PTIGER
Ptiger, Pincav, PTig
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
PTIGER variants are backdoors that can perform various commands from remote malicious users. Some of the commands include collecting system information, logging keystrokes, and capturing screenshots. The stolen information could then be used for malicious schemes.
This malware connects to a command-and-control (C&C) server to send and receive information to a malicious user.
This backdoor executes commands from a remote malicious user, effectively compromising the affected system.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
Yes
Connects to URLs/IPs, Downloads files
Installation
This backdoor drops the following files:
- %System%\shell64.dll
- %User Temp%\WinWMI.dll
- %System%\WinWMI.dll
- %System%\packet64.dll
- %System%\qmgrxp.dll
- {malware path}\{malware file name}.dat
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
It drops the following copies of itself into the affected system:
- %System%\smss32.exe
- %System%\qmgrxp.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Its DLL component is injected to the following process(es):
- explorer.exe
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- PittyTiger
Other System Modifications
This backdoor modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Userinit = "%System%\userinit.exe,%System%\smss32.exe,"
(Note: The default value data of the said registry entry is %System%\userinit.exe,.)
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- Capture screen
- Connect to new C&C server
- Download file from C&C server
- Perform remote shell
- Update C&C server and port used
- Upload file to C&C server
Other Details
This backdoor connects to the following possibly malicious URL:
- http://{BLOCKED}.{BLOCKED}.221.126:443/FC001/{computer name}-{random string}
- http://{BLOCKED}.{BLOCKED}.221.126:80/FC001/{computer name}-{random string}
- http://{BLOCKED}.{BLOCKED}.221.126:8080/FC001/{computer name}-{random string}
- http://{BLOCKED}u.{BLOCKED}m.com.tw:443/FC001/{computer name}-{random string}
- http://{BLOCKED}u.{BLOCKED}m.com.tw:80/FC001/{computer name}-{random string}
- http://{BLOCKED}u.{BLOCKED}m.com.tw:8080/FC001/{computer name}-{random string}
- http://{BLOCKED}g.{BLOCKED}m.com.tw:443/FC001/{computer name}-{random string}
- http://{BLOCKED}g.{BLOCKED}m.com.tw:80/FC001/{computer name}-{random string}
- http://{BLOCKED}g.{BLOCKED}m.com.tw:8080/FC001/{computer name}-{random string}
- http://{BLOCKED}b.{BLOCKED}stnet.com.tw:443/FC001/{computer name}-{random string}
- http://{BLOCKED}r.{BLOCKED}com.tw/FC001/{computer name}-{random string}
- http://{BLOCKED}o.{BLOCKED}m.com.tw:443/FC001/{computer name}-{random string}
- http://{BLOCKED}.{BLOCKED}.209.18:443/FC001/{computer name}-{random string}
It deletes the initially executed copy of itself