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Analysis Report Bank Swift_7312020_PDF.exe

Overview

General Information

Sample Name:Bank Swift_7312020_PDF.exe
Analysis ID:255351
MD5:af2b7dc34bb7a628d97a909ae54159a1
SHA1:99fe057c3bc249bcc23be977c5fc694eeb437566
SHA256:93e44f3a49647573e0de42b29d80a9ce0af5cb879417e6a3f6a238d88979c662

Most interesting Screenshot:

Detection

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

Signatures

Detected Nanocore Rat
Detected unpacking (changes PE section rights)
Detected unpacking (creates a PE file in dynamic memory)
Detected unpacking (overwrites its own PE header)
Found malware configuration
Malicious sample detected (through community Yara rule)
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Yara detected Nanocore RAT
.NET source code contains potential unpacker
Contains functionality to detect sleep reduction / modifications
Hides that the sample has been downloaded from the Internet (zone.identifier)
Initial sample is a PE file and has a suspicious name
Machine Learning detection for dropped file
Machine Learning detection for sample
Maps a DLL or memory area into another process
Uses schtasks.exe or at.exe to add and modify task schedules
Checks if the current process is being debugged
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to check if a window is minimized (may be used to check if an application is visible)
Contains functionality to detect sandboxes (mouse cursor move detection)
Contains functionality to dynamically determine API calls
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Contains functionality to query CPU information (cpuid)
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Contains functionality to read the clipboard data
Contains functionality to record screenshots
Contains functionality to retrieve information about pressed keystrokes
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
Extensive use of GetProcAddress (often used to hide API calls)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found potential string decryption / allocating functions
Installs a raw input device (often for capturing keystrokes)
May sleep (evasive loops) to hinder dynamic analysis
PE file contains strange resources
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Uses code obfuscation techniques (call, push, ret)
Yara signature match

Classification

Startup

  • System is w10x64
  • Bank Swift_7312020_PDF.exe (PID: 7008 cmdline: 'C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe' MD5: AF2B7DC34BB7A628D97A909AE54159A1)
    • Bank Swift_7312020_PDF.exe (PID: 7064 cmdline: 'C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe' MD5: AF2B7DC34BB7A628D97A909AE54159A1)
      • schtasks.exe (PID: 7116 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor' /xml 'C:\Users\user\AppData\Local\Temp\tmpFBA9.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 7124 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • schtasks.exe (PID: 4904 cmdline: 'schtasks.exe' /create /f /tn 'DHCP Monitor Task' /xml 'C:\Users\user\AppData\Local\Temp\tmpFF92.tmp' MD5: 15FF7D8324231381BAD48A052F85DF04)
        • conhost.exe (PID: 4132 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • Bank Swift_7312020_PDF.exe (PID: 7076 cmdline: 'C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe' 2 7064 6485765 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
  • Bank Swift_7312020_PDF.exe (PID: 6188 cmdline: 'C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe' 0 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
    • Bank Swift_7312020_PDF.exe (PID: 4508 cmdline: 'C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe' 0 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
    • Bank Swift_7312020_PDF.exe (PID: 4572 cmdline: 'C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe' 2 4508 6491062 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
      • Bank Swift_7312020_PDF.exe (PID: 476 cmdline: C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe MD5: AF2B7DC34BB7A628D97A909AE54159A1)
        • Bank Swift_7312020_PDF.exe (PID: 6916 cmdline: C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe MD5: AF2B7DC34BB7A628D97A909AE54159A1)
        • Bank Swift_7312020_PDF.exe (PID: 7120 cmdline: 'C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe' 2 6916 6505203 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
          • Bank Swift_7312020_PDF.exe (PID: 1228 cmdline: C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe MD5: AF2B7DC34BB7A628D97A909AE54159A1)
            • Bank Swift_7312020_PDF.exe (PID: 6300 cmdline: C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe MD5: AF2B7DC34BB7A628D97A909AE54159A1)
            • Bank Swift_7312020_PDF.exe (PID: 3984 cmdline: 'C:\Users\user\Desktop\Bank Swift_7312020_PDF.exe' 2 6300 6523000 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
  • dhcpmon.exe (PID: 5488 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 0 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
    • dhcpmon.exe (PID: 4436 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 0 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
    • dhcpmon.exe (PID: 5708 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 2 4436 6491437 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
      • dhcpmon.exe (PID: 5968 cmdline: C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe MD5: AF2B7DC34BB7A628D97A909AE54159A1)
        • dhcpmon.exe (PID: 3316 cmdline: C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe MD5: AF2B7DC34BB7A628D97A909AE54159A1)
        • dhcpmon.exe (PID: 5884 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 2 3316 6506640 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
          • dhcpmon.exe (PID: 5596 cmdline: C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe MD5: AF2B7DC34BB7A628D97A909AE54159A1)
            • dhcpmon.exe (PID: 6712 cmdline: C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe MD5: AF2B7DC34BB7A628D97A909AE54159A1)
  • dhcpmon.exe (PID: 6628 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' MD5: AF2B7DC34BB7A628D97A909AE54159A1)
    • dhcpmon.exe (PID: 6588 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' MD5: AF2B7DC34BB7A628D97A909AE54159A1)
    • dhcpmon.exe (PID: 6668 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 2 6588 6501859 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
      • dhcpmon.exe (PID: 2016 cmdline: C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe MD5: AF2B7DC34BB7A628D97A909AE54159A1)
        • dhcpmon.exe (PID: 1828 cmdline: C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe MD5: AF2B7DC34BB7A628D97A909AE54159A1)
        • dhcpmon.exe (PID: 6436 cmdline: 'C:\Program Files (x86)\DHCP Monitor\dhcpmon.exe' 2 1828 6513843 MD5: AF2B7DC34BB7A628D97A909AE54159A1)
  • cleanup

