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Analysis Report 0CyK3Y7XBs


General Information

Sample Name:0CyK3Y7XBs (renamed file extension from none to exe)
Analysis ID:316985

Most interesting Screenshot:


HawkEye MailPassView
Range:0 - 100


Detected HawkEye 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)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Yara detected HawkEye Keylogger
Yara detected MailPassView
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Changes the view of files in windows explorer (hidden files and folders)
Contains functionality to detect sleep reduction / modifications
Contains functionality to log keystrokes (.Net Source)
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Maps a DLL or memory area into another process
May check the online IP address of the machine
Sample uses process hollowing technique
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file access)
Tries to steal Mail credentials (via file registry)
Writes to foreign memory regions
Yara detected WebBrowserPassView password recovery tool
AV process strings found (often used to terminate AV products)
Antivirus or Machine Learning detection for unpacked file
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Checks if the current process is being debugged
Contains capabilities to detect virtual machines
Contains functionality for read data from the clipboard
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
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 check the parent process ID (often done to detect debuggers and analysis systems)
Contains functionality to detect sandboxes (mouse cursor move detection)
Contains functionality to dynamically determine API calls
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 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)
Creates a window with clipboard capturing capabilities
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 inlined nop instructions (likely shell or obfuscated code)
Found potential string decryption / allocating functions
HTTP GET or POST without a user agent
IP address seen in connection with other malware
May check if the current machine is a sandbox (GetTickCount - Sleep)
May infect USB drives
May sleep (evasive loops) to hinder dynamic analysis
One or more processes crash
PE file contains executable resources (Code or Archives)
PE file contains strange resources
Queries disk information (often used to detect virtual machines)
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
Queries the volume information (name, serial number etc) of a device
Sample file is different than original file name gathered from version info
Stores large binary data to the registry
Tries to load missing DLLs
Uses SMTP (mail sending)
Uses code obfuscation techniques (call, push, ret)
Yara detected Keylogger Generic
Yara signature match



  • System is w10x64
  • 0CyK3Y7XBs.exe (PID: 7060 cmdline: 'C:\Users\user\Desktop\0CyK3Y7XBs.exe' MD5: 55E67D17646026B9AFBB19631DDC72F2)
    • 0CyK3Y7XBs.exe (PID: 7088 cmdline: 'C:\Users\user\Desktop\0CyK3Y7XBs.exe' MD5: 55E67D17646026B9AFBB19631DDC72F2)
      • Windows Update.exe (PID: 5780 cmdline: 'C:\Users\user\AppData\Roaming\Windows Update.exe' MD5: 55E67D17646026B9AFBB19631DDC72F2)
        • Windows Update.exe (PID: 1512 cmdline: 'C:\Users\user\AppData\Roaming\Windows Update.exe' MD5: 55E67D17646026B9AFBB19631DDC72F2)
          • dw20.exe (PID: 6448 cmdline: dw20.exe -x -s 2400 MD5: 8D10DA8A3E11747E51F23C882C22BBC3)
          • vbc.exe (PID: 6460 cmdline: C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext 'C:\Users\user\AppData\Local\Temp\holdermail.txt' MD5: C63ED21D5706A527419C9FBD730FFB2E)
          • vbc.exe (PID: 6536 cmdline: C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext 'C:\Users\user\AppData\Local\Temp\holderwb.txt' MD5: C63ED21D5706A527419C9FBD730FFB2E)
  • WindowsUpdate.exe (PID: 6552 cmdline: 'C:\Users\user\AppData\Roaming\WindowsUpdate.exe' MD5: 55E67D17646026B9AFBB19631DDC72F2)
    • WindowsUpdate.exe (PID: 6672 cmdline: 'C:\Users\user\AppData\Roaming\WindowsUpdate.exe' MD5: 55E67D17646026B9AFBB19631DDC72F2)
      • Windows Update.exe (PID: 6848 cmdline: 'C:\Users\user\AppData\Roaming\Windows Update.exe' MD5: 55E67D17646026B9AFBB19631DDC72F2)
        • Windows Update.exe (PID: 6836 cmdline: 'C:\Users\user\AppData\Roaming\Windows Update.exe' MD5: 55E67D17646026B9AFBB19631DDC72F2)
          • dw20.exe (PID: 6060 cmdline: dw20.exe -x -s 2508 MD5: 8D10DA8A3E11747E51F23C882C22BBC3)
          • vbc.exe (PID: 7124 cmdline: C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext 'C:\Users\user\AppData\Local\Temp\holdermail.txt' MD5: C63ED21D5706A527419C9FBD730FFB2E)
  • WindowsUpdate.exe (PID: 6788 cmdline: 'C:\Users\user\AppData\Roaming\WindowsUpdate.exe' MD5: 55E67D17646026B9AFBB19631DDC72F2)
    • WindowsUpdate.exe (PID: 6980 cmdline: 'C:\Users\user\AppData\Roaming\WindowsUpdate.exe' MD5: 55E67D17646026B9AFBB19631DDC72F2)
    • BackgroundTransferHost.exe (PID: 6980 cmdline: 'BackgroundTransferHost.exe' -ServerName:BackgroundTransferHost.1 MD5: 02BA81746B929ECC9DB6665589B68335)
  • cleanup

