Gen.Variant.Adware.Barys.2471_dfdd26d098

Dynamic Analysis

Payload

Behaviour	Description
EmailWorm	Worm can send e-mails.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:1024
%original file name%.exe:668

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

FLC.exe:392

Mutexes

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

File activity

The process %original file name%.exe:1024 makes changes in the file system.

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

%Documents and Settings%\All Users\Application Data\GAXJYM\FLC.01 (81 bytes)
%Documents and Settings%\All Users\Application Data\GAXJYM\FLC.00 (2 bytes)
%Documents and Settings%\All Users\Application Data\GAXJYM\FLC.exe (15801 bytes)
%Documents and Settings%\All Users\Application Data\GAXJYM\FLC.02 (56 bytes)

Registry activity

The process %original file name%.exe:1024 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "76 8A 59 C9 95 0C 44 A8 9D FE EE 73 94 29 D6 A4"

[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"

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

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

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\All Users\Application Data\GAXJYM]
"FLC.exe" = "FLC"

[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\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

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

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"

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:

"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"

The process %original file name%.exe:668 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "48 A3 64 4F 45 8C C1 69 78 87 AB CD F4 48 FD 8A"

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

The process FLC.exe:392 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "2B E2 E4 E6 3A 84 31 E1 33 EB 81 AD C7 11 64 13"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

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

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

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

[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"

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

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"FLC Start" = "%Documents and Settings%\All Users\Application Data\GAXJYM\FLC.exe"

Dropped PE files

MD5	File path
7059cdba57a398f80a9afd3de0ffbd07	c:\Documents and Settings\All Users\Application Data\GAXJYM\FLC.01
def249d7a5f5aa0ae0caf1d3b9700171	c:\Documents and Settings\All Users\Application Data\GAXJYM\FLC.02
3d09e558be6c81f8e5fdde46888944d6	c:\Documents and Settings\All Users\Application Data\GAXJYM\FLC.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

Removals

Static Analysis

VersionInfo

No information is available.

No information is available.

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	8192	113586	113664	4.50547	4d9f10e4ce147d9739ca592d0a26066a
.rsrc	122880	2870256	2870272	4.67127	d3d0e42ef5e110e7c6452bb8d59ed3bd
.reloc	2998272	12	512	0.070639	940684ce09202fd9c64dacfcacbf8d09

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

FLC.exe_392:

.text

.text

`.rdata

`.rdata

@.data

@.data

.rsrc

.rsrc

udPh

udPh

PSSSSSSh

PSSSSSSh

PSSSSSSh!

PSSSSSSh!

vSSSh

vSSSh

FTPjK

FTPjK

FtPj;

FtPj;

C.PjRV

C.PjRV

tGHt.Ht&

tGHt.Ht&

.EKSWU

.EKSWU

FTPG

FTPG

FTPj

FTPj

FtPS

FtPS

H%x\U

H%x\U

H%x]U

H%x]U

=KNILw.tT=RCNEw

=KNILw.tT=RCNEw

_0 _8 _4;_,

_0 _8 _4;_,

SHA1 block transform for x86, CRYPTOGAMS by <appro></appro>

SHA1 block transform for x86, CRYPTOGAMS by <appro></appro>

SHA256 block transform for x86, CRYPTOGAMS by <appro></appro>

SHA256 block transform for x86, CRYPTOGAMS by <appro></appro>

DlSHA512 block transform for x86, CRYPTOGAMS by <appro></appro>

DlSHA512 block transform for x86, CRYPTOGAMS by <appro></appro>

Montgomery Multiplication for x86, CRYPTOGAMS by <appro></appro>

Montgomery Multiplication for x86, CRYPTOGAMS by <appro></appro>

6-9'6-9'

6-9'6-9'

$6.:$6.:

$6.:$6.:

*?#1*?#1

*?#1*?#1

>8$4,8$4,

>8$4,8$4,

AES for x86, CRYPTOGAMS by <appro></appro>

AES for x86, CRYPTOGAMS by <appro></appro>

Camellia for x86 by <appro></appro>

Camellia for x86 by <appro></appro>

RC4 for x86, CRYPTOGAMS by <appro></appro>

RC4 for x86, CRYPTOGAMS by <appro></appro>

FRegDeleteKeyExW

FRegDeleteKeyExW

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