quasar | fcd5b843d50ec2f973aaa27e54b6bf045931cc3cb8d9bea4edaade352fe0f7d5

Analysis

max time kernel
300s
max time network
300s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
02-06-2024 06:23

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General

Target

uni/Uni - Copy (20) - Copy.exe
Size

409KB
MD5

b70fdac25a99501e3cae11f1b775249e
SHA1

3c59226479bfdcd1b2927bcfb1a7516d4cb8dd71
SHA256

51ff3eb450a786c1aaa75ff889f2fd256412a7b75d04277fdf9fcccc20e57246
SHA512

43f0d5d6e5f0d5febba537c109ffdbc250bbb6e9725e635a43ec975b0353048eaeee50b6e9274cd5e072ea6b0cea32439bd37408b2528832f467f2075f74ca44
SSDEEP

12288:gpbJjGut6AoE3hVVdFaC/eZPTMTDlpgfJCKuMsVs:oVaurMLcDlpRKai

Score

10^/10

quasar seroxen spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen

panel-slave.gl.at.ply.gg:57059

panel-slave.gl.at.ply.gg:27892

Mutex

$Sxr-rpL8EItHN3pqIQQVy2

Attributes

encryption_key
Lme7VBS3l58VwLM69PNM
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
SeroXen
subdirectory
SubDir

Signatures

Quasar RAT 4 IoCs
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Processes:

schtasks.exe

flow ioc

18 ip-api.com
2636 schtasks.exe
2 ip-api.com
6 api.ipify.org

flow	ioc
18	ip-api.com
2636	schtasks.exe
2	ip-api.com
6	api.ipify.org

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral25/memory/2176-1-0x00000000001C0000-0x000000000022C000-memory.dmp	family_quasar
\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
behavioral25/memory/2868-10-0x0000000000350000-0x00000000003BC000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

Client.exeSKeKIygo2P3x.exe

pid process

2868 Client.exe
1760 SKeKIygo2P3x.exe
Loads dropped DLL 2 IoCs

Processes:

Uni - Copy (20) - Copy.exeClient.exe

pid process

2176 Uni - Copy (20) - Copy.exe
2868 Client.exe
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

2 ip-api.com
6 api.ipify.org
18 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeSCHTASKS.exeschtasks.exeSCHTASKS.exe

pid process

2636 schtasks.exe
1536 SCHTASKS.exe
2508 schtasks.exe
2976 SCHTASKS.exe

pid	process
2868	Client.exe
1760	SKeKIygo2P3x.exe

pid	process
2176	Uni - Copy (20) - Copy.exe
2868	Client.exe

flow	ioc
2	ip-api.com
6	api.ipify.org
18	ip-api.com

pid	process
2636	schtasks.exe
1536	SCHTASKS.exe
2508	schtasks.exe
2976	SCHTASKS.exe

Modifies Internet Explorer settings 1 TTPs 26 IoCs

adware spyware

Modify Registry

T1112

Processes:

IEXPLORE.EXEIEXPLORE.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\LowRegistry	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\InternetRegistry	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Zoom	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\IntelliForms	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "1"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\GPU	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Toolbar	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "423471466"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\PageSetup	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{10F29D41-20A9-11EF-8CD1-FA3492730900} = "0"	IEXPLORE.EXE

Modifies registry class 2 IoCs

Processes:

rundll32.exerundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_Classes\Local Settings	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Uni - Copy (20) - Copy.exeClient.exe

description pid process

Token: SeDebugPrivilege 2176 Uni - Copy (20) - Copy.exe
Token: SeDebugPrivilege 2868 Client.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

IEXPLORE.EXE

pid process

2900 IEXPLORE.EXE
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

Client.exeSKeKIygo2P3x.exeIEXPLORE.EXEIEXPLORE.EXE

pid process

2868 Client.exe
1760 SKeKIygo2P3x.exe
2900 IEXPLORE.EXE
2900 IEXPLORE.EXE
2336 IEXPLORE.EXE
2336 IEXPLORE.EXE

description	pid	process
Token: SeDebugPrivilege	2176	Uni - Copy (20) - Copy.exe
Token: SeDebugPrivilege	2868	Client.exe

pid	process
2900	IEXPLORE.EXE

pid	process
2868	Client.exe
1760	SKeKIygo2P3x.exe
2900	IEXPLORE.EXE
2900	IEXPLORE.EXE
2336	IEXPLORE.EXE
2336	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

