment invoice.exe.400000.0.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
        • 0xff05:$x1: NanoCore Client.exe
        • 0x1018d:$x2: NanoCore.ClientPluginHost
        • 0x117c6:$s1: PluginCommand
        • 0x117ba:$s2: FileCommand
        • 0x1266b:$s3: PipeExists
        • 0x18422:$s4: PipeCreated
        • 0x101b7:$s5: IClientLoggingHost
        11.2.payment invoice.exe.400000.0.unpackJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
          11.2.payment invoice.exe.400000.0.unpackNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
          • 0xfef5:$a: NanoCore
          • 0xff05:$a: NanoCore
          • 0x10139:$a: NanoCore
          • 0x1014d:$a: NanoCore
          • 0x1018d:$a: NanoCore
          • 0xff54:$b: ClientPlugin
          • 0x10156:$b: ClientPlugin
          • 0x10196:$b: ClientPlugin
          • 0x1007b:$c: ProjectData
          • 0x10a82:$d: DESCrypto
          • 0x1844e:$e: KeepAlive
          • 0x1643c:$g: LogClientMessage
          • 0x12637:$i: get_Connected
          • 0x10db8:$j: #=q
          • 0x10de8:$j: #=q
          • 0x10e04:$j: #=q
          • 0x10e34:$j: #=q
          • 0x10e50:$j: #=q
          • 0x10e6c:$j: #=q
          • 0x10e9c:$j: #=q
          • 0x10eb8:$j: #=q
          11.2.payment invoice.exe.6f10000.23.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
          • 0x16e3:$x1: NanoCore.ClientPluginHost
          • 0x171c:$x2: IClientNetworkHost