quasar | fcd5b843d50ec2f973aaa27e54b6bf045931cc3cb8d9bea4edaade352fe0f7d5

Analysis

max time kernel
299s
max time network
290s
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 (13) - 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 3 IoCs
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Processes:

schtasks.exe

pid process

2088 schtasks.exe
13 ip-api.com
33 api.ipify.org

pid	process
2088	schtasks.exe
13	ip-api.com
33	api.ipify.org

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral8/memory/1456-1-0x0000000000A00000-0x0000000000A6C000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 2 IoCs

Processes:

Client.exeZD6VguKowD6S.exe

pid process

4972 Client.exe
4636 ZD6VguKowD6S.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

13 ip-api.com
33 api.ipify.org

flow	ioc
13	ip-api.com
33	api.ipify.org

Drops file in System32 directory 11 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.log	svchost.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.jtx	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSStmp.log	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSTokenDB2.jfm	svchost.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSTokenDB2.dat	svchost.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.chk	svchost.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.jcp	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSSres00001.jrs	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSSres00002.jrs	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.chk	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSTokenDB2.dat	svchost.exe

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 opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
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

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

4828 SCHTASKS.exe
2088 schtasks.exe
1836 SCHTASKS.exe
4528 schtasks.exe

pid	process
4828	SCHTASKS.exe
2088	schtasks.exe
1836	SCHTASKS.exe
4528	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE

Modifies registry class 1 IoCs

Processes:

mspaint.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000_Classes\Local Settings mspaint.exe
Suspicious behavior: AddClipboardFormatListener 4 IoCs

Processes:

WINWORD.EXEvlc.exevlc.exe

pid process

4788 WINWORD.EXE
4788 WINWORD.EXE
2400 vlc.exe
4824 vlc.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

mspaint.exe

pid process

2076 mspaint.exe
2076 mspaint.exe
Suspicious behavior: GetForegroundWindowSpam 2 IoCs

Processes:

vlc.exevlc.exe

pid process

2400 vlc.exe
4824 vlc.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000_Classes\Local Settings	mspaint.exe

pid	process
4788	WINWORD.EXE
4788	WINWORD.EXE
2400	vlc.exe
4824	vlc.exe

pid	process
2076	mspaint.exe
2076	mspaint.exe

pid	process
2400	vlc.exe
4824	vlc.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Uni - Copy (13) - Copy.exeClient.exeAUDIODG.EXE

description	pid	process
Token: SeDebugPrivilege	1456	Uni - Copy (13) - Copy.exe
Token: SeDebugPrivilege	4972	Client.exe
Token: 33	4992	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	4992	AUDIODG.EXE

Suspicious use of FindShellTrayWindow 9 IoCs

Processes:

vlc.exevlc.exe

pid process

2400 vlc.exe
2400 vlc.exe
2400 vlc.exe
2400 vlc.exe
2400 vlc.exe
4824 vlc.exe
4824 vlc.exe
4824 vlc.exe
2400 vlc.exe
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

vlc.exevlc.exe

pid process

2400 vlc.exe
2400 vlc.exe
4824 vlc.exe
4824 vlc.exe

pid	process
2400	vlc.exe
2400	vlc.exe
2400	vlc.exe
2400	vlc.exe
2400	vlc.exe
4824	vlc.exe
4824	vlc.exe
4824	vlc.exe
2400	vlc.exe

pid	process
2400	vlc.exe
2400	vlc.exe
4824	vlc.exe
4824	vlc.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

Client.exeZD6VguKowD6S.exemspaint.exeOpenWith.exeWINWORD.EXEvlc.exevlc.exe

pid	process
4972	Client.exe
4636	ZD6VguKowD6S.exe
2076	mspaint.exe
3640	OpenWith.exe
4788	WINWORD.EXE
4788	WINWORD.EXE
4788	WINWORD.EXE
4788	WINWORD.EXE
2400	vlc.exe
4788	WINWORD.EXE
4788	WINWORD.EXE
4824	vlc.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

