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Analysis Report 1kn1ejwPxi.exe

Overview

General Information

Sample Name:1kn1ejwPxi.exe
Analysis ID:319525
MD5:d4dc21771af067f1a4e1be14a06d9628
SHA1:4eceb759e8ce69e05bf0d4f634273ae9768b5561
SHA256:6e6132e3f3bc119adac878ba65475b581698e8dd7d2169f984bb5eb232f6b3c6
Tags:exeNanoCorenVpnRAT

Most interesting Screenshot:

Detection

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

Signatures

Detected Nanocore Rat
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Yara detected Nanocore RAT
.NET source code contains potential unpacker
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Antivirus or Machine Learning detection for unpacked file
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Contains long sleeps (>= 3 min)
Creates a DirectInput object (often for capturing keystrokes)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Drops PE files
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
IP address seen in connection with other malware
Installs a raw input device (often for capturing keystrokes)
Internet Provider seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
PE file contains strange resources
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Stores files to the Windows start menu directory
Uses code obfuscation techniques (call, push, ret)
Yara signature match

Classification

Startup

  • System is w10x64
  • 1kn1ejwPxi.exe (PID: 7064 cmdline: 'C:\Users\user\Desktop\1kn1ejwPxi.exe' MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • 1kn1ejwPxi.exe (PID: 5748 cmdline: C:\Users\user\Desktop\1kn1ejwPxi.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • 1kn1ejwPxi.exe (PID: 5844 cmdline: C:\Users\user\Desktop\1kn1ejwPxi.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • 1kn1ejwPxi.exe (PID: 6592 cmdline: C:\Users\user\Desktop\1kn1ejwPxi.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • 1kn1ejwPxi.exe (PID: 6516 cmdline: C:\Users\user\Desktop\1kn1ejwPxi.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
      • schtasks.exe (PID: 6672 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor' /xml 'C:\Users\user\AppData\Local\Temp\tmp9EB6.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 6932 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 6644 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor Task' /xml 'C:\Users\user\AppData\Local\Temp\tmpA1D4.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 6636 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • 1kn1ejwPxi.exe (PID: 6632 cmdline: C:\Users\user\Desktop\1kn1ejwPxi.exe 0 MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • 1kn1ejwPxi.exe (PID: 5340 cmdline: C:\Users\user\Desktop\1kn1ejwPxi.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
  • vlc.exe (PID: 7148 cmdline: 'C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\VideoLAN\vlc.exe' MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • vlc.exe (PID: 5364 cmdline: C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\VideoLAN\vlc.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • vlc.exe (PID: 5392 cmdline: C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\VideoLAN\vlc.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
  • dhcpmon.exe (PID: 5728 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 0 MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • dhcpmon.exe (PID: 5568 cmdline: C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
  • dhcpmon.exe (PID: 6212 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • dhcpmon.exe (PID: 5012 cmdline: C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
  • vlc.exe (PID: 6480 cmdline: 'C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\VideoLAN\vlc.exe' MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • vlc.exe (PID: 3588 cmdline: C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\VideoLAN\vlc.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • vlc.exe (PID: 6940 cmdline: C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\VideoLAN\vlc.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
    • vlc.exe (PID: 6928 cmdline: C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\VideoLAN\vlc.exe MD5: D4DC21771AF067F1A4E1BE14A06D9628)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"C2: ": ["185.140.53.132"], "Version: ": "NanoCore Client, Version=1.2.2.0"}

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000009.00000002.624204849.00000000071D0000.00000004.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0x5fee:$x1: NanoCore.ClientPluginHost
  • 0x602b:$x2: IClientNetworkHost
00000009.00000002.624204849.00000000071D0000.00000004.00000001.sdmpNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
  • 0x5fee:$x2: NanoCore.ClientPluginHost
  • 0x9441:$s4: PipeCreated
  • 0x6018:$s5: IClientLoggingHost
0000001B.00000002.530956930.0000000003F49000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    0000001B.00000002.530956930.0000000003F49000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0x435cd:$a: NanoCore
    • 0x43626:$a: NanoCore
    • 0x43663:$a: NanoCore
    • 0x436dc:$a: NanoCore
    • 0x56d87:$a: NanoCore
    • 0x56d9c:$a: NanoCore
    • 0x56dd1:$a: NanoCore
    • 0x6fd73:$a: NanoCore
    • 0x6fd88:$a: NanoCore
    • 0x6fdbd:$a: NanoCore
    • 0x4362f:$b: ClientPlugin
    • 0x4366c:$b: ClientPlugin
    • 0x43f6a:$b: ClientPlugin
    • 0x43f77:$b: ClientPlugin
    • 0x56b43:$b: ClientPlugin
    • 0x56b5e:$b: ClientPlugin
    • 0x56b8e:$b: ClientPlugin
    • 0x56da5:$b: ClientPlugin
    • 0x56dda:$b: ClientPlugin
    • 0x6fb2f:$b: ClientPlugin
    • 0x6fb4a:$b: ClientPlugin
    00000012.00000002.509910009.00000000040E1000.00000004.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0x146bd:$x1: NanoCore.ClientPluginHost
    • 0x146fa:$x2: IClientNetworkHost
    • 0x1822d:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    Click to see the 137 entries

    Unpacked PEs

    SourceRuleDescriptionAuthorStrings
    9.2.1kn1ejwPxi.exe.7130000.12.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0x2205:$x1: NanoCore.ClientPluginHost
    • 0x223e:$x2: IClientNetworkHost
    9.2.1kn1ejwPxi.exe.7130000.12.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
    • 0x2205:$x2: NanoCore.ClientPluginHost
    • 0x2320:$s4: PipeCreated
    • 0x221f:$s5: IClientLoggingHost
    9.2.1kn1ejwPxi.exe.7150000.14.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0x39eb:$x1: NanoCore.ClientPluginHost
    • 0x3a24:$x2: IClientNetworkHost
    9.2.1kn1ejwPxi.exe.7150000.14.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
    • 0x39eb:$x2: NanoCore.ClientPluginHost
    • 0x3b36:$s4: PipeCreated
    • 0x3a05:$s5: IClientLoggingHost
    9.2.1kn1ejwPxi.exe.7100000.9.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0x16e3:$x1: NanoCore.ClientPluginHost
    • 0x171c:$x2: IClientNetworkHost
    Click to see the 71 entries

    Sigma Overview

    System Summary:

    barindex
    Sigma detected: NanoCoreShow sources
    Source: File createdAuthor: Joe Security: Data: EventID: 11, Image: C:\Users\user\Desktop\1kn1ejwPxi.exe, ProcessId: 6516, TargetFilename: C:\Users\user\AppData\Roaming\D06ED635-68F6-4E9A-955C-4899F5F57B9A\run.dat
    Sigma detected: Scheduled temp file as task from temp locationShow sources
    Source: Process startedAuthor: Joe Secur