ALIASES:

Virus:Win32/Taris (Microsoft); ERROR (McAfee); W32.HLLP.Taris (Symantec); Virus.Win32.HLLP.Taris.a (Kaspersky); ERROR (Sunbelt); Win32/Taris (AVG)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan 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: 41,984 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 11 Jul 2013

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other System Modifications

This Trojan deletes the following files:

  • {malware path and file name}.sht.exe
  • {malware path and file name}.###

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_c = "CSCFlags=0,MaxUses=4294967295,Path=%System Root%\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_d = "CSCFlags=0,MaxUses=4294967295,Path=d:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_e = "CSCFlags=0,MaxUses=4294967295,Path=e:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_f = "CSCFlags=0,MaxUses=4294967295,Path=f:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_g = "CSCFlags=0,MaxUses=4294967295,Path=g:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_h = "CSCFlags=0,MaxUses=4294967295,Path=h:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_i = "CSCFlags=0,MaxUses=4294967295,Path=i:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_j = "CSCFlags=0,MaxUses=4294967295,Path=j:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_k = "CSCFlags=0,MaxUses=4294967295,Path=k:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_l = "CSCFlags=0,MaxUses=4294967295,Path=l:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_m = "CSCFlags=0,MaxUses=4294967295,Path=m:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_n = "CSCFlags=0,MaxUses=4294967295,Path=n:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_o = "CSCFlags=0,MaxUses=4294967295,Path=o:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_p = "CSCFlags=0,MaxUses=4294967295,Path=p:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_q = "CSCFlags=0,MaxUses=4294967295,Path=q:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_r = "CSCFlags=0,MaxUses=4294967295,Path=r:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_s = "CSCFlags=0,MaxUses=4294967295,Path=s:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_t = "CSCFlags=0,MaxUses=4294967295,Path=t:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_u = "CSCFlags=0,MaxUses=4294967295,Path=u:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_v = "CSCFlags=0,MaxUses=4294967295,Path=v:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_w = "CSCFlags=0,MaxUses=4294967295,Path=w:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_x = "CSCFlags=0,MaxUses=4294967295,Path=x:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_y = "CSCFlags=0,MaxUses=4294967295,Path=y:\,Permissions=0,Remark=,Type=0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\Shares
Disk_z = "CSCFlags=0,MaxUses=4294967295,Path=z:\,Permissions=0,Remark=,Type=0"

Dropping Routine

This Trojan drops the following files:

  • {malware path and file name}.sht.exe

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.300

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 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\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_c = "CSCFlags=0,MaxUses=4294967295,Path=%System Root%\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_d = "CSCFlags=0,MaxUses=4294967295,Path=d:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_e = "CSCFlags=0,MaxUses=4294967295,Path=e:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_f = "CSCFlags=0,MaxUses=4294967295,Path=f:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_g = "CSCFlags=0,MaxUses=4294967295,Path=g:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_h = "CSCFlags=0,MaxUses=4294967295,Path=h:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_i = "CSCFlags=0,MaxUses=4294967295,Path=i:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_j = "CSCFlags=0,MaxUses=4294967295,Path=j:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_k = "CSCFlags=0,MaxUses=4294967295,Path=k:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_l = "CSCFlags=0,MaxUses=4294967295,Path=l:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_m = "CSCFlags=0,MaxUses=4294967295,Path=m:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_n = "CSCFlags=0,MaxUses=4294967295,Path=n:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_o = "CSCFlags=0,MaxUses=4294967295,Path=o:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_p = "CSCFlags=0,MaxUses=4294967295,Path=p:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_q = "CSCFlags=0,MaxUses=4294967295,Path=q:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_r = "CSCFlags=0,MaxUses=4294967295,Path=r:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_s = "CSCFlags=0,MaxUses=4294967295,Path=s:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_t = "CSCFlags=0,MaxUses=4294967295,Path=t:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_u = "CSCFlags=0,MaxUses=4294967295,Path=u:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_v = "CSCFlags=0,MaxUses=4294967295,Path=v:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_w = "CSCFlags=0,MaxUses=4294967295,Path=w:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_x = "CSCFlags=0,MaxUses=4294967295,Path=x:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_y = "CSCFlags=0,MaxUses=4294967295,Path=y:\,Permissions=0,Remark=,Type=0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\Shares
    • Disk_z = "CSCFlags=0,MaxUses=4294967295,Path=z:\,Permissions=0,Remark=,Type=0"

Step 3

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • {malware path and file name}.sht.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as PE_TARIS.A-O. 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.

Step 5

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • {malware path and file name}.sht.exe
  • {malware path and file name}.###


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