TROJ_DROPPR.LFN
Trojan:Win32/Dynamer!ac, Trojan:Win32/Dynamer!ac [non_writable_container] (Microsoft); RDN/Generic.hbg (McAfee); Trojan.Gen.2 (Symantec); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse MSIL11.ABBJ (AVG)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
TECHNICAL DETAILS
945,698 bytes
EXE
No
05 Apr 2017
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 creates the following folders:
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\RarSFX0
- %User Profile%\Application Data\Lulmigrmkwhr
(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.)
Other System Modifications
This Trojan deletes the following files:
- %User Temp%\RarSFX0\Krxoeoaonm.exe:Zone.Identifier
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.)
Dropping Routine
This Trojan drops the following files:
- __tmp_rar_sfx_access_check_289343
- Krxoeoaonm.exe
- Qamvenagxehdojkii.bin
- Trxoeoaonmsi.bin
- %User Profile%\Lulmigrmkwhr\Krxoeoaonm.exe
- %User Profile%\Lulmigrmkwhr\Qamvenagxehdojkii.bin
- %User Profile%\Lulmigrmkwhr\Trxoeoaonmsi.bin
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
This report is generated via an automated analysis system.
SOLUTION
9.8
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
Search and delete these components
- __tmp_rar_sfx_access_check_289343
- Krxoeoaonm.exe
- Qamvenagxehdojkii.bin
- Trxoeoaonmsi.bin
- %User Profile%\Lulmigrmkwhr\Krxoeoaonm.exe
- %User Profile%\Lulmigrmkwhr\Qamvenagxehdojkii.bin
- %User Profile%\Lulmigrmkwhr\Trxoeoaonmsi.bin
Step 3
Search and delete these folders
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\RarSFX0
- %User Profile%\Application Data\Lulmigrmkwhr
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_DROPPR.LFN. 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.
Step 5
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %User Temp%\RarSFX0\Krxoeoaonm.exe:Zone.Identifier
Did this description help? Tell us how we did.