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Windows Analysis Report Purchase Order - MULBERRY PTY LTD PO# 8083 .exe

Overview

General Information

Sample Name:Purchase Order - MULBERRY PTY LTD PO# 8083 .exe
Analysis ID:526064
MD5:73f150f9addd1b8c71edb0af02689742
SHA1:87c19c7df6ccdb108feb578d1422797780ad4716
SHA256:04fbd90fa1d4c3fb72e4a96104eb36873b83b098b8ac193e615b341db5752645
Infos:

Most interesting Screenshot:

Detection

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

Signatures

Found malware configuration
Malicious sample detected (through community Yara rule)
Sigma detected: NanoCore
Detected Nanocore Rat
Antivirus detection for dropped file
Yara detected Nanocore RAT
Detected unpacking (creates a PE file in dynamic memory)
Initial sample is a PE file and has a suspicious name
Sigma detected: Suspicius Add Task From User AppData Temp
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Executable has a suspicious name (potential lure to open the executable)
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)
Found evasive API chain (may stop execution after checking a module file name)
Contains functionality to check if a debugger is running (OutputDebugString,GetLastError)
Contains functionality to call native functions
Contains functionality to dynamically determine API calls
Creates processes with suspicious names
Contains functionality which may be used to detect a debugger (GetProcessHeap)
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)
Found inlined nop instructions (likely shell or obfuscated code)
Installs a raw input device (often for capturing keystrokes)
Sample file is different than original file name gathered from version info
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
  • Purchase Order - MULBERRY PTY LTD PO# 8083 .exe (PID: 4828 cmdline: "C:\Users\user\Desktop\Purchase Order - MULBERRY PTY LTD PO# 8083 .exe" MD5: 73F150F9ADDD1B8C71EDB0AF02689742)
    • Purchase Order - MULBERRY PTY LTD PO# 8083 .exe (PID: 6572 cmdline: "C:\Users\user\Desktop\Purchase Order - MULBERRY PTY LTD PO# 8083 .exe" MD5: 73F150F9ADDD1B8C71EDB0AF02689742)
      • schtasks.exe (PID: 6736 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor" /xml "C:\Users\user\AppData\Local\Temp\tmp5CB6.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 6724 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 4980 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor Task" /xml "C:\Users\user\AppData\Local\Temp\tmp6429.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 5340 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • wuapihost.exe (PID: 4980 cmdline: C:\Windows\System32\wuapihost.exe -Embedding MD5: 85C9C161B102A164EC09A23CACDDD09E)
  • dhcpmon.exe (PID: 5788 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" 0 MD5: 73F150F9ADDD1B8C71EDB0AF02689742)
    • dhcpmon.exe (PID: 6684 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" 0 MD5: 73F150F9ADDD1B8C71EDB0AF02689742)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "1.2.2.0", "Mutex": "9cae05bf-9274-4cf6-bafd-b5dbdfaf", "Group": "Default", "Domain1": "79.134.225.112", "Domain2": "", "Port": 6432, "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
0000000F.00000002.717988844.00000000036EC000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    0000000F.00000002.717988844.00000000036EC000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0x482e5:$a: NanoCore
    • 0x4833e:$a: NanoCore
    • 0x4837b:$a: NanoCore
    • 0x483f4:$a: NanoCore
    • 0x4d989:$a: NanoCore
    • 0x4d9d3:$a: NanoCore
    • 0x4dbbd:$a: NanoCore
    • 0x614dc:$a: NanoCore
    • 0x614f1:$a: NanoCore
    • 0x61526:$a: NanoCore
    • 0x7a4b3:$a: NanoCore
    • 0x7a4c8:$a: NanoCore
    • 0x7a4fd:$a: NanoCore
    • 0x48347:$b: ClientPlugin
    • 0x48384:$b: ClientPlugin
    • 0x48c82:$b: ClientPlugin
    • 0x48c8f:$b: ClientPlugin
    • 0x4d722:$b: ClientPlugin
    • 0x4d992:$b: ClientPlugin
    • 0x4d9dc:$b: ClientPlugin
    • 0x61298:$b: ClientPlugin
    0000000D.00000002.711791152.000000000282E000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0x19673:$a: NanoCore
    • 0x196cc:$a: NanoCore
    • 0x19709:$a: NanoCore
    • 0x19782:$a: NanoCore
    • 0x1ef66:$a: NanoCore
    • 0x1efb0:$a: NanoCore
    • 0x1f19a:$a: NanoCore
    • 0x196d5:$b: ClientPlugin
    • 0x19712:$b: ClientPlugin
    • 0x1a010:$b: ClientPlugin
    • 0x1a01d:$b: ClientPlugin
    • 0x1ecff:$b: ClientPlugin
    • 0x1ef6f:$b: ClientPlugin
    • 0x1efb9:$b: ClientPlugin
    • 0x1f4d1:$c: ProjectData
    • 0xee16:$e: KeepAlive
    • 0x19b5d:$g: LogClientMessage
    • 0x1f3c4:$g: LogClientMessage
    • 0x19add:$i: get_Connected
    • 0xeefb:$j: #=q
    • 0xef2b:$j: #=q
    00000003.00000002.912664757.0000000002322000.00000040.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0xff8d:$x1: NanoCore.ClientPluginHost
    • 0xffca:$x2: IClientNetworkHost
    • 0x13afd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    00000003.00000002.912664757.0000000002322000.00000040.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      Click to see the 108 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      3.2.Purchase Order - MULBERRY PTY LTD PO# 8083 .exe.5100000.11.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0x1646:$x1: NanoCore.ClientPluginHost
      3.2.Purchase Order - MULBERRY PTY LTD PO# 8083 .exe.5100000.11.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0x1646:$x2: NanoCore.ClientPluginHost
      • 0x1724:$s4: PipeCreated
      • 0x1660:$s5: IClientLoggingHost
      3.2.Purchase Order - MULBERRY PTY LTD PO# 8083 .exe.5110000.13.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xf7ad:$x1: NanoCore.ClientPluginHost
      • 0xf7da:$x2: IClientNetworkHost
      3.2.Purchase Order - MULBERRY PTY LTD PO# 8083 .exe.5110000.13.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xf7ad:$x2: NanoCore.ClientPluginHost
      • 0x10888:$s4: PipeCreated
      • 0xf7c7:$s5: IClientLoggingHost
      3.2.Purchase Order - MULBERRY PTY LTD PO# 8083 .exe.5110000.13.raw.unpackJoeSecurity_NanocoreYara detected Nanocore RATJoe Security