Gen:Variant.Zusy.74640 (BitDefender), Trojan:Win32/Sulunch (Microsoft), Trojan.Win32.Fsysna.fge (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), BackDoor.Comet.152 (DrWeb), Gen:Variant.Zusy.74640 (B) (Emsisoft), Artemis!5E28166155DB (McAfee), Trojan.Win32.Fsysna (Ikarus), Gen:Variant.Zusy.74640 (FSecure), Dropper.Generic9.CGY (AVG), Win32:Malware-gen (Avast), TROJ_GEN.R021C0DLQ13 (TrendMicro), Worm.Win32.Ainslot.VB.FD, GenericAutorunWorm.YR, WormAinslot_VariantOfZeus.YR (Lavasoft MAS)Behaviour: Trojan, Worm, WormAutorun
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 5e28166155db04bc6d73349fb8d7e448
SHA1: 82f0072a39c02eff050a2b91dc732a23813a2c20
SHA256: e06861708ddf4a152c42766f44c2bb5877ea1b8fc6d9885928e28d3d004782d8
SSDeep: 6144:pSm3iN2akjX/mi6tpYgpxyN90QEq9AF98l6mW6hxOkyMUpM4F8KmkSTfg7Uebnwb:Qm3DaGei6tVy90HeM6hUk638Kwcvy
Size: 444423 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2013-12-02 18:17:20
Analyzed on: WindowsXP SP3 32-bit
Summary: Worm. A program that is primarily replicating on networks or removable drives.
Dynamic Analysis
Payload
Behaviour | Description |
---|---|
WormAutorun | A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Worm's file once a user opens a drive's folder in Windows Explorer. |
Process activity
The Worm creates the following process(es):
reg.exe:1780
reg.exe:748
reg.exe:1612
reg.exe:1392
reg.exe:948
The Worm injects its code into the following process(es):
%original file name%.exe:680
cvtres.exe:228
File activity
The process cvtres.exe:228 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Application Data\Isass (32 bytes)
%Documents and Settings%\%current user%\Application Data\isass.exe (35 bytes)
Registry activity
The process %original file name%.exe:680 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "88 01 BB 09 1B 7F A8 E3 46 6F BC 45 50 A6 C2 A2"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"
The Worm modifies IE settings for security zones to map all web-nodes that bypassing proxy to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass" = "1"
The Worm modifies IE settings for security zones to map all urls to the Intranet Zone:
"IntranetName" = "1"
The Worm modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:
"UNCAsIntranet" = "1"
The process reg.exe:1780 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1E 15 41 75 6F 73 72 92 66 5A 15 5B 48 EB E5 47"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process reg.exe:748 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1D 53 27 5C C9 52 80 82 C4 35 38 6A D4 13 82 4B"
Adds a rule to the firewall Windows which allows any network activity:
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%Documents and Settings%\%current user%\Application Data]
"isass.exe" = "%Documents and Settings%\%current user%\Application Data\isass.exe:*:Enabled:Windows Messanger"
The process reg.exe:1612 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "36 7A 72 52 AA 77 04 FB 04 D2 83 D4 3F 84 D8 00"
To automatically run itself each time Windows is booted, the Worm adds the following link to its file to the system registry autorun key:
[HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce]
"iexplore.exe" = "%Documents and Settings%\%current user%\Application Data\iexplore.exe"
The process reg.exe:1392 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C9 E4 E8 BE 3C 2C 2C 91 A8 50 E6 85 89 EE D4 4C"
Adds a rule to the firewall Windows which allows any network activity:
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%WinDir%\Microsoft.NET\Framework\v2.0.50727]
"cvtres.exe" = "%WinDir%\Microsoft.NET\Framework\v2.0.50727\cvtres.exe:*:Enabled:Windows Messanger"
The process reg.exe:948 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "CE E9 16 43 B7 E1 14 6E F0 09 CA C0 93 AA 4E 7C"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process cvtres.exe:228 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "73 2C 85 5B 3C 51 EF 34 55 4E EB 70 67 03 5B 68"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[HKCU\Software\VB and VBA Program Settings\INSTALL\DATE]
"GT3EOP3TI7" = "January 1, 2014"
[HKCU\Software\VB and VBA Program Settings\SrvID\ID]
"GT3EOP3TI7" = "Apex 5"
Network activity (URLs)
URL | IP |
---|---|
hxxp://api.ipinfodb.com/v2/ip_query_country.php?key=e2daa9f80efccf69baa89f5a6844da3778f9895aebd266425ee713814c74c902&timezone=off | 192.151.154.180 |
strangler89.no-ip.org | 82.224.43.206 |
HOSTS file anomalies
No changes have been detected.
Rootkit activity
No anomalies have been detected.
Propagation
A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Worm's file once a user opens a drive's folder in Windows Explorer.
Removals
Remove it with Ad-Aware
- Click (here) to download and install Ad-Aware Free Antivirus.
- Update the definition files.
- Run a full scan of your computer.
Manual removal*
- Terminate malicious process(es) (How to End a Process With the Task Manager):
reg.exe:1780
reg.exe:748
reg.exe:1612
reg.exe:1392
reg.exe:948 - Delete the original Worm file.
- Delete or disinfect the following files created/modified by the Worm:
%Documents and Settings%\%current user%\Application Data\Isass (32 bytes)
%Documents and Settings%\%current user%\Application Data\isass.exe (35 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce]
"iexplore.exe" = "%Documents and Settings%\%current user%\Application Data\iexplore.exe" - Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
- Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.