quasar | 55d23f7ddba20f057e61b777b3224255b9edf3f126eb30bb24a22cdfe55f8682

Analysis

max time kernel
78s
max time network
74s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-11-2024 12:17

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General

Target

KMod Mod Menu.exe
Size

3.1MB
MD5

cb709d5219f90d690c5d344583951b8e
SHA1

ef7cf1c88408a140a1224f3fa6dbcde8c6ed63cd
SHA256

55d23f7ddba20f057e61b777b3224255b9edf3f126eb30bb24a22cdfe55f8682
SHA512

edcff976d067281898bf6ca8b64c971c456fa92afa4e38e22af9cf9f0ec0701e4e114d196c200a4412c9600326a1cafe7edd394a5575c17e744aa167a1cb1139
SSDEEP

49152:3vyI22SsaNYfdPBldt698dBcjHoCt1JBLoGdVeTHHB72eh2NT:3vf22SsaNYfdPBldt6+dBcjHoCb

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.126:4782

Mutex

9be81df8-796e-4238-9ce9-95e1df50d0cc

Attributes

encryption_key
911A94FD4CE2636A220E82F01C7CC3383A2C3D0C
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/8-1-0x0000000000850000-0x0000000000B74000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

4136 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

720 schtasks.exe
4644 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

KMod Mod Menu.exeClient.exe

description pid process

Token: SeDebugPrivilege 8 KMod Mod Menu.exe
Token: SeDebugPrivilege 4136 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

4136 Client.exe

pid	process
4136	Client.exe

pid	process
720	schtasks.exe
4644	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	8	KMod Mod Menu.exe
Token: SeDebugPrivilege	4136	Client.exe

pid	process
4136	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

KMod Mod Menu.exeClient.exe

description	pid	process	target process
PID 8 wrote to memory of 720	8	KMod Mod Menu.exe	schtasks.exe
PID 8 wrote to memory of 720	8	KMod Mod Menu.exe	schtasks.exe
PID 8 wrote to memory of 4136	8	KMod Mod Menu.exe	Client.exe
PID 8 wrote to memory of 4136	8	KMod Mod Menu.exe	Client.exe
PID 4136 wrote to memory of 4644	4136	Client.exe	schtasks.exe
PID 4136 wrote to memory of 4644	4136	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\KMod Mod Menu.exe
"C:\Users\Admin\AppData\Local\Temp\KMod Mod Menu.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:8
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:720
- 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:4136
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4644

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
cb709d5219f90d690c5d344583951b8e

SHA1
ef7cf1c88408a140a1224f3fa6dbcde8c6ed63cd

SHA256
55d23f7ddba20f057e61b777b3224255b9edf3f126eb30bb24a22cdfe55f8682

SHA512
edcff976d067281898bf6ca8b64c971c456fa92afa4e38e22af9cf9f0ec0701e4e114d196c200a4412c9600326a1cafe7edd394a5575c17e744aa167a1cb1139

Download Submit
memory/8-0-0x00007FF9F5A73000-0x00007FF9F5A75000-memory.dmp

Filesize
8KB

Download
memory/8-1-0x0000000000850000-0x0000000000B74000-memory.dmp

Filesize
3.1MB

Download
memory/8-2-0x00007FF9F5A70000-0x00007FF9F6531000-memory.dmp

Filesize
10.8MB

Download
memory/8-10-0x00007FF9F5A70000-0x00007FF9F6531000-memory.dmp

Filesize
10.8MB

Download
memory/4136-9-0x00007FF9F5A70000-0x00007FF9F6531000-memory.dmp

Filesize
10.8MB

Download
memory/4136-11-0x00007FF9F5A70000-0x00007FF9F6531000-memory.dmp

Filesize
10.8MB

Download
memory/4136-12-0x000000001B090000-0x000000001B0E0000-memory.dmp

Filesize
320KB

Download
memory/4136-13-0x000000001BAC0000-0x000000001BB72000-memory.dmp

Filesize
712KB

Download
memory/4136-14-0x00007FF9F5A70000-0x00007FF9F6531000-memory.dmp

Filesize
10.8MB

Download