quasar | ccd7a66e3fcf6461917a355c88b073598686a1f7e987378c0a271ee322eadb68

Analysis

max time kernel
132s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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 2 IoCs

resource	yara_rule
behavioral2/memory/1176-1-0x0000000000F10000-0x0000000001234000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023c9b-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3540	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
4804	schtasks.exe
468	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1176	Client-built.exe
Token: SeDebugPrivilege	3540	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3540	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1176 wrote to memory of 4804	1176	Client-built.exe	82
PID 1176 wrote to memory of 4804	1176	Client-built.exe	82
PID 1176 wrote to memory of 3540	1176	Client-built.exe	84
PID 1176 wrote to memory of 3540	1176	Client-built.exe	84
PID 3540 wrote to memory of 468	3540	Client.exe	85
PID 3540 wrote to memory of 468	3540	Client.exe	85

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:1176
- 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:4804
- 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:3540
- - 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:468

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/1176-0-0x00007FFFAC463000-0x00007FFFAC465000-memory.dmp

Filesize
8KB

Download
memory/1176-1-0x0000000000F10000-0x0000000001234000-memory.dmp

Filesize
3.1MB

Download
memory/1176-2-0x00007FFFAC460000-0x00007FFFACF21000-memory.dmp

Filesize
10.8MB

Download
memory/1176-10-0x00007FFFAC460000-0x00007FFFACF21000-memory.dmp

Filesize
10.8MB

Download
memory/3540-9-0x00007FFFAC460000-0x00007FFFACF21000-memory.dmp

Filesize
10.8MB

Download
memory/3540-11-0x00007FFFAC460000-0x00007FFFACF21000-memory.dmp

Filesize
10.8MB

Download
memory/3540-12-0x000000001DC70000-0x000000001DCC0000-memory.dmp

Filesize
320KB

Download
memory/3540-13-0x000000001DD80000-0x000000001DE32000-memory.dmp

Filesize
712KB

Download
memory/3540-14-0x00007FFFAC460000-0x00007FFFACF21000-memory.dmp

Filesize
10.8MB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads