quasar | f662ec11f175b9a5c5a14819cc1e3339d111ed15a4ea5d56ef445c14ab3f5635

Analysis

max time kernel
17s
max time network
18s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
31-12-2024 10:46

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General

Target

Client-built.exe
Size

3.1MB
MD5

9f21520eef3c9de8b7e3ef6d031c97d3
SHA1

06cfbdb076b384aa27e3a663012a032e116ea30c
SHA256

f662ec11f175b9a5c5a14819cc1e3339d111ed15a4ea5d56ef445c14ab3f5635
SHA512

949105580c335071c9ac5b2c8296825969fba995a605c29f5f95a132e07214d7dfc2f0f683d513a0347518001c46dcaec5a616a731c7e4c65383f45444d3e2fb
SSDEEP

49152:Wvkt62XlaSFNWPjljiFa2RoUYI43xNESErk/i2LoGdXFTHHB72eh2NT:Wv462XlaSFNWPjljiFXRoUYIMxW4

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.86.70:4782

Mutex

c1c98204-fc6e-4e09-8c36-98234ec63629

Attributes

encryption_key
4094E5945398B89DBE9DB455B39CBB4AF82FE324
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Rooblox
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
behavioral1/memory/5076-1-0x0000000000BC0000-0x0000000000EE4000-memory.dmp	family_quasar
behavioral1/files/0x001a00000002ab3d-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1416	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
4540	schtasks.exe
4536	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5076	Client-built.exe
Token: SeDebugPrivilege	1416	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1416	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5076 wrote to memory of 4540	5076	Client-built.exe	77
PID 5076 wrote to memory of 4540	5076	Client-built.exe	77
PID 5076 wrote to memory of 1416	5076	Client-built.exe	79
PID 5076 wrote to memory of 1416	5076	Client-built.exe	79
PID 1416 wrote to memory of 4536	1416	Client.exe	80
PID 1416 wrote to memory of 4536	1416	Client.exe	80

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:5076
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Rooblox" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4540
- 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:1416
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Rooblox" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4536

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
9f21520eef3c9de8b7e3ef6d031c97d3

SHA1
06cfbdb076b384aa27e3a663012a032e116ea30c

SHA256
f662ec11f175b9a5c5a14819cc1e3339d111ed15a4ea5d56ef445c14ab3f5635

SHA512
949105580c335071c9ac5b2c8296825969fba995a605c29f5f95a132e07214d7dfc2f0f683d513a0347518001c46dcaec5a616a731c7e4c65383f45444d3e2fb

Download Submit
memory/1416-10-0x00007FFAFF0E0000-0x00007FFAFFBA2000-memory.dmp

Filesize
10.8MB

Download
memory/1416-11-0x00007FFAFF0E0000-0x00007FFAFFBA2000-memory.dmp

Filesize
10.8MB

Download
memory/1416-12-0x000000001BB60000-0x000000001BBB0000-memory.dmp

Filesize
320KB

Download
memory/1416-13-0x000000001C800000-0x000000001C8B2000-memory.dmp

Filesize
712KB

Download
memory/1416-14-0x00007FFAFF0E0000-0x00007FFAFFBA2000-memory.dmp

Filesize
10.8MB

Download
memory/5076-0-0x00007FFAFF0E3000-0x00007FFAFF0E5000-memory.dmp

Filesize
8KB

Download
memory/5076-1-0x0000000000BC0000-0x0000000000EE4000-memory.dmp

Filesize
3.1MB

Download
memory/5076-2-0x00007FFAFF0E0000-0x00007FFAFFBA2000-memory.dmp

Filesize
10.8MB

Download
memory/5076-9-0x00007FFAFF0E0000-0x00007FFAFFBA2000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads