quasar | e832cc0da0e1298acb1088ba43c06897b58f8b3f6bbc0be18ec7eac3313fc7ba

Analysis

max time kernel
887s
max time network
896s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06-01-2025 00:25

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General

Target

Client-built.exe
Size

3.1MB
MD5

88213eb46504fd2a6e3977e73bc0dd2b
SHA1

2765643bdb8f2968d116d5b400dfaecc9d7597f7
SHA256

e832cc0da0e1298acb1088ba43c06897b58f8b3f6bbc0be18ec7eac3313fc7ba
SHA512

572b8d5fac6847ef91583d808338c852ebc49be41c8fd9c46f356a0f45fdcfa9d57eec642a22b1dadb5f53278f06763f424d361a90012bf4d4ecbca2fa366674
SSDEEP

49152:ivFt62XlaSFNWPjljiFa2RoUYIJoRJ6vbR3LoGd5THHB72eh2NT:iv362XlaSFNWPjljiFXRoUYIJoRJ6B

Score

10^/10

quasar jjsploit spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

jjsploit

188.64.33.70:4782

Mutex

37345452-b4a7-4ed0-aaed-6b1e75131c4b

Attributes

encryption_key
DD3FB2AC53353CAF73D31F6A4C82182824F3697B
install_name
system.exe
log_directory
Logs
reconnect_delay
3000
startup_key
System Updater
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/3716-1-0x0000000000F50000-0x0000000001274000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c72-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2028	system.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
2340	schtasks.exe
4504	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3716	Client-built.exe
Token: SeDebugPrivilege	2028	system.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2028	system.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2028	system.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2028	system.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3716 wrote to memory of 4504	3716	Client-built.exe	83
PID 3716 wrote to memory of 4504	3716	Client-built.exe	83
PID 3716 wrote to memory of 2028	3716	Client-built.exe	85
PID 3716 wrote to memory of 2028	3716	Client-built.exe	85
PID 2028 wrote to memory of 2340	2028	system.exe	86
PID 2028 wrote to memory of 2340	2028	system.exe	86

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:3716
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "System Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\system.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4504
- C:\Users\Admin\AppData\Roaming\SubDir\system.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\system.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2028
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "System Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\system.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2340

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\system.exe

Filesize
3.1MB

MD5
88213eb46504fd2a6e3977e73bc0dd2b

SHA1
2765643bdb8f2968d116d5b400dfaecc9d7597f7

SHA256
e832cc0da0e1298acb1088ba43c06897b58f8b3f6bbc0be18ec7eac3313fc7ba

SHA512
572b8d5fac6847ef91583d808338c852ebc49be41c8fd9c46f356a0f45fdcfa9d57eec642a22b1dadb5f53278f06763f424d361a90012bf4d4ecbca2fa366674

Download Submit
memory/2028-8-0x00007FF8ABFF0000-0x00007FF8ACAB1000-memory.dmp

Filesize
10.8MB

Download
memory/2028-10-0x00007FF8ABFF0000-0x00007FF8ACAB1000-memory.dmp

Filesize
10.8MB

Download
memory/2028-11-0x000000001C450000-0x000000001C4A0000-memory.dmp

Filesize
320KB

Download
memory/2028-12-0x000000001C560000-0x000000001C612000-memory.dmp

Filesize
712KB

Download
memory/2028-13-0x00007FF8ABFF0000-0x00007FF8ACAB1000-memory.dmp

Filesize
10.8MB

Download
memory/3716-0-0x00007FF8ABFF3000-0x00007FF8ABFF5000-memory.dmp

Filesize
8KB

Download
memory/3716-1-0x0000000000F50000-0x0000000001274000-memory.dmp

Filesize
3.1MB

Download
memory/3716-2-0x00007FF8ABFF0000-0x00007FF8ACAB1000-memory.dmp

Filesize
10.8MB

Download
memory/3716-9-0x00007FF8ABFF0000-0x00007FF8ACAB1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads