quasar | b6bb8a533c77034b0d4eab34ffa434b1a999cac5f59983680d222f04e437729d

Analysis

max time kernel
126s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2025, 03:31

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General

Target

0x0008000000016031-17.exe
Size

3.1MB
MD5

7776335b8b0d230370ca39602c484a69
SHA1

7705fb56ea438e609a6094bef10bdb2392f55719
SHA256

b6bb8a533c77034b0d4eab34ffa434b1a999cac5f59983680d222f04e437729d
SHA512

0e290749b442e317fe90591a43549a003d7f95c086d220b04eae018209a9785a1754b834d529a5839b15d2aa783edd17e52f4ab2b331e3a14c47d84ebf24899d
SSDEEP

49152:2vAt62XlaSFNWPjljiFa2RoUYI4MxNESEWk/imLoGdcTHHB72eh2NT:2vs62XlaSFNWPjljiFXRoUYI3xVo

Score

10^/10

quasar svchost 3 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost 3

41.216.183.179:3742

Mutex

11b8b70b-ab15-4aab-8132-3e7b18b2b48b

Attributes

encryption_key
0325CE0E85B5B8870BB69FE8C81088DBCBFAC6F7
install_name
startui.exe
log_directory
Logs
reconnect_delay
3000
startup_key
startui
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/2164-1-0x0000000000080000-0x00000000003A4000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b63-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2548	startui.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\SubDir	0x0008000000016031-17.exe
File opened for modification	C:\Program Files\SubDir\startui.exe	startui.exe
File opened for modification	C:\Program Files\SubDir	startui.exe
File created	C:\Program Files\SubDir\startui.exe	0x0008000000016031-17.exe
File opened for modification	C:\Program Files\SubDir\startui.exe	0x0008000000016031-17.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
1996	schtasks.exe
3608	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2164	0x0008000000016031-17.exe
Token: SeDebugPrivilege	2548	startui.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2548	startui.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2164 wrote to memory of 1996	2164	0x0008000000016031-17.exe	86
PID 2164 wrote to memory of 1996	2164	0x0008000000016031-17.exe	86
PID 2164 wrote to memory of 2548	2164	0x0008000000016031-17.exe	88
PID 2164 wrote to memory of 2548	2164	0x0008000000016031-17.exe	88
PID 2548 wrote to memory of 3608	2548	startui.exe	89
PID 2548 wrote to memory of 3608	2548	startui.exe	89

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\0x0008000000016031-17.exe
"C:\Users\Admin\AppData\Local\Temp\0x0008000000016031-17.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "startui" /sc ONLOGON /tr "C:\Program Files\SubDir\startui.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1996
- C:\Program Files\SubDir\startui.exe
  "C:\Program Files\SubDir\startui.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2548
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "startui" /sc ONLOGON /tr "C:\Program Files\SubDir\startui.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3608

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:\Program Files\SubDir\startui.exe

Filesize
3.1MB

MD5
7776335b8b0d230370ca39602c484a69

SHA1
7705fb56ea438e609a6094bef10bdb2392f55719

SHA256
b6bb8a533c77034b0d4eab34ffa434b1a999cac5f59983680d222f04e437729d

SHA512
0e290749b442e317fe90591a43549a003d7f95c086d220b04eae018209a9785a1754b834d529a5839b15d2aa783edd17e52f4ab2b331e3a14c47d84ebf24899d

Download Submit
memory/2164-0-0x00007FFE9E233000-0x00007FFE9E235000-memory.dmp

Filesize
8KB

Download
memory/2164-1-0x0000000000080000-0x00000000003A4000-memory.dmp

Filesize
3.1MB

Download
memory/2164-2-0x00007FFE9E230000-0x00007FFE9ECF1000-memory.dmp

Filesize
10.8MB

Download
memory/2164-9-0x00007FFE9E230000-0x00007FFE9ECF1000-memory.dmp

Filesize
10.8MB

Download
memory/2548-10-0x00007FFE9E230000-0x00007FFE9ECF1000-memory.dmp

Filesize
10.8MB

Download
memory/2548-11-0x00007FFE9E230000-0x00007FFE9ECF1000-memory.dmp

Filesize
10.8MB

Download
memory/2548-12-0x000000001BCD0000-0x000000001BD20000-memory.dmp

Filesize
320KB

Download
memory/2548-13-0x000000001C620000-0x000000001C6D2000-memory.dmp

Filesize
712KB

Download
memory/2548-14-0x00007FFE9E230000-0x00007FFE9ECF1000-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