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Windows Analysis Report
remittance.exe

Overview

General Information

Sample Name:remittance.exe
Analysis ID:708238
MD5:31c5c19e5cbf0993baeef892e8f73ada
SHA1:3f39dd3802f34e7f0b8d307a5aa31daac779c3c8
SHA256:b9b9fa184afcfe0808c76a42a44a22e960d0283cf763c120be371122d0de8174
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
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
.NET source code contains very large strings
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
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
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 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
PE file contains strange resources
Drops PE files
Detected TCP or UDP traffic on non-standard ports
Creates a process in suspended mode (likely to inject code)

Classification

  • System is w10x64
  • remittance.exe (PID: 5568 cmdline: "C:\Users\user\Desktop\remittance.exe" MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
    • schtasks.exe (PID: 5292 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgSBwlYTdt" /XML "C:\Users\user\AppData\Local\Temp\tmpAD34.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 5264 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • remittance.exe (PID: 5320 cmdline: {path} MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
      • schtasks.exe (PID: 4656 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor" /xml "C:\Users\user\AppData\Local\Temp\tmpB828.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 1396 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 2800 cmdline: schtasks.exe" /create /f /tn "DHCP Monitor Task" /xml "C:\Users\user\AppData\Local\Temp\tmpC057.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 424 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • remittance.exe (PID: 5408 cmdline: C:\Users\user\Desktop\remittance.exe 0 MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
    • schtasks.exe (PID: 4176 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgSBwlYTdt" /XML "C:\Users\user\AppData\Local\Temp\tmp264C.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 2880 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • remittance.exe (PID: 4656 cmdline: {path} MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
  • dhcpmon.exe (PID: 3636 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" 0 MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
    • schtasks.exe (PID: 5176 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgSBwlYTdt" /XML "C:\Users\user\AppData\Local\Temp\tmp4136.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 5268 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • dhcpmon.exe (PID: 5040 cmdline: {path} MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
    • dhcpmon.exe (PID: 4712 cmdline: {path} MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
    • dhcpmon.exe (PID: 5640 cmdline: {path} MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
    • dhcpmon.exe (PID: 6020 cmdline: {path} MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
  • dhcpmon.exe (PID: 1368 cmdline: "C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe" MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
    • schtasks.exe (PID: 2248 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgSBwlYTdt" /XML "C:\Users\user\AppData\Local\Temp\tmp5403.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 3992 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • dhcpmon.exe (PID: 4688 cmdline: {path} MD5: 31C5C19E5CBF0993BAEEF892E8F73ADA)
  • cleanup
{"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>$(Arg0)</Arguments>\r\n    </Exec>\r\n  </Actions>\r\n</Task"}
SourceRuleDescriptionAuthorStrings
00000004.00000002.547330853.0000000005F00000.00000004.08000000.00040000.00000000.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0x5b99:$x1: NanoCore.ClientPluginHost
  • 0x5bb3:$x2: IClientNetworkHost
00000004.00000002.547330853.0000000005F00000.00000004.08000000.00040000.00000000.sdmpNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
  • 0x5b99:$x2: NanoCore.ClientPluginHost
  • 0x6bce:$s4: PipeCreated
  • 0x5b86:$s5: IClientLoggingHost
00000004.00000002.547330853.0000000005F00000.00000004.08000000.00040000.00000000.sdmpMALWARE_Win_NanoCoreDetects NanoCoreditekSHen
  • 0x5b70:$x2: NanoCore.ClientPlugin
  • 0x5b99:$x3: NanoCore.ClientPluginHost
  • 0x5b61:$i3: IClientNetwork
  • 0x5b86:$i6: IClientLoggingHost
  • 0x5bb3:$i7: IClientNetworkHost
  • 0x59d4:$s1: ClientPlugin
  • 0x5b79:$s1: ClientPlugin
  • 0x5e84:$s2: EndPoint
  • 0x5e8d:$s3: IPAddress
  • 0x5e97:$s4: IPEndPoint
00000004.00000002.547330853.0000000005F00000.00000004.08000000.00040000.00000000.sdmpWindows_Trojan_Nanocore_d8c4e3c5unknownunknown
  • 0x5b99:$a1: NanoCore.ClientPluginHost
  • 0x5b70:$a2: NanoCore.ClientPlugin
  • 0x5b86:$b9: IClientLoggingHost
00000004.00000003.322686052.00000000063EB000.00000004.00000800.00020000.00000000.sdmpWindows_Trojan_Nanocore_d8c4e3c5unknownunknown
  • 0x1ad4:$a1: NanoCore.ClientPluginHost
  • 0x1aaf:$a2: NanoCore.ClientPlugin
  • 0x1ac5:$b4: IClientAppHost
  • 0x5fb4:$b7: LogClientException
  • 0x1afe:$b9: IClientLoggingHost