quasar | 64698e9f6067743efd975ce0d47b63b78dfea095464eb0ebd3b6c70d6634decf

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08-01-2025 20:22

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General

Target

ClientX.exe
Size

3.4MB
MD5

d0203db3da462cf098ab8dd966c2d0a9
SHA1

d99936af6252051ca19f4e3c7d22d345304aa7db
SHA256

64698e9f6067743efd975ce0d47b63b78dfea095464eb0ebd3b6c70d6634decf
SHA512

ceb3aa0a2001579592b6ad5a8f441f001dae51eb9409182bc8daa10912d9ae0843c1cd15e80c757626ab9ed4bcdcf1ab92a958b1ea2fb43b32f2555ad27b1070
SSDEEP

49152:SvrI22SsaNYfdPBldt698dBcjHBDaEEmkak/8FroGdmTHHB72eh2NT:SvU22SsaNYfdPBldt6+dBcjHBDakl

Score

10^/10

quasar clientx spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

ClientX

o0p2e195m0-57292.portmap.host:57292

Mutex

aed26719-3e68-475e-a947-4e692516badc

Attributes

encryption_key
20F3A07EDAB2EA12EDA843B6ACF5435C19DB5D85
install_name
X.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ClientX
subdirectory
Client

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2400-1-0x0000000000E70000-0x00000000011D6000-memory.dmp	family_quasar
behavioral1/files/0x00080000000187a5-6.dat	family_quasar
behavioral1/memory/2528-9-0x0000000000270000-0x00000000005D6000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2528	X.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
3000	schtasks.exe
2144	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2400	ClientX.exe
Token: SeDebugPrivilege	2528	X.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2528	X.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2400 wrote to memory of 3000	2400	ClientX.exe	30
PID 2400 wrote to memory of 3000	2400	ClientX.exe	30
PID 2400 wrote to memory of 3000	2400	ClientX.exe	30
PID 2400 wrote to memory of 2528	2400	ClientX.exe	32
PID 2400 wrote to memory of 2528	2400	ClientX.exe	32
PID 2400 wrote to memory of 2528	2400	ClientX.exe	32
PID 2528 wrote to memory of 2144	2528	X.exe	33
PID 2528 wrote to memory of 2144	2528	X.exe	33
PID 2528 wrote to memory of 2144	2528	X.exe	33

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\ClientX.exe
"C:\Users\Admin\AppData\Local\Temp\ClientX.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2400
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "ClientX" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Client\X.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3000
- C:\Users\Admin\AppData\Roaming\Client\X.exe
  "C:\Users\Admin\AppData\Roaming\Client\X.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2528
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "ClientX" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Client\X.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2144

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

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3.4MB

MD5
d0203db3da462cf098ab8dd966c2d0a9

SHA1
d99936af6252051ca19f4e3c7d22d345304aa7db

SHA256
64698e9f6067743efd975ce0d47b63b78dfea095464eb0ebd3b6c70d6634decf

SHA512
ceb3aa0a2001579592b6ad5a8f441f001dae51eb9409182bc8daa10912d9ae0843c1cd15e80c757626ab9ed4bcdcf1ab92a958b1ea2fb43b32f2555ad27b1070

Download Submit
memory/2400-0-0x000007FEF5023000-0x000007FEF5024000-memory.dmp

Filesize
4KB

Download
memory/2400-1-0x0000000000E70000-0x00000000011D6000-memory.dmp

Filesize
3.4MB

Download
memory/2400-2-0x000007FEF5020000-0x000007FEF5A0C000-memory.dmp

Filesize
9.9MB

Download
memory/2400-8-0x000007FEF5020000-0x000007FEF5A0C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-9-0x0000000000270000-0x00000000005D6000-memory.dmp

Filesize
3.4MB

Download
memory/2528-10-0x000007FEF5020000-0x000007FEF5A0C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-11-0x000007FEF5020000-0x000007FEF5A0C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-12-0x000007FEF5020000-0x000007FEF5A0C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-13-0x000007FEF5020000-0x000007FEF5A0C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads