quasar | fcd5b843d50ec2f973aaa27e54b6bf045931cc3cb8d9bea4edaade352fe0f7d5

Analysis

max time kernel
295s
max time network
289s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-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

2340 schtasks.exe
11 ip-api.com
34 api.ipify.org

pid	process
2340	schtasks.exe
11	ip-api.com
34	api.ipify.org

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral24/memory/1464-1-0x0000000000670000-0x00000000006DC000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 2 IoCs

Processes:

Client.exeTv5xIAZYFyji.exe

pid process

2228 Client.exe
856 Tv5xIAZYFyji.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

11 ip-api.com
34 api.ipify.org

pid	process
2228	Client.exe
856	Tv5xIAZYFyji.exe

flow	ioc
11	ip-api.com
34	api.ipify.org

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE

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

2340 schtasks.exe
696 SCHTASKS.exe
908 schtasks.exe
5812 SCHTASKS.exe

pid	process
2340	schtasks.exe
696	SCHTASKS.exe
908	schtasks.exe
5812	SCHTASKS.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid process

804 WINWORD.EXE
804 WINWORD.EXE

pid	process
804	WINWORD.EXE
804	WINWORD.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

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

description	pid	process
Token: SeDebugPrivilege	1464	Uni - Copy (2).exe
Token: SeDebugPrivilege	2228	Client.exe
Token: 33	4436	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	4436	AUDIODG.EXE

Suspicious use of SetWindowsHookEx 9 IoCs

Processes:

Client.exeTv5xIAZYFyji.exeWINWORD.EXE

pid process

2228 Client.exe
856 Tv5xIAZYFyji.exe
804 WINWORD.EXE
804 WINWORD.EXE
804 WINWORD.EXE
804 WINWORD.EXE
804 WINWORD.EXE
804 WINWORD.EXE
804 WINWORD.EXE

pid	process
2228	Client.exe
856	Tv5xIAZYFyji.exe
804	WINWORD.EXE
804	WINWORD.EXE
804	WINWORD.EXE
804	WINWORD.EXE
804	WINWORD.EXE
804	WINWORD.EXE
804	WINWORD.EXE

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

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

description	pid	process	target process
PID 1464 wrote to memory of 2340	1464	Uni - Copy (2).exe	schtasks.exe
PID 1464 wrote to memory of 2340	1464	Uni - Copy (2).exe	schtasks.exe
PID 1464 wrote to memory of 2340	1464	Uni - Copy (2).exe	schtasks.exe
PID 1464 wrote to memory of 2228	1464	Uni - Copy (2).exe	Client.exe
PID 1464 wrote to memory of 2228	1464	Uni - Copy (2).exe	Client.exe
PID 1464 wrote to memory of 2228	1464	Uni - Copy (2).exe	Client.exe
PID 1464 wrote to memory of 696	1464	Uni - Copy (2).exe	SCHTASKS.exe
PID 1464 wrote to memory of 696	1464	Uni - Copy (2).exe	SCHTASKS.exe
PID 1464 wrote to memory of 696	1464	Uni - Copy (2).exe	SCHTASKS.exe
PID 2228 wrote to memory of 908	2228	Client.exe	schtasks.exe
PID 2228 wrote to memory of 908	2228	Client.exe	schtasks.exe
PID 2228 wrote to memory of 908	2228	Client.exe	schtasks.exe
PID 2228 wrote to memory of 856	2228	Client.exe	Tv5xIAZYFyji.exe
PID 2228 wrote to memory of 856	2228	Client.exe	Tv5xIAZYFyji.exe
PID 2228 wrote to memory of 856	2228	Client.exe	Tv5xIAZYFyji.exe
PID 804 wrote to memory of 3300	804	WINWORD.EXE	splwow64.exe
PID 804 wrote to memory of 3300	804	WINWORD.EXE	splwow64.exe
PID 2228 wrote to memory of 5812	2228	Client.exe	SCHTASKS.exe
PID 2228 wrote to memory of 5812	2228	Client.exe	SCHTASKS.exe
PID 2228 wrote to memory of 5812	2228	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⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1464

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:2340

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2228

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:908

C:\Users\Admin\AppData\Local\Temp\Tv5xIAZYFyji.exe
"C:\Users\Admin\AppData\Local\Temp\Tv5xIAZYFyji.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:856

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:5812

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:696

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x408 0x49c
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4436

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Documents\Are.docx" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:804

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:3300

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
1⤵
PID:5588

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\TCDAC3F.tmp\sist02.xsl
Filesize
245KB

MD5
f883b260a8d67082ea895c14bf56dd56

SHA1
7954565c1f243d46ad3b1e2f1baf3281451fc14b

SHA256
ef4835db41a485b56c2ef0ff7094bc2350460573a686182bc45fd6613480e353

SHA512
d95924a499f32d9b4d9a7d298502181f9e9048c21dbe0496fa3c3279b263d6f7d594b859111a99b1a53bd248ee69b867d7b1768c42e1e40934e0b990f0ce051e

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tv5xIAZYFyji.exe
Filesize
277KB

