TROJ_DROPPR.YYUJ
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
366,080 bytes
EXE
No
06 Oct 2016
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 drops the following copies of itself into the affected system:
- %User Temp%\2007.exe
(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.)
It creates the following folders:
- %User Temp%\66
- %User Temp%\69
- %User Temp%\16
- %User Temp%\23
- %User Temp%\29
- %User Temp%\36
- %User Temp%\43
- %User Temp%\50
- %User Temp%\57
- %User Temp%\64
- %User Temp%\70
- %User Temp%\17
- %User Temp%\24
- %User Temp%\31
- %User Temp%\38
- %User Temp%\45
- %User Temp%\52
- %User Temp%\59
- %User Profile%\Application Data\love_3
- %User Temp%\sys_3
- %User Temp%\wormy3
- %User Profile%\Application Data\love_2
- %User Temp%\sys_2
- %User Temp%\wormy1
(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.. %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.)
Other System Modifications
This Trojan deletes the following files:
- %User Temp%\sys_3\1836.txt
- %User Temp%\sys_3\1532.txt
- %User Temp%\sys_3\1429.txt
- %User Temp%\2007.exe
- %User Temp%\sys_3\2106.txt
- %User Temp%\sys_3\1730.txt
- %User Temp%\sys_3\1567.txt
- %User Temp%\sys_3\1.txt
- %User Temp%\sys_3\3.txt
- %User Temp%\sys_3\2.txt
- %User Temp%\sys_3\48.txt
- %User Temp%\sys_3\42.txt
- %User Temp%\sys_3\41.txt
- %User Temp%\sys_3\140.txt
- %User Temp%\sys_3\128.txt
- %User Temp%\sys_3\113.txt
- %User Temp%\sys_3\315.txt
- %User Temp%\sys_3\275.txt
- %User Temp%\sys_3\253.txt
- %User Temp%\sys_3\560.txt
- %User Temp%\sys_3\478.txt
- %User Temp%\sys_3\421.txt
- %User Temp%\sys_3\875.txt
- %User Temp%\sys_3\737.txt
- %User Temp%\sys_3\666.txt
- %User Temp%\sys_3\1260.txt
- %User Temp%\sys_3\1052.txt
- %User Temp%\sys_3\967.txt
- %User Temp%\sys_3\1715.txt
- %User Temp%\sys_3\1423.txt
- %User Temp%\sys_3\1324.txt
- %User Temp%\sys_3\2145.txt
- %User Temp%\sys_3\1762.txt
- %User Temp%\sys_3\1651.txt
- %User Temp%\sys_3\4.txt
- %User Temp%\sys_3\6.txt
- %User Temp%\sys_3\5.txt
- %User Temp%\sys_3\63.txt
- %User Temp%\sys_3\56.txt
- %User Temp%\sys_3\46.txt
- %User Temp%\sys_3\192.txt
- %User Temp%\sys_3\162.txt
- %User Temp%\sys_3\145.txt
- %User Temp%\sys_3\391.txt
- %User Temp%\sys_3\324.txt
- %User Temp%\sys_3\300.txt
- %User Temp%\sys_3\660.txt
- %User Temp%\sys_3\542.txt
- %User Temp%\sys_3\511.txt
- %User Temp%\sys_3\999.txt
- %User Temp%\sys_3\816.txt
- %User Temp%\sys_3\741.txt
- %User Temp%\sys_3\1408.txt
- %User Temp%\sys_3\1146.txt
- %User Temp%\sys_3\1057.txt
(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:
- %User Temp%\_2_2_.exe
- %User Temp%\love1_all.exe
- %User Temp%\sys_2\1429.txt
(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.)
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
- %User Temp%\_2_2_.exe
- %User Temp%\love1_all.exe
- %User Temp%\sys_2\1429.txt
Step 3
Search and delete these folders
- %User Temp%\66
- %User Temp%\69
- %User Temp%\16
- %User Temp%\23
- %User Temp%\29
- %User Temp%\36
- %User Temp%\43
- %User Temp%\50
- %User Temp%\57
- %User Temp%\64
- %User Temp%\70
- %User Temp%\17
- %User Temp%\24
- %User Temp%\31
- %User Temp%\38
- %User Temp%\45
- %User Temp%\52
- %User Temp%\59
- %User Profile%\Application Data\love_3
- %User Temp%\sys_3
- %User Temp%\wormy3
- %User Profile%\Application Data\love_2
- %User Temp%\sys_2
- %User Temp%\wormy1
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_DROPPR.YYUJ. 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%\sys_3\1836.txt
- %User Temp%\sys_3\1532.txt
- %User Temp%\sys_3\1429.txt
- %User Temp%\2007.exe
- %User Temp%\sys_3\2106.txt
- %User Temp%\sys_3\1730.txt
- %User Temp%\sys_3\1567.txt
- %User Temp%\sys_3\1.txt
- %User Temp%\sys_3\3.txt
- %User Temp%\sys_3\2.txt
- %User Temp%\sys_3\48.txt
- %User Temp%\sys_3\42.txt
- %User Temp%\sys_3\41.txt
- %User Temp%\sys_3\140.txt
- %User Temp%\sys_3\128.txt
- %User Temp%\sys_3\113.txt
- %User Temp%\sys_3\315.txt
- %User Temp%\sys_3\275.txt
- %User Temp%\sys_3\253.txt
- %User Temp%\sys_3\560.txt
- %User Temp%\sys_3\478.txt
- %User Temp%\sys_3\421.txt
- %User Temp%\sys_3\875.txt
- %User Temp%\sys_3\737.txt
- %User Temp%\sys_3\666.txt
- %User Temp%\sys_3\1260.txt
- %User Temp%\sys_3\1052.txt
- %User Temp%\sys_3\967.txt
- %User Temp%\sys_3\1715.txt
- %User Temp%\sys_3\1423.txt
- %User Temp%\sys_3\1324.txt
- %User Temp%\sys_3\2145.txt
- %User Temp%\sys_3\1762.txt
- %User Temp%\sys_3\1651.txt
- %User Temp%\sys_3\4.txt
- %User Temp%\sys_3\6.txt
- %User Temp%\sys_3\5.txt
- %User Temp%\sys_3\63.txt
- %User Temp%\sys_3\56.txt
- %User Temp%\sys_3\46.txt
- %User Temp%\sys_3\192.txt
- %User Temp%\sys_3\162.txt
- %User Temp%\sys_3\145.txt
- %User Temp%\sys_3\391.txt
- %User Temp%\sys_3\324.txt
- %User Temp%\sys_3\300.txt
- %User Temp%\sys_3\660.txt
- %User Temp%\sys_3\542.txt
- %User Temp%\sys_3\511.txt
- %User Temp%\sys_3\999.txt
- %User Temp%\sys_3\816.txt
- %User Temp%\sys_3\741.txt
- %User Temp%\sys_3\1408.txt
- %User Temp%\sys_3\1146.txt
- %User Temp%\sys_3\1057.txt
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