quasar | fcd5b843d50ec2f973aaa27e54b6bf045931cc3cb8d9bea4edaade352fe0f7d5

Analysis

max time kernel
299s
max time network
290s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
02-06-2024 06:22

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General

Target

uni/Uni - Copy (2).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 3 IoCs
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Processes:

schtasks.exe

pid process

2748 schtasks.exe
2 ip-api.com
6 api.ipify.org

pid	process
2748	schtasks.exe
2	ip-api.com
6	api.ipify.org

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral23/memory/2172-1-0x00000000008E0000-0x000000000094C000-memory.dmp	family_quasar
\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
behavioral23/memory/2652-10-0x0000000001020000-0x000000000108C000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

Client.exeu1F8AyNk41Xv.exe

pid process

2652 Client.exe
1400 u1F8AyNk41Xv.exe
Loads dropped DLL 2 IoCs

Processes:

Uni - Copy (2).exeClient.exe

pid process

2172 Uni - Copy (2).exe
2652 Client.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

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

1868 SCHTASKS.exe
2748 schtasks.exe
2540 SCHTASKS.exe
624 schtasks.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

xpsrchvw.exe

pid process

1540 xpsrchvw.exe

pid	process
2652	Client.exe
1400	u1F8AyNk41Xv.exe

pid	process
2172	Uni - Copy (2).exe
2652	Client.exe

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

pid	process
1868	SCHTASKS.exe
2748	schtasks.exe
2540	SCHTASKS.exe
624	schtasks.exe

pid	process
1540	xpsrchvw.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

Uni - Copy (2).exeClient.exeAUDIODG.EXE

description	pid	process
Token: SeDebugPrivilege	2172	Uni - Copy (2).exe
Token: SeDebugPrivilege	2652	Client.exe
Token: 33	1180	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1180	AUDIODG.EXE
Token: 33	1180	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1180	AUDIODG.EXE

Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

Client.exeu1F8AyNk41Xv.exexpsrchvw.exe

pid process

2652 Client.exe
1400 u1F8AyNk41Xv.exe
1540 xpsrchvw.exe
1540 xpsrchvw.exe
1540 xpsrchvw.exe
1540 xpsrchvw.exe

pid	process
2652	Client.exe
1400	u1F8AyNk41Xv.exe
1540	xpsrchvw.exe
1540	xpsrchvw.exe
1540	xpsrchvw.exe
1540	xpsrchvw.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

Uni - Copy (2).exeClient.exe

description	pid	process	target process
PID 2172 wrote to memory of 2748	2172	Uni - Copy (2).exe	schtasks.exe
PID 2172 wrote to memory of 2748	2172	Uni - Copy (2).exe	schtasks.exe
PID 2172 wrote to memory of 2748	2172	Uni - Copy (2).exe	schtasks.exe
PID 2172 wrote to memory of 2748	2172	Uni - Copy (2).exe	schtasks.exe
PID 2172 wrote to memory of 2652	2172	Uni - Copy (2).exe	Client.exe
PID 2172 wrote to memory of 2652	2172	Uni - Copy (2).exe	Client.exe
PID 2172 wrote to memory of 2652	2172	Uni - Copy (2).exe	Client.exe
PID 2172 wrote to memory of 2652	2172	Uni - Copy (2).exe	Client.exe
PID 2172 wrote to memory of 2652	2172	Uni - Copy (2).exe	Client.exe
PID 2172 wrote to memory of 2652	2172	Uni - Copy (2).exe	Client.exe
PID 2172 wrote to memory of 2652	2172	Uni - Copy (2).exe	Client.exe
PID 2172 wrote to memory of 2540	2172	Uni - Copy (2).exe	SCHTASKS.exe
PID 2172 wrote to memory of 2540	2172	Uni - Copy (2).exe	SCHTASKS.exe
PID 2172 wrote to memory of 2540	2172	Uni - Copy (2).exe	SCHTASKS.exe
PID 2172 wrote to memory of 2540	2172	Uni - Copy (2).exe	SCHTASKS.exe
PID 2652 wrote to memory of 624	2652	Client.exe	schtasks.exe
PID 2652 wrote to memory of 624	2652	Client.exe	schtasks.exe
PID 2652 wrote to memory of 624	2652	Client.exe	schtasks.exe
PID 2652 wrote to memory of 624	2652	Client.exe	schtasks.exe
PID 2652 wrote to memory of 1400	2652	Client.exe	u1F8AyNk41Xv.exe
PID 2652 wrote to memory of 1400	2652	Client.exe	u1F8AyNk41Xv.exe
PID 2652 wrote to memory of 1400	2652	Client.exe	u1F8AyNk41Xv.exe
PID 2652 wrote to memory of 1400	2652	Client.exe	u1F8AyNk41Xv.exe
PID 2652 wrote to memory of 1868	2652	Client.exe	SCHTASKS.exe
PID 2652 wrote to memory of 1868	2652	Client.exe	SCHTASKS.exe
PID 2652 wrote to memory of 1868	2652	Client.exe	SCHTASKS.exe
PID 2652 wrote to memory of 1868	2652	Client.exe	SCHTASKS.exe

C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (2).exe
"C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (2).exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2172

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SeroXen" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (2).exe" /rl HIGHEST /f
2⤵
- Quasar RAT
- Creates scheduled task(s)
PID:2748

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:2652

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:624

C:\Users\Admin\AppData\Local\Temp\u1F8AyNk41Xv.exe
"C:\Users\Admin\AppData\Local\Temp\u1F8AyNk41Xv.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1400

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:1868

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77Uni - Copy (2).exe" /tr "'C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (2).exe'" /sc onlogon /rl HIGHEST
2⤵
- Creates scheduled task(s)
PID:2540

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x488
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1180

C:\Windows\System32\xpsrchvw.exe
"C:\Windows\System32\xpsrchvw.exe" "C:\Users\Admin\Desktop\UnprotectOut.xps"
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:1540

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\u1F8AyNk41Xv.exe
Filesize
277KB

MD5
dac0c5b2380cbdd93b46763427c9f8df

SHA1
038089e1a0ac8375be797fc3ce7ae719abc72834

SHA256
d02538788fb57f568ece292f5fc20e9775c86d504de67f57e22534f84adc73c6

SHA512
05cc1f6bf25a6545a06c735ae7a4a7fc25489bdb9fbc8d5797be623982662c4a93cba2d20bfe14313ef1548eaaa691e55fabdd8e3d3e45de9ab42dc62f9a7023

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

MD5
b70fdac25a99501e3cae11f1b775249e

SHA1
3c59226479bfdcd1b2927bcfb1a7516d4cb8dd71

SHA256
51ff3eb450a786c1aaa75ff889f2fd256412a7b75d04277fdf9fcccc20e57246

SHA512
43f0d5d6e5f0d5febba537c109ffdbc250bbb6e9725e635a43ec975b0353048eaeee50b6e9274cd5e072ea6b0cea32439bd37408b2528832f467f2075f74ca44

Download Submit
memory/2172-0-0x0000000073F8E000-0x0000000073F8F000-memory.dmp

Filesize
4KB

Download
memory/2172-1-0x00000000008E0000-0x000000000094C000-memory.dmp

Filesize
432KB

Download
memory/2172-2-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/2172-13-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/2652-10-0x0000000001020000-0x000000000108C000-memory.dmp

Filesize
432KB

Download
memory/2652-11-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/2652-12-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/2652-15-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/2652-16-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/2652-26-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download