Malware Configuration

Threatname: NanoCore

{"C2: ": ["79.134.225.71"], "Version: ": "NanoCore Client, Version=1.2.2.0"}

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
0000000A.00000002.276295700.0000000000992000.00000040.00000001.sdmpNanocore_RAT_Gen_2Detetcs the Nanocore RATFlorian Roth
  • 0xff8d:$x1: NanoCore.ClientPluginHost
  • 0xffca:$x2: IClientNetworkHost
  • 0x13afd:$x3: #=qjgz7ljmpp0J7FvL9dmi8ctJILdgtcbw8JYUc6GC8MeJ9B11Crfg2Djxcf0p8PZGe
0000000A.00000002.276295700.0000000000992000.00000040.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
    0000000A.00000002.276295700.0000000000992000.00000040.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
    • 0xfcf5:$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
    0000000B.00000002.280204491.0000000003891000.00000004.00000001.sdmpJoeSecurity_NanocoreYara detected Nanocore RATJoe Security
      0000000B.00000002.280204491.0000000003891000.00000004.00000001.sdmpNanoCoreunknown Kevin Breen <kevin@techanarchy.net>
      • 0x49a25:$a: NanoCore
      • 0x49a7e:$a: NanoCore
      • 0x49abb:$a: NanoCore
      • 0x49b34:$a: NanoCore
      • 0x5d1df:$a: NanoCore
      • 0x5d1f4:$a: NanoCore
      • 0x5d229:$a: NanoCore
      • 0x761b3:$a: NanoCore
      • 0x761c8:$a: NanoCore
      • 0x761fd:$a: NanoCore
      • 0x49a87:$b: ClientPlugin
      • 0x49ac4:$b: ClientPlugin
      • 0x4a3c2:$b: ClientPlugin
      • 0x4a3cf:$b: ClientPlugin
      • 0x5cf9b:$b: ClientPlugin
      • 0x5cfb6:$b: ClientPlugin
      • 0x5cfe6:$b: ClientPlugin
      • 0x5d1fd:$b: ClientPlugin
      • 0x5d232:$b: ClientPlugin
      • 0x75f6f:$b: ClientPlugin
      • 0x75f8a:$b: ClientPlugin