SONAR.MavInject!g2

Discovered: January 24, 2019
Updated: January 24, 2019 7:14:18 AM
Type: Trojan, Virus
Infection Length: Varies
Systems Affected: Windows

SONAR.MavInject!g2 is a heuristic detection for files that uses Mavinject.exe to perform arbitrary code injection.

Recommendations

SCS encourages all users and administrators to adhere to the following basic security “best practices”:

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device’s visibility is set to “Hidden” so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to “Unauthorized”, requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.

Trojan.Formbook

Discovered: January 30, 2019
Updated: February 01, 2019 8:44:08 AM
Type: Trojan
Infection Length: Varies
Systems Affected: Windows

Trojan.Formbook is a Trojan horse that steals information from the compromised computer.

The threat may arrive on the compromised computer as an attachment to malicious spam emails, as a payload of W97M.Downloader , or through exploits.

When the Trojan is executed, it copies itself to either of the following locations:

  • %Temp%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe
  • %ProgramFiles%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe

The Trojan then creates any of the following registry entries:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\”[RANDOM CHARACTERS]” = “%Temp%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe”
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\”[RANDOM CHARACTERS]” = “%ProgramFiles%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe”
  • HKEY_LOCAL_MACHINE\Software\wow6432node\Microsoft\Windows\CurrentVersion\Run\”[RANDOM CHARACTERS]” = “%Temp%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe”
  • HKEY_LOCAL_MACHINE\Software\wow6432node\Microsoft\Windows\CurrentVersion\Run\”[RANDOM CHARACTERS]” = “%ProgramFiles%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe”

The Trojan also modifies the registry so it runs every time Windows starts.

The Trojan contains strong anti-analysis, anti-debugging, and anti-sandbox features.

Next, the Trojan steals credentials from the following browsers and hooks to them to monitor web login requests:

  • Chrome
  • Firefox
  • Thunderbird
  • Internet Explorer
  • Outlook
  • Windows Vault
  • Opera

The Trojan may also perform the following malicious activities on the compromised computer:

  • Steal user and system information
  • Monitor and log keystrokes
  • Take screenshots
  • Download and execute files returned by its command and control (C&C) server

The Trojan then saves the gathered information in the following locations:

  • %AppData%\[RANDOM FOLDER NAME]
  • %AppData%\[RANDOM FOLDER NAME]\<random_prefix1>log.ini
  • %AppData%\[RANDOM FOLDER NAME]\[RANDOM PREFIX]logrg.ini
  • %AppData%\[RANDOM FOLDER NAME]\[RANDOM PREFIX]logrf.ini
  • %AppData%\[RANDOM FOLDER NAME]\[RANDOM PREFIX]logrt.ini
  • %AppData%\[RANDOM FOLDER NAME]\[RANDOM PREFIX]logri.ini
  • %AppData%\[RANDOM FOLDER NAME]\[RANDOM PREFIX]logrc.ini
  • %AppData%\[RANDOM FOLDER NAME]\[RANDOM PREFIX]logrv.ini
  • %AppData%\[RANDOM FOLDER NAME]\[RANDOM PREFIX]logro.ini
  • %AppData%\[RANDOM FOLDER NAME]\[RANDOM PREFIX]logim.jpeg

Recommendations

SCS encourages all users and administrators to adhere to the following basic security “best practices”:

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device’s visibility is set to “Hidden” so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to “Unauthorized”, requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.

Infostealer.Rultazo!g4

Discovered: January 31, 2019
Updated: February 01, 2019 8:42:10 AM
Type: Trojan
Infection Length: Varies
Systems Affected: Windows

Infostealer.Rultazo!g4 is a heuristic detection used to detect threats associated with the Infostealer.Rultazo family of threats.

Infostealer.Rultazo!g4 is a heuristic detection used to detect threats associated with the Infostealer.Rultazo family of threats.

Files that are detected as Infostealer.Rultazo!g4 are considered malicious.

Recommendations

SCS encourages all users and administrators to adhere to the following basic security “best practices”:

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device’s visibility is set to “Hidden” so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to “Unauthorized”, requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.

Packed.Generic.542

Discovered: February 01, 2019
Updated: February 01, 2019 8:50:15 AM
Type: Trojan
Infection Length: Varies
Systems Affected: Windows

Packed.Generic.542 is a heuristic detection for files that may have been obfuscated or encrypted in order to conceal them from antivirus software.

A packer is a tool that compresses, encrypts, or obfuscates executable files. Malware authors often use packers to conceal threats from detection by antivirus software. Packed.Generic.542 detects a packer that is not known to be used for legitimate purposes.

Recommendations

SCS encourages all users and administrators to adhere to the following basic security “best practices”:

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device’s visibility is set to “Hidden” so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to “Unauthorized”, requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.

SONAR.SuspBeh!gen670

Discovered: January 08, 2019
Updated: January 08, 2019 3:35:28 AM
Type: Trojan, Virus
Infection Length: Varies
Systems Affected: Windows

SONAR.SuspBeh!gen670 is a heuristic detection used to detect suspicious modifications to system settings.Recommendations

Secnic Consultancy Service (SCS) encourages all users and administrators to adhere to the following basic security “best practices”:

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device’s visibility is set to “Hidden” so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to “Unauthorized”, requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.