➔
search
✕

TROJ_GLOBYY.SLO

September 30, 2013
 Analysis by: Rika Joi Gregorio
 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

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.

It does not have any downloading capability.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

File Size:

46,080 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

18 Sep 2013

Payload:

Drops files

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.

Installation

This Trojan drops the following component file(s):

  • %System%\appmgmts32.dll - detected as PTCH_GLOBYY.SLO

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

Other System Modifications

This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
{random}\Btr

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
{random}
"AppMgmt" = "AppMgmt"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
{random}
id = "1B6E1C566BSA20F9"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
{random}
ie = "{malware path and file name}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
{random}
it = "{random value}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
{random}\Btr
Run = "{binary data}"

Download Routine

This Trojan does not have any downloading capability.

Information Theft

This Trojan does not have any information-stealing capability.

NOTES:

It registers its dropped component as a system service to ensure its automatic execution at every system startup. It does this by modifying the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AppMgmt
Start = "2"
Start = "3"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AppMgmt
ServiceDll = "%System%\appmgmts32.dll"
ServiceDll = "%System%\appmgmts.dll"

It checks for certain services if running on the system by querying this registry:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Svchost
netsvcs

The following are the services this malware checks:

  • 6to4
  • AppMgmt

It also checks for the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AppMgmt
DependOnService
Start

It does not have rootkit capabilities.

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

10.304.08

FIRST VSAPI PATTERN DATE:

28 Sep 2013

VSAPI OPR PATTERN File:

10.305.00

VSAPI OPR PATTERN Date:

28 Sep 2013

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

Remove malware/grayware files dropped/downloaded by TROJ_GLOBYY.SLO

  • PTCH_GLOBYY.SLO

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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\Microsoft\{random}
    • Btr

Step 5

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AppMgmt
    • From: Start = "2"
      To: Start = 3
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AppMgmt
    • From: ServiceDll = "%System%\appmgmts32.dll"
      To: ServiceDll = "%System%\appmgmts.dll"

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_GLOBYY.SLO. 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.