quasar | e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1

Analysis

max time kernel
149s
max time network
146s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/09/2026, 11:00

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General

Target
e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Size 889KB
Sample260910-m4gyfavyhs
SHA256 e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1
MD5 db538d6ecacdc1a7b456cce213e29c73
SHA1 8b60de3898a191e2cb1e753033451dca6c0bb16c
SHA512 e686cfecab9e2f309e51e15205802b3b98879de4ed48db7400362f5662305e8ceeae3ad40939f6334900e7b92210f3c7c5bde0c28be33f293ad39aa819bebabe
SSDEEP 24576:h0+yKPHzzKCf5NcsmYhMZ8VEt2H7BNRpUoE:hqKPHfKCf5C5iMZ8at4c
TLSH
T1231501C463C04F30CD6A9D3451345D644377AF4A3F95F204AE28BD633BB7ACA2956A8B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

zoy2 discovery execution quasar persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

ZOY2

cns.grotominpgroup.pl:61541
sns.grotominpgroup.pl:61542

Mutex

QSR_MUTEX_xiYVk0XJBB1ZLuxU0z

Attributes

encryption_key
SK0VDG4gy6RvLDfhKLgU
install_name
plientmcf.exe
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
log_directory
Logs
reconnect_delay
3000
startup_key
startupmcf.exe
subdirectory
CdApp

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/4272-7-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1392	plientmcf.exe

Looks up external IP address via web service 1 TTPs 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

discovery

Internet Connection Discovery

T1016.001

flow	ioc
1	ip-api.com

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2084 set thread context of 4272	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	89
PID 2084 set thread context of 908	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 5824 set thread context of 5252	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	97
PID 5824 set thread context of 4360	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	98

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2172	4360	WerFault.exe	98

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	plientmcf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
8	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Token: SeDebugPrivilege	4272	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Token: SeDebugPrivilege	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 4272	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	89
PID 2084 wrote to memory of 4272	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	89
PID 2084 wrote to memory of 4272	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	89
PID 2084 wrote to memory of 4272	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	89
PID 2084 wrote to memory of 4272	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	89
PID 2084 wrote to memory of 908	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 2084 wrote to memory of 908	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 2084 wrote to memory of 908	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 2084 wrote to memory of 908	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 2084 wrote to memory of 908	2084	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 4272 wrote to memory of 8	4272	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	92
PID 4272 wrote to memory of 1392	4272	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	94
PID 5824 wrote to memory of 5252	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	97
PID 5824 wrote to memory of 5252	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	97
PID 5824 wrote to memory of 5252	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	97
PID 5824 wrote to memory of 5252	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	97
PID 5824 wrote to memory of 5252	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	97
PID 5824 wrote to memory of 4360	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	98
PID 5824 wrote to memory of 4360	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	98
PID 5824 wrote to memory of 4360	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	98
PID 5824 wrote to memory of 4360	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	98
PID 5824 wrote to memory of 4360	5824	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	98

C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
"C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4272
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "startupmcf.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:8
- - C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
    "C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1392
- C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:908

C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5824
- C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5252
- C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  2⤵
  PID:4360
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4360 -s 92
    3⤵
    - Program crash
    PID:2172

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 392 -p 4360 -ip 4360
1⤵
PID:2884

Network

MITRE ATT&CK Enterprise v16

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

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

plientmcf.exe

Path C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
Size 889KB
SHA256 e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1
MD5 db538d6ecacdc1a7b456cce213e29c73
SHA1 8b60de3898a191e2cb1e753033451dca6c0bb16c
SHA512 e686cfecab9e2f309e51e15205802b3b98879de4ed48db7400362f5662305e8ceeae3ad40939f6334900e7b92210f3c7c5bde0c28be33f293ad39aa819bebabe
SSDEEP 24576:h0+yKPHzzKCf5NcsmYhMZ8VEt2H7BNRpUoE:hqKPHfKCf5C5iMZ8at4c
TLSH
T1231501C463C04F30CD6A9D3451345D644377AF4A3F95F204AE28BD633BB7ACA2956A8B
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/908-16-0x0000000005180000-0x00000000051E6000-memory.dmp

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memory/908-12-0x0000000074210000-0x00000000749CC000-memory.dmp

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memory/908-18-0x0000000074210000-0x00000000749CC000-memory.dmp

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memory/908-13-0x0000000074210000-0x00000000749CC000-memory.dmp

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memory/2084-2-0x0000000007AC0000-0x0000000007BBC000-memory.dmp

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memory/2084-4-0x0000000074210000-0x00000000749CC000-memory.dmp

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memory/2084-1-0x00000000009C0000-0x0000000000AA4000-memory.dmp

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memory/2084-3-0x0000000005910000-0x00000000059AC000-memory.dmp

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memory/2084-5-0x0000000074222000-0x0000000074223000-memory.dmp

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memory/2084-0-0x0000000074222000-0x0000000074223000-memory.dmp

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memory/2084-15-0x0000000074210000-0x00000000749CC000-memory.dmp

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memory/2084-6-0x0000000074210000-0x00000000749CC000-memory.dmp

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memory/4272-10-0x0000000005100000-0x0000000005192000-memory.dmp

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memory/4272-14-0x0000000074210000-0x00000000749CC000-memory.dmp

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memory/4272-11-0x0000000074210000-0x00000000749CC000-memory.dmp

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memory/4272-17-0x0000000005650000-0x0000000005662000-memory.dmp

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memory/4272-9-0x00000000056C0000-0x0000000005C7A000-memory.dmp

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memory/4272-19-0x00000000065D0000-0x000000000660C000-memory.dmp

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memory/4272-7-0x0000000000400000-0x000000000045E000-memory.dmp

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memory/4272-21-0x0000000074210000-0x00000000749CC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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