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Windows Analysis Report xmsGPH324z.exe

Overview

General Information

Sample Name:xmsGPH324z.exe
Analysis ID:499483
MD5:6a4e9c8b6e38bab16622b8d26164b3fd
SHA1:03e107e3fd378d414297721ac63007a220a4d1cf
SHA256:b80e381178fe2bf37eb0101d9066864fb73cad0c825b807cd18d3f9a86a70147
Tags:exeNanoCoreRAT
Infos:

Most interesting Screenshot:

Detection

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

Signatures

Sigma detected: NanoCore
Detected Nanocore Rat
Yara detected AntiVM autoit script
Yara detected Nanocore RAT
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Connects to many ports of the same IP (likely port scanning)
Machine Learning detection for sample
Allocates memory in foreign processes
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
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 dynamic DNS services
Drops PE files with a suspicious file extension
Writes to foreign memory regions
Protects its processes via BreakOnTermination flag
Machine Learning detection for dropped file
Antivirus or Machine Learning detection for unpacked file
Contains functionality to query locales information (e.g. system language)
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Detected potential crypto function
Contains functionality to launch a process as a different user
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to check if a window is minimized (may be used to check if an application is visible)
Contains functionality to dynamically determine API calls
Contains functionality to simulate keystroke presses
Contains long sleeps (>= 3 min)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
PE file contains strange resources
Drops PE files
Tries to load missing DLLs
Contains functionality to read the PEB
Contains functionality to retrieve information about pressed keystrokes
Creates a process in suspended mode (likely to inject code)
Contains functionality for read data from the clipboard
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to shutdown / reboot the system
Contains functionality to execute programs as a different user
Contains functionality to query CPU information (cpuid)
Found potential string decryption / allocating functions
Contains functionality to communicate with device drivers
Contains functionality to read the clipboard data
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Installs a raw input device (often for capturing keystrokes)
File is packed with WinRar
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Detected TCP or UDP traffic on non-standard ports
Contains functionality to launch a program with higher privileges
Potential key logger detected (key state polling based)
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Contains functionality to simulate mouse events
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to block mouse and keyboard input (often used to hinder debugging)

Classification

Process Tree

  • System is w10x64
  • xmsGPH324z.exe (PID: 6760 cmdline: 'C:\Users\user\Desktop\xmsGPH324z.exe' MD5: 6A4E9C8B6E38BAB16622B8D26164B3FD)
    • emeighxa.pif (PID: 6880 cmdline: 'C:\Users\user\AppData\Roaming\14893442\emeighxa.pif' jljrgtr.lni MD5: 279DAE7236F5F2488A4BACDE6027F730)
      • RegSvcs.exe (PID: 7092 cmdline: C:\Users\user\AppData\Local\Temp\RegSvcs.exe MD5: 2867A3817C9245F7CF518524DFD18F28)
        • schtasks.exe (PID: 6188 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor' /xml 'C:\Users\user\AppData\Local\Temp\tmp2367.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
          • conhost.exe (PID: 5428 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
        • schtasks.exe (PID: 6252 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor Task' /xml 'C:\Users\user\AppData\Local\Temp\tmp2ADA.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
          • conhost.exe (PID: 6244 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • RegSvcs.exe (PID: 6300 cmdline: C:\Users\user\AppData\Local\Temp\RegSvcs.exe 0 MD5: 2867A3817C9245F7CF518524DFD18F28)
    • conhost.exe (PID: 5728 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • dhcpmon.exe (PID: 3664 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 0 MD5: 2867A3817C9245F7CF518524DFD18F28)
    • conhost.exe (PID: 5512 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • emeighxa.pif (PID: 2520 cmdline: 'C:\Users\user\AppData\Roaming\14893442\emeighxa.pif' C:\Users\user\AppData\Roaming\14893442\jljrgtr.lni MD5: 279DAE7236F5F2488A4BACDE6027F730)
    • RegSvcs.exe (PID: 6640 cmdline: C:\Users\user\AppData\Local\Temp\RegSvcs.exe MD5: 2867A3817C9245F7CF518524DFD18F28)
  • wscript.exe (PID: 6876 cmdline: 'C:\Windows\System32\WScript.exe' 'C:\Users\user\AppData\Roaming\14893442\Update.vbs' MD5: 9A68ADD12EB50DDE7586782C3EB9FF9C)
  • dhcpmon.exe (PID: 3920 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' MD5: 2867A3817C9245F7CF518524DFD18F28)
    • conhost.exe (PID: 5412 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000001.00000003.388444207.00000000046BE000.00000004.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0x101f5:$x1: NanoCore.ClientPluginHost
  • 0x10232:$x2: IClientNetworkHost
  • 0x13d65:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
00000001.00000003.388444207.00000000046BE000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    00000001.00000003.388444207.00000000046BE000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0xff5d:$a: NanoCore
    • 0xff6d:$a: NanoCore
    • 0x101a1:$a: NanoCore
    • 0x101b5:$a: NanoCore
    • 0x101f5:$a: NanoCore
    • 0xffbc:$b: ClientPlugin
    • 0x101be:$b: ClientPlugin
    • 0x101fe:$b: ClientPlugin
    • 0x100e3:$c: ProjectData
    • 0x10aea:$d: DESCrypto
    • 0x184b6:$e: KeepAlive
    • 0x164a4:$g: LogClientMessage
    • 0x1269f:$i: get_Connected
    • 0x10e20:$j: #=q
    • 0x10e50:$j: #=q
    • 0x10e6c:$j: #=q
    • 0x10e9c:$j: #=q
    • 0x10eb8:$j: #=q
    • 0x10ed4:$j: #=q
    • 0x10f04:$j: #=q
    • 0x10f20:$j: #=q
    00000001.00000003.380250613.000000000468A000.00000004.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0xfc0d:$x1: NanoCore.ClientPluginHost
    • 0xfc4a:$x2: IClientNetworkHost
    • 0x1377d:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    00000001.00000003.380250613.000000000468A000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      Click to see the 117 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      15.3.emeighxa.pif.43c7078.3.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xe38d:$x1: NanoCore.ClientPluginHost
      • 0xe3ca:$x2: IClientNetworkHost
      • 0x11efd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
      15.3.emeighxa.pif.43c7078.3.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xe105:$x1: NanoCore Client.exe
      • 0xe38d:$x2: NanoCore.ClientPluginHost
      • 0xf9c6:$s1: PluginCommand
      • 0xf9ba:$s2: FileCommand
      • 0x1086b:$s3: PipeExists
      • 0x16622:$s4: PipeCreated
      • 0xe3b7:$s5: IClientLoggingHost
      15.3.emeighxa.pif.43c7078.3.unpackJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
        15.3.emeighxa.pif.43c7078.3.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:$i: get_Connected
        • 0x201:$j: #=q
        • 0x21d:$j: #=q
        • 0x24d:$j: #=q
        • 0x27d:$j: #=q
        • 0x2ad:$j: #=q
        • 0x2c9:$j: #=q
        • 0x2e5:$j: #=q
        • 0x301:$j: #=q
        20.2.RegSvcs.exe.359e710.2.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
        • 0x1646:$x1: NanoCore.ClientPluginHost