quasar | 018f75f18b882044109f250f19da654c0b3bd90430b318fcb03348908a189aae

General

Target

loadervmp.exe
Size

409KB
MD5

14f056491baaed04872533c2d9648d46
SHA1

c48b08d0e9064f2d060f19474bb54cf3c5a25586
SHA256

018f75f18b882044109f250f19da654c0b3bd90430b318fcb03348908a189aae
SHA512

c109b1a9cf40049f8958beab9cff112cb326dd719c56f6dedafda4cf3a64d3faae3912f34cbcc1ee203a0316e40b8f7016624f05a1ad6c93bbaa0bdc9dc79b08
SSDEEP

6144:rMvlpdRJjGq/ldSTTIgiGwo9W0MFMJyb7+Ye0SmxalGcqwL6Ir4H9VI:EpbJjGu/STTIwJWIJgG0jFCRsH9VI

Score

10^/10

quasar seroxen persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen

C2

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

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

Mutex

$Sxr-rpL8EItHN3pqIQQVy2

Attributes

encryption_key
ZJpQQkxTrak9Zs9tUOQW
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
SeroXen
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2780-1-0x0000000000E30000-0x0000000000E9C000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

WaaSMedicAgent.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\DoSvc\ImagePath = "C:\\Windows\\System32\\svchost.exe -k NetworkService -p"	WaaSMedicAgent.exe

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

4476 Client.exe

pid	process
4476	Client.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

loadervmp.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SeroXen = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\loadervmp.exe\""	loadervmp.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

39 ip-api.com
Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exeSCHTASKS.exe

pid process

220 schtasks.exe
1612 schtasks.exe
1860 SCHTASKS.exe

flow	ioc
39	ip-api.com

pid	process
220	schtasks.exe
1612	schtasks.exe
1860	SCHTASKS.exe

Modifies data under HKEY_USERS 41 IoCs

Processes:

WaaSMedicAgent.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

loadervmp.exeClient.exe

description pid process

Token: SeDebugPrivilege 2780 loadervmp.exe
Token: SeDebugPrivilege 4476 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

4476 Client.exe

description	pid	process
Token: SeDebugPrivilege	2780	loadervmp.exe
Token: SeDebugPrivilege	4476	Client.exe

pid	process
4476	Client.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

loadervmp.exeClient.exe

description	pid	process	target process
PID 2780 wrote to memory of 220	2780	loadervmp.exe	schtasks.exe
PID 2780 wrote to memory of 220	2780	loadervmp.exe	schtasks.exe
PID 2780 wrote to memory of 220	2780	loadervmp.exe	schtasks.exe
PID 2780 wrote to memory of 4476	2780	loadervmp.exe	Client.exe
PID 2780 wrote to memory of 4476	2780	loadervmp.exe	Client.exe
PID 2780 wrote to memory of 4476	2780	loadervmp.exe	Client.exe
PID 4476 wrote to memory of 1612	4476	Client.exe	schtasks.exe
PID 4476 wrote to memory of 1612	4476	Client.exe	schtasks.exe
PID 4476 wrote to memory of 1612	4476	Client.exe	schtasks.exe
PID 2780 wrote to memory of 1860	2780	loadervmp.exe	SCHTASKS.exe
PID 2780 wrote to memory of 1860	2780	loadervmp.exe	SCHTASKS.exe
PID 2780 wrote to memory of 1860	2780	loadervmp.exe	SCHTASKS.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\loadervmp.exe
"C:\Users\Admin\AppData\Local\Temp\loadervmp.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2780

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SeroXen" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\loadervmp.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:220

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:4476

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:1612

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77loadervmp.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\loadervmp.exe'" /sc onlogon /rl HIGHEST
2⤵
- Creates scheduled task(s)
PID:1860

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4264 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
1⤵
PID:4676

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe 190bcd77fcf2b730eaaef46532c95b17 vz1rON6qgkml5DAGlrVk4A.0.1.0.0.0
1⤵
- Sets service image path in registry
- Modifies data under HKEY_USERS
PID:2044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
409KB

MD5
14f056491baaed04872533c2d9648d46

SHA1
c48b08d0e9064f2d060f19474bb54cf3c5a25586

SHA256
018f75f18b882044109f250f19da654c0b3bd90430b318fcb03348908a189aae

SHA512
c109b1a9cf40049f8958beab9cff112cb326dd719c56f6dedafda4cf3a64d3faae3912f34cbcc1ee203a0316e40b8f7016624f05a1ad6c93bbaa0bdc9dc79b08

Download Submit
memory/2780-8-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/2780-7-0x00000000068C0000-0x00000000068D2000-memory.dmp

Filesize
72KB

Download
memory/2780-3-0x00000000058E0000-0x0000000005972000-memory.dmp

Filesize
584KB

Download
memory/2780-4-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/2780-9-0x0000000006D00000-0x0000000006D3C000-memory.dmp

Filesize
240KB

Download
memory/2780-6-0x0000000005980000-0x00000000059E6000-memory.dmp

Filesize
408KB

Download
memory/2780-2-0x0000000005DF0000-0x0000000006394000-memory.dmp

Filesize
5.6MB

Download
memory/2780-0-0x0000000074F7E000-0x0000000074F7F000-memory.dmp

Filesize
4KB

Download
memory/2780-5-0x0000000074F7E000-0x0000000074F7F000-memory.dmp

Filesize
4KB

Download
memory/2780-1-0x0000000000E30000-0x0000000000E9C000-memory.dmp

Filesize
432KB

Download
memory/2780-20-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/4476-16-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/4476-19-0x0000000006D20000-0x0000000006D2A000-memory.dmp

Filesize
40KB

Download
memory/4476-15-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/4476-21-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/4476-22-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads