TROJ_BANLOAD.YWNIT
TrojanDownloader:Win32/Banload (Microsoft); RDN/Generic.bfr!im (McAfee); Downloader (Symantec); Backdoor.Win32.Androm.hbvh (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Downloader.Banload2.ADTY (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
1,044,480 bytes
EXE
No
11 Jul 2015
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:
- %User Profile%\Microsoft\windowsphone
(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.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
comic = "%User Profile%\Application Data\comic.exe"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\ByConect
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_VP = "C97A879C6AA6"
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_L_Mod = "9A69B647CD70CECDCF355FB9C5C3C6CF3B4C5BD02A7DCA1F2DD22120E01DCF0725BE1A60"
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_L_Str = "54D620F813353554B4D92264AEE82069A2F7077C97E270F84BB4471AE01837EB36839A"
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_L_A = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_L_AU = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_L_CF = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_L_P_L = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_L_P_P = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_L_P_R = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_L_Com = "060413EB2618167597FC07010D0B0E0700111E1368B30357E52BF949C17CA75A90DF65E37FAC217B"
HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
G_run = "%User Profile%\windowsphone\app01"
Dropping Routine
This Trojan drops the following files:
- %Program Files%\icfaadb.tmp
- %User Profile%\windowsphone\app02
- %User Profile%\windowsphone\app01
- %User Profile%\windowsphone\app03
- %User Profile%\windowsphone\apps
- %User Profile%\Application Data\comic.exe
(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %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 Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}.123.58/rn/wp-modulos/app01
- http://{BLOCKED}.123.58/rn/wp-modulos/app02
- http://{BLOCKED}.123.58/rn/wp-modulos/app03
- http://{BLOCKED}.123.58/rn/wp-starts
- {BLOCKED}0.1
- {BLOCKED}.228.255
- {BLOCKED}8.11.22
This report is generated via an automated analysis system.
SOLUTION
9.750
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
Restart in Safe Mode
Step 3
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
- ByConect
Step 4
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\Run
- comic = "%User Profile%\Application Data\comic.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_VP = "C97A879C6AA6"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_L_Mod = "9A69B647CD70CECDCF355FB9C5C3C6CF3B4C5BD02A7DCA1F2DD22120E01DCF0725BE1A60"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_L_Str = "54D620F813353554B4D92264AEE82069A2F7077C97E270F84BB4471AE01837EB36839A"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_L_A = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_L_AU = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_L_CF = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_L_P_L = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_L_P_P = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_L_P_R = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_L_Com = "060413EB2618167597FC07010D0B0E0700111E1368B30357E52BF949C17CA75A90DF65E37FAC217B"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ByConect
- G_run = "%User Profile%\windowsphone\app01"
Step 5
Search and delete these components
- %Program Files%\icfaadb.tmp
- %User Profile%\windowsphone\app02
- %User Profile%\windowsphone\app01
- %User Profile%\windowsphone\app03
- %User Profile%\windowsphone\apps
- %User Profile%\Application Data\comic.exe
Step 6
Search and delete this folder
- %User Profile%\Microsoft\windowsphone
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_BANLOAD.YWNIT. 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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