quasar | 5416eb9ce7028292f5810ab8acec85ab7cd55503bcdf097f3e2ce2a900577797

General

Target

SeroXenLauncher.exe
Size

409KB
MD5

54d920888e6066870191f44fe0b27206
SHA1

87feb8a460dd1dc736fc96fbfbe37bf67aed2c3e
SHA256

5416eb9ce7028292f5810ab8acec85ab7cd55503bcdf097f3e2ce2a900577797
SHA512

4b23903103954c5d491eedc1c77fec1fea32552b9b863ada312b75388a9a56d38573851d2f6edaf61444fb0549196b1e9310cb6fa4e1773b9bf65291d5e2f72d
SSDEEP

6144:EM7Cp8XlizQNOa/YzLU+RefWtEOag0vQUvb3pOMZ97iJcfaohEt2+4nQQ:4pQl4QR/2LU+RefW7qg27iC+t0nQQ

Score

10^/10

quasar seroxen spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen

C2

127.0.0.1:4782

browser-julia.gl.at.ply.gg:54488

Mutex

$Sxr-GV6wZsGZZMeZ3qfenc

Attributes

encryption_key
KH74MFPau2OXY0OqPzU8
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/2164-1-0x0000000000460000-0x00000000004CC000-memory.dmp	family_quasar
behavioral2/files/0x0002000000022f1f-10.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3412	Client.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.

flow	ioc
7	ip-api.com

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\SubDir\Client.exe	SeroXenLauncher.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\Client.exe	SeroXenLauncher.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2360	schtasks.exe
640	schtasks.exe
4916	SCHTASKS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2164	SeroXenLauncher.exe
Token: SeDebugPrivilege	3412	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3412	Client.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2164 wrote to memory of 640	2164	SeroXenLauncher.exe	86
PID 2164 wrote to memory of 640	2164	SeroXenLauncher.exe	86
PID 2164 wrote to memory of 640	2164	SeroXenLauncher.exe	86
PID 2164 wrote to memory of 3412	2164	SeroXenLauncher.exe	88
PID 2164 wrote to memory of 3412	2164	SeroXenLauncher.exe	88
PID 2164 wrote to memory of 3412	2164	SeroXenLauncher.exe	88
PID 2164 wrote to memory of 4916	2164	SeroXenLauncher.exe	89
PID 2164 wrote to memory of 4916	2164	SeroXenLauncher.exe	89
PID 2164 wrote to memory of 4916	2164	SeroXenLauncher.exe	89
PID 3412 wrote to memory of 2360	3412	Client.exe	91
PID 3412 wrote to memory of 2360	3412	Client.exe	91
PID 3412 wrote to memory of 2360	3412	Client.exe	91

C:\Users\Admin\AppData\Local\Temp\SeroXenLauncher.exe
"C:\Users\Admin\AppData\Local\Temp\SeroXenLauncher.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\SeroXenLauncher.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:640
- C:\Windows\SysWOW64\SubDir\Client.exe
  "C:\Windows\SysWOW64\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3412
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2360
- C:\Windows\SysWOW64\SCHTASKS.exe
  "SCHTASKS.exe" /create /tn "$77SeroXenLauncher.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\SeroXenLauncher.exe'" /sc onlogon /rl HIGHEST
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4916

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\SubDir\Client.exe

Filesize
409KB

MD5
54d920888e6066870191f44fe0b27206

SHA1
87feb8a460dd1dc736fc96fbfbe37bf67aed2c3e

SHA256
5416eb9ce7028292f5810ab8acec85ab7cd55503bcdf097f3e2ce2a900577797

SHA512
4b23903103954c5d491eedc1c77fec1fea32552b9b863ada312b75388a9a56d38573851d2f6edaf61444fb0549196b1e9310cb6fa4e1773b9bf65291d5e2f72d

Download Submit
memory/2164-6-0x0000000005350000-0x0000000005362000-memory.dmp

Filesize
72KB

Download
memory/2164-1-0x0000000000460000-0x00000000004CC000-memory.dmp

Filesize
432KB

Download
memory/2164-3-0x0000000004EB0000-0x0000000004F42000-memory.dmp

Filesize
584KB

Download
memory/2164-4-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/2164-5-0x0000000004E10000-0x0000000004E76000-memory.dmp

Filesize
408KB

Download
memory/2164-0-0x00000000749CE000-0x00000000749CF000-memory.dmp

Filesize
4KB

Download
memory/2164-7-0x0000000006150000-0x000000000618C000-memory.dmp

Filesize
240KB

Download
memory/2164-2-0x00000000053C0000-0x0000000005964000-memory.dmp

Filesize
5.6MB

Download
memory/2164-15-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/3412-13-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/3412-12-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/3412-17-0x0000000006DD0000-0x0000000006DDA000-memory.dmp

Filesize
40KB

Download
memory/3412-18-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/3412-19-0x00000000749C0000-0x0000000075170000-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