quasar | e4a7526ba0307eafbdf3d9ce7c5fb335fb76989a480f05de0f928d47808d5595

Analysis

max time kernel
133s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-11-2024 14:46

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Client-built.exe
Size

3.1MB
MD5

5c90e91232e7e16804a5e2512f56ef0f
SHA1

0f5533f772a53f8a96710a1812d05c5db276d999
SHA256

e4a7526ba0307eafbdf3d9ce7c5fb335fb76989a480f05de0f928d47808d5595
SHA512

a96fe2661c18d59a6f84bfeae75eeae0db847b559808cd1f2a2485d3c651cea547a18af1435a5c3f855f31cec7b114ced112ad27b0f7f99abc751a090ff1ebc0
SSDEEP

49152:Svkt62XlaSFNWPjljiFa2RoUYIk7waT5p+Vk/3LoGdjTHHB72eh2NT:Sv462XlaSFNWPjljiFXRoUYIzaD

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.0.2.15:4782

Mutex

d850957b-64bd-497d-9f9a-3ee4894ffc1e

Attributes

encryption_key
8F0072332E1ACC25777BCA859650B335CCE8B039
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Discord
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4980-1-0x0000000000F50000-0x0000000001274000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

2056 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

Processes:

schtasks.exeschtasks.exe

pid process

1180 schtasks.exe
2160 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exeClient.exe

description pid process

Token: SeDebugPrivilege 4980 Client-built.exe
Token: SeDebugPrivilege 2056 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

2056 Client.exe

pid	process
2056	Client.exe

pid	process
1180	schtasks.exe
2160	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	4980	Client-built.exe
Token: SeDebugPrivilege	2056	Client.exe

pid	process
2056	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Client-built.exeClient.exe

description	pid	process	target process
PID 4980 wrote to memory of 1180	4980	Client-built.exe	schtasks.exe
PID 4980 wrote to memory of 1180	4980	Client-built.exe	schtasks.exe
PID 4980 wrote to memory of 2056	4980	Client-built.exe	Client.exe
PID 4980 wrote to memory of 2056	4980	Client-built.exe	Client.exe
PID 2056 wrote to memory of 2160	2056	Client.exe	schtasks.exe
PID 2056 wrote to memory of 2160	2056	Client.exe	schtasks.exe

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:4980
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1180
- 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:2056
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2160

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
5c90e91232e7e16804a5e2512f56ef0f

SHA1
0f5533f772a53f8a96710a1812d05c5db276d999

SHA256
e4a7526ba0307eafbdf3d9ce7c5fb335fb76989a480f05de0f928d47808d5595

SHA512
a96fe2661c18d59a6f84bfeae75eeae0db847b559808cd1f2a2485d3c651cea547a18af1435a5c3f855f31cec7b114ced112ad27b0f7f99abc751a090ff1ebc0

Download Submit
memory/2056-10-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/2056-11-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/2056-12-0x000000001B400000-0x000000001B450000-memory.dmp

Filesize
320KB

Download
memory/2056-13-0x000000001C0F0000-0x000000001C1A2000-memory.dmp

Filesize
712KB

Download
memory/2056-14-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4980-0-0x00007FFA102C3000-0x00007FFA102C5000-memory.dmp

Filesize
8KB

Download
memory/4980-1-0x0000000000F50000-0x0000000001274000-memory.dmp

Filesize
3.1MB

Download
memory/4980-2-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4980-9-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download