quasar | d72775e6603951c44c96ac31885bca2efb1358c86473a1f2e33c98a62a73a4ac

Analysis

max time kernel
147s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28-03-2024 19:12

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General

Target

Client-built.exe
Size

3.1MB
MD5

9a8853b2d14a1cc2779bca39bbec62b2
SHA1

93fed5da8104e34f9c42a5e59227829a86d3795d
SHA256

d72775e6603951c44c96ac31885bca2efb1358c86473a1f2e33c98a62a73a4ac
SHA512

c249f9d236bd5bae249cce6be833d5f4ea725efb1c6f79afc30e28657472ce4e6e6ce281c1c14d31974f05e7a0f3555e513886df63b5c326ade7e8239d8de43e
SSDEEP

49152:DvrI22SsaNYfdPBldt698dBcjHyjyPzoGroTHHB72eh2NT:DvU22SsaNYfdPBldt6+dBcjHyjyr

Score

10^/10

quasar slave spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Slave

xcoderreal-54839.portmap.host:54839

Mutex

276d9dc6-b19c-4958-8ac3-89586bd3b515

Attributes

encryption_key
ABCF70C37D1A79A01712038122D1532DF20DF72A
install_name
Client.exe
log_directory
Error Logs
reconnect_delay
3000
startup_key
WOS64
subdirectory
Windows

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1424-0-0x0000000000070000-0x0000000000394000-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/Job
T1053

Processes:

schtasks.exe

pid process

460 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Client-built.exe

description pid process

Token: SeDebugPrivilege 1424 Client-built.exe

pid	process
460	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1424	Client-built.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Client-built.exe

description	pid	process	target process
PID 1424 wrote to memory of 460	1424	Client-built.exe	schtasks.exe
PID 1424 wrote to memory of 460	1424	Client-built.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1424

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "WOS64" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:460

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/1424-0-0x0000000000070000-0x0000000000394000-memory.dmp

Filesize
3.1MB

Download
memory/1424-2-0x000000001B060000-0x000000001B070000-memory.dmp

Filesize
64KB

Download
memory/1424-1-0x00007FF838CA0000-0x00007FF839761000-memory.dmp

Filesize
10.8MB

Download
memory/1424-4-0x00007FF838CA0000-0x00007FF839761000-memory.dmp

Filesize
10.8MB

Download
memory/1424-5-0x000000001B060000-0x000000001B070000-memory.dmp

Filesize
64KB

Download