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Windows Analysis Report Purchase Order.exe

Overview

General Information

Sample Name:Purchase Order.exe
Analysis ID:526911
MD5:3f4e18fa2e1404e2c8f7f7e58c0dae4e
SHA1:435587d7a9213b7f42086d2b39d06c90e6d8391a
SHA256:5a608e9daf5aca1ccf0e6ef4cdbc826a02ba11037626787d6a35d2ff08cdb08a
Tags:exenanocore
Infos:

Most interesting Screenshot:

Detection

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

Signatures

Found malware configuration
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)
Sigma detected: NanoCore
Yara detected AntiVM3
Detected Nanocore Rat
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
.NET source code contains very large strings
Machine Learning detection for dropped file
Executable has a suspicious name (potential lure to open the executable)
C2 URLs / IPs found in malware configuration
Uses schtasks.exe or at.exe to add and modify task schedules
Uses dynamic DNS services
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
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)
Contains functionality to call native functions
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 open a port and listen for incoming connection (possibly a backdoor)
Detected TCP or UDP traffic on non-standard ports
Binary contains a suspicious time stamp
Creates a process in suspended mode (likely to inject code)

Classification

Process Tree

  • System is w10x64
  • Purchase Order.exe (PID: 4948 cmdline: "C:\Users\user\Desktop\Purchase Order.exe" MD5: 3F4E18FA2E1404E2C8F7F7E58C0DAE4E)
    • schtasks.exe (PID: 2940 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sWTAwlQUDpm" /XML "C:\Users\user\AppData\Local\Temp\tmpFF67.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 3848 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • Purchase Order.exe (PID: 2840 cmdline: {path} MD5: 3F4E18FA2E1404E2C8F7F7E58C0DAE4E)
      • schtasks.exe (PID: 4664 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor" /xml "C:\Users\user\AppData\Local\Temp\tmp5DEB.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 5148 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • Purchase Order.exe (PID: 4576 cmdline: "C:\Users\user\Desktop\Purchase Order.exe" 0 MD5: 3F4E18FA2E1404E2C8F7F7E58C0DAE4E)
    • schtasks.exe (PID: 2960 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sWTAwlQUDpm" /XML "C:\Users\user\AppData\Local\Temp\tmp2DF9.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 4908 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "1.2.2.0", "Mutex": "97f187e8-a15c-4801-9810-760fe379", "Group": "Bllie", "Domain1": "billie4.ddns.net", "Domain2": "", "Port": 6272, "KeyboardLogging": "Enable", "RunOnStartup": "Disable", "RequestElevation": "Disable", "BypassUAC": "Enable", "ClearZoneIdentifier": "Disable", "ClearAccessControl": "Disable", "SetCriticalProcess": "Disable", "PreventSystemSleep": "Disable", "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
00000003.00000002.514093712.0000000004451000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    0000000E.00000000.290105146.0000000000402000.00000040.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0xff8d:$x1: NanoCore.ClientPluginHost
    • 0xffca:$x2: IClientNetworkHost
    • 0x13afd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    0000000E.00000000.290105146.0000000000402000.00000040.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      0000000E.00000000.290105146.0000000000402000.00000040.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
      • 0xfcf5:$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
      00000003.00000002.510612941.0000000001400000.00000004.00020000.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0x8ba5:$x1: NanoCore.ClientPluginHost
      • 0x8bd2:$x2: IClientNetworkHost
      Click to see the 71 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      3.2.Purchase Order.exe.5c30000.26.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0xe75:$x1: NanoCore.ClientPluginHost
      • 0xe8f:$x2: IClientNetworkHost
      3.2.Purchase Order.exe.5c30000.26.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xe75:$x2: NanoCore.ClientPluginHost
      • 0x1261:$s3: PipeExists
      • 0x1136:$s4: PipeCreated
      • 0xeb0:$s5: IClientLoggingHost
      3.2.Purchase Order.exe.3495c98.12.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0x6da5:$x1: NanoCore.ClientPluginHost
      • 0x6dd2:$x2: IClientNetworkHost
      3.2.Purchase Order.exe.3495c98.12.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0x6da5:$x2: NanoCore.ClientPluginHost
      • 0x7d74:$s2: FileCommand
      • 0xc776:$s4: PipeCreated
      • 0x6dbf:$s5: IClientLoggingHost
      14.0.Purchase Order.exe.400000.4.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0x1018d:$x1: NanoCore.ClientPluginHost
      • 0x101ca:$x2: IClientNetworkHost
      • 0x13cfd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe