quasar | 16146c8f8509d561fd958e0e449806e201c9b162038b39544d8ceefa4a17d460

Analysis

max time kernel
118s
max time network
127s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
07-02-2025 21:42

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General

Target

svchost.exe
Size

3.1MB
MD5

e37749aa169a0e99033fcbb2a115690b
SHA1

ec10e98852491d8312c7d575755b4ddb63799170
SHA256

16146c8f8509d561fd958e0e449806e201c9b162038b39544d8ceefa4a17d460
SHA512

f7301d801a8559bf75365d19ee83112ebedbbd6c17e45e4ef6c67a5b5636945bb4d28b6c3340549dc8a113c7aadb82ac809dc27c07eb72f864871986bef240ec
SSDEEP

49152:fv+lL26AaNeWgPhlmVqvMQ7XSK2lRJ6cbR3LoGdoTHHB72eh2NT:fvuL26AaNeWgPhlmVqkQ7XSK2lRJ6m

Score

10^/10

quasar svchost spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost

192.168.150.128:443

Mutex

8c51cc91-2010-4f25-b0cb-831824902ce5

Attributes

encryption_key
AD57652772C12EC255BB6DF4385E6327DCCF50D6
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Realtek HD Audio Universal Service
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral1/memory/2832-1-0x0000000000FA0000-0x00000000012C4000-memory.dmp	family_quasar

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system32\SubDir\svchost.exe	svchost.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
2788	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2832	svchost.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2832 wrote to memory of 2788	2832	svchost.exe	30
PID 2832 wrote to memory of 2788	2832	svchost.exe	30
PID 2832 wrote to memory of 2788	2832	svchost.exe	30

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\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2832
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Realtek HD Audio Universal Service" /sc ONLOGON /tr "C:\Windows\system32\SubDir\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2788

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

memory/2832-0-0x000007FEF6503000-0x000007FEF6504000-memory.dmp

Filesize
4KB

Download
memory/2832-1-0x0000000000FA0000-0x00000000012C4000-memory.dmp

Filesize
3.1MB

Download
memory/2832-2-0x000007FEF6500000-0x000007FEF6EEC000-memory.dmp

Filesize
9.9MB

Download
memory/2832-4-0x000007FEF6503000-0x000007FEF6504000-memory.dmp

Filesize
4KB

Download
memory/2832-5-0x000007FEF6500000-0x000007FEF6EEC000-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