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Windows Analysis Report Eral_order_8499248_pdf.exe

Overview

General Information

Sample Name:Eral_order_8499248_pdf.exe
Analysis ID:499571
MD5:c87a4d4a3d7055d3fb628e9f5034200a
SHA1:fcaea92aebebd7ed940e1fab475a99d4bb08c45b
SHA256:5925ea17cc4efd2b4f52887a3d669aa83c52e3aa14df43c7f275d2d9d33ad5df
Tags:exe
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)
Detected unpacking (overwrites its own PE header)
Sigma detected: NanoCore
Detected Nanocore Rat
Detected unpacking (changes PE section rights)
Yara detected Nanocore RAT
Detected unpacking (creates a PE file in dynamic memory)
Initial sample is a PE file and has a suspicious name
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 schtasks.exe or at.exe to add and modify task schedules
Uses 32bit PE files
Yara signature match
Antivirus or Machine Learning detection for unpacked file
Contains functionality to check if a debugger is running (IsDebuggerPresent)
May sleep (evasive loops) to hinder dynamic analysis
Contains functionality to shutdown / reboot the system
Uses code obfuscation techniques (call, push, ret)
Internet Provider seen in connection with other malware
Detected potential crypto function
Contains functionality to query CPU information (cpuid)
Found potential string decryption / allocating functions
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to call native functions
Contains functionality which may be used to detect a debugger (GetProcessHeap)
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
PE file contains an invalid checksum
Drops PE files
Contains functionality to read the PEB
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Detected TCP or UDP traffic on non-standard ports
Creates a process in suspended mode (likely to inject code)
Contains functionality for read data from the clipboard

Classification

Process Tree

  • System is w10x64
  • Eral_order_8499248_pdf.exe (PID: 6636 cmdline: 'C:\Users\user\Desktop\Eral_order_8499248_pdf.exe' MD5: C87A4D4A3D7055D3FB628E9F5034200A)
    • Eral_order_8499248_pdf.exe (PID: 2932 cmdline: 'C:\Users\user\Desktop\Eral_order_8499248_pdf.exe' MD5: C87A4D4A3D7055D3FB628E9F5034200A)
      • schtasks.exe (PID: 4556 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor' /xml 'C:\Users\user\AppData\Local\Temp\tmp8379.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 4508 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • Eral_order_8499248_pdf.exe (PID: 5284 cmdline: C:\Users\user\Desktop\Eral_order_8499248_pdf.exe 0 MD5: C87A4D4A3D7055D3FB628E9F5034200A)
    • Eral_order_8499248_pdf.exe (PID: 6592 cmdline: C:\Users\user\Desktop\Eral_order_8499248_pdf.exe 0 MD5: C87A4D4A3D7055D3FB628E9F5034200A)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "1.2.2.0", "Mutex": "8eff5e85-5667-437d-b37d-ffe758cd", "Group": "NETH", "Domain1": "185.157.162.92", "Domain2": "", "Port": 2036, "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
00000001.00000002.556639770.00000000038ED000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    00000001.00000002.556639770.00000000038ED000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0x1068d:$a: NanoCore
    • 0x106e6:$a: NanoCore
    • 0x10723:$a: NanoCore
    • 0x1079c:$a: NanoCore
    • 0x23e47:$a: NanoCore
    • 0x23e5c:$a: NanoCore
    • 0x23e91:$a: NanoCore
    • 0x3ce1b:$a: NanoCore
    • 0x3ce30:$a: NanoCore
    • 0x3ce65:$a: NanoCore
    • 0x106ef:$b: ClientPlugin
    • 0x1072c:$b: ClientPlugin
    • 0x1102a:$b: ClientPlugin
    • 0x11037:$b: ClientPlugin
    • 0x23c03:$b: ClientPlugin
    • 0x23c1e:$b: ClientPlugin
    • 0x23c4e:$b: ClientPlugin
    • 0x23e65:$b: ClientPlugin
    • 0x23e9a:$b: ClientPlugin
    • 0x3cbd7:$b: ClientPlugin
    • 0x3cbf2:$b: ClientPlugin
    00000001.00000002.557530361.0000000005220000.00000004.00020000.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0xf7ad:$x1: NanoCore.ClientPluginHost
    • 0xf7da:$x2: IClientNetworkHost
    00000001.00000002.557530361.0000000005220000.00000004.00020000.sdmpNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
    • 0xf7ad:$x2: NanoCore.ClientPluginHost
    • 0x10888:$s4: PipeCreated
    • 0xf7c7:$s5: IClientLoggingHost
    00000001.00000002.557530361.0000000005220000.00000004.00020000.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      Click to see the 60 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      8.2.Eral_order_8499248_pdf.exe.415058.0.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xe38d:$x1: NanoCore.ClientPluginHost
      • 0xe3ca:$x2: IClientNetworkHost
      • 0x11efd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
      8.2.Eral_order_8499248_pdf.exe.415058.0.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xe105:$x1: NanoCore Client.exe
      • 0xe38d:$x2: NanoCore.ClientPluginHost
      • 0xf9c6:$s1: PluginCommand
      • 0xf9ba:$s2: FileCommand
      • 0x1086b:$s3: PipeExists
      • 0x16622:$s4: PipeCreated
      • 0xe3b7:$s5: IClientLoggingHost
      8.2.Eral_order_8499248_pdf.exe.415058.0.unpackJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
        8.2.Eral_order_8499248_pdf.exe.415058.0.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:$j: #=q
        7.2.Eral_order_8499248_pdf.exe.e801458.3.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
        • 0x1018d:$x1: NanoCore.ClientPluginHost
        • 0x101ca:$x2: IClientNetworkHost
        • 0x13cfd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe