quasar | d3562816beddc0f436d4c959ea831d640b88b701a26c349cb31a3df0b0589b3d

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-01-2025 01:46

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General

Target

Client-built.exe
Size

3.1MB
MD5

28fa38429cebfbb42d0283c13ecc8efa
SHA1

8fcae55369b62bbebd8dba8558e290e1a3b0d9f7
SHA256

d3562816beddc0f436d4c959ea831d640b88b701a26c349cb31a3df0b0589b3d
SHA512

7aa14716d0e8005749966337cacea11a490d138f80329a64b7684e9b875d5a0d935a1ff3aa8336a7d43d836e5e8c69f0c983eb3bda4d58aa3c64a456ee5288e3
SSDEEP

49152:evaY52fyaSZOrPWluWBuGG5g5hL5xNESEfk/iYLoGdYzdTHHB72eh2NT:evv52fyaSZOrPWluWBDG5g5hNx62

Score

10^/10

quasar offset spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Offset

127.0.0.1:4782

Mutex

6210ab1d-dd45-4f17-a324-f24c1474c4d8

Attributes

encryption_key
CABE6FE0988CAB22AE614AA6065A89402DF1C513
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
conhost
subdirectory
Windows

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/4992-1-0x0000000000B20000-0x0000000000E44000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023bf9-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1812	svchost.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
3988	schtasks.exe
3984	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4992	Client-built.exe
Token: SeDebugPrivilege	1812	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1812	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4992 wrote to memory of 3984	4992	Client-built.exe	82
PID 4992 wrote to memory of 3984	4992	Client-built.exe	82
PID 4992 wrote to memory of 1812	4992	Client-built.exe	84
PID 4992 wrote to memory of 1812	4992	Client-built.exe	84
PID 1812 wrote to memory of 3988	1812	svchost.exe	86
PID 1812 wrote to memory of 3988	1812	svchost.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:4992
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "conhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3984
- C:\Users\Admin\AppData\Roaming\Windows\svchost.exe
  "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1812
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "conhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3988

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\Windows\svchost.exe

Filesize
3.1MB

MD5
28fa38429cebfbb42d0283c13ecc8efa

SHA1
8fcae55369b62bbebd8dba8558e290e1a3b0d9f7

SHA256
d3562816beddc0f436d4c959ea831d640b88b701a26c349cb31a3df0b0589b3d

SHA512
7aa14716d0e8005749966337cacea11a490d138f80329a64b7684e9b875d5a0d935a1ff3aa8336a7d43d836e5e8c69f0c983eb3bda4d58aa3c64a456ee5288e3

Download Submit
memory/1812-9-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/1812-11-0x000000001BF60000-0x000000001BFB0000-memory.dmp

Filesize
320KB

Download
memory/1812-12-0x000000001D710000-0x000000001D7C2000-memory.dmp

Filesize
712KB

Download
memory/1812-13-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/4992-0-0x00007FFFCD2F3000-0x00007FFFCD2F5000-memory.dmp

Filesize
8KB

Download
memory/4992-1-0x0000000000B20000-0x0000000000E44000-memory.dmp

Filesize
3.1MB

Download
memory/4992-2-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/4992-10-0x00007FFFCD2F0000-0x00007FFFCDDB1000-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