arrow_back
search
close

TrojanSpy.Win32.URSNIF.JAFIG

August 12, 2019
 Analysis by: Arvin Roi Macaraeg
 ALIASES:

VirTool:Win32/AutInject.CZ!bit [non_writable_container] (Microsoft); AutoIt/Injector.ac (McAfee); Backdoor.Win32.Androm.roiz (Kaspersky)

 PLATFORM:

Windows

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

689,152 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

12 Aug 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 drops the following copies of itself into the affected system:

  • %Application Data%\Microsoft\Chkwtxml\apiMFWGP.exe

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

Autostart Technique

This Trojan Spy adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
audigcfg = %Application Data%\Microsoft\Chkwtxml\apiMFWGP.exe

Dropping Routine

This Trojan Spy drops the following files:

  • %Local Temp%\{random 4 characters}.bi1
  • %Local Temp%\{random 4 characters}.bin

Other Details

This Trojan Spy connects to the following possibly malicious URL:

  • http://{BLOCKED}lfind.at/images/GOVzC8Nt8a/6xdRA
    yZjxUCAZb4Dh/ny8ZTcogdugv/HDGw0ajMAiY/NA
    JXeGIpY2lmBG/7a9DwgXrbtwcBD_2BlL_2/B5aKA
    kIArmMxvtYr/L8dDCzg1UVJ9xWq/7Ct_2F_2B492F
    2crrH/f5sUXzk2U/HG0VHR_2F01rcmjbuZW2/vV
    gQAISfwhyqf_2Fv00/5TtHFQcxVzOkDcXI3K_2Fr/Id_2F
    LimMmYRd/SuOsEGN4J/zIiJ.bmp
  • {BLOCKED}zaelooop11.club

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.294.04

FIRST VSAPI PATTERN DATE:

12 Aug 2019

VSAPI OPR PATTERN File:

15.291.00

VSAPI OPR PATTERN Date:

13 Aug 2019

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

Identify and terminate files detected as TrojanSpy.Win32.URSNIF.JAFIG

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

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\Microsoft\Windows\CurrentVersion\Run
    • audigcfg = %Application Data%\Microsoft\Chkwtxml\apiMFWGP.exe

Step 5

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.  
  • %Local Temp%\{random 4 characters}.bi1
  • %Local Temp%\{random 4 characters}.bin

Step 6

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.URSNIF.JAFIG. 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:


Did this description help? Tell us how we did.