Uni - Copy (13) - Copy.exeClient.exe

description	pid	process	target process
PID 1456 wrote to memory of 2088	1456	Uni - Copy (13) - Copy.exe	schtasks.exe
PID 1456 wrote to memory of 2088	1456	Uni - Copy (13) - Copy.exe	schtasks.exe
PID 1456 wrote to memory of 2088	1456	Uni - Copy (13) - Copy.exe	schtasks.exe
PID 1456 wrote to memory of 4972	1456	Uni - Copy (13) - Copy.exe	Client.exe
PID 1456 wrote to memory of 4972	1456	Uni - Copy (13) - Copy.exe	Client.exe
PID 1456 wrote to memory of 4972	1456	Uni - Copy (13) - Copy.exe	Client.exe
PID 1456 wrote to memory of 1836	1456	Uni - Copy (13) - Copy.exe	SCHTASKS.exe
PID 1456 wrote to memory of 1836	1456	Uni - Copy (13) - Copy.exe	SCHTASKS.exe
PID 1456 wrote to memory of 1836	1456	Uni - Copy (13) - Copy.exe	SCHTASKS.exe
PID 4972 wrote to memory of 4528	4972	Client.exe	schtasks.exe
PID 4972 wrote to memory of 4528	4972	Client.exe	schtasks.exe
PID 4972 wrote to memory of 4528	4972	Client.exe	schtasks.exe
PID 4972 wrote to memory of 4636	4972	Client.exe	ZD6VguKowD6S.exe
PID 4972 wrote to memory of 4636	4972	Client.exe	ZD6VguKowD6S.exe
PID 4972 wrote to memory of 4636	4972	Client.exe	ZD6VguKowD6S.exe
PID 4972 wrote to memory of 4828	4972	Client.exe	SCHTASKS.exe
PID 4972 wrote to memory of 4828	4972	Client.exe	SCHTASKS.exe
PID 4972 wrote to memory of 4828	4972	Client.exe	SCHTASKS.exe

C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (13) - Copy.exe
"C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (13) - Copy.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1456

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SeroXen" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (13) - Copy.exe" /rl HIGHEST /f
2⤵
- Quasar RAT
- Creates scheduled task(s)
PID:2088

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:4972

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:4528

C:\Users\Admin\AppData\Local\Temp\ZD6VguKowD6S.exe
"C:\Users\Admin\AppData\Local\Temp\ZD6VguKowD6S.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:4636

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:4828

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77Uni - Copy (13) - Copy.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (13) - Copy.exe'" /sc onlogon /rl HIGHEST
2⤵
- Creates scheduled task(s)
PID:1836

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x4b0 0x4e8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4992

C:\Windows\system32\mspaint.exe
"C:\Windows\system32\mspaint.exe" "C:\Users\Admin\Desktop\OutBlock.jpe" /ForceBootstrapPaint3D
1⤵
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:2076

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s DsSvc
1⤵
- Drops file in System32 directory
PID:4124

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Suspicious use of SetWindowsHookEx
PID:3640

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n /f "C:\Users\Admin\Desktop\EnableImport.dotx"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:4788

C:\Program Files\VideoLAN\VLC\vlc.exe
"C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\Desktop\RepairRemove.mov"
1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:2400

C:\Program Files\VideoLAN\VLC\vlc.exe
"C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\Desktop\RepairRemove.mov"
1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:4824

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\ZD6VguKowD6S.exe
Filesize
277KB

MD5
dac0c5b2380cbdd93b46763427c9f8df

SHA1
038089e1a0ac8375be797fc3ce7ae719abc72834

SHA256
d02538788fb57f568ece292f5fc20e9775c86d504de67f57e22534f84adc73c6

SHA512
05cc1f6bf25a6545a06c735ae7a4a7fc25489bdb9fbc8d5797be623982662c4a93cba2d20bfe14313ef1548eaaa691e55fabdd8e3d3e45de9ab42dc62f9a7023

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

MD5
b70fdac25a99501e3cae11f1b775249e

SHA1
3c59226479bfdcd1b2927bcfb1a7516d4cb8dd71

SHA256
51ff3eb450a786c1aaa75ff889f2fd256412a7b75d04277fdf9fcccc20e57246

SHA512
43f0d5d6e5f0d5febba537c109ffdbc250bbb6e9725e635a43ec975b0353048eaeee50b6e9274cd5e072ea6b0cea32439bd37408b2528832f467f2075f74ca44

Download Submit
memory/1456-15-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/1456-1-0x0000000000A00000-0x0000000000A6C000-memory.dmp

Filesize
432KB

Download
memory/1456-2-0x00000000058F0000-0x0000000005E94000-memory.dmp

Filesize
5.6MB

Download
memory/1456-3-0x00000000054E0000-0x0000000005572000-memory.dmp

Filesize
584KB

Download
memory/1456-4-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/1456-5-0x0000000005440000-0x00000000054A6000-memory.dmp

