Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
Jens Frodesen CV.exe

Overview

General Information

Sample Name:Jens Frodesen CV.exe
Analysis ID:711362
MD5:89197e451346ed5a3ba154f394948de7
SHA1:0e9d39ec84881ca095a9c1400d64ec586e983402
SHA256:dbab1bf30e571bddf1c21a19bedebffd5a348145ea76abddc34a5172df49aa3b
Tags:exeNanoCoreRAT
Infos:

Detection

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

Signatures

Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Sigma detected: NanoCore
Yara detected AntiVM3
Detected Nanocore Rat
Sigma detected: Scheduled temp file as task from temp location
Antivirus detection for URL or domain
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Yara detected Nanocore RAT
Snort IDS alert for network traffic
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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 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)
Detected potential crypto function
Sample execution stops while process was sleeping (likely an evasion)
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)
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
Detected TCP or UDP traffic on non-standard ports
Creates a process in suspended mode (likely to inject code)

Classification

Process Tree

  • System is w10x64
  • Jens Frodesen CV.exe (PID: 2932 cmdline: "C:\Users\user\Desktop\Jens Frodesen CV.exe" MD5: 89197E451346ED5A3BA154F394948DE7)
    • schtasks.exe (PID: 5452 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LrSEeB" /XML "C:\Users\user\AppData\Local\Temp\tmp476F.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 5320 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • Jens Frodesen CV.exe (PID: 5344 cmdline: {path} MD5: 89197E451346ED5A3BA154F394948DE7)
      • schtasks.exe (PID: 4188 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor" /xml "C:\Users\user\AppData\Local\Temp\tmp7194.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 2600 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 6072 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor Task" /xml "C:\Users\user\AppData\Local\Temp\tmp75AC.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 5556 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • Jens Frodesen CV.exe (PID: 244 cmdline: "C:\Users\user\Desktop\Jens Frodesen CV.exe" 0 MD5: 89197E451346ED5A3BA154F394948DE7)
    • schtasks.exe (PID: 5080 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LrSEeB" /XML "C:\Users\user\AppData\Local\Temp\tmpBFFB.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 5552 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • dhcpmon.exe (PID: 4320 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" 0 MD5: 89197E451346ED5A3BA154F394948DE7)
    • schtasks.exe (PID: 5564 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LrSEeB" /XML "C:\Users\user\AppData\Local\Temp\tmpC1DF.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 5200 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • dhcpmon.exe (PID: 3104 cmdline: {path} MD5: 89197E451346ED5A3BA154F394948DE7)
  • dhcpmon.exe (PID: 988 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" MD5: 89197E451346ED5A3BA154F394948DE7)
    • schtasks.exe (PID: 5524 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LrSEeB" /XML "C:\Users\user\AppData\Local\Temp\tmpE91E.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 5628 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • dhcpmon.exe (PID: 5788 cmdline: {path} MD5: 89197E451346ED5A3BA154F394948DE7)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"Version": "1.2.2.0", "Mutex": "fba1bbc6-2cc8-4c94-b6c0-dda5a12f", "Group": "Default", "Domain1": "brightnano1.ddns.net", "Domain2": "", "Port": 1989, "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 Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000003.00000002.544223992.0000000005DD0000.00000004.08000000.00040000.00000000.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0x2205:$x1: NanoCore.ClientPluginHost
  • 0x223e:$x2: IClientNetworkHost
00000003.00000002.544223992.0000000005DD0000.00000004.08000000.00040000.00000000.sdmpNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
  • 0x2205:$x2: NanoCore.ClientPluginHost
  • 0x2320:$s4: PipeCreated
  • 0x221f:$s5: IClientLoggingHost
00000003.00000002.544223992.0000000005DD0000.00000004.08000000.00040000.00000000.sdmpMALWARE_Win_NanoCoreDetects NanoCoreditekSHen
  • 0x227f:$x2: NanoCore.ClientPlugin
  • 0x2205:$x3: NanoCore.ClientPluginHost
  • 0x2295:$i3: IClientNetwork
  • 0x221f:$i6: IClientLoggingHost
  • 0x223e:$i7: IClientNetworkHost
  • 0x1f9f:$s1: ClientPlugin
  • 0x2288:$s1: ClientPlugin
00000003.00000002.544223992.0000000005DD0000.00000004.08000000.00040000.00000000.sdmpWindows_Trojan_Nanocore_d8c4e3c5unknownunknown
  • 0x2205:$a1: NanoCore.ClientPluginHost
  • 0x227f:$a2: NanoCore.ClientPlugin
  • 0x29a0:$b7: LogClientException
  • 0x221f:$b9: IClientLoggingHost
00000003.00000002.548893461.00000000070B0000.00000004.08000000.00040000.00000000.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0x350b:$x1: NanoCore.ClientPluginHost
  • 0x3525:$x2: IClientNetworkHost