Gen.Variant.Graftor.Elzob.285_e7c0e74453 – Adaware

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 Trojan's file once a user opens a drive's folder in Windows Explorer.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:1664

The Trojan injects its code into the following process(es):

svchost.exe:1200

Mutexes

The following mutexes were created/opened:No objects were found.

File activity

The process %original file name%.exe:1664 makes changes in the file system.

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

%Documents and Settings%\%current user%\Application Data\Microsoft\svchost.exe (1281 bytes)

Registry activity

The process %original file name%.exe:1664 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "07 2A A7 5A D9 D2 BE 3E 0D 86 4E B8 5D D0 4B 1D"

[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"
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[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\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[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"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Application Data\Microsoft]
"svchost.exe" = "swingchat"

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

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

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

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

The Trojan 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:

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

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

"ProxyBypass" = "1"

Dropped PE files

There are no dropped PE files.

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 Trojan'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:1664
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\%current user%\Application Data\Microsoft\svchost.exe (1281 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"svchost.exe" = "%Documents and Settings%\%current user%\Application Data\Microsoft\svchost.exe"
Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
Reboot the computer.

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

Static Analysis

VersionInfo

Company Name:
Product Name: swingerschat
Product Version: 1.1.2.0
Legal Copyright: swingchat
Legal Trademarks:
Original Filename: swingchatv1.1.exe
Internal Name: swings
File Version: 1,1,2,0
File Description: swingchat
Comments:
Language: Chinese (Simplified, PRC)

Company Name: Product Name: swingerschatProduct Version: 1.1.2.0Legal Copyright: swingchatLegal Trademarks: Original Filename: swingchatv1.1.exeInternal Name: swingsFile Version: 1,1,2,0File Description: swingchatComments: Language: Chinese (Simplified, PRC)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	37210	40960	4.35986	514f499401b4cb8267545241538c038b
.rdata	45056	6922	8192	3.2893	d0e75e71ead3c80bab74e6d14cf57bd8
.data	53248	9476	8192	1.40555	22c2d19cc6ae35c33af8f8bbf1093d6a
.rsrc	65536	133468	135168	5.47902	bcf02b33bf13258e33fdb144cfd1c7c3
.reloc	200704	4238	8192	0	0829f71740aab1ab98b33eae21dee122

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

The Trojan connects to the servers at the folowing location(s):

Strings from Dumps

svchost.exe_1200:

.idata

.rdata

P.reloc

P.rsrc

kernel32.dll

$*@@@*$@@@$ *@@* $@@($*)@-$*@@$-*@@$*-@@(*$)@-*$@@*-$@@*$-@@-* $@-$ *@* $-@$ *-@$ -*@*- $@($ *)(* $)

oleaut32.dll

EVariantBadIndexError

SQL error or missing database

An internal logic error in SQLite

Operation terminated by sqlite3_interrupt()

Uses OS features not supported on host

2nd parameter to sqlite3_bind out of range

sqlite3_step() has another row ready

sqlite3_step() has finished executing

Unknown SQLite Error Code "

ESQLiteException

TSQLiteDatabase

TSQLiteTable

sqlite3_open

sqlite3_errmsg

sqlite3_free

sqlite3_close

sqlite3_last_insert_rowid

sqlite3_total_changes

sqlite3_errcode

sqlite3_bind_text

sqlite3_bind_int

sqlite3_bind_int64

sqlite3_bind_double

sqlite3_bind_null

sqlite3_bind_blob

sqlite3_prepare_v2

sqlite3_step

sqlite3_reset

sqlite3_finalize

sqlite3_prepare

sqlite3_busy_timeout

sqlite3_libversion

sqlite3_create_collation

sqlite3_bind_parameter_index

sqlite3_changes

sqlite3_column_count

sqlite3_column_name

sqlite3_column_decltype

sqlite3_column_type

sqlite3_column_int64

sqlite3_column_double

sqlite3_column_bytes

sqlite3_column_blob

sqlite3_column_text

Failed to open database "%s" : %s

Failed to open database "%s" : unknown error

Error [%d]: %s.

"%s": %s

Error executing SQL

Could not prepare SQL statement

Error executing SQL statement

SQLite is Busy

udprec

SOFTWARE\Microsoft\Windows\CurrentVersion\Run\

:\autorun.inf

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

\Mozilla Firefox\

nss3.dll

mozcrt19.dll

sqlite3.dll

nspr4.dll

plc4.dll

plds4.dll

nssutil3.dll

softokn3.dll

PK11_GetInternalKeySlot

userenv.dll

\Mozilla\Firefox\

profiles.ini

\signons3.txt

\Mozilla\Firefox\profiles.ini

signons.sqlite

SELECT * FROM moz_logins

encryptedPassword

Urlmon.dll

Shell32.dll

URLDownloadToFileA

ShellExecuteA

Future Windows version (unknown)

Windows

UDPPROG1|

UDPStart|

SOFTWARE\Mozilla\Mozilla Firefox\

WEBDL

SOFTWARE\Microsoft\Windows\CurrentVersion\Run

svchost.exe

user32.dll

GetKeyboardType

advapi32.dll

RegOpenKeyExA

RegCloseKey

RegFlushKey

RegCreateKeyExA

GetCPInfo

MsgWaitForMultipleObjects

wsock32.dll

shell32.dll

5 5$5(5,5054585

>">*>2>:>

: :$:(:,:0:4:8:<:>

SQLite3

KWindows

UrlMon

SQLiteTable3

Cannot open file "%s". %s

Invalid data type for '%s' List capacity out of bounds (%d)

List count out of bounds (%d)

List index out of bounds (%d) Out of memory while expanding memory stream

Failed to get data for '%s'

Failed to set data for '%s'

%s.Seek not implemented$Operation not allowed on sorted list

Thread creation error: %s

Thread Error: %s (%d)

Cannot assign a %s to a %sECheckSynchronize called from thread $%x, which is NOT the main thread%String list does not allow duplicates

Cannot create file "%s". %s

%s (%s, line %d)

Abstract Error?Access violation at address %p in module '%s'. %s of address %p

System Error. Code: %d.

Invalid variant operation%Invalid variant operation (%s%.8x)

%s5Could not convert variant of type (%s) into type (%s)=Overflow while converting variant of type (%s) into type (%s)

Operation not supported

External exception %x

Interface not supported

Invalid pointer operation

Invalid class typecast0Access violation at address %p. %s of address %p

Privileged instruction(Exception %s in module %s at %p.

Application Error1Format '%s' invalid or incompatible with argument

No argument for format '%s'"Variant method calls not supported

!'%s' is not a valid integer value('%s' is not a valid floating point value

I/O error %d

Integer overflow Invalid floating point operation

svchost.exe_1200_rwx_00400000_00027000: