quasar | 72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c

Analysis

max time kernel
144s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2025 04:06

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General

Target

72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
Size

951KB
MD5

b76d3e743d68ca1e3f04d641bfcc3ec7
SHA1

d2d4fea6920a1a737199ce0fcac7c44adb5d7bd8
SHA256

72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c
SHA512

c1e29917358740c56e9c83a0a5e8ea48d368806a0b71b2a240df9f5568cb7dc0d7b18e2959fe5b40d4ada2733594b6c17e705f6181c3a38eeaa1efd0ab24558b
SSDEEP

24576:JPzFQtxBAb2JewjA/s5TqKnNiw0RALH0+XxryrSwg2J:1FC+2jpnNiRSXxqgM

Score

10^/10

quasar stroy discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Stroy

109.248.151.166:61537

Mutex

QSR_MUTEX_uHD8seWaFzpqqYxRLX

Attributes

encryption_key
IR3AcRhjtuelpwNmTP7v
install_name
Updater.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Update
subdirectory
Windows

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/2496-7-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

pid	Process
3960	Updater.exe
4992	Updater.exe
1612	Updater.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
14	ip-api.com

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4036 set thread context of 2496	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	86
PID 4036 set thread context of 4912	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	87
PID 3960 set thread context of 4992	3960	Updater.exe	93
PID 3960 set thread context of 1612	3960	Updater.exe	94

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4656	4992	WerFault.exe	93

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Updater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Updater.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3508	schtasks.exe
2412	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
Token: SeDebugPrivilege	2496	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
Token: SeDebugPrivilege	3960	Updater.exe
Token: SeDebugPrivilege	1612	Updater.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 4036 wrote to memory of 2496	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	86
PID 4036 wrote to memory of 2496	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	86
PID 4036 wrote to memory of 2496	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	86
PID 4036 wrote to memory of 2496	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	86
PID 4036 wrote to memory of 2496	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	86
PID 4036 wrote to memory of 2496	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	86
PID 4036 wrote to memory of 2496	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	86
PID 4036 wrote to memory of 2496	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	86
PID 4036 wrote to memory of 4912	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	87
PID 4036 wrote to memory of 4912	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	87
PID 4036 wrote to memory of 4912	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	87
PID 4036 wrote to memory of 4912	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	87
PID 4036 wrote to memory of 4912	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	87
PID 4036 wrote to memory of 4912	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	87
PID 4036 wrote to memory of 4912	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	87
PID 4036 wrote to memory of 4912	4036	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	87
PID 2496 wrote to memory of 3508	2496	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	89
PID 2496 wrote to memory of 3508	2496	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	89
PID 2496 wrote to memory of 3508	2496	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	89
PID 2496 wrote to memory of 3960	2496	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	91
PID 2496 wrote to memory of 3960	2496	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	91
PID 2496 wrote to memory of 3960	2496	72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe	91
PID 3960 wrote to memory of 4992	3960	Updater.exe	93
PID 3960 wrote to memory of 4992	3960	Updater.exe	93
PID 3960 wrote to memory of 4992	3960	Updater.exe	93
PID 3960 wrote to memory of 4992	3960	Updater.exe	93
PID 3960 wrote to memory of 4992	3960	Updater.exe	93
PID 3960 wrote to memory of 4992	3960	Updater.exe	93
PID 3960 wrote to memory of 4992	3960	Updater.exe	93
PID 3960 wrote to memory of 4992	3960	Updater.exe	93
PID 3960 wrote to memory of 1612	3960	Updater.exe	94
PID 3960 wrote to memory of 1612	3960	Updater.exe	94
PID 3960 wrote to memory of 1612	3960	Updater.exe	94
PID 3960 wrote to memory of 1612	3960	Updater.exe	94
PID 3960 wrote to memory of 1612	3960	Updater.exe	94
PID 3960 wrote to memory of 1612	3960	Updater.exe	94
PID 3960 wrote to memory of 1612	3960	Updater.exe	94
PID 3960 wrote to memory of 1612	3960	Updater.exe	94
PID 1612 wrote to memory of 2412	1612	Updater.exe	98
PID 1612 wrote to memory of 2412	1612	Updater.exe	98
PID 1612 wrote to memory of 2412	1612	Updater.exe	98

