TROJ_ZLOB.AMB
TrojanDownloader:Win32/Zlob.gen (Microsoft); Puper (McAfee); Trojan.Zlob (Symantec); Trojan-Downloader.Win32.Zlob.zk (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Downloader.Zlob.CCR (AVG)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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
67,088 bytes
EXE
No
11 Jun 2013
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%\1024
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
explorer\run
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
explorer\run
wininet.dll = "regperf.exe"
Dropping Routine
This Trojan drops the following files:
- %System%\ld100.tmp
- %System%\stdole3.tlb
- %System%\1024\ldB67E.tmp
- %System%\1024\ld980.tmp
- %System%\1024\ld5CD0.tmp
- %System%\1024\ldB040.tmp
- %System%\1024\ld303.tmp
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}.113.238/php/loader4/loaderinfo.php?{random characters}
This report is generated via an automated analysis system.
SOLUTION
9.300
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
Delete this registry key
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\Windows\CurrentVersion\policies\explorer
- run
Step 3
Delete this registry value
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\Windows\CurrentVersion\policies\explorer\run
- wininet.dll = "regperf.exe"
Step 4
Search and delete these components
- %System%\ld100.tmp
- %System%\stdole3.tlb
- %System%\1024\ldB67E.tmp
- %System%\1024\ld980.tmp
- %System%\1024\ld5CD0.tmp
- %System%\1024\ldB040.tmp
- %System%\1024\ld303.tmp
Step 5
Search and delete this folder
- %System%\1024
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_ZLOB.AMB. 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.
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