Dropped.Generic.Malware.SBdld.A4C9837C_0501e04ace – Adaware

HEUR:Trojan.Win32.Generic (Kaspersky), Dropped:Generic.Malware.SBdld.A4C9837C (B) (Emsisoft), Dropped:Generic.Malware.SBdld.A4C9837C (AdAware), GenericAutorunWorm.YR, GenericIRCBot.YR (Lavasoft MAS)Behaviour: Trojan, Worm, WormAutorun, IRCBot

The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary

MD5: 0501e04ace86a943d88c27ba58d266e9

SHA1: 151349bb063966743f3c25ade8118d71e53b43b6

SHA256: d145d0352e46b3bc2f2603c3277989d3fb4e262702b11580ebb3884132baf07c

SSDeep: 1536:GlehELCpJDL5KIoIWmJDRJacWnGpnyEctzyP4bGSenrUKz3xVdQZtACGU:Gle8Cj35gmJDRJgnGpn14bMrUQctAA

Size: 108313 bytes

File type: EXE

Platform: WIN32

Entropy: Packed

PEID: UPolyXv05_v6

Company: no certificate found

Created at: 2007-03-31 18:09:36

Analyzed on: WindowsXP SP3 32-bit

Summary: Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

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 Dropped's file once a user opens a drive's folder in Windows Explorer.
IRCBot	A bot can communicate with command and control servers via IRC channel.

Process activity

The Dropped creates the following process(es):

%original file name%.exe:1588
asofsrvs.exe:652
Zer0xMod.exe:1252

The Dropped injects its code into the following process(es):No processes have been created.

File activity

The process %original file name%.exe:1588 makes changes in the file system.

The Dropped creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\Zer0xMod.exe (1568 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\stub_2014-04-02.Bin (1568 bytes)

The Dropped deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\nss1.tmp (0 bytes)

The process Zer0xMod.exe:1252 makes changes in the file system.

The Dropped creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\asofsrvs.exe (35 bytes)

Registry activity

The process %original file name%.exe:1588 makes changes in the system registry.

The Dropped creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "85 78 69 8E ED 1F 06 3A 57 72 68 1B 2E 1E 35 06"

[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"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Documents"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Desktop" = "%Documents and Settings%\%current user%\Desktop"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp]
"Zer0xMod.exe" = "Zer0xMod"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Desktop"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Personal" = "%Documents and Settings%\%current user%\My Documents"

The Dropped modifies IE settings for security zones to map all urls to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"

The Dropped 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 Dropped modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:

"ProxyBypass" = "1"

The process asofsrvs.exe:652 makes changes in the system registry.

The Dropped creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E3 10 1A 2E 4F 8C 4C CA F6 92 05 3F 63 DD DC 7B"

The process Zer0xMod.exe:1252 makes changes in the system registry.

The Dropped creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1F ED 9A 9D DC 0C 0C 88 DE 4B 55 EA 4A B2 9F EA"

To automatically run itself each time Windows is booted, the Dropped adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"AsofServices" = "%Documents and Settings%\%current user%\Application Data\asofsrvs.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"AsofServices" = "%Documents and Settings%\%current user%\Application Data\asofsrvs.exe"

Dropped PE files

MD5	File path
644efdfad3da907eb42b01c24a2a666e	c:\Documents and Settings\"%CurrentUserName%"\Application Data\asofsrvs.exe
644efdfad3da907eb42b01c24a2a666e	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\Zer0xMod.exe

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 Dropped'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):
%original file name%.exe:1588
asofsrvs.exe:652
Zer0xMod.exe:1252
Delete the original Dropped file.
Delete or disinfect the following files created/modified by the Dropped:
%Documents and Settings%\%current user%\Local Settings\Temp\Zer0xMod.exe (1568 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\stub_2014-04-02.Bin (1568 bytes)
%Documents and Settings%\%current user%\Application Data\asofsrvs.exe (35 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"AsofServices" = "%Documents and Settings%\%current user%\Application Data\asofsrvs.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"AsofServices" = "%Documents and Settings%\%current user%\Application Data\asofsrvs.exe"
Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

Static Analysis

VersionInfo

No information is available.

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	22938	23040	4.4974	b45ccdd15edee1baca8064a4b20635b0
.rdata	28672	4324	4608	3.49045	9a4c5d765a28fb9f7efb6896024d70dd
.data	36864	3775508	1024	3.46438	44b4c1a8b7b954d45ab0e80c3c998752
.ndata	3813376	32768	0	0	d41d8cd98f00b204e9800998ecf8427e
.rsrc	3846144	11632	11776	3.78431	d21535eee11c6ca074f82d8e294d919d

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Map

Strings from Dumps

asofsrvs.exe_652:

.text

`.rdata

@.data

user32.dll

GetWindowsDirectoryA

KERNEL32.dll

RegCloseKey

RegCreateKeyExA

ADVAPI32.dll

ShellExecuteA

SHELL32.dll

WS2_32.dll

SHLWAPI.dll

URLDownloadToFileA

urlmon.dll

GetCPInfo

%s\%s

del "%s">nul

if exist "%s" goto Repeat

ping 1.1.1.1 -w 5000 >nul

%s\removeMe%i%i%i%i.bat

NICK

JOIN

PRIVMSG

%s :%s

%s %s :%s

%s %s

%s %s %s

%s %s "" "lol" :%s

Gtfo! Wr0ng PaSS!

Vup.exe

Missing Parms: -IP- -Port- -Packets- -Size- -Delay- -TimeOut-

Missing Parms: -IP- -Port- -Packets- -TimeOut-

FAiLED 2 ExECuTe! [ A.V DETECTION ].

DoWnLoaDeD & ExECuTeD!

shlwapi.dll

[.ShellClassInfo]

CLSID={645FF040-5081-101B-9F08-00AA002F954E}

\Desktop.ini

\autorun.inf

icon=%SystemRoot%\system32\SHELL32.dll,4

join

asofsrvs.exe

VanaDiuM iRC BOT v1.3.0.

SOFTWARE\Microsoft\Windows\CurrentVersion\Run\

%Documents and Settings%\%current user%\Application Data\asofsrvs.exe