quasar | fcd5b843d50ec2f973aaa27e54b6bf045931cc3cb8d9bea4edaade352fe0f7d5

Analysis

max time kernel
298s
max time network
289s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
02-06-2024 06:22

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General

Target

uni/Uni - Copy (2) - Copy.exe
Size

409KB
MD5

b70fdac25a99501e3cae11f1b775249e
SHA1

3c59226479bfdcd1b2927bcfb1a7516d4cb8dd71
SHA256

51ff3eb450a786c1aaa75ff889f2fd256412a7b75d04277fdf9fcccc20e57246
SHA512

43f0d5d6e5f0d5febba537c109ffdbc250bbb6e9725e635a43ec975b0353048eaeee50b6e9274cd5e072ea6b0cea32439bd37408b2528832f467f2075f74ca44
SSDEEP

12288:gpbJjGut6AoE3hVVdFaC/eZPTMTDlpgfJCKuMsVs:oVaurMLcDlpRKai

Score

10^/10

quasar seroxen persistence 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 3 IoCs
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Processes:

schtasks.exe

flow ioc

2 ip-api.com
2696 schtasks.exe
6 api.ipify.org

flow	ioc
2	ip-api.com
2696	schtasks.exe
6	api.ipify.org

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral21/memory/2320-1-0x00000000003A0000-0x000000000040C000-memory.dmp	family_quasar
behavioral21/memory/2544-10-0x0000000000900000-0x000000000096C000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 2 IoCs

Processes:

Client.exejbZZ3pkr96Rn.exe

pid process

2544 Client.exe
1936 jbZZ3pkr96Rn.exe
Loads dropped DLL 2 IoCs

Processes:

Uni - Copy (2) - Copy.exeClient.exe

pid process

2320 Uni - Copy (2) - Copy.exe
2544 Client.exe

pid	process
2320	Uni - Copy (2) - Copy.exe
2544	Client.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

sidebar.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Windows\CurrentVersion\Run\Sidebar = "C:\\Program Files\\Windows Sidebar\\sidebar.exe /autoRun"	sidebar.exe

Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

6 api.ipify.org
2 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

2532 SCHTASKS.exe
2516 schtasks.exe
2752 SCHTASKS.exe
2696 schtasks.exe
Modifies Internet Explorer settings 1 TTPs 1 IoCs
adware spyware

Modify Registry
T1112

Processes:

sidebar.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Internet Explorer\Main sidebar.exe
Modifies registry class 1 IoCs

Processes:

rundll32.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_Classes\Local Settings rundll32.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

sidebar.exe

pid process

1592 sidebar.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2664 AcroRd32.exe

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

pid	process
2532	SCHTASKS.exe
2516	schtasks.exe
2752	SCHTASKS.exe
2696	schtasks.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Internet Explorer\Main	sidebar.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_Classes\Local Settings	rundll32.exe

pid	process
1592	sidebar.exe

pid	process
2664	AcroRd32.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

Uni - Copy (2) - Copy.exeClient.exeAUDIODG.EXEsidebar.exe

description	pid	process
Token: SeDebugPrivilege	2320	Uni - Copy (2) - Copy.exe
Token: SeDebugPrivilege	2544	Client.exe
Token: 33	2348	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2348	AUDIODG.EXE
Token: 33	2348	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2348	AUDIODG.EXE
Token: SeDebugPrivilege	1592	sidebar.exe

Suspicious use of SetWindowsHookEx 20 IoCs

Processes:

Client.exejbZZ3pkr96Rn.exeAcroRd32.exe

pid	process
2544	Client.exe
1936	jbZZ3pkr96Rn.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe
2664	AcroRd32.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