C:\Users\Admin\AppData\Local\Temp\72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
"C:\Users\Admin\AppData\Local\Temp\72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4036
- C:\Users\Admin\AppData\Local\Temp\72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
  C:\Users\Admin\AppData\Local\Temp\72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2496
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3508
- - C:\Users\Admin\AppData\Roaming\Windows\Updater.exe
    "C:\Users\Admin\AppData\Roaming\Windows\Updater.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3960
  - - C:\Users\Admin\AppData\Roaming\Windows\Updater.exe
      C:\Users\Admin\AppData\Roaming\Windows\Updater.exe
      4⤵
      Executes dropped EXE
      PID:4992
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4992 -s 84
        5⤵
        Program crash
        
        PID:4656
  - - C:\Users\Admin\AppData\Roaming\Windows\Updater.exe
      C:\Users\Admin\AppData\Roaming\Windows\Updater.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1612
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Updater.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2412
- C:\Users\Admin\AppData\Local\Temp\72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
  C:\Users\Admin\AppData\Local\Temp\72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4992 -ip 4992
1⤵
PID:4740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c.exe.log

Filesize
706B

MD5
d95c58e609838928f0f49837cab7dfd2

SHA1
55e7139a1e3899195b92ed8771d1ca2c7d53c916

SHA256
0407c814aef0d62aec7fd39b7c2f614746f0d8ff41f8ef957736f520f14b0339

SHA512
405310b29a833604c6627063bfdcf055a197e01f633ef21da238f1a6415a02e21315d689b4a6669db23e82152bed6f3492afb60963e6b2a0e9bb2ac09a480b5d

Download Submit
C:\Users\Admin\AppData\Roaming\Windows\Updater.exe

Filesize
951KB

MD5
b76d3e743d68ca1e3f04d641bfcc3ec7

SHA1
d2d4fea6920a1a737199ce0fcac7c44adb5d7bd8

SHA256
72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c

SHA512
c1e29917358740c56e9c83a0a5e8ea48d368806a0b71b2a240df9f5568cb7dc0d7b18e2959fe5b40d4ada2733594b6c17e705f6181c3a38eeaa1efd0ab24558b

Download Submit
memory/1612-31-0x00000000064C0000-0x00000000064CA000-memory.dmp

Filesize
40KB

Download
memory/2496-14-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/2496-24-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/2496-19-0x0000000006280000-0x00000000062BC000-memory.dmp

Filesize
240KB

Download
memory/2496-17-0x0000000005550000-0x0000000005562000-memory.dmp

Filesize
72KB

Download
memory/2496-16-0x0000000005000000-0x0000000005066000-memory.dmp

Filesize
408KB

Download
memory/2496-7-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2496-11-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/4036-5-0x0000000007E20000-0x0000000007EB2000-memory.dmp

Filesize
584KB

Download
memory/4036-13-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/4036-6-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/4036-0-0x0000000074B5E000-0x0000000074B5F000-memory.dmp

Filesize
4KB

Download
memory/4036-4-0x00000000083D0000-0x0000000008974000-memory.dmp

Filesize
5.6MB

Download
memory/4036-3-0x0000000007D80000-0x0000000007E1C000-memory.dmp

Filesize
624KB

Download
memory/4036-2-0x0000000007BD0000-0x0000000007CE0000-memory.dmp

Filesize
1.1MB

Download
memory/4036-1-0x0000000000CB0000-0x0000000000DA4000-memory.dmp

Filesize
976KB

Download
memory/4912-12-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/4912-15-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/4912-18-0x0000000074B50000-0x0000000075300000-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