Malware Configuration

Threatname: HawkEye

{"Modules": ["WebBrowserPassView", "mailpv", "Mail PassView"], "Version": ""}

Yara Overview

Memory Dumps

00000007.00000002.374287427.0000000000400000.00000040.00000001.sdmpJoeSecurity_MailPassViewYara detected MailPassViewJoe Security
    0000000F.00000002.430013517.0000000002E7C000.00000004.00000001.sdmpJoeSecurity_HawkEyeYara detected HawkEye KeyloggerJoe Security
      0000000F.00000002.430013517.0000000002E7C000.00000004.00000001.sdmpHawkeyedetect HawkEye in memoryJPCERT/CC Incident Response Group
      • 0x26a0:$hawkstr1: HawkEye Keylogger
      • 0x20ec:$hawkstr2: Dear HawkEye Customers!
      • 0x221e:$hawkstr3: HawkEye Logger Details:
      0000000F.00000002.430031968.0000000002E82000.00000004.00000001.sdmpJoeSecurity_HawkEyeYara detected HawkEye KeyloggerJoe Security
        00000002.00000002.354417981.0000000000497000.00000040.00000001.sdmpRAT_HawkEyeDetects HawkEye RATKevin Breen <kevin@techanarchy.net>
        • 0x7b99b:$key: HawkEyeKeylogger
        • 0x7dc05:$salt: 099u787978786
        • 0x7bff8:$string1: HawkEye_Keylogger
        • 0x7ce37:$string1: HawkEye_Keylogger
        • 0x7db65:$string1: HawkEye_Keylogger
        • 0x7c3cd:$string2: holdermail.txt
        • 0x7c3ed:$string2: holdermail.txt
        • 0x7c30f:$string3: wallet.dat
        • 0x7c327:$string3: wallet.dat
        • 0x7c33d:$string3: wallet.dat
        • 0x7d729:$string4: Keylog Records
        • 0x7da41:$string4: Keylog Records
        • 0x7dc5d:$string5: do not script -->
        • 0x7b983:$string6: \pidloc.txt
        • 0x7ba11:$string7: BSPLIT
        • 0x7ba21:$string7: BSPLIT
        Click to see the 243 entries

        Unpacked PEs

        7.2.vbc.exe.400000.0.unpackJoeSecurity_MailPassViewYara detected MailPassViewJoe Security
          5.2.Windows Update.exe.2400000.3.unpackRAT_HawkEyeDetects HawkEye RATKevin Breen <kevin@techanarchy.net>
          • 0x7b8b3:$key: HawkEyeKeylogger
          • 0x7db1d:$salt: 099u787978786
          • 0x7bf10:$string1: HawkEye_Keylogger
          • 0x7cd4f:$string1: HawkEye_Keylogger
          • 0x7da7d:$string1: HawkEye_Keylogger
          • 0x7c2e5:$string2: holdermail.txt
          • 0x7c305:$string2: holdermail.txt
          • 0x7c227:$string3: wallet.dat
          • 0x7c23f:$string3: wallet.dat
          • 0x7c255:$string3: wallet.dat
          • 0x7d641:$string4: Keylog Records
          • 0x7d959:$string4: Keylog Records
          • 0x7db75:$string5: do not script -->
          • 0x7b89b:$string6: \pidloc.txt
          • 0x7b929:$string7: BSPLIT
          • 0x7b939:$string7: BSPLIT
          5.2.Windows Update.exe.2400000.3.unpackJoeSecurity_MailPassViewYara detected MailPassViewJoe Security
            5.2.Windows Update.exe.2400000.3.unpackJoeSecurity_HawkEyeYara detected HawkEye KeyloggerJoe Security
              5.2.Windows Update.exe.2400000.3.unpackJoeSecurity_WebBrowserPassViewYara detected WebBrowserPassView password recovery toolJoe Security