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TrojanSpy.MSIL.NEGASTEAL.RJAHSPB

December 16, 2022
 Analysis by: Jayvee Mark Villaroman
 ALIASES:

Trojan:Win32/Leonem (MICROSOFT)

 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:

4,386 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

15 Dec 2022

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.

Other System Modifications

This Trojan Spy modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASAPI32
EnableFileTracing = 0

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASAPI32
EnableConsoleTracing = 0

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASAPI32
FileTracingMask = 4294901760

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASAPI32
ConsoleTracingMask = 4294901760

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASAPI32
MaxFileSize = 1048576

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASAPI32
FileDirectory = %windir%\tracing

Other Details

This Trojan Spy connects to the following possibly malicious URL:

  • https://www.{BLOCKED}er.sh/

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

17.945.96

FIRST VSAPI PATTERN DATE:

18 Nov 2022

VSAPI OPR PATTERN File:

17.946.00

VSAPI OPR PATTERN Date:

19 Nov 2022

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

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

Restore this modified 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\Microsoft\Tracing\RASAPI32
    • EnableFileTracing=0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\RASAPI32
    • EnableConsoleTracing=0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\RASAPI32
    • FileTracingMask=4294901760
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\RASAPI32
    • ConsoleTracingMask=4294901760
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\RASAPI32
    • MaxFileSize=1048576
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\RASAPI32
    • FileDirectory=%windir%\tracing

Step 4

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.MSIL.NEGASTEAL.RJAHSPB. 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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