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Windows Analysis Report FYrMKmDjFi.exe

Overview

General Information

Sample Name:FYrMKmDjFi.exe
Analysis ID:500510
MD5:f76bc0e1dd77808d3668b3a169155dec
SHA1:d4770ddfa3bff74a0b9c00d6acecc87d60212fe1
SHA256:34acd51df743b093c9eda93ebf46db0095fe2bdd4ee58d18c65e8914790f337d
Tags:exeNanoCore
Infos:

Most interesting Screenshot:

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
Detected Nanocore Rat
Yara detected Nanocore RAT
Writes to foreign memory regions
Machine Learning detection for sample
Allocates memory in foreign processes
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
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 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)
HTTP GET or POST without a user agent
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
Drops PE files
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
  • FYrMKmDjFi.exe (PID: 6504 cmdline: 'C:\Users\user\Desktop\FYrMKmDjFi.exe' MD5: F76BC0E1DD77808D3668B3A169155DEC)
    • FYrMKmDjFi.exe (PID: 4324 cmdline: C:\Users\user\AppData\Local\Temp\FYrMKmDjFi.exe MD5: F76BC0E1DD77808D3668B3A169155DEC)
      • schtasks.exe (PID: 7032 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor' /xml 'C:\Users\user\AppData\Local\Temp\tmp563.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 7120 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 6416 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor Task' /xml 'C:\Users\user\AppData\Local\Temp\tmp8B0.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 6620 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • FYrMKmDjFi.exe (PID: 6112 cmdline: C:\Users\user\AppData\Local\Temp\FYrMKmDjFi.exe 0 MD5: F76BC0E1DD77808D3668B3A169155DEC)
    • FYrMKmDjFi.exe (PID: 6816 cmdline: C:\Users\user\AppData\Local\Temp\FYrMKmDjFi.exe MD5: F76BC0E1DD77808D3668B3A169155DEC)
  • dhcpmon.exe (PID: 6664 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 0 MD5: F76BC0E1DD77808D3668B3A169155DEC)
    • dhcpmon.exe (PID: 4700 cmdline: C:\Users\user\AppData\Local\Temp\dhcpmon.exe MD5: F76BC0E1DD77808D3668B3A169155DEC)
  • dhcpmon.exe (PID: 6916 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' MD5: F76BC0E1DD77808D3668B3A169155DEC)
    • dhcpmon.exe (PID: 5656 cmdline: C:\Users\user\AppData\Local\Temp\dhcpmon.exe MD5: F76BC0E1DD77808D3668B3A169155DEC)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
0000000D.00000002.358733206.000000000399C000.00000004.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0x10165:$x1: NanoCore.ClientPluginHost
  • 0x101a2:$x2: IClientNetworkHost
  • 0x13cd5:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
0000000D.00000002.358733206.000000000399C000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    0000000D.00000002.358733206.000000000399C000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0xfecd:$a: NanoCore
    • 0xfedd:$a: NanoCore
    • 0x10111:$a: NanoCore
    • 0x10125:$a: NanoCore
    • 0x10165:$a: NanoCore
    • 0xff2c:$b: ClientPlugin
    • 0x1012e:$b: ClientPlugin
    • 0x1016e:$b: ClientPlugin
    • 0x10053:$c: ProjectData
    • 0x10a5a:$d: DESCrypto
    • 0x18426:$e: KeepAlive
    • 0x16414:$g: LogClientMessage
    • 0x1260f:$i: get_Connected
    • 0x10d90:$j: #=q
    • 0x10dc0:$j: #=q
    • 0x10ddc:$j: #=q
    • 0x10e0c:$j: #=q
    • 0x10e28:$j: #=q
    • 0x10e44:$j: #=q
    • 0x10e74:$j: #=q
    • 0x10e90:$j: #=q
    0000000F.00000002.376193439.0000000000402000.00000040.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
    • 0xff8d:$x1: NanoCore.ClientPluginHost
    • 0xffca:$x2: IClientNetworkHost
    • 0x13afd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
    0000000F.00000002.376193439.0000000000402000.00000040.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      Click to see the 95 entries

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      0.2.FYrMKmDjFi.exe.3dfce00.3.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
      • 0x1018d:$x1: NanoCore.ClientPluginHost
      • 0x101ca:$x2: IClientNetworkHost
      • 0x13cfd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
      0.2.FYrMKmDjFi.exe.3dfce00.3.raw.unpackNanocore_RAT_Feb18_1Detects Nanocore RATFlorian Roth
      • 0xff05:$x1: NanoCore Client.exe
      • 0x1018d:$x2: NanoCore.ClientPluginHost
      • 0x117c6:$s1: PluginCommand
      • 0x117ba:$s2: FileCommand
      • 0x1266b:$s3: PipeExists
      • 0x18422:$s4: PipeCreated
      • 0x101b7:$s5: IClientLoggingHost
      0.2.FYrMKmDjFi.exe.3dfce00.3.raw.unpackJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
        0.2.FYrMKmDjFi.exe.3dfce00.3.raw.unpackNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
        • 0xfef5:$a: NanoCore
        • 0xff05:$a: NanoCore
        • 0x10139:$a: NanoCore
        • 0x1014d:$a: NanoCore
        • 0x1018d:$a: NanoCore
        • 0xff54:$b: ClientPlugin
        • 0x10156:$b: ClientPlugin
        • 0x10196:$b: ClientPlugin
        • 0x1007b:$c: ProjectData
        • 0x10a82:$d: DESCrypto
        • 0x1844e:$e: KeepAlive
        • 0x1643c:$g: LogClientMessage
        • 0x12637:$i: get_Connected
        • 0x10db8:$j: #=q
        • 0x10de8:$j: #=q
        • 0x10e04:$j: #=q
        • 0x10e34:$j: #=q
        • 0x10e50:$j: #=q
        • 0x10e6c:$j: #=q
        • 0x10e9c:$j: #=q
        • 0x10eb8:$j: #=q
        0.2.FYrMKmDjFi.exe.2d83754.1.raw.unpackNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
        • 0x1018d:$x1: NanoCore.ClientPluginHost
        • 0x101ca:$x2: IClientNetworkHost
        • 0x13cfd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe