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TrojanSpy.Win32.LOKI.TIOIBYOY

October 14, 2019
 ALIASES:

Fareit-FPT!EFF8DD9E12E2 (McAfee); Backdoor.Win32.Androm.tinu (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • 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:

1,019,904 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

14 Oct 2019

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 creates the following folders:

  • %User Profile%\dgdgfgfgfhhfhhfhh

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other System Modifications

This Trojan Spy adds the following registry keys:

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
U8cf1158\rygYy4l0Qd6qFKJ0Mee4boOd118

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
WwE2cL1MGp2apIWlBjQFEmp5iUzB8vD1gbF0gu140\idvMX4GaaydYRp4gCrh3fPwmtW1y178

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
BhtWkZ2rxvfGn207\dRT1mUw4GQk923

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
rygYy4l0Qd6qFKJ0Mee4boOd167\mbEKokNFEC100

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
idvMX4GaaydYRp4gCrh3fPwmtW1y246\mXoSJho7rVlXc9sw565

It adds the following registry entries:

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
U8cf1158\rygYy4l0Qd6qFKJ0Mee4boOd118
mbEKokNFEC51 = "YxPXLcTKBfqq2JM216"

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
WwE2cL1MGp2apIWlBjQFEmp5iUzB8vD1gbF0gu140\idvMX4GaaydYRp4gCrh3fPwmtW1y178
mXoSJho7rVlXc9sw5250 = "ukaxTSqcQt121"

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
BhtWkZ2rxvfGn207\dRT1mUw4GQk923
tWIKJYnBQQmez8nKB92 = "PMBuqHP4c4UySYBtnZhugL3boW11X80"

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
rygYy4l0Qd6qFKJ0Mee4boOd167\mbEKokNFEC100
YxPXLcTKBfqq2JM38 = "WwE2cL1MGp2apIWlBjQFEmp5iUzB8vD1gbF0gu159"

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
idvMX4GaaydYRp4gCrh3fPwmtW1y246\mXoSJho7rVlXc9sw565
ukaxTSqcQt68 = "BhtWkZ2rxvfGn174"

Dropping Routine

This Trojan Spy drops the following files:

  • %User Profile%\dgdgfgfgfhhfhhfhh\dgdgfgfgfhhfhhfhh.vbs
  • %User Profile%\dgdgfgfgfhhfhhfhh\dgdgfgfgfhhfhhfhh.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.850

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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_CURRENT_USER\Software\VB and VBA Program Settings\U8cf1158
    • rygYy4l0Qd6qFKJ0Mee4boOd118
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\WwE2cL1MGp2apIWlBjQFEmp5iUzB8vD1gbF0gu140
    • idvMX4GaaydYRp4gCrh3fPwmtW1y178
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\BhtWkZ2rxvfGn207
    • dRT1mUw4GQk923
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\rygYy4l0Qd6qFKJ0Mee4boOd167
    • mbEKokNFEC100
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\idvMX4GaaydYRp4gCrh3fPwmtW1y246
    • mXoSJho7rVlXc9sw565

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_CURRENT_USER\Software\VB and VBA Program Settings\U8cf1158\rygYy4l0Qd6qFKJ0Mee4boOd118
    • mbEKokNFEC51 = "YxPXLcTKBfqq2JM216"
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\WwE2cL1MGp2apIWlBjQFEmp5iUzB8vD1gbF0gu140\idvMX4GaaydYRp4gCrh3fPwmtW1y178
    • mXoSJho7rVlXc9sw5250 = "ukaxTSqcQt121"
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\BhtWkZ2rxvfGn207\dRT1mUw4GQk923
    • tWIKJYnBQQmez8nKB92 = "PMBuqHP4c4UySYBtnZhugL3boW11X80"
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\rygYy4l0Qd6qFKJ0Mee4boOd167\mbEKokNFEC100
    • YxPXLcTKBfqq2JM38 = "WwE2cL1MGp2apIWlBjQFEmp5iUzB8vD1gbF0gu159"
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\idvMX4GaaydYRp4gCrh3fPwmtW1y246\mXoSJho7rVlXc9sw565
    • ukaxTSqcQt68 = "BhtWkZ2rxvfGn174"

Step 4

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %User Profile%\dgdgfgfgfhhfhhfhh\dgdgfgfgfhhfhhfhh.vbs
  • %User Profile%\dgdgfgfgfhhfhhfhh\dgdgfgfgfhhfhhfhh.exe

Step 5

Search and delete this folder

[ 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.
  • %User Profile%\dgdgfgfgfhhfhhfhh

Step 6

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.LOKI.TIOIBYOY. 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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