Analysis by: Maureen Reyes

ALIASES:

Trojan:Win32/Dynamer!rfn (Microsoft), W32/Socelars.G!tr.spy (Fortinet), a variant of Win32/Spy.Socelars.G trojan (ESET-NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan Spy 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: 334,848 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 21 May 2018

Arrival Details

This Trojan Spy 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 Spy drops the following files:

  • %AppDataLocal%\XService\XService.dll

(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It creates the following folders:

  • %AppDataLocal%\XService

(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Autostart Technique

This Trojan Spy adds and runs the following services:

  • MicroService

Other System Modifications

This Trojan Spy adds the following registry keys:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
services\MicroService

It adds the following registry entries:

HKCU\Software\{6D187CC8-35BD-47F6-8760-D406AA1927B1}
Name = SetUpCompany

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows NT\CurrentVersion\Svchost
MicroServiceGroup = {Hex Data}

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
services\MicroService\Parameters
ServiceDll = %AppDataLocal%\XService\XService.dll

Other Details

This Trojan Spy connects to the following possibly malicious URL:

  • {BLOCKED}i.{BLOCKED}i-api.com
  • {BLOCKED}n.{BLOCKED}wn.com
  • {BLOCKED}i.{BLOCKED}jiekou.com

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.264.08
FIRST VSAPI PATTERN DATE: 21 May 2018
VSAPI OPR PATTERN File: 14.265.00
VSAPI OPR PATTERN Date: 22 May 2018

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Disable this malware service

[ Learn More ]
    • MicroService

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.

  • HKEY_LOCAL_MACHINE\System\CurrentControlSet\services\MicroService

Step 5

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\CurrentControlSet\services\MicroService\Parameters
    • ServiceDll = "%AppDataLocal%\XService\XService.dll"
  • In HKEY_CURRENT_USER\Software\{6D187CC8-35BD-47F6-8760-D406AA1927B1}
    • Name = "SetUpCompany"

Step 6

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %AppDataLocal%\XService

Step 7

Scan your computer with your Trend Micro product to delete files detected as TSPY_SOCELARS.D. 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 the following Trend Micro Support pages for more information:


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