MD5
dac0c5b2380cbdd93b46763427c9f8df

SHA1
038089e1a0ac8375be797fc3ce7ae719abc72834

SHA256
d02538788fb57f568ece292f5fc20e9775c86d504de67f57e22534f84adc73c6

SHA512
05cc1f6bf25a6545a06c735ae7a4a7fc25489bdb9fbc8d5797be623982662c4a93cba2d20bfe14313ef1548eaaa691e55fabdd8e3d3e45de9ab42dc62f9a7023

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Document Building Blocks\1033\16\Built-In Building Blocks.dotx
Filesize
3.5MB

MD5
45b3206b0a14eb850f21a52116f021ea

SHA1
f287403bed53875136f30a99350e90b93772b9c3

SHA256
c6407f48bae9ff72044f64b06622076a84d9e8f36a9e0f4f0632a5e644adb6aa

SHA512
13cd2891e896257271d6a1263295716855847cfd55cbe05c9420b1c4ea677f6535596888695e79ad5918ea1d01984a9482a717b86f6de4e064bb8bc154a6f80c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Office\Recent\index.dat
Filesize
202B

MD5
add56ec49f8f478e84a934606effef1c

SHA1
1262ae87ef755e40752740df90d21352d5fc81ec

SHA256
22e509cf2b7202fc6b04c3d9a1b137477f11471d58a48c1f9514f89450217327

SHA512
c095f193d221696f3b087c3f224a559ad0efe4852a5392c8a3ab03f80183beec2a8327892aa481c85f1bf8165b76a029555f250e0dd5f396c823feacff4c06f1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\fb3b0dbfee58fac8.customDestinations-ms
Filesize
3KB

MD5
2e2fa28fc19f60eb08e4e51bff823129

SHA1
430716dc57be39372581028da8f45d4a2cb36f20

SHA256
fb873bd79fa9fad8e8e4ba2f060bacd1d85c49f395ef30cfe517fcdb08d73f56

SHA512
9b08edbe265d7e15bab43321c798f2be9a6a16ce17ac3fc22f8f6968365e61f07416dda99666bef3f1c0e860366211fa93063a2ccbe16e9ddab769d3f25c0a9c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\fb3b0dbfee58fac8.customDestinations-ms
Filesize
3KB

MD5
0d3b35e187fe3b20630a051a471c1c5b

SHA1
d1bf170ccb7ae7b5e6abe0f2b196dbf9ef9e786b

SHA256
6c330d161ae8938d81af32c4546fe4dd5c03436d7d9ef6ba40d045dab2fd13fa

SHA512
622ab67b4769d1b9b645604f8cd79bcf61ceaa3e04930b3193fffbba09eaf2838f867dc705eb90aa653ce13b944b7ef986e132f7e737b122baad681f9607f695

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

MD5
b70fdac25a99501e3cae11f1b775249e

SHA1
3c59226479bfdcd1b2927bcfb1a7516d4cb8dd71

SHA256
51ff3eb450a786c1aaa75ff889f2fd256412a7b75d04277fdf9fcccc20e57246

SHA512
43f0d5d6e5f0d5febba537c109ffdbc250bbb6e9725e635a43ec975b0353048eaeee50b6e9274cd5e072ea6b0cea32439bd37408b2528832f467f2075f74ca44

Download Submit
memory/804-34-0x00007FFCE46E0000-0x00007FFCE46F0000-memory.dmp

Filesize
64KB

Download
memory/804-29-0x00007FFCE6E30000-0x00007FFCE6E40000-memory.dmp

Filesize
64KB

Download
memory/804-35-0x00007FFCE46E0000-0x00007FFCE46F0000-memory.dmp

Filesize
64KB

Download
memory/804-33-0x00007FFCE6E30000-0x00007FFCE6E40000-memory.dmp

Filesize
64KB

Download
memory/804-32-0x00007FFCE6E30000-0x00007FFCE6E40000-memory.dmp

Filesize
64KB

Download
memory/804-31-0x00007FFCE6E30000-0x00007FFCE6E40000-memory.dmp

Filesize
64KB

Download
memory/804-30-0x00007FFCE6E30000-0x00007FFCE6E40000-memory.dmp

Filesize
64KB

Download
memory/1464-5-0x0000000005230000-0x0000000005296000-memory.dmp

Filesize
408KB

Download
memory/1464-4-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/1464-1-0x0000000000670000-0x00000000006DC000-memory.dmp

Filesize
432KB

Download
memory/1464-2-0x00000000056A0000-0x0000000005C44000-memory.dmp

Filesize
5.6MB

Download
memory/1464-3-0x0000000005190000-0x0000000005222000-memory.dmp

Filesize
584KB

Download
memory/1464-6-0x0000000005640000-0x0000000005652000-memory.dmp

Filesize
72KB

Download
memory/1464-15-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/1464-0-0x0000000074E3E000-0x0000000074E3F000-memory.dmp

Filesize
4KB

Download
memory/2228-13-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/2228-12-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/2228-17-0x0000000006B60000-0x0000000006B6A000-memory.dmp

Filesize
40KB

Download
memory/2228-18-0x0000000006E70000-0x0000000006EAC000-memory.dmp

Filesize
240KB

Download
memory/2228-19-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/2228-20-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/2228-564-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download