Loading ...

Play interactive tourEdit tour

Windows Analysis Report PO#0065026.doc.exe

Overview

General Information

Sample Name:PO#0065026.doc.exe
Analysis ID:553030
MD5:233064525984666fe973125f4e60c903
SHA1:91bec44a6ff58c22cc58122b2daab04fd54dcf8e
SHA256:30e1ba61a63a27b668eee09f960a83d944e878c33b46f85ea86bacdf1427f4dd
Tags:exeNanoCoreRAT
Infos:

Most interesting Screenshot:

Detection

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

Signatures

Found malware configuration
Sigma detected: Suspicious Double Extension
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Detected unpacking (overwrites its own PE header)
Sigma detected: NanoCore
Yara detected AntiVM3
Detected Nanocore Rat
Detected unpacking (changes PE section rights)
Multi AV Scanner detection for dropped file
Yara detected Nanocore RAT
Initial sample is a PE file and has a suspicious name
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Sigma detected: Suspicius Add Task From User AppData Temp
Machine Learning detection for sample
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
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 an obfuscated file name to hide its real file extension (double extension)
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
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
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)
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
PE file contains strange resources
Drops PE files
Detected TCP or UDP traffic on non-standard ports
Creates a process in suspended mode (likely to inject code)

Classification

Process Tree

  • System is w10x64
  • PO#0065026.doc.exe (PID: 7096 cmdline: "C:\Users\user\Desktop\PO#0065026.doc.exe" MD5: 233064525984666FE973125F4E60C903)
    • PO#0065026.doc.exe (PID: 5348 cmdline: C:\Users\user\Desktop\PO#0065026.doc.exe MD5: 233064525984666FE973125F4E60C903)
      • schtasks.exe (PID: 6524 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor" /xml "C:\Users\user\AppData\Local\Temp\tmp71C5.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 6664 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 6724 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor Task" /xml "C:\Users\user\AppData\Local\Temp\tmp7E78.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 6604 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • PO#0065026.doc.exe (PID: 6712 cmdline: C:\Users\user\Desktop\PO#0065026.doc.exe 0 MD5: 233064525984666FE973125F4E60C903)
    • PO#0065026.doc.exe (PID: 7160 cmdline: C:\Users\user\Desktop\PO#0065026.doc.exe MD5: 233064525984666FE973125F4E60C903)
  • dhcpmon.exe (PID: 7112 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" 0 MD5: 233064525984666FE973125F4E60C903)
  • dhcpmon.exe (PID: 1312 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" MD5: 233064525984666FE973125F4E60C903)
    • dhcpmon.exe (PID: 6616 cmdline: C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe MD5: 233064525984666FE973125F4E60C903)
    • dhcpmon.exe (PID: 6592 cmdline: C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe MD5: 233064525984666FE973125F4E60C903)
    • BackgroundTransferHost.exe (PID: 6616 cmdline: "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1 MD5: 02BA81746B929ECC9DB6665589B68335)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "1.2.2.0", "Mutex": "1122355e-5fe3-470d-a458-8c4cf035", "Group": "Default", "Domain1": "185.140.53.132", "Domain2": "127.0.0.1", "Port": 1604, "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": "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
00000016.00000000.366825626.0000000000402000.00000040.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0xff8d:$x1: NanoCore.ClientPluginHost
  • 0xffca:$x2: IClientNetworkHost
  • 0x13afd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
00000016.00000000.366825626.0000000000402000.00000040.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    00000016.00000000.366825626.0000000000402000.00000040.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0xfcf5:$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
    00000013.00000000.333627100.0000000000402000.00000040.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0xff8d:$x1: NanoCore.ClientPluginHost
    • 0xffca:$x2: IClientNetworkHost
    • 0x13afd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    00000013.00000000.333627100.0000000000402000.00000040.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      Click to see the 80 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      1.2.PO#0065026.doc.exe.5131b38.5.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xe38d:$x1: NanoCore.ClientPluginHost
      • 0xe3ca:$x2: IClientNetworkHost
      • 0x11efd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
      1.2.PO#0065026.doc.exe.5131b38.5.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xe105:$x1: NanoCore Client.exe
      • 0xe38d:$x2: NanoCore.ClientPluginHost
      • 0xf9c6:$s1: PluginCommand
      • 0xf9ba:$s2: FileCommand
      • 0x1086b:$s3: PipeExists
      • 0x16622:$s4: PipeCreated
      • 0xe3b7:$s5: IClientLoggingHost
      1.2.PO#0065026.doc.exe.5131b38.5.unpackJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
        1.2.PO#0065026.doc.exe.5131b38.5.unpackNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
        • 0xe0f5:$a: NanoCore
        • 0xe105:$a: NanoCore
        • 0xe339:$a: NanoCore
        • 0xe34d:$a: NanoCore
        • 0xe38d:$a: NanoCore
        • 0xe154:$b: ClientPlugin
        • 0xe356:$b: ClientPlugin
        • 0xe396:$b: ClientPlugin
        • 0xe27b:$c: ProjectData
        • 0xec82:$d: DESCrypto
        • 0x1664e:$e: KeepAlive
        • 0x1463c:$g: LogClientMessage
        • 0x10837:$i: get_Connected
        • 0xefb8:$j: #=q
        • 0xefe8:$j: #=q
        • 0xf004:$j: #=q
        • 0xf034:$j: #=q
        • 0xf050:$j: #=q
        • 0xf06c:$j: #=q
        • 0xf09c:$j: #=q
        • 0xf0b8:$j: #=q
        19.0.PO#0065026.doc.exe.400000.8.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
        • 0x1018d:$x1: NanoCore.ClientPluginHost
        • 0x101ca:$x2: IClientNetworkHost
        • 0x13cfd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe