quasar | f0992e9e2ea5d5796c8c5c622f7da893d8151d14c46de8b1847a62d7afd08c6d

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-12-2024 05:02

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General

Target

Client-built.exe
Size

3.1MB
MD5

84f03f8b89bb599361ebf000c3fd13ce
SHA1

5507081e72e26ec9bc2d25dec2a14714f7b03318
SHA256

f0992e9e2ea5d5796c8c5c622f7da893d8151d14c46de8b1847a62d7afd08c6d
SHA512

09e5bc0b31a2980a3f1e51dc5964c67147aa16bc7124a5f06e237f79b5436810868f7326afbb35ab25ee1559c531ca15e10f8262aa1a061ac45737a42599f464
SSDEEP

49152:b+KL12toaDsbQPUl+DvccTzVPWj1GTiQjq3Q8Z4IoGtpTHHB72eh2NTd:b+Y12toaDsbQPUl+DvZzVPWjQS7Zl

Score

10^/10

quasar slave spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Slave

85.209.133.13:111

Mutex

ec2a0662-37ce-47bc-80e5-416bb4627d9b

Attributes

encryption_key
D55A711D57A556B5F8341D90111BDC78FB07B322
install_name
System.exe
log_directory
Logs
reconnect_delay
3000
startup_key
system
subdirectory
SubDir

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/2920-1-0x0000000000E50000-0x0000000001172000-memory.dmp	family_quasar
behavioral1/files/0x0008000000014b28-4.dat	family_quasar
behavioral1/memory/2752-8-0x0000000000E80000-0x00000000011A2000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2752	System.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
2588	schtasks.exe
2716	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2920	Client-built.exe
Token: SeDebugPrivilege	2752	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2752	System.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2920 wrote to memory of 2588	2920	Client-built.exe	28
PID 2920 wrote to memory of 2588	2920	Client-built.exe	28
PID 2920 wrote to memory of 2588	2920	Client-built.exe	28
PID 2920 wrote to memory of 2752	2920	Client-built.exe	30
PID 2920 wrote to memory of 2752	2920	Client-built.exe	30
PID 2920 wrote to memory of 2752	2920	Client-built.exe	30
PID 2752 wrote to memory of 2716	2752	System.exe	31
PID 2752 wrote to memory of 2716	2752	System.exe	31
PID 2752 wrote to memory of 2716	2752	System.exe	31

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:2920
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\System.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2588
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2752
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\System.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2716

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\SubDir\System.exe

Filesize
3.1MB

MD5
84f03f8b89bb599361ebf000c3fd13ce

SHA1
5507081e72e26ec9bc2d25dec2a14714f7b03318

SHA256
f0992e9e2ea5d5796c8c5c622f7da893d8151d14c46de8b1847a62d7afd08c6d

SHA512
09e5bc0b31a2980a3f1e51dc5964c67147aa16bc7124a5f06e237f79b5436810868f7326afbb35ab25ee1559c531ca15e10f8262aa1a061ac45737a42599f464

Download Submit
memory/2752-7-0x000007FEF6350000-0x000007FEF6D3C000-memory.dmp

Filesize
9.9MB

Download
memory/2752-8-0x0000000000E80000-0x00000000011A2000-memory.dmp

Filesize
3.1MB

Download
memory/2752-10-0x000007FEF6350000-0x000007FEF6D3C000-memory.dmp

Filesize
9.9MB

Download
memory/2752-11-0x000007FEF6350000-0x000007FEF6D3C000-memory.dmp

Filesize
9.9MB

Download
memory/2752-12-0x000007FEF6350000-0x000007FEF6D3C000-memory.dmp

Filesize
9.9MB

Download
memory/2920-0-0x000007FEF6353000-0x000007FEF6354000-memory.dmp

Filesize
4KB

Download
memory/2920-1-0x0000000000E50000-0x0000000001172000-memory.dmp

Filesize
3.1MB

Download
memory/2920-2-0x000007FEF6350000-0x000007FEF6D3C000-memory.dmp

Filesize
9.9MB

Download
memory/2920-9-0x000007FEF6350000-0x000007FEF6D3C000-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