PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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.

  TECHNICAL DETAILS

File Size: 1,159,616 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 10 Oct 2015

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.

Installation

This spyware drops the following copies of itself into the affected system:

  • %System%\wwtask.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other System Modifications

This spyware adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver

HKEY_CURRENT_USER\Software\Tz0\
BIOS

HKEY_LOCAL_MACHINE\SOFTWARE\Tz0\
Plugins\EMTask

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\SafeBoot\Minimal\
NetworkAgent

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\SafeBoot\Network\
NetworkAgent

HKEY_LOCAL_MACHINE\Software\Tz0\
BIOS

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver\t0_secc

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_macid = "ED46122B68D92852C094A6E46F"

HKEY_CURRENT_USER\Software\Tz0\
BIOS
SMBiosType = "PHYSMEM"

HKEY_CURRENT_USER\Software\Tz0\
BIOS
SMBios = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_macid = "30380C2D6EE7266CEA7FD9383A"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_s = "109139122142134090"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_deb = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_sp = "092083117112098103093104112108117140146140141126134076075117"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_sn = "144144141122140132071126145126"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_mut = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_mutp = "092083117112098103093104112108117140146140141126134076075117"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_mutt = "073"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_mutx = "073"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_tray = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_usrt = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_fpreset = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Tz0\
Plugins\EMTask
p_build = "1.0.0.20"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\NetworkAgent
ImagePath = "%System%\wwtask.exe -service"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\NetworkAgent
Description = "Manages objects protocols in the Network and Dial-Up synchronizations"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\NetworkAgent
DisplayName = "Network Agent Driver Tz0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_dlt = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_macid = "363E0A53B0A1EF1A380C2E6CF6"

HKEY_LOCAL_MACHINE\SOFTWARE\Tz0\
BIOS
SMBiosType = "PHYSMEM"

HKEY_LOCAL_MACHINE\SOFTWARE\Tz0\
BIOS
SMBios = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_macid = "141C283152C3C1C9481C3E5CE6"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_s = "140141122139128122141126"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_p = "077076078082074"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_rport = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_pdie = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_max = "3e7"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_ui = "074"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_pcrypt = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_pon = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_up = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_lvv = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_lvf = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_gtimer = "14997"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_comp = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_recp = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_shadow = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_lb = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_lc = "2"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_tray = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_exs = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_htm = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_fcnv = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_fct0 = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_secu = "074"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_sece = "069"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_sect = "3"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_secwa = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_secw = "4"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver
t0_secss = "500000000111000"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver\t0_secc
XT0 = "9"

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
NetworkAgentDriver\t0_secc
C0 = "{random characters}"

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.750

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

Delete this registry key

[ Learn More ]

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\SOFTWARE\Clients
    • NetworkAgentDriver
  • In HKEY_CURRENT_USER\Software\Tz0
    • BIOS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tz0\Plugins
    • EMTask
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal
    • NetworkAgent
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot\Network
    • NetworkAgent
  • In HKEY_LOCAL_MACHINE\Software\Tz0
    • BIOS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_secc

Step 3

Delete this registry value

[ Learn More ]

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\SOFTWARE\Clients\NetworkAgentDriver
    • t0_macid = "ED46122B68D92852C094A6E46F"
  • In HKEY_CURRENT_USER\Software\Tz0\BIOS
    • SMBiosType = "PHYSMEM"
  • In HKEY_CURRENT_USER\Software\Tz0\BIOS
    • SMBios = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_macid = "30380C2D6EE7266CEA7FD9383A"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_s = "109139122142134090"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_deb = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_sp = "092083117112098103093104112108117140146140141126134076075117"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_sn = "144144141122140132071126145126"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_mut = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_mutp = "092083117112098103093104112108117140146140141126134076075117"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_mutt = "073"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_mutx = "073"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_tray = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_usrt = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_fpreset = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tz0\Plugins\EMTask
    • p_build = "1.0.0.20"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NetworkAgent
    • ImagePath = "%System%\wwtask.exe -service"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NetworkAgent
    • Description = "Manages objects protocols in the Network and Dial-Up synchronizations"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NetworkAgent
    • DisplayName = "Network Agent Driver Tz0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_dlt = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_macid = "363E0A53B0A1EF1A380C2E6CF6"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tz0\BIOS
    • SMBiosType = "PHYSMEM"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tz0\BIOS
    • SMBios = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_macid = "141C283152C3C1C9481C3E5CE6"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_s = "140141122139128122141126"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_p = "077076078082074"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_rport = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_pdie = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_max = "3e7"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_ui = "074"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_pcrypt = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_pon = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_up = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_lvv = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_lvf = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_gtimer = "14997"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_comp = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_recp = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_shadow = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_lb = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_lc = "2"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_tray = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_exs = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_htm = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_fcnv = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_fct0 = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_secu = "074"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_sece = "069"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_sect = "3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_secwa = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_secw = "4"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver
    • t0_secss = "500000000111000"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver\t0_secc
    • XT0 = "9"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\NetworkAgentDriver\t0_secc
    • C0 = "{random characters}"

Step 4

Scan your computer with your Trend Micro product to delete files detected as TSPY_BANKER.YWNKD. 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.


Did this description help? Tell us how we did.