Uni - Copy (20) - Copy.exeClient.exeiexplore.exeIEXPLORE.EXE

description	pid	process	target process
PID 2176 wrote to memory of 2636	2176	Uni - Copy (20) - Copy.exe	schtasks.exe
PID 2176 wrote to memory of 2636	2176	Uni - Copy (20) - Copy.exe	schtasks.exe
PID 2176 wrote to memory of 2636	2176	Uni - Copy (20) - Copy.exe	schtasks.exe
PID 2176 wrote to memory of 2636	2176	Uni - Copy (20) - Copy.exe	schtasks.exe
PID 2176 wrote to memory of 2868	2176	Uni - Copy (20) - Copy.exe	Client.exe
PID 2176 wrote to memory of 2868	2176	Uni - Copy (20) - Copy.exe	Client.exe
PID 2176 wrote to memory of 2868	2176	Uni - Copy (20) - Copy.exe	Client.exe
PID 2176 wrote to memory of 2868	2176	Uni - Copy (20) - Copy.exe	Client.exe
PID 2176 wrote to memory of 2868	2176	Uni - Copy (20) - Copy.exe	Client.exe
PID 2176 wrote to memory of 2868	2176	Uni - Copy (20) - Copy.exe	Client.exe
PID 2176 wrote to memory of 2868	2176	Uni - Copy (20) - Copy.exe	Client.exe
PID 2176 wrote to memory of 1536	2176	Uni - Copy (20) - Copy.exe	SCHTASKS.exe
PID 2176 wrote to memory of 1536	2176	Uni - Copy (20) - Copy.exe	SCHTASKS.exe
PID 2176 wrote to memory of 1536	2176	Uni - Copy (20) - Copy.exe	SCHTASKS.exe
PID 2176 wrote to memory of 1536	2176	Uni - Copy (20) - Copy.exe	SCHTASKS.exe
PID 2868 wrote to memory of 2508	2868	Client.exe	schtasks.exe
PID 2868 wrote to memory of 2508	2868	Client.exe	schtasks.exe
PID 2868 wrote to memory of 2508	2868	Client.exe	schtasks.exe
PID 2868 wrote to memory of 2508	2868	Client.exe	schtasks.exe
PID 2868 wrote to memory of 1760	2868	Client.exe	SKeKIygo2P3x.exe
PID 2868 wrote to memory of 1760	2868	Client.exe	SKeKIygo2P3x.exe
PID 2868 wrote to memory of 1760	2868	Client.exe	SKeKIygo2P3x.exe
PID 2868 wrote to memory of 1760	2868	Client.exe	SKeKIygo2P3x.exe
PID 1864 wrote to memory of 2900	1864	iexplore.exe	IEXPLORE.EXE
PID 1864 wrote to memory of 2900	1864	iexplore.exe	IEXPLORE.EXE
PID 1864 wrote to memory of 2900	1864	iexplore.exe	IEXPLORE.EXE
PID 1864 wrote to memory of 2900	1864	iexplore.exe	IEXPLORE.EXE
PID 2900 wrote to memory of 2336	2900	IEXPLORE.EXE	IEXPLORE.EXE
PID 2900 wrote to memory of 2336	2900	IEXPLORE.EXE	IEXPLORE.EXE
PID 2900 wrote to memory of 2336	2900	IEXPLORE.EXE	IEXPLORE.EXE
PID 2900 wrote to memory of 2336	2900	IEXPLORE.EXE	IEXPLORE.EXE
PID 2868 wrote to memory of 2976	2868	Client.exe	SCHTASKS.exe
PID 2868 wrote to memory of 2976	2868	Client.exe	SCHTASKS.exe
PID 2868 wrote to memory of 2976	2868	Client.exe	SCHTASKS.exe
PID 2868 wrote to memory of 2976	2868	Client.exe	SCHTASKS.exe

