quasar | e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1

Analysis

max time kernel
149s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-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 5 IoCs

Quasar is an open source Remote Access Tool.

trojan spyware quasar

description	flow	ioc	Process
Key opened		\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
	11	ip-api.com	Process not Found
	21	api.ipify.org	Process not Found
	49	ip-api.com	Process not Found
	55	api.ipify.org	Process not Found

Quasar payload 1 IoCs

resource	yara_rule
behavioral1/memory/3224-4-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Executes dropped EXE 6 IoCs

pid	Process
3484	plientmcf.exe
3424	plientmcf.exe
2600	plientmcf.exe
1692	plientmcf.exe
2796	plientmcf.exe
1508	plientmcf.exe

Looks up external IP address via web service 1 TTPs 4 IoCs

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

discovery

Internet Connection Discovery

T1016.001

flow	ioc
11	ip-api.com
21	api.ipify.org
49	ip-api.com
55	api.ipify.org

Suspicious use of SetThreadContext 8 IoCs

description	pid	Process	procid_target
PID 2608 set thread context of 3224	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 2608 set thread context of 584	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	91
PID 3484 set thread context of 3424	3484	plientmcf.exe	103
PID 3484 set thread context of 2600	3484	plientmcf.exe	104
PID 1956 set thread context of 2672	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	105
PID 1956 set thread context of 3988	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	106
PID 1692 set thread context of 2796	1692	plientmcf.exe	113
PID 1692 set thread context of 1508	1692	plientmcf.exe	114

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1656	1508	WerFault.exe	114

System Location Discovery: System Language Discovery 1 TTPs 13 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	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	plientmcf.exe
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	plientmcf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	plientmcf.exe
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

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
3080	schtasks.exe
3380	schtasks.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Token: SeDebugPrivilege	3224	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Token: SeDebugPrivilege	3484	plientmcf.exe
Token: SeDebugPrivilege	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
Token: SeDebugPrivilege	3424	plientmcf.exe
Token: SeDebugPrivilege	1692	plientmcf.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 2608 wrote to memory of 3224	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 2608 wrote to memory of 3224	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 2608 wrote to memory of 3224	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 2608 wrote to memory of 3224	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 2608 wrote to memory of 3224	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	90
PID 2608 wrote to memory of 584	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	91
PID 2608 wrote to memory of 584	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	91
PID 2608 wrote to memory of 584	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	91
PID 2608 wrote to memory of 584	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	91
PID 2608 wrote to memory of 584	2608	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	91
PID 3224 wrote to memory of 3080	3224	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	98
PID 3224 wrote to memory of 3484	3224	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	100
PID 3484 wrote to memory of 3424	3484	plientmcf.exe	103
PID 3484 wrote to memory of 3424	3484	plientmcf.exe	103
PID 3484 wrote to memory of 3424	3484	plientmcf.exe	103
PID 3484 wrote to memory of 3424	3484	plientmcf.exe	103
PID 3484 wrote to memory of 3424	3484	plientmcf.exe	103
PID 3484 wrote to memory of 2600	3484	plientmcf.exe	104
PID 3484 wrote to memory of 2600	3484	plientmcf.exe	104
PID 3484 wrote to memory of 2600	3484	plientmcf.exe	104
PID 3484 wrote to memory of 2600	3484	plientmcf.exe	104
PID 3484 wrote to memory of 2600	3484	plientmcf.exe	104
PID 1956 wrote to memory of 2672	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	105
PID 1956 wrote to memory of 2672	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	105
PID 1956 wrote to memory of 2672	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	105
PID 1956 wrote to memory of 2672	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	105
PID 1956 wrote to memory of 2672	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	105
PID 1956 wrote to memory of 3988	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	106
PID 1956 wrote to memory of 3988	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	106
PID 1956 wrote to memory of 3988	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	106
PID 1956 wrote to memory of 3988	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	106
PID 1956 wrote to memory of 3988	1956	e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe	106
PID 3424 wrote to memory of 3380	3424	plientmcf.exe	109
PID 1692 wrote to memory of 2796	1692	plientmcf.exe	113
PID 1692 wrote to memory of 2796	1692	plientmcf.exe	113
PID 1692 wrote to memory of 2796	1692	plientmcf.exe	113
PID 1692 wrote to memory of 2796	1692	plientmcf.exe	113
PID 1692 wrote to memory of 2796	1692	plientmcf.exe	113
PID 1692 wrote to memory of 1508	1692	plientmcf.exe	114
PID 1692 wrote to memory of 1508	1692	plientmcf.exe	114
PID 1692 wrote to memory of 1508	1692	plientmcf.exe	114
PID 1692 wrote to memory of 1508	1692	plientmcf.exe	114
PID 1692 wrote to memory of 1508	1692	plientmcf.exe	114

C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
"C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe"
1⤵
- Family: Quasar RAT
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2608
- 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:3224
- - 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:3080
- - C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
    "C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3484
  - - C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
      C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3424
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "startupmcf.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:3380
  - - C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
      C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2600
- C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:584

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:1956
- C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2672
- C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  C:\Users\Admin\AppData\Local\Temp\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3988

C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
  C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2796
- C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
  C:\Users\Admin\AppData\Roaming\CdApp\plientmcf.exe
  2⤵
  - Executes dropped EXE
  PID:1508
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1508 -s 80
    3⤵
    - Program crash
    PID:1656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1508 -ip 1508
1⤵
PID:1876

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

Replay Monitor

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Downloads

e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\e2f3b5f98efe155d198bebeffca6169a33a97f6011b3163b8c473331859848e1.exe.log
Size 522B
SHA256 5612afe347d8549cc95a0c710602bcc7d7b224361b613c0a6ba362092300c169
MD5 8334a471a4b492ece225b471b8ad2fc8
SHA1 1cb24640f32d23e8f7800bd0511b7b9c3011d992
SHA512 56ae2e83355c331b00d782797f5664c2f373eac240e811aab978732503ae05eb20b08730d2427ed90efa5a706d71b42b57153596a45a6b5592e3dd9128b81c36
TLSH
T108F097303722E1E489423F521C1C3A9943EF079AA360EE2C3959436ED825227AB212E3
MD5 SHA1 SHA512 TLSH

Submit Download

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/584-10-0x0000000005420000-0x0000000005430000-memory.dmp

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memory/584-11-0x00000000054D0000-0x0000000005536000-memory.dmp

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memory/2608-3-0x0000000004EA0000-0x0000000004F3C000-memory.dmp

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memory/2608-0-0x00000000002A0000-0x0000000000384000-memory.dmp

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memory/2608-2-0x0000000004DF0000-0x0000000004E00000-memory.dmp

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memory/2608-1-0x0000000007180000-0x000000000727C000-memory.dmp

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memory/3224-7-0x0000000005AE0000-0x0000000006084000-memory.dmp

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memory/3224-8-0x0000000005450000-0x00000000054E2000-memory.dmp

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memory/3224-9-0x0000000005440000-0x0000000005450000-memory.dmp

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memory/3224-4-0x0000000000400000-0x000000000045E000-memory.dmp

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memory/3224-13-0x0000000005A80000-0x0000000005A92000-memory.dmp

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memory/3424-32-0x00000000063F0000-0x00000000063FA000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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