quasar | e5556b22dcd6d7d26ce0e58e050632a0a03bf9fa2515953aaca8473e5f959f1d

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
01-06-2023 15:03

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General

Target

08429299.exe
Size

3.1MB
MD5

4bfcf945a94b7497d44dec0e663e2903
SHA1

1456b93f6ef6225a635955662641524e95e4f5ce
SHA256

e5556b22dcd6d7d26ce0e58e050632a0a03bf9fa2515953aaca8473e5f959f1d
SHA512

2ff0b5dab62e771429e44a3b1245d6839487b13a560075f054c5795cc1c89cd0f3a2b4eb3a951c1483f88fc2dae33a5bac0f4b60d93c5c1acc50c177f4311a3c
SSDEEP

49152:EvblL26AaNeWgPhlmVqvMQ7XSKVDxNESE6k/iNLoGd+8THHB72eh2NT:EvBL26AaNeWgPhlmVqkQ7XSKVxFF

Score

10^/10

quasar telegram users spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Telegram Users

xegefi6666-30878.portmap.host:30878

Mutex

fa554b4d-a1d6-4917-9f68-8f040924e03d

Attributes

encryption_key
B736867CD516C8B6FB67365ADF945A5FC6943067
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Defender
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1696-54-0x0000000000060000-0x0000000000384000-memory.dmp	family_quasar

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

456 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

08429299.exe

description pid process

Token: SeDebugPrivilege 1696 08429299.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

08429299.exe

pid process

1696 08429299.exe

pid	process
456	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1696	08429299.exe

pid	process
1696	08429299.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

08429299.exe

description	pid	process	target process
PID 1696 wrote to memory of 456	1696	08429299.exe	schtasks.exe
PID 1696 wrote to memory of 456	1696	08429299.exe	schtasks.exe
PID 1696 wrote to memory of 456	1696	08429299.exe	schtasks.exe

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\08429299.exe
"C:\Users\Admin\AppData\Local\Temp\08429299.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1696

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:456

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1696-54-0x0000000000060000-0x0000000000384000-memory.dmp

Filesize
3.1MB

Download
memory/1696-55-0x000000001B690000-0x000000001B710000-memory.dmp

Filesize
512KB

Download
memory/1696-56-0x000000001B690000-0x000000001B710000-memory.dmp

Filesize
512KB

Download