C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (20) - Copy.exe
"C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (20) - Copy.exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2176

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SeroXen" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (20) - Copy.exe" /rl HIGHEST /f
2⤵
- Quasar RAT
- Creates scheduled task(s)
PID:2636

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2868

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SeroXen" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2508

C:\Users\Admin\AppData\Local\Temp\SKeKIygo2P3x.exe
"C:\Users\Admin\AppData\Local\Temp\SKeKIygo2P3x.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1760

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77Client.exe" /tr "'C:\Users\Admin\AppData\Roaming\SubDir\Client.exe'" /sc onlogon /rl HIGHEST
3⤵
- Creates scheduled task(s)
PID:2976

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77Uni - Copy (20) - Copy.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (20) - Copy.exe'" /sc onlogon /rl HIGHEST
2⤵
- Creates scheduled task(s)
PID:1536

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\CheckpointMerge.lock
1⤵
- Modifies registry class
PID:1092

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\CheckpointMerge.lock
1⤵
- Modifies registry class
PID:1160

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe" -nohome
1⤵
- Suspicious use of WriteProcessMemory
PID:1864

C:\Program Files\Internet Explorer\IEXPLORE.EXE
"C:\Program Files\Internet Explorer\IEXPLORE.EXE" -nohome
2⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2900

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2900 CREDAT:275457 /prefetch:2
3⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:2336

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab9243.tmp
Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\Local\Temp\SKeKIygo2P3x.exe
Filesize
277KB

MD5
dac0c5b2380cbdd93b46763427c9f8df

SHA1
038089e1a0ac8375be797fc3ce7ae719abc72834

SHA256
d02538788fb57f568ece292f5fc20e9775c86d504de67f57e22534f84adc73c6

SHA512
05cc1f6bf25a6545a06c735ae7a4a7fc25489bdb9fbc8d5797be623982662c4a93cba2d20bfe14313ef1548eaaa691e55fabdd8e3d3e45de9ab42dc62f9a7023

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar9372.tmp
Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
\Users\Admin\AppData\Roaming\SubDir\Client.exe
Filesize
409KB

MD5
b70fdac25a99501e3cae11f1b775249e

SHA1
3c59226479bfdcd1b2927bcfb1a7516d4cb8dd71

SHA256
51ff3eb450a786c1aaa75ff889f2fd256412a7b75d04277fdf9fcccc20e57246

SHA512
43f0d5d6e5f0d5febba537c109ffdbc250bbb6e9725e635a43ec975b0353048eaeee50b6e9274cd5e072ea6b0cea32439bd37408b2528832f467f2075f74ca44

Download Submit
memory/2176-1-0x00000000001C0000-0x000000000022C000-memory.dmp

Filesize
432KB

Download
memory/2176-2-0x0000000074D50000-0x000000007543E000-memory.dmp

Filesize
6.9MB

Download
memory/2176-0-0x0000000074D5E000-0x0000000074D5F000-memory.dmp

Filesize
4KB

Download
memory/2176-13-0x0000000074D50000-0x000000007543E000-memory.dmp

Filesize
6.9MB

Download
memory/2868-12-0x0000000074D50000-0x000000007543E000-memory.dmp

Filesize
6.9MB

Download
memory/2868-16-0x0000000074D50000-0x000000007543E000-memory.dmp

Filesize
6.9MB

Download
memory/2868-28-0x0000000074D50000-0x000000007543E000-memory.dmp

Filesize
6.9MB

Download
memory/2868-15-0x0000000074D50000-0x000000007543E000-memory.dmp

Filesize
6.9MB

Download
memory/2868-11-0x0000000074D50000-0x000000007543E000-memory.dmp

Filesize
6.9MB

Download
memory/2868-10-0x0000000000350000-0x00000000003BC000-memory.dmp

Filesize
432KB

Download