quasar | 0fe81f9a51cf0068408de3c3605ce2033a00bd7ec90cc9516c38f6069e06433b

Analysis

max time kernel
72s
max time network
99s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
04-11-2024 18:50

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

kreo q zi.exe
Size

3.1MB
MD5

28ac02fc40c8f1c2a8989ee3c09a1372
SHA1

b182758b62a1482142c0fce4be78c786e08b7025
SHA256

0fe81f9a51cf0068408de3c3605ce2033a00bd7ec90cc9516c38f6069e06433b
SHA512

2cbf2f6af46e5fae8e67144e1ac70bc748036c7adb7f7810d7d7d9f255ccf5d163cce07f11fb6526f9ab61c39f28bdf2356cc315b19a61cd2115612882eab767
SSDEEP

49152:7v+lL26AaNeWgPhlmVqvMQ7XSKsxRJ6wbR3LoGdGTHHB72eh2NT:7vuL26AaNeWgPhlmVqkQ7XSKsxRJ6K

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

hola435-24858.portmap.host:24858

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
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

resource	yara_rule
behavioral1/memory/3980-1-0x00000000003B0000-0x00000000006D4000-memory.dmp	family_quasar
behavioral1/files/0x00280000000451ad-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2868	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
2560	schtasks.exe
3544	schtasks.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe
2868	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3980	kreo q zi.exe
Token: SeDebugPrivilege	2868	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2868	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3980 wrote to memory of 2560	3980	kreo q zi.exe	85
PID 3980 wrote to memory of 2560	3980	kreo q zi.exe	85
PID 3980 wrote to memory of 2868	3980	kreo q zi.exe	87
PID 3980 wrote to memory of 2868	3980	kreo q zi.exe	87
PID 2868 wrote to memory of 3544	2868	Client.exe	88
PID 2868 wrote to memory of 3544	2868	Client.exe	88

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\kreo q zi.exe
"C:\Users\Admin\AppData\Local\Temp\kreo q zi.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3980
- 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:2560
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2868
- - 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:3544

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
28ac02fc40c8f1c2a8989ee3c09a1372

SHA1
b182758b62a1482142c0fce4be78c786e08b7025

SHA256
0fe81f9a51cf0068408de3c3605ce2033a00bd7ec90cc9516c38f6069e06433b

SHA512
2cbf2f6af46e5fae8e67144e1ac70bc748036c7adb7f7810d7d7d9f255ccf5d163cce07f11fb6526f9ab61c39f28bdf2356cc315b19a61cd2115612882eab767

Download Submit
memory/2868-6-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/2868-7-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/2868-8-0x0000000002B60000-0x0000000002BB0000-memory.dmp

Filesize
320KB

Download
memory/2868-9-0x000000001C860000-0x000000001C912000-memory.dmp

Filesize
712KB

Download
memory/2868-12-0x000000001B720000-0x000000001B732000-memory.dmp

Filesize
72KB

Download
memory/2868-13-0x000000001C7A0000-0x000000001C7DC000-memory.dmp

Filesize
240KB

Download
memory/2868-14-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/3980-0-0x00007FFEBACC3000-0x00007FFEBACC5000-memory.dmp

Filesize
8KB

Download
memory/3980-1-0x00000000003B0000-0x00000000006D4000-memory.dmp

Filesize
3.1MB

Download
memory/3980-2-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/3980-5-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download