Filesize
408KB

Download
memory/1456-6-0x00000000058A0000-0x00000000058B2000-memory.dmp

Filesize
72KB

Download
memory/1456-0-0x00000000748BE000-0x00000000748BF000-memory.dmp

Filesize
4KB

Download
memory/2400-80-0x00007FF801930000-0x00007FF80194D000-memory.dmp

Filesize
116KB

Download
memory/2400-85-0x00007FF800040000-0x00007FF800058000-memory.dmp

Filesize
96KB

Download
memory/2400-76-0x00007FF810960000-0x00007FF810977000-memory.dmp

Filesize
92KB

Download
memory/2400-77-0x00007FF80FA30000-0x00007FF80FA41000-memory.dmp

Filesize
68KB

Download
memory/2400-78-0x00007FF80E3E0000-0x00007FF80E3F7000-memory.dmp

Filesize
92KB

Download
memory/2400-72-0x00007FF616C50000-0x00007FF616D48000-memory.dmp

Filesize
992KB

Download
memory/2400-88-0x00007FFFF15B0000-0x00007FFFF2660000-memory.dmp

Filesize
16.7MB

Download
memory/2400-75-0x00007FF811420000-0x00007FF811438000-memory.dmp

Filesize
96KB

Download
memory/2400-89-0x00007FFFFA5C0000-0x00007FFFFA5D1000-memory.dmp

Filesize
68KB

Download
memory/2400-74-0x00007FFFF7370000-0x00007FFFF7626000-memory.dmp

Filesize
2.7MB

Download
memory/2400-86-0x00007FF800020000-0x00007FF800031000-memory.dmp

Filesize
68KB

Download
memory/2400-87-0x00007FF800000000-0x00007FF800011000-memory.dmp

Filesize
68KB

Download
memory/2400-73-0x00007FF801950000-0x00007FF801984000-memory.dmp

Filesize
208KB

Download
memory/2400-84-0x00007FF8014D0000-0x00007FF8014F1000-memory.dmp

Filesize
132KB

Download
memory/2400-83-0x00007FF800A30000-0x00007FF800A71000-memory.dmp

Filesize
260KB

Download
memory/2400-79-0x00007FF801F90000-0x00007FF801FA1000-memory.dmp

Filesize
68KB

Download
memory/2400-106-0x00007FFFF15B0000-0x00007FFFF2660000-memory.dmp

Filesize
16.7MB

Download
memory/2400-82-0x00007FFFF6100000-0x00007FFFF630B000-memory.dmp

Filesize
2.0MB

Download
memory/2400-81-0x00007FF801500000-0x00007FF801511000-memory.dmp

Filesize
68KB

Download
memory/4124-29-0x00000215ECF60000-0x00000215ECF70000-memory.dmp

Filesize
64KB

Download
memory/4124-47-0x00000215F5C00000-0x00000215F5C01000-memory.dmp

Filesize
4KB

Download
memory/4124-48-0x00000215F5C00000-0x00000215F5C01000-memory.dmp

Filesize
4KB

Download
memory/4124-44-0x00000215F5B60000-0x00000215F5B61000-memory.dmp

Filesize
4KB

Download
memory/4124-46-0x00000215F5BF0000-0x00000215F5BF1000-memory.dmp

Filesize
4KB

Download
memory/4124-45-0x00000215F5BF0000-0x00000215F5BF1000-memory.dmp

Filesize
4KB

Download
memory/4124-42-0x00000215F5B60000-0x00000215F5B61000-memory.dmp

Filesize
4KB

Download
memory/4124-40-0x00000215F5AE0000-0x00000215F5AE1000-memory.dmp

Filesize
4KB

Download
memory/4124-33-0x00000215ECFA0000-0x00000215ECFB0000-memory.dmp

Filesize
64KB

Download
memory/4788-54-0x00007FF7DF150000-0x00007FF7DF160000-memory.dmp

Filesize
64KB

Download
memory/4788-56-0x00007FF7DCAB0000-0x00007FF7DCAC0000-memory.dmp

Filesize
64KB

Download
memory/4788-55-0x00007FF7DCAB0000-0x00007FF7DCAC0000-memory.dmp

Filesize
64KB

Download
memory/4788-50-0x00007FF7DF150000-0x00007FF7DF160000-memory.dmp

Filesize
64KB

Download
memory/4788-51-0x00007FF7DF150000-0x00007FF7DF160000-memory.dmp

Filesize
64KB

Download
memory/4788-52-0x00007FF7DF150000-0x00007FF7DF160000-memory.dmp

Filesize
64KB

Download
memory/4788-53-0x00007FF7DF150000-0x00007FF7DF160000-memory.dmp

Filesize
64KB

Download
memory/4972-20-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/4972-19-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/4972-18-0x0000000006800000-0x000000000680A000-memory.dmp

Filesize
40KB

Download
memory/4972-16-0x0000000006330000-0x000000000636C000-memory.dmp

Filesize
240KB

Download
memory/4972-13-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/4972-12-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/4972-184-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download