Uni - Copy (2) - Copy.exeClient.exe

description	pid	process	target process
PID 2320 wrote to memory of 2696	2320	Uni - Copy (2) - Copy.exe	schtasks.exe
PID 2320 wrote to memory of 2696	2320	Uni - Copy (2) - Copy.exe	schtasks.exe
PID 2320 wrote to memory of 2696	2320	Uni - Copy (2) - Copy.exe	schtasks.exe
PID 2320 wrote to memory of 2696	2320	Uni - Copy (2) - Copy.exe	schtasks.exe
PID 2320 wrote to memory of 2544	2320	Uni - Copy (2) - Copy.exe	Client.exe
PID 2320 wrote to memory of 2544	2320	Uni - Copy (2) - Copy.exe	Client.exe
PID 2320 wrote to memory of 2544	2320	Uni - Copy (2) - Copy.exe	Client.exe
PID 2320 wrote to memory of 2544	2320	Uni - Copy (2) - Copy.exe	Client.exe
PID 2320 wrote to memory of 2544	2320	Uni - Copy (2) - Copy.exe	Client.exe
PID 2320 wrote to memory of 2544	2320	Uni - Copy (2) - Copy.exe	Client.exe
PID 2320 wrote to memory of 2544	2320	Uni - Copy (2) - Copy.exe	Client.exe
PID 2320 wrote to memory of 2532	2320	Uni - Copy (2) - Copy.exe	SCHTASKS.exe
PID 2320 wrote to memory of 2532	2320	Uni - Copy (2) - Copy.exe	SCHTASKS.exe
PID 2320 wrote to memory of 2532	2320	Uni - Copy (2) - Copy.exe	SCHTASKS.exe
PID 2320 wrote to memory of 2532	2320	Uni - Copy (2) - Copy.exe	SCHTASKS.exe
PID 2544 wrote to memory of 2516	2544	Client.exe	schtasks.exe
PID 2544 wrote to memory of 2516	2544	Client.exe	schtasks.exe
PID 2544 wrote to memory of 2516	2544	Client.exe	schtasks.exe
PID 2544 wrote to memory of 2516	2544	Client.exe	schtasks.exe
PID 2544 wrote to memory of 1936	2544	Client.exe	jbZZ3pkr96Rn.exe
PID 2544 wrote to memory of 1936	2544	Client.exe	jbZZ3pkr96Rn.exe
PID 2544 wrote to memory of 1936	2544	Client.exe	jbZZ3pkr96Rn.exe
PID 2544 wrote to memory of 1936	2544	Client.exe	jbZZ3pkr96Rn.exe
PID 2544 wrote to memory of 2752	2544	Client.exe	SCHTASKS.exe
PID 2544 wrote to memory of 2752	2544	Client.exe	SCHTASKS.exe
PID 2544 wrote to memory of 2752	2544	Client.exe	SCHTASKS.exe
PID 2544 wrote to memory of 2752	2544	Client.exe	SCHTASKS.exe

C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (2) - Copy.exe
"C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (2) - Copy.exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2320

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SeroXen" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (2) - Copy.exe" /rl HIGHEST /f
2⤵
- Quasar RAT
- Creates scheduled task(s)
PID:2696

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:2544

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:2516

C:\Users\Admin\AppData\Local\Temp\jbZZ3pkr96Rn.exe
"C:\Users\Admin\AppData\Local\Temp\jbZZ3pkr96Rn.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1936

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:2752

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77Uni - Copy (2) - Copy.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (2) - Copy.exe'" /sc onlogon /rl HIGHEST
2⤵
- Creates scheduled task(s)
PID:2532

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x584
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2348

C:\Program Files\Windows Sidebar\sidebar.exe
"C:\Program Files\Windows Sidebar\sidebar.exe" /showGadgets
1⤵
- Adds Run key to start application
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1592

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\CompressAdd.vsdx
1⤵
- Modifies registry class
PID:2676

C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe"
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2664

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows Sidebar\Settings.ini
Filesize
2KB

MD5
3f26cb17871c7e267b7235ec6e81c562

SHA1
9707ee40001ef6e1442bb6ede31e6851b4e67532

SHA256
21246d3a269cf91e2ee67cf1f5ee9568261a6ca4184879db9bc718b3d40ad9fa

SHA512
6fe7b12eaff94ff179f845b51f5ee43bde0cc1570b23f2a5002896d13d015ca98a3b0c059a68d18f4f4a5f5e57dd04ebf86b15ba43a408eeaaa95bc82250cf05

Download Submit
C:\Users\Admin\AppData\Local\Temp\jbZZ3pkr96Rn.exe
Filesize
277KB

MD5
dac0c5b2380cbdd93b46763427c9f8df

SHA1
038089e1a0ac8375be797fc3ce7ae719abc72834

SHA256
d02538788fb57f568ece292f5fc20e9775c86d504de67f57e22534f84adc73c6

SHA512
05cc1f6bf25a6545a06c735ae7a4a7fc25489bdb9fbc8d5797be623982662c4a93cba2d20bfe14313ef1548eaaa691e55fabdd8e3d3e45de9ab42dc62f9a7023

Download Submit
C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents
Filesize
3KB

MD5
62df5fbe41bc942e26d804935bbc744f

SHA1
e0f229b5dd55435734ba7f6d274909feed7602a6

SHA256
a376279cca9dde5e557a016cd0f69a524275933cae12660ba01a0c97f13402f1

SHA512
24f3eb73a92f1c059ac01fbaa06ff5f94970383d645e6dd49cc8f29d347d7e0ccc27af5543ca41719140250a29dcf655b0fe8d722ffa3d9abca988c7ebd25023

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

MD5
b70fdac25a99501e3cae11f1b775249e

SHA1
3c59226479bfdcd1b2927bcfb1a7516d4cb8dd71

SHA256
51ff3eb450a786c1aaa75ff889f2fd256412a7b75d04277fdf9fcccc20e57246

SHA512
43f0d5d6e5f0d5febba537c109ffdbc250bbb6e9725e635a43ec975b0353048eaeee50b6e9274cd5e072ea6b0cea32439bd37408b2528832f467f2075f74ca44

Download Submit
memory/2320-1-0x00000000003A0000-0x000000000040C000-memory.dmp

Filesize
432KB

Download
memory/2320-2-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2320-0-0x000000007408E000-0x000000007408F000-memory.dmp

Filesize
4KB

Download
memory/2320-13-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2544-11-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2544-16-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2544-15-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2544-12-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2544-10-0x0000000000900000-0x000000000096C000-memory.dmp

Filesize
432KB

Download
memory/2544-98-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download