quasar | d3562816beddc0f436d4c959ea831d640b88b701a26c349cb31a3df0b0589b3d

Analysis

max time kernel
147s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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 3 IoCs

resource	yara_rule
behavioral1/memory/2512-1-0x00000000009B0000-0x0000000000CD4000-memory.dmp	family_quasar
behavioral1/files/0x000f000000018662-6.dat	family_quasar
behavioral1/memory/1616-8-0x0000000000BD0000-0x0000000000EF4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1616	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
2348	schtasks.exe
3060	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2512	Client-built.exe
Token: SeDebugPrivilege	1616	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1616	svchost.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 2348	2512	Client-built.exe	30
PID 2512 wrote to memory of 2348	2512	Client-built.exe	30
PID 2512 wrote to memory of 2348	2512	Client-built.exe	30
PID 2512 wrote to memory of 1616	2512	Client-built.exe	32
PID 2512 wrote to memory of 1616	2512	Client-built.exe	32
PID 2512 wrote to memory of 1616	2512	Client-built.exe	32
PID 1616 wrote to memory of 3060	1616	svchost.exe	33
PID 1616 wrote to memory of 3060	1616	svchost.exe	33
PID 1616 wrote to memory of 3060	1616	svchost.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:2512
- 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:2348
- 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:1616
- - 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:3060

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/1616-8-0x0000000000BD0000-0x0000000000EF4000-memory.dmp

Filesize
3.1MB

Download
memory/1616-11-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

Filesize
9.9MB

Download
memory/1616-9-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

Filesize
9.9MB

Download
memory/1616-12-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

Filesize
9.9MB

Download
memory/2512-0-0x000007FEF5393000-0x000007FEF5394000-memory.dmp

Filesize
4KB

Download
memory/2512-1-0x00000000009B0000-0x0000000000CD4000-memory.dmp

Filesize
3.1MB

Download
memory/2512-2-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

Filesize
9.9MB

Download
memory/2512-10-0x000007FEF5390000-0x000007FEF5D7C000-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