quasar | ccd7a66e3fcf6461917a355c88b073598686a1f7e987378c0a271ee322eadb68

Analysis

max time kernel
133s
max time network
142s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-12-2024 01:51

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General

Target

Client-built.exe
Size

3.1MB
MD5

2b94149c3f189fcfeb12bb357a5ef826
SHA1

3ab132c97840bbd3295b9ebb5432d4996bda7c60
SHA256

ccd7a66e3fcf6461917a355c88b073598686a1f7e987378c0a271ee322eadb68
SHA512

1a713e26af54a3e8967002a6f8a5f9d27305ce9908106fd919ba2c6cd6709901d1555fe49fc42e41095aff7b4a4374ab12b2e1baa660751fce05ecd83bfd847d
SSDEEP

49152:uvCI22SsaNYfdPBldt698dBcjHY3a0h2arW6oGdESTHHB72eh2NT:uvP22SsaNYfdPBldt6+dBcjH81hf

Score

10^/10

quasar exe spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

exe

192.168.4.70:4782

Mutex

20b94a11-6f09-4a42-b723-e2b3fc07ea20

Attributes

encryption_key
85087DC59010C3D9E4749A15AB7F44397E834804
install_name
Client.exe
log_directory
Logs
reconnect_delay
1
startup_key
Quasar Client Startup
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/2072-1-0x0000000000220000-0x0000000000544000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016df8-6.dat	family_quasar
behavioral1/memory/2372-10-0x0000000000F30000-0x0000000001254000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2372	Client.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
348	schtasks.exe
2700	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2072	Client-built.exe
Token: SeDebugPrivilege	2372	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2372	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 348	2072	Client-built.exe	30
PID 2072 wrote to memory of 348	2072	Client-built.exe	30
PID 2072 wrote to memory of 348	2072	Client-built.exe	30
PID 2072 wrote to memory of 2372	2072	Client-built.exe	32
PID 2072 wrote to memory of 2372	2072	Client-built.exe	32
PID 2072 wrote to memory of 2372	2072	Client-built.exe	32
PID 2372 wrote to memory of 2700	2372	Client.exe	33
PID 2372 wrote to memory of 2700	2372	Client.exe	33
PID 2372 wrote to memory of 2700	2372	Client.exe	33

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:2072
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:348
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2372
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2700

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\Client.exe

Filesize
3.1MB

MD5
2b94149c3f189fcfeb12bb357a5ef826

SHA1
3ab132c97840bbd3295b9ebb5432d4996bda7c60

SHA256
ccd7a66e3fcf6461917a355c88b073598686a1f7e987378c0a271ee322eadb68

SHA512
1a713e26af54a3e8967002a6f8a5f9d27305ce9908106fd919ba2c6cd6709901d1555fe49fc42e41095aff7b4a4374ab12b2e1baa660751fce05ecd83bfd847d

Download Submit
memory/2072-0-0x000007FEF53E3000-0x000007FEF53E4000-memory.dmp

Filesize
4KB

Download
memory/2072-1-0x0000000000220000-0x0000000000544000-memory.dmp

Filesize
3.1MB

Download
memory/2072-2-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/2072-8-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/2372-9-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/2372-10-0x0000000000F30000-0x0000000001254000-memory.dmp

Filesize
3.1MB

Download
memory/2372-11-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/2372-12-0x000007FEF53E0000-0x000007FEF5DCC000-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