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Windows Analysis Report G2M8C76V_INV0ICE_RECEIPT.exe


General Information

Sample Name:G2M8C76V_INV0ICE_RECEIPT.exe
Analysis ID:552628

Most interesting Screenshot:


Range:0 - 100


Found malware configuration
Malicious sample detected (through community Yara rule)
Sigma detected: NanoCore
Detected Nanocore Rat
Antivirus detection for URL or domain
Multi AV Scanner detection for dropped file
Yara detected Nanocore RAT
Detected unpacking (creates a PE file in dynamic memory)
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
C2 URLs / IPs found in malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Uses dynamic DNS services
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
Contains functionality to dynamically determine API calls
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
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 strange resources
Drops PE files
Contains functionality to read the PEB
Detected TCP or UDP traffic on non-standard ports
Found large amount of non-executed APIs
Creates a process in suspended mode (likely to inject code)
Contains functionality for read data from the clipboard


Process Tree

  • System is w10x64
  • G2M8C76V_INV0ICE_RECEIPT.exe (PID: 6964 cmdline: "C:\Users\user\Desktop\G2M8C76V_INV0ICE_RECEIPT.exe" MD5: D272E884F59FF9D7921619F88766709D)
    • G2M8C76V_INV0ICE_RECEIPT.exe (PID: 7092 cmdline: "C:\Users\user\Desktop\G2M8C76V_INV0ICE_RECEIPT.exe" MD5: D272E884F59FF9D7921619F88766709D)
  • chmac.exe (PID: 6288 cmdline: "C:\Users\user\AppData\Roaming\dihsw\chmac.exe" MD5: D272E884F59FF9D7921619F88766709D)
    • chmac.exe (PID: 6556 cmdline: "C:\Users\user\AppData\Roaming\dihsw\chmac.exe" MD5: D272E884F59FF9D7921619F88766709D)
  • chmac.exe (PID: 6760 cmdline: "C:\Users\user\AppData\Roaming\dihsw\chmac.exe" MD5: D272E884F59FF9D7921619F88766709D)
    • chmac.exe (PID: 6820 cmdline: "C:\Users\user\AppData\Roaming\dihsw\chmac.exe" MD5: D272E884F59FF9D7921619F88766709D)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "", "Mutex": "1f8684ca-0835-4252-89d1-4a2b1be1", "Group": "boy of john", "Domain1": "boyhome5100.duckdns.org", "Domain2": "boyhome5100.duckdns.org", "Port": 5100, "KeyboardLogging": "Enable", "RunOnStartup": "Disable", "RequestElevation": "Disable", "BypassUAC": "Disable", "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": "", "BackupDNSServer": ""}

Yara Overview

Memory Dumps

0000000E.00000002.341257135.0000000003731000.00000004.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0x123e5:$x1: NanoCore.ClientPluginHost
  • 0x12422:$x2: IClientNetworkHost
  • 0x15f55:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
0000000E.00000002.341257135.0000000003731000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    0000000E.00000002.341257135.0000000003731000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0x1214d:$a: NanoCore
    • 0x1215d:$a: NanoCore
    • 0x12391:$a: NanoCore
    • 0x123a5:$a: NanoCore
    • 0x123e5:$a: NanoCore
    • 0x121ac:$b: ClientPlugin
    • 0x123ae:$b: ClientPlugin
    • 0x123ee:$b: ClientPlugin
    • 0x122d3:$c: ProjectData
    • 0x12cda:$d: DESCrypto
    • 0x1a6a6:$e: KeepAlive
    • 0x18694:$g: LogClientMessage
    • 0x1488f:$i: get_Connected
    • 0x13010:$j: #=q
    • 0x13040:$j: #=q
    • 0x1305c:$j: #=q
    • 0x1308c:$j: #=q
    • 0x130a8:$j: #=q
    • 0x130c4:$j: #=q
    • 0x130f4:$j: #=q
    • 0x13110:$j: #=q
    0000000E.00000000.322700795.0000000000414000.00000040.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0x111e5:$x1: NanoCore.ClientPluginHost
    • 0x11222:$x2: IClientNetworkHost
    • 0x14d55:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    0000000E.00000000.322700795.0000000000414000.00000040.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      Click to see the 92 entries

      Unpacked PEs

      16.2.chmac.exe.2906888.5.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xe75:$x1: NanoCore.ClientPluginHost
      • 0xe8f:$x2: IClientNetworkHost
      16.2.chmac.exe.2906888.5.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xe75:$x2: NanoCore.ClientPluginHost
      • 0x1261:$s3: PipeExists
      • 0x1136:$s4: PipeCreated
      • 0xeb0:$s5: IClientLoggingHost
      14.2.chmac.exe.400000.1.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0x215e5:$x1: NanoCore.ClientPluginHost
      • 0x21622:$x2: IClientNetworkHost
      • 0x25155:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
      14.2.chmac.exe.400000.1.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0x2135d:$x1: NanoCore Client.exe
      • 0x215e5:$x2: NanoCore.ClientPluginHost
      • 0x22c1e:$s1: PluginCommand
      • 0x22c12:$s2: FileCommand
      • 0x23ac3:$s3: PipeExists
      • 0x2987a:$s4: PipeCreated
      • 0x2160f:$s5: IClientLoggingHost
      14.2.chmac.exe.400000.1.unpackJoeSecurity_NanocoreYara detected Nanocore RATJoe Security